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Allan ATL, LaBarge LR, Bailey AL, Jones B, Mason Z, Pinfield T, Schröder F, Whitaker A, White AF, Wilkinson H, Hill RA. Behavioural compatibility, not fear, best predicts the looking patterns of chacma baboons. Commun Biol 2024; 7:980. [PMID: 39134612 PMCID: PMC11319805 DOI: 10.1038/s42003-024-06657-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 07/30/2024] [Indexed: 08/15/2024] Open
Abstract
Animal vigilance is often investigated under a narrow set of scenarios, but this approach may overestimate its contribution to animal lives. A solution may be to sample all looking behaviours and investigate numerous competing hypotheses in a single analysis. In this study, using a wild group of habituated chacma baboons (Papio ursinus griseipes) as a model system, we implemented a framework for predicting the key drivers of looking by comparing the strength of a full array of biological hypotheses. This included methods for defining individual-specific social threat environments, quantifying individual tolerance to human observers, and incorporating predator resource selection functions. Although we found evidence supporting reactionary and within-group (social) vigilance hypotheses, risk factors did not predict looking with the greatest precision, suggesting vigilance was not a major component of the animals' behavioural patterns generally. Instead, whilst some behaviours constrain opportunities for looking, many shared compatibility with looking, alleviating the pressure to be pre-emptively vigilant for threats. Exploring looking patterns in a thorough multi-hypothesis framework should be feasible across a range of taxa, offering new insights into animal behaviour that could alter our concepts of fear ecology.
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Affiliation(s)
- Andrew T L Allan
- Department of Anthropology, Durham University, Durham, UK.
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa.
| | - Laura R LaBarge
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
- Department for the Ecology of Animal Societies, Max Planck Institute of Animal Behavior, Konstanz, Germany
| | - Annie L Bailey
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Benjamin Jones
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Zachary Mason
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Thomas Pinfield
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Felix Schröder
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Alex Whitaker
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Amy F White
- Department of Anthropology, Durham University, Durham, UK
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Henry Wilkinson
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
| | - Russell A Hill
- Department of Anthropology, Durham University, Durham, UK
- Primate and Predator Project, Lajuma Research Centre, Louis Trichardt, South Africa
- Department of Zoology, University of Venda, Thohoyandou, South Africa
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Kojima LV, Kohl MT, Rainwater TR, Parrott BB, Tuberville TD. Association of size, climatic factors, and mercury body burdens with movement behavior in American alligators. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 921:170859. [PMID: 38365032 DOI: 10.1016/j.scitotenv.2024.170859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 02/05/2024] [Accepted: 02/07/2024] [Indexed: 02/18/2024]
Abstract
Animal movement behavior provides insight into organismal and ecological function. These functions are often disturbed by anthropogenic influences, such as urbanization and habitat fragmentation, yet the effects of long-term exposures to environmental contaminants on movement have yet to be examined. The long lifespans and broad diets of crocodilians often lead to bioaccumulation of persistent contaminants and confer a marked vulnerability to consequent physiological effects. In this study, we investigate the relationships between blood concentrations of mercury (Hg), a widespread contaminant with well characterized neurotoxicity, and movement patterns in free living, naturally exposed American alligators (Alligator mississippiensis). We sampled adult male alligators from two former nuclear cooling reservoirs with different Hg contamination histories and placed GPS transmitters on a subset of individuals from each reservoir (13 total). Data collected over the ensuing two years were analyzed using a linear mixed effects framework combined with AICc model selection to resolve the relationships linking seasonal alligator movement (daily activity (s) and daily distance (m)) and home range to climate conditions, individual traits, and blood Hg concentrations (mg/kg; wet weight). We found that climate conditions, alligator size (snout-vent-length), and blood Hg concentrations all influence alligator daily activity but do not contribute to alligator daily movement (distance). Furthermore, we found that blood Hg concentrations were strongly correlated with seasonal home range size where individuals with elevated Hg had larger home ranges in spring, fall, and winter. These findings provide insight into how climate, anthropogenic contaminants, and individual traits relate to alligator movement patterns across seasons.
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Affiliation(s)
- Laura V Kojima
- Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken, SC 29802, USA; Odum School of Ecology, University of Georgia, 140 E Green St, Athens, GA 30602, USA.
| | - Michel T Kohl
- Warnell School of Forestry and Natural Resources, University of Georgia, 180 E Green St, Athens, GA 30602, USA.
| | - Thomas R Rainwater
- Baruch Institute of Coastal Ecology and Forest Science, Clemson University, Georgetown, SC, USA; Tom Yawkey Wildlife Center, Georgetown, SC, USA
| | - Benjamin B Parrott
- Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken, SC 29802, USA; Odum School of Ecology, University of Georgia, 140 E Green St, Athens, GA 30602, USA.
| | - Tracey D Tuberville
- Savannah River Ecology Laboratory, University of Georgia, P.O. Drawer E, Aiken, SC 29802, USA.
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Sauvé CC, Berentsen AR, Llanos SF, Gilbert AT, Leighton PA. Home range overlap between small Indian mongooses and free roaming domestic dogs in Puerto Rico: implications for rabies management. Sci Rep 2023; 13:22944. [PMID: 38135706 PMCID: PMC10746706 DOI: 10.1038/s41598-023-50261-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Accepted: 12/18/2023] [Indexed: 12/24/2023] Open
Abstract
The small Indian mongoose (Urva auropunctata) is the primary terrestrial wildlife rabies reservoir on at least four Caribbean islands, including Puerto Rico. In Puerto Rico, mongooses represent a risk to public health, based on direct human exposure and indirectly through the transmission of rabies virus to domestic animals. To date, the fundamental ecological relationships of space use among mongooses and between mongooses and domestic animals remain poorly understood. This study is the first to report mongoose home range estimates based on GPS telemetry, as well as concurrent space use among mongooses and free roaming domestic dogs (FRDD; Canis lupus familiaris). Mean (± SE) home range estimates from 19 mongooses in this study (145 ± 21 ha and 60 ± 14 ha for males and females, respectively) were greater than those reported in prior radiotelemetry studies in Puerto Rico. At the scale of their home range, mongooses preferentially used dry forest and shrubland areas, but tended to avoid brackish water vegetation, salt marshes, barren lands and developed areas. Home ranges from five FRDDs were highly variable in size (range 13-285 ha) and may be influenced by availability of reliable anthropogenic resources. Mongooses displayed high home range overlap (general overlap index, GOI = 82%). Home range overlap among mongooses and FRDDs was intermediate (GOI = 50%) and greater than home range overlap by FRDDs (GOI = 10%). Our results provide evidence that space use by both species presents opportunities for interspecific interaction and contact and suggests that human provisioning of dogs may play a role in limiting interactions between stray dogs and mongooses.
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Affiliation(s)
- Caroline C Sauvé
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Rue Sicotte, Saint-Hyacinthe, QC, J2S 2M2, Canada.
| | - Are R Berentsen
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO, 80521, USA
| | - Steven F Llanos
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, PO Box 38, Lajas, PR, 00667, USA
| | - Amy T Gilbert
- United States Department of Agriculture, Animal and Plant Health Inspection Service, Wildlife Services, National Wildlife Research Center, 4101 LaPorte Avenue, Fort Collins, CO, 80521, USA
| | - Patrick A Leighton
- Faculté de Médecine Vétérinaire, Université de Montréal, 3200 Rue Sicotte, Saint-Hyacinthe, QC, J2S 2M2, Canada
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Warret Rodrigues C, Roth JD. Coexistence of two sympatric predators in a transitional ecosystem under constraining environmental conditions: a perspective from space and habitat use. MOVEMENT ECOLOGY 2023; 11:60. [PMID: 37784160 PMCID: PMC10544556 DOI: 10.1186/s40462-023-00421-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Accepted: 09/07/2023] [Indexed: 10/04/2023]
Abstract
BACKGROUND Range expansion of species, a major consequence of climate changes, may alter communities substantially due to competition between expanding and native species. METHODS We first quantified size differences between an expanding habitat generalist, the red fox (Vulpes vulpes), and a circumpolar habitat specialist, the Arctic foxes (Vulpes lagopus), at the edge of the Arctic, where climate-related changes occur rapidly, to predict the likelihood of the larger competitor escalating interference to intraguild killing. We then used satellite telemetry to evaluate competition in a heterogeneous landscape by examining space use early during the foxes' reproductive period, when resource scarcity, increased-food requirements and spatial constraints likely exacerbate the potential for interference. We used time-LoCoH to quantify space and habitat use, and Minta's index to quantify spatio-temporal interactions between neighbors. RESULTS Our morphometric comparison involving 236 foxes found that the potential for escalated interference between these species was high due to intermediate size difference. However, our results from 17 collared foxes suggested that expanding and native competitors may coexist when expanding species occur at low densities. Low home-range overlap between neighbors suggested territoriality and substantial exploitation competition for space. No obvious differential use of areas shared by heterospecific neighbors suggested low interference. If anything, intraspecific competition between red foxes may be stronger than interspecific competition. Red and Arctic foxes used habitat differentially, with near-exclusive use of forest patches by red foxes and marine habitats by Arctic foxes. CONCLUSION Heterogeneous landscapes may relax interspecific competition between expanding and native species, allowing exclusive use of some resources. Furthermore, the scarcity of habitats favored by expanding species may emphasize intraspecific competition between newcomers over interspecific competition, thus creating the potential for self-limitation of expanding populations. Dominant expanding competitors may benefit from interference, but usually lack adaptations to abiotic conditions at their expansion front, favoring rear-edge subordinate species in exploitation competition. However, due to ongoing climate change, systems are usually not at equilibrium. A spread of habitats and resources favorable to expanding species may promote higher densities of antagonistically dominant newcomers, which may lead to extirpation of native species.
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Affiliation(s)
- Chloé Warret Rodrigues
- Department of Biological Sciences, University of Manitoba, 50 Sifton Road, Winnipeg, MB, R3T 2N2, Canada.
| | - James D Roth
- Department of Biological Sciences, University of Manitoba, 50 Sifton Road, Winnipeg, MB, R3T 2N2, Canada
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Huang YH, Owen-Smith N, Henley MD, Kilian JW, Kamath PL, Ochai SO, van Heerden H, Mfune JKE, Getz WM, Turner WC. Variation in herbivore space use: comparing two savanna ecosystems with different anthrax outbreak patterns in southern Africa. MOVEMENT ECOLOGY 2023; 11:46. [PMID: 37525286 PMCID: PMC10392021 DOI: 10.1186/s40462-023-00385-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Accepted: 04/16/2023] [Indexed: 08/02/2023]
Abstract
BACKGROUND The distribution of resources can affect animal range sizes, which in turn may alter infectious disease dynamics in heterogenous environments. The risk of pathogen exposure or the spatial extent of outbreaks may vary with host range size. This study examined the range sizes of herbivorous anthrax host species in two ecosystems and relationships between spatial movement behavior and patterns of disease outbreaks for a multi-host environmentally transmitted pathogen. METHODS We examined range sizes for seven host species and the spatial extent of anthrax outbreaks in Etosha National Park, Namibia and Kruger National Park, South Africa, where the main host species and outbreak sizes differ. We evaluated host range sizes using the local convex hull method at different temporal scales, within-individual temporal range overlap, and relationships between ranging behavior and species contributions to anthrax cases in each park. We estimated the spatial extent of annual anthrax mortalities and evaluated whether the extent was correlated with case numbers of a given host species. RESULTS Range size differences among species were not linearly related to anthrax case numbers. In Kruger the main host species had small range sizes and high range overlap, which may heighten exposure when outbreaks occur within their ranges. However, different patterns were observed in Etosha, where the main host species had large range sizes and relatively little overlap. The spatial extent of anthrax mortalities was similar between parks but less variable in Etosha than Kruger. In Kruger outbreaks varied from small local clusters to large areas and the spatial extent correlated with case numbers and species affected. Secondary host species contributed relatively few cases to outbreaks; however, for these species with large range sizes, case numbers positively correlated with outbreak extent. CONCLUSIONS Our results provide new information on the spatiotemporal structuring of ranging movements of anthrax host species in two ecosystems. The results linking anthrax dynamics to host space use are correlative, yet suggest that, though partial and proximate, host range size and overlap may be contributing factors in outbreak characteristics for environmentally transmitted pathogens.
