1
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Benhamou S, Courbin N. Accounting for central place foraging constraints in habitat selection studies. Ecology 2023; 104:e4134. [PMID: 37386731 DOI: 10.1002/ecy.4134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 04/25/2023] [Accepted: 06/13/2023] [Indexed: 07/01/2023]
Abstract
Habitat selection studies contrast actual space use with the expected use under the null hypothesis of no selection (hereafter neutral use). Neutral use is most often equated to the relative frequencies with which environmental features occur. This generates a considerable bias when studying habitat selection by foragers that perform numerous trips back and forth to a central place (CP). Indeed, the increased space use close to the CP with respect to distant places reflects a mechanical effect, rather than a true selection for the closest habitats. Yet, correctly estimating habitat selection by CP foragers is of paramount importance for a better understanding of their ecology and to properly plan conservation actions. We show that including the distance to the CP as a covariate in unconditional Resource Selection Functions, as applied in several studies, is ineffective to correct for the bias. This bias can be eliminated only by contrasting the actual use to an appropriate neutral use that considers the CP forager behavior. We also show that the need to specify an appropriate neutral use overall distribution can be bypassed by relying on a conditional approach, where the neutral use is assessed locally regardless of the distance to the CP.
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Affiliation(s)
- Simon Benhamou
- Centre d'Ecologie Fonctionnelle et Evolutive, CNRS, Montpellier, France
| | - Nicolas Courbin
- Centre d'Ecologie Fonctionnelle et Evolutive, CNRS, Montpellier, France
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2
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Morera‐Pujol V, Catry P, Magalhães M, Péron C, Reyes‐González JM, Granadeiro JP, Militão T, Dias MP, Oro D, Dell'Omo G, Müller M, Paiva VH, Metzger B, Neves V, Navarro J, Karris G, Xirouchakis S, Cecere JG, Zamora‐López A, Forero MG, Ouni R, Romdhane MS, De Felipe F, Zajková Z, Cruz‐Flores M, Grémillet D, González‐Solís J, Ramos R. Methods to detect spatial biases in tracking studies caused by differential representativeness of individuals, populations and time. DIVERS DISTRIB 2022. [DOI: 10.1111/ddi.13642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Virginia Morera‐Pujol
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
| | - Paulo Catry
- MARE ‐ Marine and Environmental Sciences Centre ISPA‐Instituto Universitário Lisbon Portugal
| | - Maria Magalhães
- Regional Secretariat for the Sea, Science and Technology Regional Directorate for Sea Affairs (DRAM) Horta Portugal
| | - Clara Péron
- Laboratoire de Biologie des Organismes et Ecosystèmes Aquatiques (UMR BOREA) MNHN, CNRS, IRD, SU, UCN, UA Paris France
| | - José Manuel Reyes‐González
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
| | - José Pedro Granadeiro
- Departamento de Biologia Animal, CESAM, Faculdade de Ciências Universidade de Lisboa Lisboa Portugal
| | - Teresa Militão
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
| | - Maria P. Dias
- Centre for Ecology, Evolution and Environmental Changes (cE3c) & CHANGE (Global Change and Sustainability Institute). Departamento de Biologia Animal Faculdade de Ciências da Universidade de Lisboa Lisboa Portugal
| | - Daniel Oro
- Centre d'Estudis Avançats de Blanes (CSIC) Blanes Spain
- IMEDEA (CSIC‐UIB) Esporles Spain
| | | | - Martina Müller
- Department of Natural Resources Science University of Rhode Island Kingston Rhode Island USA
| | - Vitor H. Paiva
- Department of Life Sciences, MARE ‐ Marine and Environmental Sciences Centre/ARNET ‐ Aquatic Research Network University of Coimbra Coimbra Portugal
| | | | - Verónica Neves
- Institute of Marine Sciences ‐ Okeanos University of the Azores Horta Portugal
| | - Joan Navarro
- Institut de Ciències del Mar CSIC Barcelona Spain
| | - Georgios Karris
- Department of Environment, Faculty of Environment Ionian University Zakinthos Greece
| | - Stavros Xirouchakis
- Natural History Museum of Crete, University Campus (Knossos). School of Sciences & Engineering University of Crete Crete Greece
| | - Jacopo G. Cecere