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Affiliation(s)
- Yen-Hua Huang
- Wisconsin Cooperative Wildlife Research Unit, Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI, 53706, USA.
| | - Norman Owen-Smith
- Centre for African Ecology, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Wits, 2050, South Africa
| | - Michelle D Henley
- Applied Behavioural Ecology and Ecosystem Research Unit, School of Environmental Sciences, University of South Africa, Florida, Johannesburg, 1710, South Africa
- Elephants Alive, Ekuthuleni Shareblock Ltd, Hoedspruit, 1380, South Africa
- Department of Philosophy, Faculty of Humanities, University of Johannesburg, Auckland Park, 2006, South Africa
| | - J Werner Kilian
- Etosha Ecological Institute (retired), Etosha National Park, Ministry of Environment, Forestry and Tourism, Okaukuejo, Namibia
| | - Pauline L Kamath
- School of Food and Agriculture, University of Maine, Orono, ME, 04469, USA
| | - Sunday O Ochai
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort, South Africa
| | - Henriette van Heerden
- Department of Veterinary Tropical Diseases, University of Pretoria, Onderstepoort, South Africa
| | - John K E Mfune
- Department of Environmental Science, University of Namibia, Windhoek, Namibia
| | - Wayne M Getz
- Department of Environmental Science, Policy & Management, University of California, Berkeley, CA, 94704, USA
- School of Mathematical Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Wendy C Turner
- Wisconsin Cooperative Wildlife Research Unit, U.S. Geological Survey, Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, Madison, WI, 53706, USA
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6
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Nisi AC, Benson JF, King R, Wilmers CC. Habitat fragmentation reduces survival and drives source-sink dynamics for a large carnivore. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2023; 33:e2822. [PMID: 36807453 DOI: 10.1002/eap.2822] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 01/08/2023] [Accepted: 01/11/2023] [Indexed: 06/02/2023]
Abstract
Rigorous understanding of how environmental conditions impact population dynamics is essential for species conservation, especially in mixed-use landscapes where source-sink dynamics may be at play. Conservation of large carnivore populations in fragmented, human-dominated landscapes is critical for their long-term persistence. However, living in human-dominated landscapes comes with myriad costs, including direct anthropogenic mortality and sublethal energetic costs. How these costs impact individual fitness and population dynamics are not fully understood, partly due to the difficulty in collecting long-term demographic data for these species. Here, we analyzed an 11-year dataset on puma (Puma concolor) space use, mortality, and reproduction in the Santa Cruz Mountains, California, USA, to quantify how living in a fragmented landscape impacts individual survival and population dynamics. Long-term exposure to housing density drove mortality risk for female pumas, resulting in an 18-percentage-point reduction in annual survival for females in exurban versus remote areas. While the overall population growth rate appeared stable, reduced female survival in more developed areas resulted in source-sink dynamics across the study area, with 42.1% of the Santa Cruz Mountains exhibiting estimated population growth rates <1. Since habitat selection is often used as a proxy for habitat quality, we also assessed whether puma habitat selection predicted source and sink areas. Patterns of daytime puma habitat selection predicted source areas, while time-of-day-independent habitat selection performed less well as a proxy. These results illuminate the individual- and population-level consequences of habitat fragmentation for large carnivores, illustrating that habitat fragmentation can produce source-sink dynamics that may not be apparent from other metrics of habitat quality. Locally, conserving high-quality source habitat within the Santa Cruz Mountains is necessary to support long-term puma population persistence. More broadly, source-sink dynamics may at play for other carnivore populations in similar fragmented systems, and linking landscape conditions to population dynamics is essential for effective conservation. Caution should be used in inferring habitat quality from habitat selection alone, but these results shed light on metrics of selection that may be better or worse proxies to identify source areas for large carnivores.
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Affiliation(s)
- Anna C Nisi
- Center for Integrated Spatial Research, Environmental Studies Department, University of California, Santa Cruz, California, USA
- Biology Department, University of Washington, Seattle, Washington, USA
| | - John F Benson
- School of Natural Resources, University of Nebraska, Lincoln, Nebraska, USA
| | - Richard King
- Center for Integrated Spatial Research, Environmental Studies Department, University of California, Santa Cruz, California, USA
| | - Christopher C Wilmers
- Center for Integrated Spatial Research, Environmental Studies Department, University of California, Santa Cruz, California, USA
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Kraft S, Gandra M, Lennox RJ, Mourier J, Winkler AC, Abecasis D. Residency and space use estimation methods based on passive acoustic telemetry data. MOVEMENT ECOLOGY 2023; 11:12. [PMID: 36859381 PMCID: PMC9976422 DOI: 10.1186/s40462-022-00364-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 12/26/2022] [Indexed: 06/18/2023]
Abstract
Acoustic telemetry has helped overcome many of the challenges faced when studying the movement ecology of aquatic species, allowing to obtain unprecedented amounts of data. This has made it into one of the most widely used methods nowadays. Many ways to analyse acoustic telemetry data have been made available and deciding on how to analyse the data requires considering the type of research objectives, relevant properties of the data (e.g., resolution, study design, equipment), habits of the study species, researcher experience, among others. To ease this decision process, here we showcase (1) some of the methods used to estimate pseudo-positions and positions from raw acoustic telemetry data, (2) methods to estimate residency and (3) methods to estimate two-dimensional home and occurrence range using geometric or hull-based methods and density-distribution methods, a network-based approach, and three-dimensional methods. We provide examples of some of these were tested using a sample of real data. With this we intend to provide the necessary background for the selection of the method(s) that better fit specific research objectives when using acoustic telemetry.
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Affiliation(s)
- S Kraft
- Center of Marine Sciences (CCMAR), Universidade do Algarve, Faro, Portugal.
| | - M Gandra
- Center of Marine Sciences (CCMAR), Universidade do Algarve, Faro, Portugal
| | - R J Lennox
- Laboratory for Freshwater Ecology and Inland Fisheries at NORCE Norwegian Research Center, Bergen, Norway
- Norwegian Institute for Nature Research (NINA), Trondheim, Norway
| | - J Mourier
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
| | - A C Winkler
- Center of Marine Sciences (CCMAR), Universidade do Algarve, Faro, Portugal
- Department of Ichthyology and Fisheries Science, Rhodes University, Makhanda, South Africa
| | - D Abecasis
- Center of Marine Sciences (CCMAR), Universidade do Algarve, Faro, Portugal
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Barker NA, Joubert FG, Kasaona M, Shatumbu G, Stowbunenko V, Alexander KA, Slotow R, Getz WM. Coursing hyenas and stalking lions: The potential for inter- and intraspecific interactions. PLoS One 2023; 18:e0265054. [PMID: 36735747 PMCID: PMC9897591 DOI: 10.1371/journal.pone.0265054] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Accepted: 01/16/2023] [Indexed: 02/04/2023] Open
Abstract
Resource partitioning promotes coexistence among guild members, and carnivores reduce interference competition through behavioral mechanisms that promote spatio-temporal separation. We analyzed sympatric lion and spotted hyena movements and activity patterns to ascertain the mechanisms facilitating their coexistence within semi-arid and wetland ecosystems. We identified recurrent high-use (revisitation) and extended stay (duration) areas within home ranges, as well as correlated movement-derived measures of inter- and intraspecific interactions with environmental variables. Spatial overlaps among lions and hyenas expanded during the wet season, and occurred at edges of home ranges, around water-points, along pathways between patches of high-use areas. Lions shared more of their home ranges with spotted hyenas in arid ecosystems, but shared more of their ranges with conspecifics in mesic environments. Despite shared space use, we found evidence for subtle temporal differences in the nocturnal movement and activity patterns between the two predators, suggesting a fine localized-scale avoidance strategy. Revisitation frequency and duration within home ranges were influenced by interspecific interactions, after land cover categories and diel cycles. Intraspecific interactions were also important for lions and, important for hyenas were moon illumination and ungulates attracted to former anthrax carcass sites in Etosha, with distance to water in Chobe/Linyanti. Recursion and duration according to locales of competitor probabilities were similar among female lions and both sexes of hyenas, but different for male lions. Our results suggest that lions and spotted hyenas mediate the potential for interference competition through subtle differences in temporal activity, fine-scale habitat use differentiation, and localized reactive-avoidance behaviors. These findings enhance our understanding of the potential effects of interspecific interactions among large carnivore space-use patterns within an apex predator system and show adaptability across heterogeneous and homogeneous environments. Future conservation plans should emphasize the importance of inter- and intraspecific competition within large carnivore communities, particularly moderating such effects within increasingly fragmented landscapes.
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Affiliation(s)
- Nancy A. Barker
- School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
- * E-mail:
| | | | - Marthin Kasaona
- Etosha Ecological Institute, Ministry of Environment and Tourism, Okaukeujo, Namibia
| | - Gabriel Shatumbu
- Etosha Ecological Institute, Ministry of Environment and Tourism, Okaukeujo, Namibia
| | - Vincent Stowbunenko
- Department of Computer Science, San José State University, San Jose, California, United States of America
| | - Kathleen A. Alexander
- Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, Virginia, United States of America
| | - Rob Slotow
- Oppenheimer Fellow in Functional Ecology, Centre for Functional Ecology, School of Life Sciences, University of KwaZulu-Natal, Pietermaritzburg, South Africa
| | - Wayne M. Getz
- Department of Environmental Science, Policy & Management, University of California, Berkeley, California, United States of America
- School of Mathematical Sciences, University of KwaZulu-Natal, Durban, South Africa
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Opatz AP, Fulbright TE, Mizer G, DeYoung RW, Conway WC, Gray SS, Hewitt DG. Influence of cropland on resource selection by pronghorn. J Wildl Manage 2023. [DOI: 10.1002/jwmg.22372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Anthony P. Opatz
- Caesar Kleberg Wildlife Research Institute Texas A&M University Kingsville Kingsville TX 78363 USA
| | - Timothy E. Fulbright
- Caesar Kleberg Wildlife Research Institute Texas A&M University Kingsville Kingsville TX 78363 USA
| | - Gary Mizer
- Department of Natural Resources Management Texas Tech University Lubbock TX 79410 USA
| | - Randy W. DeYoung
- Caesar Kleberg Wildlife Research Institute Texas A&M University Kingsville Kingsville TX 78363 USA
| | - Warren C. Conway
- Department of Natural Resources Management Texas Tech University Lubbock TX 79410 USA
| | - Shawn S. Gray
- Texas Parks and Wildlife Department Alpine TX 79830 USA
| | - David G. Hewitt
- Caesar Kleberg Wildlife Research Institute Texas A&M University Kingsville Kingsville TX 78363 USA
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Chatzidiakou L, Krause A, Kellaway M, Han Y, Li Y, Martin E, Kelly FJ, Zhu T, Barratt B, Jones RL. Automated classification of time-activity-location patterns for improved estimation of personal exposure to air pollution. Environ Health 2022; 21:125. [PMID: 36482402 PMCID: PMC9733291 DOI: 10.1186/s12940-022-00939-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 11/07/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Air pollution epidemiology has primarily relied on measurements from fixed outdoor air quality monitoring stations to derive population-scale exposure. Characterisation of individual time-activity-location patterns is critical for accurate estimations of personal exposure and dose because pollutant concentrations and inhalation rates vary significantly by location and activity. METHODS We developed and evaluated an automated model to classify major exposure-related microenvironments (home, work, other static, in-transit) and separated them into indoor and outdoor locations, sleeping activity and five modes of transport (walking, cycling, car, bus, metro/train) with multidisciplinary methods from the fields of movement ecology and artificial intelligence. As input parameters, we used GPS coordinates, accelerometry, and noise, collected at 1 min intervals with a validated Personal Air quality Monitor (PAM) carried by 35 volunteers for one week each. The model classifications were then evaluated against manual time-activity logs kept by participants. RESULTS Overall, the model performed reliably in classifying home, work, and other indoor microenvironments (F1-score>0.70) but only moderately well for sleeping and visits to outdoor microenvironments (F1-score=0.57 and 0.3 respectively). Random forest approaches performed very well in classifying modes of transport (F1-score>0.91). We found that the performance of the automated methods significantly surpassed those of manual logs. CONCLUSIONS Automated models for time-activity classification can markedly improve exposure metrics. Such models can be developed in many programming languages, and if well formulated can have general applicability in large-scale health studies, providing a comprehensive picture of environmental health risks during daily life with readily gathered parameters from smartphone technologies.
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Affiliation(s)
- Lia Chatzidiakou
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Rd, CB2 1EW Cambridge, UK
| | - Anika Krause
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Rd, CB2 1EW Cambridge, UK
- Institute for Chemistry, University of Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
| | | | - Yiqun Han
- Environmental Research Group, MRC Centre for Environment and Health, Imperial College London, W12 0BZ London, UK
| | - Yilin Li
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Rd, CB2 1EW Cambridge, UK
| | - Elizabeth Martin
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Rd, CB2 1EW Cambridge, UK
| | - Frank J. Kelly
- Environmental Research Group, MRC Centre for Environment and Health, Imperial College London, W12 0BZ London, UK
| | - Tong Zhu
- BIC-ESAT and SKL-ESPC, College of Environmental Sciences and Engineering, Center for Environment and Health, Peking University, 100871 Beijing, China
| | - Benjamin Barratt
- Environmental Research Group, MRC Centre for Environment and Health, Imperial College London, W12 0BZ London, UK
| | - Roderic L. Jones
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Rd, CB2 1EW Cambridge, UK
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11
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Bird eggs or wheat: Assessing the impact of an overabundant crow species in a landscape mosaic in the Negev desert of Israel. J Nat Conserv 2022. [DOI: 10.1016/j.jnc.2022.126283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Leighton GRM, Bishop JM, Camarero PR, Mateo R, O'Riain MJ, Serieys LEK. Poisoned chalice: Use of transformed landscapes associated with increased persistent organic pollutant concentrations and potential immune effects for an adaptable carnivore. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 822:153581. [PMID: 35104517 DOI: 10.1016/j.scitotenv.2022.153581] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/27/2022] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
Wildlife around cities bioaccumulate multiple harmful environmental pollutants associated with human activities. Exposure severity can vary based on foraging behaviour and habitat use, which can be examined to elucidate exposure pathways. Carnivores can play vital roles in ecosystem stability but are particularly vulnerable to bioaccumulation of pollutants. Understanding the spatial and dietary predictors of these contaminants can inform pollutant control, and carnivores, at the top of food webs, can act as useful indicator species. We test for exposure to toxic organochlorines (OCs), including dichloro-diphenyl-trichloroethane (DDT) and polychlorinated biphenyls (PCBs), in a medium-sized felid, the caracal (Caracal caracal), across the peri-urban and agricultural landscapes of the city of Cape Town, South Africa. Concentrations in both blood (n = 69) and adipose tissue (n = 25) were analysed along with detailed spatial, dietary, demographic, and physiological data to assess OC sources and exposure risk. The analysis revealed widespread exposure of Cape Town's caracals to organochlorines: detection rate was 100% for PCBs and 83% for DDTs in blood, and 100% for both compounds in adipose. Caracals using human-transformed areas, such as vineyards and areas with higher human population and electrical transformer density, as well as wetland areas, had higher organochlorine burdens. These landscapes were also highly selected foraging areas, suggesting caracals are drawn into areas that co-incidentally increase their risk of exposure to these pollutants. Further, biomagnification potential was higher in individuals feeding on higher trophic level prey and on exotic prey. These findings point to bioaccumulation of OC toxicants and widespread exposure across local food webs. Additionally, we report possible physiological effects of exposure, including elevated white blood cell and platelet count, suggesting a degree of immunological response that may increase disease susceptibility. Cape Town's urban fringes likely represent a source of toxic chemicals for wildlife and require focused attention and action to ensure persistence of this adaptable mesocarnivore.
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Affiliation(s)
- Gabriella R M Leighton
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa.
| | - Jacqueline M Bishop
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
| | - Pablo R Camarero
- Instituto de Investigación en Recursos Cinegéticos (IREC - CSIC, UCLM, JCCM), Ciudad Real, Spain
| | - Rafael Mateo
- Instituto de Investigación en Recursos Cinegéticos (IREC - CSIC, UCLM, JCCM), Ciudad Real, Spain
| | - M Justin O'Riain
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
| | - Laurel E K Serieys
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa; Cape Leopard Trust, Cape Town, South Africa; Panthera, NY, New York, USA
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13
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Gray SM, Humphreys JM, Montgomery RA, Etter DR, VerCauteren KC, Kramer DB, Roloff GJ. Behavioral states in space and time: understanding landscape use by an invasive mammal. J Wildl Manage 2022. [DOI: 10.1002/jwmg.22211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Steven M. Gray
- Department of Fisheries and Wildlife Michigan State University 480 Wilson Road, 13 Natural Resources Building East Lansing MI 48824 USA
| | - John M. Humphreys
- Pest Management Research Unit, United States Department of Agriculture Agricultural Research Service Sidney MT 59270 USA
| | - Robert A. Montgomery
- Wildlife Conservation Research Unit, Department of Zoology, University of Oxford The Recanati‐Kaplan Centre Tubney House, Abingdon Road Tubney Oxon OX13 5QL United Kingdom
| | - Dwayne R. Etter
- Michigan Department of Natural Resources–Wildlife Division Lansing MI 48911 USA
| | - Kurt C. VerCauteren
- National Wildlife Research Center, United States Department of Agriculture Wildlife Services Fort Collins CO 80521 USA
| | - Daniel B. Kramer
- Department of Fisheries and Wildlife Michigan State University 480 Wilson Road, 13 Natural Resources Building East Lansing MI 48824 USA
- James Madison College Michigan State University East Lansing MI 48824 USA
| | - Gary J. Roloff
- Department of Fisheries and Wildlife Michigan State University 480 Wilson Road, 13 Natural Resources Building East Lansing MI 48824 USA
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14
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Huang Y, Kausrud K, Hassim A, Ochai SO, van Schalkwyk OL, Dekker EH, Buyantuev A, Cloete CC, Kilian JW, Mfune JKE, Kamath PL, van Heerden H, Turner WC. Environmental drivers of biseasonal anthrax outbreak dynamics in two multihost savanna systems. ECOL MONOGR 2022. [DOI: 10.1002/ecm.1526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yen‐Hua Huang
- Wisconsin Cooperative Wildlife Research Unit, Department of Forest and Wildlife Ecology University of Wisconsin‐Madison Madison WI USA
| | - Kyrre Kausrud
- Norwegian Veterinary Institute, PO. box 64 Ås Norway
| | - Ayesha Hassim
- Department of Veterinary Tropical Diseases University of Pretoria Onderstepoort South Africa
| | - Sunday O. Ochai
- Department of Veterinary Tropical Diseases University of Pretoria Onderstepoort South Africa
| | - O. Louis van Schalkwyk
- Department of Veterinary Tropical Diseases University of Pretoria Onderstepoort South Africa
- Office of the State Veterinarian, Department of Agriculture, Land Reform and Rural Development Government of South Africa Skukuza South Africa
- Department of Migration Max Planck Institute of Animal Behavior Radolfzell Germany
| | - Edgar H. Dekker
- Office of the State Veterinarian, Department of Agriculture, Land Reform and Rural Development Government of South Africa Skukuza South Africa
| | - Alexander Buyantuev
- Department of Geography and Planning, University at Albany State University of New York Albany NY USA
| | - Claudine C. Cloete
- Etosha Ecological Institute, Etosha National Park, Ministry of Environment, Forestry and Tourism Namibia
| | - J. Werner Kilian
- Etosha Ecological Institute, Etosha National Park, Ministry of Environment, Forestry and Tourism Namibia
| | - John K. E. Mfune
- Department of Environmental Science University of Namibia Windhoek Namibia
| | | | - Henriette van Heerden
- Department of Veterinary Tropical Diseases University of Pretoria Onderstepoort South Africa
- Faculty of Veterinary Science, Department of Veterinary Tropical Diseases University of Pretoria Onderstepoort South Africa
| | - Wendy C. Turner
- U.S. Geological Survey, Wisconsin Cooperative Wildlife Research Unit, Department of Forest and Wildlife Ecology University of Wisconsin‐Madison Madison WI USA
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15
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Sparkes J, Körtner G, Ballard G, Fleming PJ. Spatial and temporal activity patterns of owned, free-roaming dogs in coastal eastern Australia. Prev Vet Med 2022; 204:105641. [DOI: 10.1016/j.prevetmed.2022.105641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 03/24/2022] [Accepted: 04/01/2022] [Indexed: 11/25/2022]
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16
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Spatial ecology of female bighorn sheep in a prairie landscape in Nebraska. J Wildl Manage 2022. [DOI: 10.1002/jwmg.22201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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17
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Griesberger P, Obermair L, Zandl J, Stalder G, Arnold W, Hackländer K. Hunting suitability model: a new tool for managing wild ungulates. WILDLIFE BIOLOGY 2022. [DOI: 10.1002/wlb3.01021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Paul Griesberger
- Department of Integrative Biology and Biodiversity Research, Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences Vienna Austria
| | - Leopold Obermair
- Department of Integrative Biology and Biodiversity Research, Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences Vienna Austria
- Lower Austrian Hunting Organisation Vienna Austria
| | - Josef Zandl
- Gutsverwaltung Fischhorn GmbH&Co. KG Kaprun Austria
| | - Gabrielle Stalder
- Department of Interdisciplinary Life Sciences, Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna Vienna Austria
| | - Walter Arnold
- Department of Interdisciplinary Life Sciences, Research Institute of Wildlife Ecology, University of Veterinary Medicine Vienna Vienna Austria
| | - Klaus Hackländer
- Department of Integrative Biology and Biodiversity Research, Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences Vienna Austria
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18
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Mohr AS, Ewanyk J, Hardy O, Windsor J, Zulliger E, Hilson C, Gunther MS, Bean WT. A multi‐metric movement model for identifying elk parturition events. WILDLIFE SOC B 2022. [DOI: 10.1002/wsb.1256] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Adam S. Mohr
- Department of Wildlife Humboldt State University Arcata 95521 CA USA
| | - Jon Ewanyk
- Department of Wildlife Humboldt State University Arcata 95521 CA USA
| | - Owen Hardy
- Department of Wildlife Humboldt State University Arcata 95521 CA USA
| | - Justin Windsor
- Department of Wildlife Humboldt State University Arcata 95521 CA USA
| | - Erin Zulliger
- Department of Wildlife Humboldt State University Arcata 95521 CA USA
| | | | | | - William T. Bean
- Department of Wildlife Humboldt State University Arcata 95521 CA USA
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19
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Parker EJ, Hill RA, Koyama NF. Behavioral responses to spatial variation in perceived predation risk and resource availability in an arboreal primate. Ecosphere 2022. [DOI: 10.1002/ecs2.3945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Edwin J. Parker
- School of Natural Sciences and Psychology Liverpool John Moores University Liverpool UK
- Primate and Predator Project Lajuma Research Centre Louis Trichardt South Africa
| | - Russell A. Hill
- Primate and Predator Project Lajuma Research Centre Louis Trichardt South Africa
- Department of Anthropology Durham University Durham UK
- Department of Zoology University of Venda Thohoyandou South Africa
| | - Nicola F. Koyama
- School of Natural Sciences and Psychology Liverpool John Moores University Liverpool UK
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20
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Lai S, Warret Rodrigues C, Gallant D, Roth JD, Berteaux D. Red foxes at their northern edge: competition with the Arctic fox and winter movements. J Mammal 2022. [DOI: 10.1093/jmammal/gyab164] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Abstract
Rapid range expansion of boreal forest predators onto the tundra may disrupt local ecological processes, notably through competition with ecologically similar species. Red foxes (Vulpes vulpes) have expanded their range northwards throughout the Canadian Arctic, inducing competition with endemic Arctic foxes (V. lagopus). We studied competition between Arctic and red foxes, with a focus on interference competition, and winter movements of red foxes using satellite telemetry and den occupancy data from both species. We worked at Bylot Island (Nunavut) and Herschel Island (northern Yukon), two sites at the northern limit of the red fox’s range. As expected, red fox home ranges were 56% larger on average than Arctic fox home ranges. However, red foxes did not exclude Arctic foxes regionally nor did they prevent them from breeding successfully in their vicinity. On Bylot Island, Arctic foxes did not spatially avoid red foxes more than their conspecifics, as evidenced by similar intra- and interspecific home-range overlaps. On Herschel Island, the red fox pair’s home range extensively overlapped the home range of their Arctic fox neighbors. While red foxes tracked on Bylot Island survived several winters without expanding or leaving their home ranges, those on Herschel Island moved onto the sea ice and died. Overall, our results demonstrate low levels of interference competition between the two species in the High Canadian Arctic. When red fox density is low, as in our study areas where land protection prevents predator subsidization by anthropogenic food sources, Arctic and red foxes may be able to co-exist with limited antagonistic interactions. Our sample sizes were limited by the naturally low density of red foxes at their northernmost edge. Replication therefore is needed to fully understand winter space use and intraguild interactions in this species at its northern range limit.