- Area per l'Avifauna Migratrice (BIO‐AVM) Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA) Ozzano Emilia Italy
| | - Antonio Zamora‐López
- Southeast Naturalists Association (ANSE) Murcia Spain
- Department of Zoology and Physical Anthropology University of Murcia, Espinardo Campus Murcia Spain
| | | | - Ridha Ouni
- Faculté des Sciences Mathématiques, Physiques et Naturelles de Tunis (FST), Université de Tunis El Manar Tunis Tunisia
| | | | - Fernanda De Felipe
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
| | - Zuzana Zajková
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
- Centre d'Estudis Avançats de Blanes (CSIC) Blanes Spain
| | - Marta Cruz‐Flores
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
| | - David Grémillet
- Centre d'Ecologie Fonctionnelle et Evolutive (CEFE), UMR 5175, CNRS, EPHE, IRD Université La Rochelle Montpellier France
- Percy Fitzpatrick Institute of African Ornithology NRF‐DST Centre of Excellence, University of Cape Town Rondebosch South Africa
| | - Jacob González‐Solís
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
| | - Raül Ramos
- Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia Universitat de Barcelona (UB) Barcelona Spain
- Institut de Recerca de la Biodiversitat (IRBio) Universitat de Barcelona (UB) Barcelona Spain
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3
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Courbin N, Garel M, Marchand P, Duparc A, Debeffe L, Börger L, Loison A. Interacting lethal and nonlethal human activities shape complex risk tolerance behaviors in a mountain herbivore. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2022; 32:e2640. [PMID: 35443100 DOI: 10.1002/eap.2640] [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: 09/02/2021] [Revised: 02/01/2022] [Accepted: 03/01/2022] [Indexed: 06/14/2023]
Abstract
Animals perceive human activities as risky and generally respond with fear-induced proactive behaviors to buffer the circadian patterns of lethal and nonlethal disturbances, such as diel migrations (DMs) between risky places during safe nighttime and safer places during risky daytime. However, such responses potentially incur costs through movement or reduced foraging time, so individuals should adjust their tolerance when human activities are harmless, through habituation. Yet this is a challenging cognitive task when lethal and nonlethal risks co-occur, forming complex landscapes of fear. The consequences of this human-induced complexity have, however, rarely been assessed. We studied the individual DM dynamics of chamois (Rupicapra rupicapra rupicapra), 89 GPS-tracked individual-years, from/to trails in the French Alps in areas with co-occurring lethal (hunting) and nonlethal (hiking and skiing) disturbances, with different intensities across seasons. We developed a conceptual framework relying on the risk-disturbance hypothesis and habituation to predict tolerance adjustments of chamois under various disturbance contexts and across contrasted seasonal periods. Based on spatial and statistical analyses combining periodograms and multinomial logistic models, we found that DM in relation to distance to a trail was a consistent response by chamois (~85% of individuals) to avoid human disturbance during daytime, especially during the hiking and hunting periods. Such behavior revealed a low tolerance of most chamois to human activities, although there was considerable interindividual heterogeneity in DM. Interestingly, there was an increased tolerance among the most disturbed diel migrants, potentially through habituation, with chamois performing shorter DMs in areas highly disturbed by hikers. Crucially, chamois that were most human-habituated during the hiking period remained more tolerant in the subsequent harvesting period, which could increase their risk of being harvested. In contrast, individuals less tolerant to hiking performed longer DMs when hunting risk increased, and compared to hiking, hunting exacerbated the threshold distance to trails triggering DMs. No carryover effect of hunting beyond the hunting period was observed. In conclusion, complex human-induced landscapes of fear with co-occurring disturbances by nature-based tourism and hunting may shape unexpected patterns of tolerance to human activities, whereby animal tolerance could become potentially deleterious for individual survival.