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Affiliation(s)
- Sandra Lai
- Canada Research Chair on Northern Biodiversity, Centre for Northern Studies and Quebec Center for Biodiversity Science, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Quebec, Canada
| | - Chloé Warret Rodrigues
- Department of Biological Sciences, University of Manitoba, 50 Sifton Road, Winnipeg, Manitoba, Canada
| | - Daniel Gallant
- Northern New Brunswick Field Unit, Parks Canada, 186 Route 117, Kouchibouguac, New Brunswick, Canada
| | - James D Roth
- Department of Biological Sciences, University of Manitoba, 50 Sifton Road, Winnipeg, Manitoba, Canada
| | - Dominique Berteaux
- Canada Research Chair on Northern Biodiversity, Centre for Northern Studies and Quebec Center for Biodiversity Science, Université du Québec à Rimouski, 300 Allée des Ursulines, Rimouski, Quebec, Canada
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21
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Analysis of Landscape Connectivity among the Habitats of Asian Elephants in Keonjhar Forest Division, India. REMOTE SENSING 2021. [DOI: 10.3390/rs13224661] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Land development has impacted natural landforms extensively, causing a decline in resources and negative consequences to elephant populations, habitats, and gene flow. Often, elephants seek to fulfill basic needs by wandering into nearby human communities, which leads to human–elephant conflict (HEC), a serious threat to conserving this endangered species. Understanding elephant space use and connectivity among their habitats can offset barriers to ecological flow among fragmented populations. We focused on the Keonjhar Forest Division in Eastern India, where HEC has resulted in the deaths of ~300 people and several hundred elephants, and damaged ~4100 houses and ~12,700 acres of cropland between 2001 and 2018. Our objectives were to (1) analyze elephant space use based on their occupancy; (2) map connectivity by considering the land structure and HEC occurrences; (3) assess the quality of mapped connectivity and identify potential bottlenecks. We found that (1) the study area has the potential to sustain a significant elephant population by providing safe connectivity; (2) variables like forests, precipitation, rural built-up areas, cropland, and transportation networks were responsible for predicting elephant presence (0.407, SE = 0.098); (3) five habitat cores, interconnected by seven corridors were identified, of which three habitat cores were vital for maintaining connectivity; (4) landscape features, such as cropland, rural built-up, mining, and transportation networks created bottlenecks that could funnel elephant movement. Our findings also indicate that overlooking HEC in connectivity assessments could lead to overestimation of functionality. The study outcomes can be utilized as a preliminary tool for decision making and early planning during development projects.
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22
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Urban habitat use and home ranges of fishing cats in Colombo, Sri Lanka. Mamm Biol 2021. [DOI: 10.1007/s42991-021-00198-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Karelus DL, Geary BW, Harveson LA, Harveson PM. Movement ecology and space-use by mountain lions in West Texas. Glob Ecol Conserv 2021. [DOI: 10.1016/j.gecco.2021.e01859] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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24
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Wengert GM, Higley JM, Gabriel MW, Rustigian-Romsos H, Spencer WD, Clifford DL, Thompson C. Distribution of trespass cannabis cultivation and its risk to sensitive forest predators in California and Southern Oregon. PLoS One 2021; 16:e0256273. [PMID: 34469430 PMCID: PMC8409643 DOI: 10.1371/journal.pone.0256273] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 08/03/2021] [Indexed: 11/19/2022] Open
Abstract
Illegal cannabis cultivation on public lands has emerged as a major threat to wildlife in California and southern Oregon due to the rampant use of pesticides, habitat destruction, and water diversions associated with trespass grow sites. The spatial distribution of cultivation sites, and the factors influencing where they are placed, remain largely unknown due to covert siting practices and limited surveillance funding. We obtained cannabis grow-site locality data from law enforcement agencies and used them to model the potential distribution of cultivation sites in forested regions of California and southern Oregon using maximum entropy (MaxEnt) methods. We mapped the likely distribution of trespass cannabis cultivation sites and identified environmental variables influencing where growers establish their plots to better understand the cumulative impacts of trespass cannabis cultivation on wildlife. We overlaid the resulting grow-site risk maps with habitat distribution maps for three forest species of conservation concern: Pacific fisher (Pekania pennanti), Humboldt marten (Martes caurina humboldtensis), and northern spotted owl (Strix occidentalis caurina). Results indicate that cannabis cultivation is fairly predictably distributed on public lands in low to mid-elevation (~800-1600m) forests and on moderate slopes (~30-60%). Somewhat paradoxically, results also suggest that growers either preferred sites inside of recently disturbed vegetation (especially those burned 8-12 years prior to cultivation) or well outside (>500m) of recent disturbance, perhaps indicating avoidance of open edges. We ground-truthed the model by surveying randomly selected stream courses for cultivation site presence in subsets of the modeling region and found previously undiscovered sites mostly within areas with predicted high likelihood of grow-site occurrence. Moderate to high-likelihood areas of trespass cultivation overlapped with 40 to 48% of modeled habitats of the three sensitive species. For the endangered southern Sierra Nevada fisher population, moderate-high likelihood growing areas overlapped with over 37% of modeled fisher denning habitat and with 100% of annual female fisher home ranges (mean overlap = 48.0% + 27.0 SD; n = 134) in two intensively studied populations on the Sierra National Forest. Locating and reclaiming contaminated cannabis grow sites by removing all environmental contaminants should be a high priority for resource managers.
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Affiliation(s)
- Greta M. Wengert
- Integral Ecology Research Center, Blue Lake, California, United States of America
| | - J. Mark Higley
- Wildlife Department, Hoopa Tribal Forestry, Hoopa, California, United States of America
| | - Mourad W. Gabriel
- Integral Ecology Research Center, Blue Lake, California, United States of America
- United States Forest Service, Law Enforcement and Investigations, Vallejo, California, United States of America
- University of California Davis, One Health Institute, Wildlife Health Center, Davis, California, United States of America
| | | | - Wayne D. Spencer
- Conservation Biology Institute, Corvallis, Oregon, United States of America
| | - Deana L. Clifford
- Wildlife Investigations Laboratory, California Department of Fish and Wildlife, Rancho Cordova, California, United States of America
| | - Craig Thompson
- United States Forest Service, Missoula, Montana, United States of America
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25
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Luisa Vissat L, Blackburn JK, Getz WM. A relative‐motion method for parsing spatiotemporal behaviour of dyads using GPS relocation data. Methods Ecol Evol 2021. [DOI: 10.1111/2041-210x.13700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Jason K. Blackburn
- Spatial Epidemiology and Ecology Research Laboratory Department of Geography University of Florida Gainesville FL USA
- Emerging Pathogens Institute University of Florida Gainesville FL USA
| | - Wayne M. Getz
- Department of ESPM University of California, Berkeley Berkeley CA USA
- School of Mathematical Sciences University of KwaZulu‐Natal Durban South Africa
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26
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Marneweck CJ, van Schalkwyk OL, Marneweck DG, Beverley G, Davies-Mostert HT, Parker DM. Reproductive state influences the degree of risk tolerance for a seasonally breeding mesopredator. Behav Ecol 2021. [DOI: 10.1093/beheco/arab018] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
The risk of predation can alter the way animals perceive costs and benefits in their environment, on which foraging decisions are made. To maximize fitness, animals with offspring show the most pronounced alteration in behavior because mothers experience increased nutritional requirements and increased vulnerability to predation. Therefore, the tolerance of risk is shaped, in part, by reproductive state. Like prey species, mesopredators balance a trade-off between food and predation to maximize fitness. However, few studies have acknowledged its importance. We investigated how mesopredators may alter their space use between periods when young are and are not vulnerable. Investigating the fine-scale space use of 19 packs of African wild dogs Lycaon pictus in the Kruger National Park, we found lower risk tolerance of denning packs; they re-visited area less frequently as lion and impala density increased and thus reduced the likelihood of risky encounters by avoiding areas where both risk and reward were high. By contrast, non-denning packs re-visited area less frequently as lion density increased and impala density decreased and thus avoided areas where reward was low, especially if risk was high. These results suggest that wild dogs shift their patterns of space use when the pack is most vulnerable. Ultimately, we found evidence of decreased risk tolerance by denning packs, likely because of increased vulnerability of lactating mothers and immobile pups. More broadly, our findings suggest that risk tolerance is dependent on reproductive state for mesopredators and should be considered as a possible mechanism for other mesopredators as well.
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Affiliation(s)
- Courtney J Marneweck
- School of Biology and Environmental Sciences, University of Mpumalanga, Mbombela, 1200, South Africa
- Endangered Wildlife Trust, 27 and 28 Austin Road, Midrand, 1685, South Africa
| | - O Louis van Schalkwyk
- Office of the State Veterinarian, Department of Agriculture, Land Reform and Rural Development, PO Box 12, Skukuza, 1350, South Africa
- Department of Migration, Institute of Animal Behavior, Am Obstberg 1, D-78315 Radolfzell, Germany
- Department of Veterinary Tropical Diseases, Faculty of Veterinary Science, University of Pretoria, Onderstepoort, 0110, South Africa
| | - David G Marneweck
- Endangered Wildlife Trust, 27 and 28 Austin Road, Midrand, 1685, South Africa
- Eugène Marais Chair of Wildlife Management, Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, 0002, South Africa
| | - Grant Beverley
- Endangered Wildlife Trust, 27 and 28 Austin Road, Midrand, 1685, South Africa
| | - Harriet T Davies-Mostert
- Endangered Wildlife Trust, 27 and 28 Austin Road, Midrand, 1685, South Africa
- Eugène Marais Chair of Wildlife Management, Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, 0002, South Africa
| | - Daniel M Parker
- School of Biology and Environmental Sciences, University of Mpumalanga, Mbombela, 1200, South Africa
- Wildlife and Reserve Management Research Group, Department of Zoology and Entomology, Rhodes University, Grahamstown, 6139, South Africa
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27
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Castellanos A, Castellanos FX, Kays R, Brito J. A pilot study on the home range and movement patterns of the Andean Fox Lycalopex culpaeus (Molina, 1782) in Cotopaxi National Park, Ecuador. MAMMALIA 2021. [DOI: 10.1515/mammalia-2020-0195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
This study reports movement patterns and home range estimates of an Andean fox (Lycalopex culpaeus) in Cotopaxi National Park in Ecuador, representing the first GPS-tagging of the species. The GPS functioned well during the 197-day tracking period. Home range sizes ranged between 4.9 and 8.1 km2, depending on the estimation method. Movement speeds averaged 0.17 km/h at day versus 0.87 km/h at night, and distance traveled averaged 0.23 km at day versus 0.89 km at night. These preliminary results highlight the importance of collecting unbiased, high-quality data which enables an enhanced understanding on mammal behavior and human/animal interaction.
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Affiliation(s)
- Armando Castellanos
- Andean Bear Foundation , Quito , Ecuador
- Instituto Nacional de Biodiversidad (INABIO) , Calle Rumipamba 341 y Av. de Los Shyris , 17-07-8976 , Quito , Ecuador
| | - Francisco X. Castellanos
- Andean Bear Foundation , Quito , Ecuador
- Instituto Nacional de Biodiversidad (INABIO) , Calle Rumipamba 341 y Av. de Los Shyris , 17-07-8976 , Quito , Ecuador
| | - Roland Kays
- North Carolina Museum of Natural Sciences , Raleigh , NC , USA
- Department of Forestry & Environmental Resources , North Carolina State University , Raleigh , NC , USA
| | - Jorge Brito
- Instituto Nacional de Biodiversidad (INABIO) , Calle Rumipamba 341 y Av. de Los Shyris , 17-07-8976 , Quito , Ecuador
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28
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Leighton GRM, Bishop JM, Merondun J, Winterton DJ, O’Riain MJ, Serieys LEK. Hiding in plain sight: risk mitigation by a cryptic carnivore foraging at the urban edge. Anim Conserv 2021. [DOI: 10.1111/acv.12732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gabriella R. M. Leighton
- Department of Biological Sciences Institute for Communities and Wildlife in Africa University of Cape Town Cape Town South Africa
| | - Jacqueline M. Bishop
- Department of Biological Sciences Institute for Communities and Wildlife in Africa University of Cape Town Cape Town South Africa
| | - Justin Merondun
- Division of Evolutionary Biology Faculty of Biology LMU Munich Planegg‐Martinsried Germany
| | | | - M. Justin O’Riain
- Department of Biological Sciences Institute for Communities and Wildlife in Africa University of Cape Town Cape Town South Africa
| | - Laurel E. K. Serieys
- Department of Biological Sciences Institute for Communities and Wildlife in Africa University of Cape Town Cape Town South Africa
- Cape Leopard Trust Cape Town South Africa
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29
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Pretorius M, Distiller GB, Photopoulou T, Kelly CP, O'Riain MJ. African Wild Dog Movement Ecology in a Small Protected Area in South Africa. AFRICAN JOURNAL OF WILDLIFE RESEARCH 2021. [DOI: 10.3957/056.051.0054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Michelle Pretorius
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
| | - Greg B. Distiller
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
| | - Theoni Photopoulou
- Centre for Statistics in Ecology, the Environment and Conservation (SEEC), Department of Statistical Sciences, University of Cape Town, Cape Town, South Africa
| | | | - M. Justin O'Riain
- Institute for Communities and Wildlife in Africa (iCWild), Department of Biological Sciences, University of Cape Town, Cape Town, South Africa
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30
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Johnson MA, Kamath A, Kirby R, Fresquez CC, Wang S, Stehle CM, Templeton AR, Losos JB. What Determines Paternity in Wild Lizards? A Spatiotemporal Analysis of Behavior and Morphology. Integr Comp Biol 2021; 61:634-642. [PMID: 34077526 DOI: 10.1093/icb/icab115] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Mating behavior in animals can be understood as a sequence of events that begins with individuals encountering one another and ends with the production of offspring. Behavioral descriptions of animal interactions characterize early elements of this sequence, and genetic descriptions use offspring parentage to characterize the final outcome, with behavioral and physiological assessments of mates and mechanisms of copulation and fertilization comprising intermediate steps. However, behavioral and genetic descriptions of mating systems are often inconsistent with one another, complicating expectations for crucial aspects of mating biology, such as the presence of multiple mating. Here, we use behavioral and genetic data from a wild population of the lizard Anolis cristatellus to characterize female multiple mating and the potential for sexual selection through female mate choice in this species. We find that 48% of sampled females bore offspring sired by multiple males. Moreover, spatiotemporal proximity between males and females was associated with whether a male sired a female's offspring, and if yes, how many offspring he sired. Additionally, male body size, but not display behavior, was associated with reproductive outcomes for male-female pairs. While much remains to be learned about the mechanisms of mating and targets of sexual selection in A. cristatellus, it is clear that female multiple mating is a substantial component of this species' mating system in nature.
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Affiliation(s)
- Michele A Johnson
- Department of Biology, Trinity University, San Antonio, TX 78212, USA
| | - Ambika Kamath
- Miller Institute for Basic Research in Science, University of California, Berkeley, CA 94720, USA
| | - Rebecca Kirby
- U.S. Fish and Wildlife Service, 2800 Cottage Way, Sacramento, CA 95825, USA
| | - Carla C Fresquez
- University of California, Davis, Sustainability, Davis, CA 95616, USA
| | - Su Wang
- Movement Specialists Physical Therapy, Costa Mesa, CA 92627, USA
| | - Chelsea M Stehle
- Department of Biology, Trinity University, San Antonio, TX 78212, USA
| | - Alan R Templeton
- Department of Biology, Washington University, St. Louis, MO 63130, USA
| | - Jonathan B Losos
- Department of Biology, Washington University, St. Louis, MO 63130, USA
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Malishev M, Kramer-Schadt S. Movement, models, and metabolism: Individual-based energy budget models as next-generation extensions for predicting animal movement outcomes across scales. Ecol Modell 2021. [DOI: 10.1016/j.ecolmodel.2020.109413] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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32
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Yang A, Schlichting P, Wight B, Anderson WM, Chinn SM, Wilber MQ, Miller RS, Beasley JC, Boughton RK, VerCauteren KC, Wittemyer G, Pepin KM. Effects of social structure and management on risk of disease establishment in wild pigs. J Anim Ecol 2021; 90:820-833. [PMID: 33340089 DOI: 10.1111/1365-2656.13412] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 11/16/2020] [Indexed: 11/29/2022]
Abstract
Contact heterogeneity among hosts determines invasion and spreading dynamics of infectious disease, thus its characterization is essential for identifying effective disease control strategies. Yet, little is known about the factors shaping contact networks in many wildlife species and how wildlife management actions might affect contact networks. Wild pigs in North America are an invasive, socially structured species that pose a health concern for domestic swine given their ability to transmit numerous devastating diseases such as African swine fever (ASF). Using proximity loggers and GPS data from 48 wild pigs in Florida and South Carolina, USA, we employed a probabilistic framework to estimate weighted contact networks. We determined the effects of sex, social group and spatial distribution (monthly home-range overlap and distance) on wild pig contact. We also estimated the impacts of management-induced perturbations on contact and inferred their effects on ASF establishment in wild pigs with simulation. Social group membership was the primary factor influencing contacts. Between-group contacts depended primarily on space use characteristics, with fewer contacts among groups separated by >2 km and no contacts among groups >4 km apart within a month. Modelling ASF dynamics on the contact network demonstrated that indirect contacts resulting from baiting (a typical method of attracting wild pigs or game species to a site to enhance recreational hunting) increased the risk of disease establishment by ~33% relative to direct contact. Low-intensity population reduction (<5.9% of the population) had no detectable impact on contact structure but reduced predicted ASF establishment risk relative to no population reduction. We demonstrate an approach for understanding the relative role of spatial, social and individual-level characteristics in shaping contact networks and predicting their effects on disease establishment risk, thus providing insight for optimizing disease control in spatially and socially structured wildlife species.
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Affiliation(s)
- Anni Yang
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, USA.,National Wildlife Research Center, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA
| | - Peter Schlichting
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources, University of Georgia, Aiken, SC, USA
| | - Bethany Wight
- Wildlife Ecology and Conservation, Range Cattle Research and Education Center, University of Florida, Ona, FL, USA
| | - Wesley M Anderson
- Wildlife Ecology and Conservation, Range Cattle Research and Education Center, University of Florida, Ona, FL, USA
| | - Sarah M Chinn
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources, University of Georgia, Aiken, SC, USA
| | - Mark Q Wilber
- Ecology, Evolution and Marine Biology, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Ryan S Miller
- Center for Epidemiology and Animal Health, United States Department of Agriculture, Animal and Plant Health Inspection Service, Veterinary Service, Fort Collins, CO, USA
| | - James C Beasley
- Savannah River Ecology Laboratory, Warnell School of Forestry and Natural Resources, University of Georgia, Aiken, SC, USA
| | - Raoul K Boughton
- Wildlife Ecology and Conservation, Range Cattle Research and Education Center, University of Florida, Ona, FL, USA
| | - Kurt C VerCauteren
- National Wildlife Research Center, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA
| | - George Wittemyer
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO, USA
| | - Kim M Pepin
- National Wildlife Research Center, United States Department of Agriculture, Animal and Plant Health Inspection Service, Fort Collins, CO, USA
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33
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Van Belle S, Porter AM, Fernandez-Duque E, Di Fiore A. Ranging behavior and the potential for territoriality in pair-living titi monkeys (Plecturocebus discolor). Am J Primatol 2020; 83:e23225. [PMID: 33368565 DOI: 10.1002/ajp.23225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 11/23/2020] [Accepted: 12/13/2020] [Indexed: 12/13/2022]
Abstract
Patterns of ranging behavior and space use are key for evaluating current ideas about the evolution and maintenance of pair-living and sexual monogamy as they provide insights into the dispersion of females, the potential for territoriality, and whether males are limited to defending an area that can support only one female and her offspring. We examined ranging behavior and space use to evaluate the potential for territoriality in five groups of red titi monkeys (Plecturocebus discolor) during a 10-year study in Ecuadorian Amazonia. Mean home range size, calculated using a time-sensitive local convex hull estimation procedure, was 4.0 ± 1.4 ha. Annual home ranges of neighboring groups overlapped, on average, 0%-7%. Mean daily path length was 670 ± 194 m, resulting in defendability indices of 2.2-3.6 across groups. Groups visited, on average, 4 of 12 sections of their home range border area per day, but that was not more often than would be expected by chance, and intergroup encounters were infrequent. We did not find evidence of active monitoring for intruders in border areas, in that groups did not travel either faster or slower when at the border than when in central areas of their range. The absence of overt monitoring might be compensated for by engaging in loud calls, which the study groups did throughout their home ranges; these calls may serve as an advertisement of occupancy and a deterrent to intruding conspecifics. Our finding that red titis have a high potential for territoriality is consistent with several of the main hypotheses proposed to explain pair-living in mammals.
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Affiliation(s)
- Sarie Van Belle
- Department of Anthropology and Primate Molecular Ecology and Evolution Laboratory, The University of Texas at Austin, Austin, Texas, USA
| | - Amy M Porter
- Department of Anthropology, University of California Davis, Davis, California, USA
| | - Eduardo Fernandez-Duque
- Department of Anthropology and School of the Environment, Yale University, New Haven, Connecticut, USA.,Facultad de Recursos Naturales, Universidad Nacional de Formosa, Formosa, Argentina.,College of Biological and Environmental Sciences, Universidad San Francisco de Quito, Cumbayá, Ecuador
| | - Anthony Di Fiore
- Department of Anthropology and Primate Molecular Ecology and Evolution Laboratory, The University of Texas at Austin, Austin, Texas, USA.,College of Biological and Environmental Sciences, Universidad San Francisco de Quito, Cumbayá, Ecuador
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Chatzidiakou L, Krause A, Han Y, Chen W, Yan L, Popoola OAM, Kellaway M, Wu Y, Liu J, Hu M, Barratt B, Kelly FJ, Zhu T, Jones RL. Using low-cost sensor technologies and advanced computational methods to improve dose estimations in health panel studies: results of the AIRLESS project. JOURNAL OF EXPOSURE SCIENCE & ENVIRONMENTAL EPIDEMIOLOGY 2020; 30:981-989. [PMID: 32788611 DOI: 10.1038/s41370-020-0259-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Air pollution epidemiology has primarily relied on fixed outdoor air quality monitoring networks and static populations. METHODS Taking advantage of recent advancements in sensor technologies and computational techniques, this paper presents a novel methodological approach that improves dose estimations of multiple air pollutants in large-scale health studies. We show the results of an intensive field campaign that measured personal exposures to gaseous pollutants and particulate matter of a health panel of 251 participants residing in urban and peri-urban Beijing with 60 personal air quality monitors (PAMs). Outdoor air pollution measurements were collected in monitoring stations close to the participants' residential addresses. Based on parameters collected with the PAMs, we developed an advanced computational model that automatically classified time-activity-location patterns of each individual during daily life at high spatial and temporal resolution. RESULTS Applying this methodological approach in two established cohorts, we found substantial differences between doses estimated from outdoor and personal air quality measurements. The PAM measurements also significantly reduced the correlation between pollutant species often observed in static outdoor measurements, reducing confounding effects. CONCLUSIONS Future work will utilise these improved dose estimations to investigate the underlying mechanisms of air pollution on cardio-pulmonary health outcomes using detailed medical biomarkers in a way that has not been possible before.