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Affiliation(s)
- Nicolas Courbin
- Laboratoire d'Écologie Alpine (LECA), UMR 5553, Université Grenoble Alpes, Université Savoie Mont-Blanc, Centre National de la Recherche Scientifique (CNRS), Le Bourget-du-Lac, France
| | - Mathieu Garel
- Office Français de la Biodiversité (OFB), Direction de la Recherche et de l'Appui Scientifique - Service Anthropisation et Fonctionnement des Ecosystèmes Terrestres, Gières, France
| | - Pascal Marchand
- Office Français de la Biodiversité (OFB), Direction de la Recherche et de l'Appui Scientifique - Service Anthropisation et Fonctionnement des Ecosystèmes Terrestres, Juvignac, France
| | - Antoine Duparc
- Laboratoire d'Écologie Alpine (LECA), UMR 5553, Université Grenoble Alpes, Université Savoie Mont-Blanc, Centre National de la Recherche Scientifique (CNRS), Le Bourget-du-Lac, France
| | - Lucie Debeffe
- Comportement et Ecologie de la Faune Sauvage (CEFS), Université de Toulouse, Institut national de recherche pour l'agriculture, l'alimentation et l'environnement (INRAE), Castanet-Tolosan, France
| | - Luca Börger
- Department of Biosciences, Swansea University, Swansea, UK
| | - Anne Loison
- Laboratoire d'Écologie Alpine (LECA), UMR 5553, Université Grenoble Alpes, Université Savoie Mont-Blanc, Centre National de la Recherche Scientifique (CNRS), Le Bourget-du-Lac, France
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4
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Fraser Franco M, Santostefano F, Kelly CD, Montiglio PO. Studying predator foraging mode and hunting success at the individual level with an online videogame. Behav Ecol 2022. [DOI: 10.1093/beheco/arac063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Predator–prey interactions are important drivers of community and ecosystem dynamics. With an online multiplayer videogame, we propose a novel system to explore within population variation in predator hunting mode, and how predator–prey behavioral interactions affect predator hunting success. We empirically examined how four predator foraging behaviors covary at three hierarchical levels (among environments, among individuals, and within individuals) to assess the structure of predator hunting mode. We also investigated how prey activity affects the foraging behavior and hunting success of predators. Our study supports key findings on predator foraging mode and predator-prey interactions from behavioral ecology. We found that individual predators displayed a diversity of hunting tactics that were conditioned by prey behavior. With prey movement, individual predators specialized either as cursorial or ambush hunters along a continuum of their hunting traits, but also shifted their strategy between encounters. Both types of hunters were generally better against slower moving prey, and they achieved similar prey captures over the sampling period. This suggests that virtual worlds supporting multiplayer online videogames can serve as legitimate systems to advance our knowledge on predator–prey interactions.
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Affiliation(s)
- Maxime Fraser Franco
- Département des Sciences Biologiques, Groupe de Recherche en Écologie et Évolution des Interactions Biologiques (GREEIB), Université du Québec à Montréal , Case postale 8888, Succursale Centre-ville, Montréal, QC H3C 3P8 , Canada
| | - Francesca Santostefano
- Département des Sciences Biologiques, Groupe de Recherche en Écologie et Évolution des Interactions Biologiques (GREEIB), Université du Québec à Montréal , Case postale 8888, Succursale Centre-ville, Montréal, QC H3C 3P8 , Canada
| | - Clint D Kelly
- Département des Sciences Biologiques, Groupe de Recherche en Écologie et Évolution des Interactions Biologiques (GREEIB), Université du Québec à Montréal , Case postale 8888, Succursale Centre-ville, Montréal, QC H3C 3P8 , Canada
| | - Pierre-Olivier Montiglio
- Département des Sciences Biologiques, Groupe de Recherche en Écologie et Évolution des Interactions Biologiques (GREEIB), Université du Québec à Montréal , Case postale 8888, Succursale Centre-ville, Montréal, QC H3C 3P8 , Canada
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5
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Seascapes of fear and competition shape regional seabird movement ecology. Commun Biol 2022; 5:208. [PMID: 35246607 PMCID: PMC8897475 DOI: 10.1038/s42003-022-03151-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 02/08/2022] [Indexed: 11/17/2022] Open
Abstract
Fear effects of predators on prey distributions are seldom considered in marine environments, especially over large spatial scales and in conservation contexts. To fill these major gaps, we tested the Seascape of Fear Hypothesis in the Benguela marine ecosystem off South Africa. Using electronic tracking data, we showed that Cape gannets and their predator, the Cape fur seal, co-occurred in daytime and competed with fisheries within coastal areas. At night, gannets are particularly vulnerable to seals, and 28% of the birds returned to the safety of their breeding colony. The remaining 72% slept at the sea surface, but shifted to offshore areas with lower seal attendance, reducing predation risk by 25%. Overall, our integrative study demonstrates how fear and competition shape the seascape of threatened Cape gannets within a marine environment perturbed by climate change and overfishing. Such knowledge has strong implications for the design of marine protected areas. Fear effects of predators on prey distributions are seldom considered in marine environments, even though they have strong implications for the design of marine protected areas. This work demonstrates such ‘Seascape of Fear’ for Cape gannets off South Africa, as they adjusted their at-sea movements relative to those of predatory Cape fur seals.