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Affiliation(s)
- Lia Chatzidiakou
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK.
| | - Anika Krause
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Yiqun Han
- MRC Centre for Environment & Health, Imperial College London and King's College London, London, UK
- College of Environmental Sciences and Engineering, Peking University, 100871, Beijing, China
- Department of Analytical, Environmental and Forensic Sciences, King's College London, London, SE1 9NH, UK
| | - Wu Chen
- College of Environmental Sciences and Engineering, Peking University, 100871, Beijing, China
| | - Li Yan
- MRC Centre for Environment & Health, Imperial College London and King's College London, London, UK
- Department of Analytical, Environmental and Forensic Sciences, King's College London, London, SE1 9NH, UK
| | | | | | - Yangfeng Wu
- Peking University Clinical Research Institute, 100191, Beijing, China
| | - Jing Liu
- Institute of Heart, Lung and Blood Vessel Diseases, Beijing Anzhen Hospital, Capital Medical University, 100029, Beijing, China
| | - Min Hu
- College of Environmental Sciences and Engineering, Peking University, 100871, Beijing, China
- The Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, 100871, Beijing, China
| | - Ben Barratt
- MRC Centre for Environment & Health, Imperial College London and King's College London, London, UK
- Department of Analytical, Environmental and Forensic Sciences, King's College London, London, SE1 9NH, UK
- NIHR Health Protection Research Unit in Health Impact of Environmental Hazards, King's College London, London, SE1 9NH, UK
| | - Frank J Kelly
- MRC Centre for Environment & Health, Imperial College London and King's College London, London, UK
- Department of Analytical, Environmental and Forensic Sciences, King's College London, London, SE1 9NH, UK
- NIHR Health Protection Research Unit in Health Impact of Environmental Hazards, King's College London, London, SE1 9NH, UK
| | - Tong Zhu
- College of Environmental Sciences and Engineering, Peking University, 100871, Beijing, China
- The Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University, 100871, Beijing, China
| | - Roderic L Jones
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
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Marshal JP, D'ammando G, Parrini F. Seasonal Habitat Selection by Eland in an Insular Nature Reserve. AFRICAN JOURNAL OF WILDLIFE RESEARCH 2020. [DOI: 10.3957/056.050.0132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Jason P. Marshal
- Centre for African Ecology, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 South Africa
| | - Giacomo D'ammando
- Centre for African Ecology, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 South Africa
| | - Francesca Parrini
- Centre for African Ecology, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050 South Africa
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36
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Michel CJ, Henderson MJ, Loomis CM, Smith JM, Demetras NJ, Iglesias IS, Lehman BM, Huff DD. Fish predation on a landscape scale. Ecosphere 2020. [DOI: 10.1002/ecs2.3168] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Cyril J. Michel
- NOAA‐SWFSC Fisheries Ecology Division/UC Santa Cruz 110 McAllister Way Santa Cruz California95060USA
| | - Mark J. Henderson
- U.S. Geological Survey Cooperative Fish and Wildlife Research Unit 1 Harpst Street Arcata California95521USA
- Humboldt State University 1 Harpst Street Arcata California95521USA
| | | | - Joseph M. Smith
- NOAA‐NWFSC Fish Ecology Division 2725 Montlake Boulevard East Seattle Washington98112USA
| | - Nicholas J. Demetras
- NOAA‐SWFSC Fisheries Ecology Division/UC Santa Cruz 110 McAllister Way Santa Cruz California95060USA
| | - Ilysa S. Iglesias
- NOAA‐SWFSC Fisheries Ecology Division/UC Santa Cruz 110 McAllister Way Santa Cruz California95060USA
| | - Brendan M. Lehman
- NOAA‐SWFSC Fisheries Ecology Division/UC Santa Cruz 110 McAllister Way Santa Cruz California95060USA
| | - David D. Huff
- NOAA‐NWFSC Fish Ecology Division Newport Research Station Bldg. 955, 2032 S.E. OSU Drive Newport Oregon97365USA
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Movement patterns of free-roaming dogs on heterogeneous urban landscapes: Implications for rabies control. Prev Vet Med 2020; 178:104978. [PMID: 32302776 DOI: 10.1016/j.prevetmed.2020.104978] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 02/07/2020] [Accepted: 03/24/2020] [Indexed: 12/25/2022]
Abstract
In 2015, a case of canine rabies in Arequipa, Peru indicated the re-emergence of rabies virus in the city. Despite mass dog vaccination campaigns across the city and reactive ring vaccination and other control activities around positive cases (e.g. elimination of unowned dogs), the outbreak has spread. Here we explore how the urban landscape of Arequipa affects the movement patterns of free-roaming dogs, the main reservoirs of the rabies virus in the area. We tracked 23 free-roaming dogs using Global Positioning System (GPS) collars. We analyzed the spatio-temporal GPS data using the time- local convex hull method. Dog movement patterns varied across local environments. We found that water channels, an urban feature of Arequipa that are dry most of the year, promote movement. Dogs that used the water channels extensively move on average 7 times further (p = 0.002) and 1.2 times more directionally (p = 0.027) than dogs that do not use the water channels at all. They were also 1.3 times faster on average, but this difference was not statistically significant (p = 0.197). Our findings suggest that water channels can be used by dogs as 'highways' to transverse the city and have the potential to spread disease far beyond the radius of control practices. Control efforts should focus on a robust vaccination campaign attuned to the geography of the city, and not limited to small-scale rings surrounding cases.
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Dinh ETN, Cauvin A, Orange JP, Shuman RM, Wisely SM, Blackburn JK. Living la Vida T-LoCoH: site fidelity of Florida ranched and wild white-tailed deer ( Odocoileus virginianus) during the epizootic hemorrhagic disease virus (EHDV) transmission period. MOVEMENT ECOLOGY 2020; 8:14. [PMID: 32257219 PMCID: PMC7076934 DOI: 10.1186/s40462-020-00200-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Accepted: 03/09/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Epizootic hemorrhagic disease virus (EHDV) is a pathogen vectored by Culicoides midges that causes significant economic loss in the cervid farming industry and affects wild deer as well. Despite this, its ecology is poorly understood. Studying movement and space use by ruminant hosts during the transmission season may elucidate EHDV ecology by identifying behaviors that can increase exposure risk. Here we compared home ranges (HRs) and site fidelity metrics within HRs using the T-LoCoH R package and GPS data from collared deer. METHODS Here, we tested whether white-tailed deer (Odocoileus virginianus) roaming within a high-fenced, private deer farm (ranched) and native deer from nearby state-managed properties (wild) exhibited differences in home range (HR) size and usage during the 2016 and 2017 EHDV seasons. We captured male and female individuals in both years and derived seasonal HRs for both sexes and both groups for each year. HRs were calculated using a time-scale distance approach in T-LoCoH. We then derived revisitation and duration of visit metrics and compared between years, sexes, and ranched and wild deer. RESULTS We found that ranched deer of both sexes tended to have smaller activity spaces (95% HR) and revisited sites within their HR more often but stayed for shorter periods than wild deer. However, core area (25% HR) sizes did not significantly differ between these groups. CONCLUSIONS The contrast in our findings between wild and ranched deer suggest that home range usage, rather than size, in addition to differences in population density, likely drive differences in disease exposure during the transmission period.
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Affiliation(s)
- Emily T. N. Dinh
- Spatial Epidemiology & Ecology Research Laboratory, Department of Geography, University of Florida, Gainesville, FL USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL USA
| | - Allison Cauvin
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL USA
| | - Jeremy P. Orange
- Spatial Epidemiology & Ecology Research Laboratory, Department of Geography, University of Florida, Gainesville, FL USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL USA
| | - Rebecca M. Shuman
- Florida Fish and Wildlife Conservation Commission, Gainesville, FL USA
| | - Samantha M. Wisely
- Department of Wildlife Ecology and Conservation, University of Florida, Gainesville, FL USA
| | - Jason K. Blackburn
- Spatial Epidemiology & Ecology Research Laboratory, Department of Geography, University of Florida, Gainesville, FL USA
- Emerging Pathogens Institute, University of Florida, Gainesville, FL USA
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Lidgard DC, Bowen WD, Iverson SJ. Sex-differences in fine-scale home-range use in an upper-trophic level marine predator. MOVEMENT ECOLOGY 2020; 8:11. [PMID: 32082578 PMCID: PMC7020581 DOI: 10.1186/s40462-020-0196-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/05/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND The distribution of prey in the ocean is spatially and temporally patchy. How predators respond to this prey patchiness may have consequences on their foraging success, and thus physical condition. The recent ability to record fine-scale movements of marine animals combined with novel home-range analyses that incorporate the dimension of time should permit a better understanding of how individuals utilise different regions of space and the consequences on their foraging success. METHODS Over a six-year study, we used T-LoCoH (Time-Local Convex Hull) home-range software to model archival GPS (Global Positioning System) data from 81 grey seals to investigate the fine-scale spatio-temporal use of space and the distribution of apparent foraging effort. Regions of home-ranges were classified according to the frequency of return visits (site fidelity) and duration of visits (intensity of use). Generalized linear mixed -effects models were used to test hypotheses on seasonal changes in foraging distribution and behaviour and the role of space-use and state on determining foraging success. RESULTS Male grey seals had larger home-ranges and core areas than females, and both sexes showed a contraction in home-range and core area in fall leading up to the breeding season compared with summer. Heavier individuals had smaller core areas than lighter ones, suggesting access to higher quality habitat might be limited to those individuals with greater foraging experience and competitive ability. The size of the home-range or core area was not an important predictor of the rate of mass gain. A fine-scale spatio-temporal analysis of habitat use within the home-range provided evidence of intra-annual site fidelity at presumed foraging locations, suggesting predictably in prey distribution. Neither sex nor season were useful predictors for classifying behaviour. Rather, individual identity explained much of the variation in fine-scale behaviour. CONCLUSIONS Understanding how upper-trophic level marine predators use space provides opportunities to explore the consequences of variation in foraging tactics and their success on fitness. Having knowledge of the drivers that shape this intraspecific variation can contribute toward predicting how these predators may respond to both natural and man-made environmental forcing.
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Affiliation(s)
- D. C. Lidgard
- Department of Biology, Dalhousie University, B3H 4J1, Halifax, Nova Scotia Canada
- Population Ecology Division, Bedford Institute of Oceanography, Department of Fisheries and Oceans, Dartmouth, Nova Scotia B2Y 4A2 Canada
| | - W. D. Bowen
- Population Ecology Division, Bedford Institute of Oceanography, Department of Fisheries and Oceans, Dartmouth, Nova Scotia B2Y 4A2 Canada
| | - S. J. Iverson
- Department of Biology, Dalhousie University, B3H 4J1, Halifax, Nova Scotia Canada
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Joo R, Boone ME, Clay TA, Patrick SC, Clusella-Trullas S, Basille M. Navigating through the r packages for movement. J Anim Ecol 2019; 89:248-267. [PMID: 31587257 DOI: 10.1111/1365-2656.13116] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 09/23/2019] [Indexed: 11/28/2022]
Abstract
The advent of miniaturized biologging devices has provided ecologists with unprecedented opportunities to record animal movement across scales, and led to the collection of ever-increasing quantities of tracking data. In parallel, sophisticated tools have been developed to process, visualize and analyse tracking data; however, many of these tools have proliferated in isolation, making it challenging for users to select the most appropriate method for the question in hand. Indeed, within the r software alone, we listed 58 packages created to deal with tracking data or 'tracking packages'. Here, we reviewed and described each tracking package based on a workflow centred around tracking data (i.e. spatio-temporal locations (x, y, t)), broken down into three stages: pre-processing, post-processing and analysis, the latter consisting of data visualization, track description, path reconstruction, behavioural pattern identification, space use characterization, trajectory simulation and others. Supporting documentation is key to render a package accessible for users. Based on a user survey, we reviewed the quality of packages' documentation and identified 11 packages with good or excellent documentation. Links between packages were assessed through a network graph analysis. Although a large group of packages showed some degree of connectivity (either depending on functions or suggesting the use of another tracking package), one third of the packages worked in isolation, reflecting a fragmentation in the r movement-ecology programming community. Finally, we provide recommendations for users when choosing packages, and for developers to maximize the usefulness of their contribution and strengthen the links within the programming community.
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Affiliation(s)
- Rocío Joo
- Department of Wildlife Ecology and Conservation, Fort Lauderdale Research and Education Center, University of Florida, Fort Lauderdale, FL, USA
| | - Matthew E Boone
- Department of Wildlife Ecology and Conservation, Fort Lauderdale Research and Education Center, University of Florida, Fort Lauderdale, FL, USA
| | - Thomas A Clay
- School of Environmental Sciences, University of Liverpool, Liverpool, UK
| | - Samantha C Patrick
- School of Environmental Sciences, University of Liverpool, Liverpool, UK
| | - Susana Clusella-Trullas
- Department of Botany and Zoology and Centre for Invasion Biology, Stellenbosch University, Stellenbosch, South Africa
| | - Mathieu Basille
- Department of Wildlife Ecology and Conservation, Fort Lauderdale Research and Education Center, University of Florida, Fort Lauderdale, FL, USA
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Spatial ecology of male hippopotamus in a changing watershed. Sci Rep 2019; 9:15392. [PMID: 31659224 PMCID: PMC6817855 DOI: 10.1038/s41598-019-51845-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Accepted: 10/05/2019] [Indexed: 02/07/2023] Open
Abstract
The obligate dependency of the common hippopotamus, Hippopotamus amphibius, on water makes them particularly vulnerable to hydrological disturbances. Despite the threats facing this at-risk species, there is a lack of information regarding H. amphibius spatial ecology. We used high-resolution tracking data of male H. amphibius to assess home range size, movement mode (e.g. residency and migratory movements), and resource selection patterns. We compared these results across seasons to understand how hydrological variability influences H. amphibius movement. Our study watershed has been severely impacted by anthropogenic water abstraction causing the river to stop flowing for prolonged periods. We observed H. amphibius movements to be highly constrained to the river course with grassy floodplains being their preferred habitat. Dominant and small sub-adult males displayed year-round residency in/near river pools and had smaller home ranges compared to large sub-adults. During the dry season, large sub-adult males made significant (~15 km) upstream movements. The larger home range size of large sub-adults can be attributed to the elevated levels of migratory and exploratory activities to limit conspecific aggression as the river dries. Our observations provide insight into how future changes in water flow may influence male H. amphibius movements and populations through density-dependent effects.
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Wittemyer G, Northrup JM, Bastille-Rousseau G. Behavioural valuation of landscapes using movement data. Philos Trans R Soc Lond B Biol Sci 2019; 374:20180046. [PMID: 31352884 PMCID: PMC6710572 DOI: 10.1098/rstb.2018.0046] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/19/2019] [Indexed: 11/12/2022] Open
Abstract
Wildlife tracking is one of the most frequently employed approaches to monitor and study wildlife populations. To date, the application of tracking data to applied objectives has focused largely on the intensity of use by an animal in a location or the type of habitat. While this has provided valuable insights and advanced spatial wildlife management, such interpretation of tracking data does not capture the complexity of spatio-temporal processes inherent to animal behaviour and represented in the movement path. Here, we discuss current and emerging approaches to estimate the behavioural value of spatial locations using movement data, focusing on the nexus of conservation behaviour and movement ecology that can amplify the application of animal tracking research to contemporary conservation challenges. We highlight the importance of applying behavioural ecological approaches to the analysis of tracking data and discuss the utility of comparative approaches, optimization theory and economic valuation to gain understanding of movement strategies and gauge population-level processes. First, we discuss innovations in the most fundamental movement-based valuation of landscapes, the intensity of use of a location, namely dissecting temporal dynamics in and means by which to weight the intensity of use. We then expand our discussion to three less common currencies for behavioural valuation of landscapes, namely the assessment of the functional (i.e. what an individual is doing at a location), structural (i.e. how a location relates to use of the broader landscape) and fitness (i.e. the return from using a location) value of a location. Strengthening the behavioural theoretical underpinnings of movement ecology research promises to provide a deeper, mechanistic understanding of animal movement that can lead to unprecedented insights into the interaction between landscapes and animal behaviour and advance the application of movement research to conservation challenges. This article is part of the theme issue 'Linking behaviour to dynamics of populations and communities: application of novel approaches in behavioural ecology to conservation'.
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Affiliation(s)
- George Wittemyer
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO 80523, USA
| | - Joseph M. Northrup
- Wildlife Research and Monitoring Section, Ontario Ministry of Natural Resources and Forestry, Peterborough, Ontario, Canada K9J 8M5
- Environmental and Life Sciences Graduate Program, Trent University, Peterborough, Ontario, Canada
| | - Guillaume Bastille-Rousseau
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, CO 80523, USA
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French JT, O'Shaughnessy R, Harveson LA, Warnock BJ, Garrison TO, Gray SS. SELECTION OF ECOLOGICAL SITES BY PRONGHORN IN TRANS-PECOS REGION OF TEXAS. SOUTHWEST NAT 2019. [DOI: 10.1894/0038-4909-63-2-96] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Justin T. French
- Borderlands Research Institute, Sul Ross State University, Alpine, TX 79830 (JTF, RO, LAH, BJW, TOG) Texas Parks and Wildlife Department, Alpine, TX 79830 (SSG)
| | - Ryan O'Shaughnessy
- Borderlands Research Institute, Sul Ross State University, Alpine, TX 79830 (JTF, RO, LAH, BJW, TOG) Texas Parks and Wildlife Department, Alpine, TX 79830 (SSG)
| | - Louis A. Harveson
- Borderlands Research Institute, Sul Ross State University, Alpine, TX 79830 (JTF, RO, LAH, BJW, TOG) Texas Parks and Wildlife Department, Alpine, TX 79830 (SSG)
| | - Bonnie J. Warnock
- Borderlands Research Institute, Sul Ross State University, Alpine, TX 79830 (JTF, RO, LAH, BJW, TOG) Texas Parks and Wildlife Department, Alpine, TX 79830 (SSG)
| | - Taylor O. Garrison
- Borderlands Research Institute, Sul Ross State University, Alpine, TX 79830 (JTF, RO, LAH, BJW, TOG) Texas Parks and Wildlife Department, Alpine, TX 79830 (SSG)
| | - Shawn S. Gray
- Borderlands Research Institute, Sul Ross State University, Alpine, TX 79830 (JTF, RO, LAH, BJW, TOG) Texas Parks and Wildlife Department, Alpine, TX 79830 (SSG)
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Blackburn JK, Ganz HH, Ponciano JM, Turner WC, Ryan SJ, Kamath P, Cizauskas C, Kausrud K, Holt RD, Stenseth NC, Getz WM. Modeling R₀ for Pathogens with Environmental Transmission: Animal Movements, Pathogen Populations, and Local Infectious Zones. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E954. [PMID: 30884913 PMCID: PMC6466347 DOI: 10.3390/ijerph16060954] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Revised: 03/04/2019] [Accepted: 03/07/2019] [Indexed: 01/24/2023]
Abstract
How a disease is transmitted affects our ability to determine R₀, the average number of new cases caused by an infectious host at the onset of an epidemic. R₀ becomes progressively more difficult to compute as transmission varies from directly transmitted diseases to diseases that are vector-borne to environmentally transmitted diseases. Pathogens responsible for diseases with environmental transmission are typically maintained in environmental reservoirs that exhibit a complex spatial distribution of local infectious zones (LIZs). Understanding host encounters with LIZs and pathogen persistence within LIZs is required for an accurate R₀ and modeling these contacts requires an integrated geospatial and dynamical systems approach. Here we review how interactions between host and pathogen populations and environmental reservoirs are driven by landscape-level variables, and synthesize the quantitative framework needed to formulate outbreak response and disease control.
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Affiliation(s)
- Jason K Blackburn
- Spatial Epidemiology and Ecology Research Laboratory, Department of Geography, University of Florida, 3141 Turlington Hall, Gainesville, FL 32611, USA.
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Road, Gainesville, FL 32611, USA.
| | - Holly H Ganz
- Davis Genome Center, University of California, 451 Health Sciences Dr., Davis, CA 95616, USA.
| | | | - Wendy C Turner
- Department of Biological Sciences, State University of New York, 1400 Washington Avenue, Albany, NY 12222, USA.
| | - Sadie J Ryan
- Emerging Pathogens Institute, University of Florida, 2055 Mowry Road, Gainesville, FL 32611, USA.
- Quantitative Disease Ecology & Conservation Lab, Department of Geography, University of Florida, 3141 Turlington Hall, Gainesville, FL 32611, USA.
- School of Life Sciences, University of KwaZulu-Natal, Durban 4041, South Africa.
| | - Pauline Kamath
- School of Food and Agriculture, University of Maine, 5763 Rogers Hall, Room 210, Orono, ME 04469, USA.
| | - Carrie Cizauskas
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, 130 Mulford Hall, Berkeley, CA 94720, USA.
| | - Kyrre Kausrud
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, 0361 Oslo, Norway.
| | - Robert D Holt
- Department of Biology, University of Florida, Gainesville, FL 32611, USA.
| | - Nils Chr Stenseth
- Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, P.O. Box 1066 Blindern, 0361 Oslo, Norway.
| | - Wayne M Getz
- School of Food and Agriculture, University of Maine, 5763 Rogers Hall, Room 210, Orono, ME 04469, USA.
- School of Mathematical Sciences, University of KwaZulu-Natal, Durban 4041, South Africa.
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Briers-Louw WD, Verschueren S, Leslie AJ. Big Cats Return to Majete Wildlife Reserve, Malawi: Evaluating Reintroduction Success. AFRICAN JOURNAL OF WILDLIFE RESEARCH 2019. [DOI: 10.3957/056.049.0034] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Affiliation(s)
- Willem D. Briers-Louw
- Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch, 7602 South Africa
| | | | - Alison J. Leslie
- Department of Conservation Ecology and Entomology, Stellenbosch University, Private Bag X1, Matieland, Stellenbosch, 7602 South Africa
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Noonan MJ, Tucker MA, Fleming CH, Akre TS, Alberts SC, Ali AH, Altmann J, Antunes PC, Belant JL, Beyer D, Blaum N, Böhning‐Gaese K, Cullen L, Paula RC, Dekker J, Drescher‐Lehman J, Farwig N, Fichtel C, Fischer C, Ford AT, Goheen JR, Janssen R, Jeltsch F, Kauffman M, Kappeler PM, Koch F, LaPoint S, Markham AC, Medici EP, Morato RG, Nathan R, Oliveira‐Santos LGR, Olson KA, Patterson BD, Paviolo A, Ramalho EE, Rösner S, Schabo DG, Selva N, Sergiel A, Xavier da Silva M, Spiegel O, Thompson P, Ullmann W, Zięba F, Zwijacz‐Kozica T, Fagan WF, Mueller T, Calabrese JM. A comprehensive analysis of autocorrelation and bias in home range estimation. ECOL MONOGR 2019. [DOI: 10.1002/ecm.1344] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Michael J. Noonan
- Smithsonian Conservation Biology Institute National Zoological Park 1500 Remount Road Front Royal Virginia 22630 USA
- Department of Biology University of Maryland College Park Maryland 20742 USA
| | - Marlee A. Tucker
- Senckenberg Biodiversity and Climate Research Centre Senckenberg Gesellschaft für Naturforschung Senckenberganlage 25 60325 Frankfurt (Main) Germany
- Department of Biological Sciences Goethe University Max‐von‐Laue‐Straße 9 60438 Frankfurt (Main) Germany
| | - Christen H. Fleming
- Smithsonian Conservation Biology Institute National Zoological Park 1500 Remount Road Front Royal Virginia 22630 USA
- Department of Biology University of Maryland College Park Maryland 20742 USA
| | - Thomas S. Akre
- Smithsonian Conservation Biology Institute National Zoological Park 1500 Remount Road Front Royal Virginia 22630 USA
| | - Susan C. Alberts
- Departments of Biology and Evolutionary Anthropology Duke University Durham North Carolina 27708 USA
| | | | - Jeanne Altmann
- Department of Ecology and Evolution Princeton University Princeton New Jersey 08544 USA
| | - Pamela Castro Antunes
- Department of Ecology Federal University of Mato Grosso do Sul Campo Grande MS 79070‐900 Brazil
| | - Jerrold L. Belant
- Camp Fire Program in Wildlife Conservation College of Environmental Science and Forestry State University of New York Syracuse New York 13210 USA
| | - Dean Beyer
- Conservation Ecology Faculty of Biology Philipps‐University Marburg Karl‐von‐Frisch Straße 8 Marburg D‐35043 Germany
| | - Niels Blaum
- Plant Ecology and Nature Conservation University of Potsdam Am Mühlenberg 3 14476 Potsdam Germany
| | - Katrin Böhning‐Gaese
- Senckenberg Biodiversity and Climate Research Centre Senckenberg Gesellschaft für Naturforschung Senckenberganlage 25 60325 Frankfurt (Main) Germany
- Department of Biological Sciences Goethe University Max‐von‐Laue‐Straße 9 60438 Frankfurt (Main) Germany
| | - Laury Cullen
- Instituto de Pesquisas Ecológicas Nazare Paulista Rod. Dom Pedro I, km 47 Caixa Postal 47 ‐ 12960‐000 Nazaré Paulista SP Brazil
| | - Rogerio Cunha Paula
- National Research Center for Carnivores Conservation Chico Mendes Institute for the Conservation of Biodiversity Estrada Municipal Hisaichi Takebayashi 8600 Atibaia SP 12952‐011 Brazil
| | - Jasja Dekker
- Jasja Dekker Dierecologie Enkhuizenstraat 26 6843 WZ Arnhem The Netherlands
| | - Jonathan Drescher‐Lehman
- Smithsonian Conservation Biology Institute National Zoological Park 1500 Remount Road Front Royal Virginia 22630 USA
- Department of Biology George Mason University 4400 University Drive Fairfax Virginia 22030 USA
| | - Nina Farwig
- Michigan Department of Natural Resources 1990 U.S. 41 South Marquette Michigan 49855 USA
| | - Claudia Fichtel
- Behavioral Ecology & Sociobiology Unit German Primate Center Kellnerweg 4 37077 Göttingen Germany
| | - Christina Fischer
- Restoration Ecology Department of Ecology and Ecosystem Management Technische Universität München Emil‐Ramann‐Straße 6 85354 Freising Germany
| | - Adam T. Ford
- Department of Biology University of British Columbia 1177 Research Road Kelowna British Columbia V1V 1V7 Canada
| | - Jacob R. Goheen
- Department of Zoology and Physiology University of Wyoming Laramie Wyoming 82071 USA
| | - René Janssen
- Bionet Natuuronderzoek Valderstraat 39 6171EL Stein The Netherlands
| | - Florian Jeltsch
- Plant Ecology and Nature Conservation University of Potsdam Am Mühlenberg 3 14476 Potsdam Germany
| | - Matthew Kauffman
- U.S. Geological Survey Wyoming Cooperative Fish and Wildlife Research Unit Department of Zoology and Physiology University of Wyoming Laramie Wyoming 82071 USA