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6
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Trevail AM, Green JA, Bolton M, Daunt F, Harris SM, Miller PI, Newton S, Owen E, Polton JA, Robertson G, Sharples J, Patrick SC. Environmental heterogeneity promotes individual specialisation in habitat selection in a widely distributed seabird. J Anim Ecol 2021; 90:2875-2887. [PMID: 34492121 DOI: 10.1111/1365-2656.13588] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 08/30/2021] [Indexed: 11/29/2022]
Abstract
Individual specialisations in behaviour are predicted to arise where divergence benefits fitness. Such specialisations are more likely in heterogeneous environments where there is both greater ecological opportunity and competition-driven frequency dependent selection. Such an effect could explain observed differences in rates of individual specialisation in habitat selection, as it offers individuals an opportunity to select for habitat types that maximise resource gain while minimising competition; however, this mechanism has not been tested before. Here, we use habitat selection functions to quantify individual specialisations while foraging by black-legged kittiwakes Rissa tridactyla, a marine top predator, at 15 colonies around the United Kingdom and Ireland, along a gradient of environmental heterogeneity. We find support for the hypothesis that individual specialisations in habitat selection while foraging are more prevalent in heterogeneous environments. This trend was significant across multiple dynamic habitat variables that change over short time-scales and did not arise through site fidelity, which highlights the importance of environmental processes in facilitating behavioural adaptation by predators. Individual differences may drive evolutionary processes, and therefore these results suggest that there is broad scope for the degree of environmental heterogeneity to determine current and future population, species and community dynamics.
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Affiliation(s)
- Alice M Trevail
- School of Environmental Sciences, University of Liverpool, Liverpool, UK.,Environment and Sustainability Institute, University of Exeter, Penryn, UK
| | - Jonathan A Green
- School of Environmental Sciences, University of Liverpool, Liverpool, UK
| | - Mark Bolton
- RSPB Centre for Conservation Science, Royal Society for the Protection of Birds, Sandy, UK
| | - Francis Daunt
- Centre for Ecology & Hydrology Edinburgh, Penicuik, UK
| | | | - Peter I Miller
- Remote Sensing Group, Plymouth Marine Laboratory, Plymouth, UK
| | | | - Ellie Owen
- RSPB Centre for Conservation Science, Royal Society for the Protection of Birds, Sandy, UK
| | | | - Gail Robertson
- School of Mathematics, University of Edinburgh, Edinburgh, UK
| | - Jonathan Sharples
- School of Environmental Sciences, University of Liverpool, Liverpool, UK
| | - Samantha C Patrick
- School of Environmental Sciences, University of Liverpool, Liverpool, UK
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7
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Manlick PJ, Maldonado K, Newsome SD. Competition shapes individual foraging and survival in a desert rodent ensemble. J Anim Ecol 2021; 90:2806-2818. [PMID: 34453850 DOI: 10.1111/1365-2656.13583] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 08/17/2021] [Indexed: 01/08/2023]
Abstract
Intraspecific variation, including individual diet variation, can structure populations and communities, but the causes and consequences of individual foraging strategies are often unclear. Interactions between competition and resources are thought to dictate foraging strategies (e.g. specialization vs. generalization), but classical paradigms such as optimal foraging and niche theory offer contrasting predictions for individual consumers. Furthermore, both paradigms assume that individual foraging strategies maximize fitness, yet this prediction is rarely tested. We used repeated stable isotope measurements (δ13 C, δ15 N; N = 3,509) and 6 years of capture-mark-recapture data to quantify the relationship between environmental variation, individual foraging and consumer fitness among four species of desert rodents. We tested the relative effects of intraspecific competition, interspecific competition, resource abundance and resource diversity on the foraging strategies of 349 individual animals, and then quantified apparent survival as function of individual foraging strategies. Consistent with niche theory, individuals contracted their trophic niches and increased foraging specialization in response to both intraspecific and interspecific competition, but this effect was offset by resource availability and individuals generalized when plant biomass was high. Nevertheless, individual specialists obtained no apparent fitness benefit from trophic niche contractions as the most specialized individuals exhibited a 10% reduction in monthly survival compared to the most generalized individuals. Ultimately, this resulted in annual survival probabilities nearly 4× higher for generalists compared to specialists. These results indicate that competition is the proximate driver of individual foraging strategies, and that diet-mediated fitness variation regulates population and community dynamics in stochastic resource environments. Furthermore, our findings show dietary generalism is a fitness maximizing strategy, suggesting that plastic foraging strategies may play a key role in species' ability to cope with environmental change.