| | - Peter M. Kappeler
- Behavioral Ecology & Sociobiology Unit German Primate Center Kellnerweg 4 37077 Göttingen Germany
| | - Flávia Koch
- Behavioral Ecology & Sociobiology Unit German Primate Center Kellnerweg 4 37077 Göttingen Germany
| | - Scott LaPoint
- Max Planck Institute for Ornithology, Vogelwarte Radolfzell Am Obstberg 1 D‐78315 Radolfzell Germany
- Lamont‐Doherty Earth Observatory Columbia University Palisades New York 10964 USA
| | - A. Catherine Markham
- Department of Anthropology Stony Brook University Stony Brook New York 11794 USA
| | - Emilia Patricia Medici
- Lowland Tapir Conservation Initiative (LTCI) Instituto de Pesquisas Ecologicas (IPE) & IUCN SSC Tapir Specialist Group (TSG) Rua Licuala 622, Damha 1, CEP: 79046‐150 Campo Grande Mato Grosso do Sul Brazil
| | - Ronaldo G. Morato
- National Research Center for Carnivores Conservation Chico Mendes Institute for the Conservation of Biodiversity Estrada Municipal Hisaichi Takebayashi 8600 Atibaia SP 12952‐011 Brazil
- Institute for the Conservation of Neotropical Carnivores – Pro‐Carnívoros Atibaia SP 12945‐010 Brazil
| | - Ran Nathan
- Movement Ecology Laboratory Department of Ecology, Evolution and Behavior Alexander Silberman Institute of Life Sciences The Hebrew University of Jerusalem Edmond J. Safra Campus Jerusalem 91904 Israel
| | | | - Kirk A. Olson
- Smithsonian Conservation Biology Institute National Zoological Park 1500 Remount Road Front Royal Virginia 22630 USA
- Wildlife Conservation Society Mongolia Program 201 San Business Center Amar Street 29, Small Ring Road, Sukhbaatar District Post 20A, Box‐21 Ulaanbaatar Mongolia
| | - Bruce D. Patterson
- Integrative Research Center Field Museum of Natural History Chicago Illinois 60605 USA
| | - Agustin Paviolo
- Instituto de Biología Subtropical Universidad Nacional de Misiones and CONICET Bertoni 85 3370 Puerto Iguazú Misiones Argentina
| | - Emiliano Esterci Ramalho
- Institute for the Conservation of Neotropical Carnivores – Pro‐Carnívoros Atibaia SP 12945‐010 Brazil
- Instituto de Desenvolvimento Sustentável Mamirauá Estrada do Bexiga, 2.584 Bairro Fonte Boa Caixa Postal 38 69.553‐225 Tefé Amazonas Brazil
| | - Sascha Rösner
- Michigan Department of Natural Resources 1990 U.S. 41 South Marquette Michigan 49855 USA
| | - Dana G. Schabo
- Michigan Department of Natural Resources 1990 U.S. 41 South Marquette Michigan 49855 USA
| | - Nuria Selva
- Institute of Nature Conservation Polish Academy of Sciences Mickiewicza 33 31‐120 Krakow Poland
| | - Agnieszka Sergiel
- Institute of Nature Conservation Polish Academy of Sciences Mickiewicza 33 31‐120 Krakow Poland
| | - Marina Xavier da Silva
- Projeto Carnívoros do Iguaçu Parque Nacional do Iguaçu BR‐469, Km 22.5, CEP 85851‐970 Foz do Iguaçu PR Brazil
| | - Orr Spiegel
- School of Zoology Faculty of Life Sciences Tel Aviv University Tel Aviv 69978 Israel
| | - Peter Thompson
- Department of Biology University of Maryland College Park Maryland 20742 USA
| | - Wiebke Ullmann
- Plant Ecology and Nature Conservation University of Potsdam Am Mühlenberg 3 14476 Potsdam Germany
| | - Filip Zięba
- Tatra National Park Kuźnice 1 34‐500 Zakopane Poland
| | | | - William F. Fagan
- Department of Biology University of Maryland College Park Maryland 20742 USA
| | - Thomas Mueller
- Senckenberg Biodiversity and Climate Research Centre Senckenberg Gesellschaft für Naturforschung Senckenberganlage 25 60325 Frankfurt (Main) Germany
- Department of Biological Sciences Goethe University Max‐von‐Laue‐Straße 9 60438 Frankfurt (Main) Germany
| | - Justin M. Calabrese
- Smithsonian Conservation Biology Institute National Zoological Park 1500 Remount Road Front Royal Virginia 22630 USA
- Department of Biology University of Maryland College Park Maryland 20742 USA
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Moriarty KM, Verschuyl J, Kroll AJ, Davis R, Chapman J, Hollen B. Describing vegetation characteristics used by two rare forest-dwelling species: Will established reserves provide for coastal marten in Oregon? PLoS One 2019; 14:e0210865. [PMID: 30703124 PMCID: PMC6354973 DOI: 10.1371/journal.pone.0210865] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 01/03/2019] [Indexed: 11/18/2022] Open
Abstract
Forest management guidelines for rare or declining species in the Pacific Northwest, USA, include both late successional reserves and specific vegetation management criteria. However, whether current management practices for well-studied species such as northern spotted owls (Strix occidentallis caurina) can aid in conserving a lesser known subspecies-Humboldt martens (Martes caurina humboldtensis)-is unclear. To address the lack of information for martens in coastal Oregon, USA, we quantified vegetation characteristics at locations used by Humboldt martens and spotted owls in two regions (central and southern coast) and at two spatial scales (the site level summarizing extensive vegetation surveys and regionally using remotely sensed vegetation and estimated habitat models). We estimated amount of predicted habitat for both species in established reserves. If predicted overlap in established reserves was low, then we reported vegetation characteristics to inform potential locations for reserves or management opportunities. In the Central Coast, very little overlap existed in vegetation characteristics between Humboldt martens and spotted owls at either the site or regional level. Humboldt martens occurred in young forests composed of small diameter trees with few snags or downed logs. Humboldt martens were also found in areas with very dense vegetation when overstory canopy and shrub cover percentages were combined. In the South Coast, Humboldt martens occurred in forests with smaller diameter trees than spotted owl sites on average. Coastal Humboldt martens may use stands of predicted high quality spotted owl habitat in the Pacific Northwest. Nonetheless, our observations suggest that coastal Humboldt martens exist in areas that include a much higher diversity of conifer size classes as long as extensive dense shrub cover, predominantly in the form of high salal and evergreen huckleberry, are available. We suggest that managers consider how structural characteristics (e.g., downed logs, shrub cover, patch size), are associated with long-term species persistence rather than relying on reserves based on broad cover types. Describing vegetation may partially describe suitability, but available prey or predation risk ultimately influence likelihood of individual Humboldt marten use. Guidelines for diversifying vegetation management, and retaining or restoring appropriate habitat conditions at both the stand level and regionally, may increase management flexibility and identify forest conditions that support both spotted owls and Humboldt martens.
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Affiliation(s)
- Katie M. Moriarty
- USDA Forest Service, Pacific Northwest Research Station, Olympia, Washington, United States of America
| | - Jake Verschuyl
- National Council for Air and Stream Improvement, Western Sustainable Forestry Program, Anacortes, Washington, United States of America
| | | | - Raymond Davis
- USDA Forest Service, Region 6, Corvallis, Oregon, United States of America
| | - Joshua Chapman
- USDA Forest Service, Region 6 Regional Office, Portland, Oregon, United States of America
| | - Bruce Hollen
- USDI Bureau of Land Management, Regional Office, Portland, Oregon, United States of America
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Seidel DP, Linklater WL, Kilian W, Preez PD, Getz WM. Mesoscale movement and recursion behaviors of Namibian black rhinos. MOVEMENT ECOLOGY 2019; 7:34. [PMID: 31728193 PMCID: PMC6842456 DOI: 10.1186/s40462-019-0176-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 09/26/2019] [Indexed: 05/16/2023]
Abstract
BACKGROUND Understanding rhino movement behavior, especially their recursive movements, holds significant promise for enhancing rhino conservation efforts, and protecting their habitats and the biodiversity they support. Here we investigate the daily, biweekly, and seasonal recursion behavior of rhinos, to aid conservation applications and increase our foundational knowledge about these important ecosystem engineers. METHODS Using relocation data from 59 rhinos across northern Namibia and 8 years of sampling efforts, we investigated patterns in 24-h displacement at dawn, dusk, midday, and midnight to examine movement behaviors at an intermediate scale and across daily behavioral modes of foraging and resting. To understand recursion patterns across animals' short and long-term ranges, we built T-LoCoH time use grids to estimate recursive movement by each individual. Comparing these grids to contemporaneous MODIS imagery, we investigated productivity's influence on short-term space use and recursion. Finally, we investigated patterns of recursion within a year's home range, measuring the time to return to the most intensively used patches. RESULTS Twenty four-hour displacements at dawn were frequently smaller than 24-h displacements at dusk or at midday and midnight resting periods. Recursion analyses demonstrated that short-term recursion was most common in areas of median rather than maximum NDVI values. Investigated across a full year, recursion analysis showed rhinos most frequently returned to areas within 8-21 days, though visits were also seen separated by months likely suggesting seasonality in range use. CONCLUSIONS Our results indicate that rhinos may frequently stay within the same area of their home ranges for days at a time, and possibly return to the same general area days in a row especially during morning foraging bouts. Recursion across larger time scales is also evident, and likely a contributing mechanism for maintaining open landscapes and browsing lawns of the savanna.
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Affiliation(s)
- Dana Paige Seidel
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, Mulford Hall, Berkeley, CA, USA
| | - Wayne L. Linklater
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, Mulford Hall, Berkeley, CA, USA
- Centre for Biodiversity and Restoration Ecology, Victoria University of Wellington, P.O. Box 600, Wellington, 6140 New Zealand
- Centre for African Conservation Ecology, Nelson Mandela University, Port Elizabeth, South Africa
| | - Werner Kilian
- Etosha National Park, PO Box 6, Okaukuejo via Outjo, Namibia
| | - Pierre du Preez
- Etosha National Park, PO Box 6, Okaukuejo via Outjo, Namibia
| | - Wayne M. Getz
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, Mulford Hall, Berkeley, CA, USA
- School of Mathematical Sciences, University of KwaZulu-Natal, Durban, South Africa
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50
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Cross SL, Tomlinson S, Craig MD, Bateman PW. The Time Local Convex Hull method as a tool for assessing responses of fauna to habitat restoration: a case study using the perentie (Varanus giganteus : Reptilia : Varanidae). AUST J ZOOL 2019. [DOI: 10.1071/zo19040] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Understanding the behavioural responses of animals to habitat change is vital to their conservation in landscapes undergoing restoration. Studies of animal responses to habitat restoration typically assess species presence/absence; however, such studies may be restricted in their ability to show whether restoration is facilitating the return of self-sustaining and functional fauna populations. We present a case study using VHF/GPS tracking of a young adult perentie (Varanus giganteus), to demonstrate the range of applications of the Time Local Convex Hull method of home-range construction in analysing the behavioural responses of fauna to habitat change and restoration. Presence/absence studies provide single point locations of an animal, and the Minimum Convex Polygon method provides an invariant estimate of habitat use across the whole home range. However, the Time Local Convex Hull method provides a useful method for assessing movement and behavioural responses of fauna to habitat change and restoration, and the specific habitat requirements for the long-term support of populations. The breadth and multidimensionality of data generated indicates strongly that understanding the complex interactions between animals and their environment is fundamental to their conservation in the face of ever-increasing rates of human-induced habitat change and degradation.
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