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Affiliation(s)
- Philip J Manlick
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
| | - Karin Maldonado
- Departamento de Ciencias, Facultad de Artes Liberales, Universidad Adolfo Ibáñez, Peñalolén, Chile
| | - Seth D Newsome
- Department of Biology, University of New Mexico, Albuquerque, New Mexico, USA
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8
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Carlson BS, Rotics S, Nathan R, Wikelski M, Jetz W. Individual environmental niches in mobile organisms. Nat Commun 2021; 12:4572. [PMID: 34315894 PMCID: PMC8316569 DOI: 10.1038/s41467-021-24826-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 07/06/2021] [Indexed: 11/09/2022] Open
Abstract
Individual variation is increasingly recognized as a central component of ecological processes, but its role in structuring environmental niche associations remains largely unknown. Species' responses to environmental conditions are ultimately determined by the niches of single individuals, yet environmental associations are typically captured only at the level of species. Here, we develop scenarios for how individual variation may combine to define the compound environmental niche of populations, use extensive movement data to document individual environmental niche variation, test associated hypotheses of niche configuration, and examine the consistency of individual niches over time. For 45 individual white storks (Ciconia ciconia; 116 individual-year combinations), we uncover high variability in individual environmental associations, consistency of individual niches over time, and moderate to strong niche specialization. Within populations, environmental niches follow a nested pattern, with individuals arranged along a specialist-to-generalist gradient. These results reject common assumptions of individual niche equivalency among conspecifics, as well as the separation of individual niches into disparate parts of environmental space. These findings underscore the need for a more thorough consideration of individualistic environmental responses in global change research.
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Affiliation(s)
- Ben S Carlson
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA.
- Center for Biodiversity and Global Change, Yale University, New Haven, CT, USA.
| | - Shay Rotics
- Department of Zoology, University of Cambridge, Cambridge, UK
- Movement Ecology Laboratory, Department of Ecology, Evolution and Behavior, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ran Nathan
- Movement Ecology Laboratory, Department of Ecology, Evolution and Behavior, Alexander Silberman Institute of Life Sciences, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Martin Wikelski
- Department of Migration, Max Planck Institute of Animal Behavior, Radolfzell, Germany
- Centre for the Advanced Study of Collective Behaviour, University of Konstanz, Konstanz, Germany
| | - Walter Jetz
- Department of Ecology and Evolutionary Biology, Yale University, New Haven, CT, USA
- Center for Biodiversity and Global Change, Yale University, New Haven, CT, USA
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9
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Aarts G, Mul E, Fieberg J, Brasseur S, van Gils JA, Matthiopoulos J, Riotte-Lambert L. Individual-Level Memory Is Sufficient to Create Spatial Segregation among Neighboring Colonies of Central Place Foragers. Am Nat 2021; 198:E37-E52. [PMID: 34260868 DOI: 10.1086/715014] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AbstractCentral place foragers often segregate in space, even without signs of direct agonistic interactions. Using parsimonious individual-based simulations, we show that for species with spatial cognitive abilities, individual-level memory of resource availability can be sufficient to cause spatial segregation in the foraging ranges of colonial animals. The shapes of the foraging distributions are governed by commuting costs, the emerging distribution of depleted resources, and the fidelity of foragers to their colonies. When colony fidelity is weak and foragers can easily switch to colonies located closer to favorable foraging grounds, this leads to space partitioning with equidistant borders between neighboring colonies. In contrast, when colony fidelity is strong-for example, because larger colonies provide safety in numbers or individuals are unable to leave-it can create a regional imbalance between resource requirements and resource availability. This leads to nontrivial space-use patterns that propagate through the landscape. Interestingly, while better spatial memory creates more defined boundaries between neighboring colonies, it can lower the average intake rate of the population, suggesting a potential trade-off between an individual's attempt for increased intake and population growth rates.
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10
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Orgeret F, Reisinger RR, Carpenter-Kling T, Keys DZ, Corbeau A, Bost CA, Weimerskirch H, Pistorius PA. Spatial segregation in a sexually dimorphic central place forager: Competitive exclusion or niche divergence? J Anim Ecol 2021; 90:2404-2420. [PMID: 34091891 DOI: 10.1111/1365-2656.13552] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 05/29/2021] [Indexed: 12/11/2022]
Abstract
Sexual competition is increasingly recognized as an important selective pressure driving species distributions. However, few studies have investigated the relative importance of interpopulation versus intrapopulation competition in relation to habitat availability and selection. To explain spatial segregation between sexes that often occurs in non-territorial and central place foragers, such as seabirds, two hypotheses are commonly used. The 'competitive exclusion' hypothesis states that dominant individuals should exclude subordinate individuals through direct competition, whereas the 'niche divergence' hypothesis states that segregation occurs due to past competition and habitat specialization. We tested these hypotheses in two populations of an extreme wide-ranging and sexually dimorphic seabird, investigating the relative role of intrapopulation and interpopulation competition in influencing sex-specific distribution and habitat preferences. Using GPS loggers, we tracked 192 wandering albatrosses Diomedea exulans during four consecutive years (2016-2019), from two neighbouring populations in the Southern Ocean (Prince Edward and Crozet archipelagos). We simulated pseudo-tracks to create a null spatial distribution and used Kernel Density Estimates (KDE) and Resource Selection Functions (RSF) to distinguish the relative importance of within- versus between-population competition. Kernel Density Estimates showed that only intrapopulation sexual segregation was significant for each monitoring year, and that tracks between the two colonies resulted in greater overlap than expected from the null distribution, especially for the females. RSF confirmed these results and highlighted key at-sea foraging areas, even if the estimated of at-sea densities were extremely low. These differences in selected areas between sites and sexes were, however, associated with high interannual variability in habitat preferences, with no clear specific preferences per site and sex. Our results suggest that even with low at-sea population densities, historic intrapopulation competition in wide-ranging seabirds may have led to sexual dimorphism and niche specialization, favouring the 'niche divergence' hypothesis. In this study, we provide a protocol to study competition within as well as between populations of central place foragers. This is relevant for understanding their distribution patterns and population regulation, which could potentially improve management of threatened populations.
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Affiliation(s)
- Florian Orgeret
- Marine Apex Predator Research Unit (MAPRU), Department of Zoology, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth, South Africa
| | - Ryan R Reisinger
- Institute of Marine Sciences, University of California Santa Cruz, Santa Cruz, CA, USA
| | - Tegan Carpenter-Kling
- Marine Apex Predator Research Unit (MAPRU), Department of Zoology, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth, South Africa.,DST-NRF Centre of Excellence at the FitzPatrick, Institute of African Ornithology, Nelson Mandela University, Port Elizabeth, South Africa
| | - Danielle Z Keys
- Marine Apex Predator Research Unit (MAPRU), Department of Zoology, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth, South Africa
| | - Alexandre Corbeau
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-Université de La Rochelle, Villiers-en-Bois, France
| | - Charles-André Bost
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-Université de La Rochelle, Villiers-en-Bois, France
| | - Henri Weimerskirch
- Centre d'Etudes Biologiques de Chizé, UMR 7372 du CNRS-Université de La Rochelle, Villiers-en-Bois, France
| | - Pierre A Pistorius
- Marine Apex Predator Research Unit (MAPRU), Department of Zoology, Institute for Coastal and Marine Research, Nelson Mandela University, Port Elizabeth, South Africa.,DST-NRF Centre of Excellence at the FitzPatrick, Institute of African Ornithology, Nelson Mandela University, Port Elizabeth, South Africa
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11
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Austin RE, De Pascalis F, Votier SC, Haakonsson J, Arnould JPY, Ebanks-Petrie G, Newton J, Harvey J, Green JA. Interspecific and intraspecific foraging differentiation of neighbouring tropical seabirds. MOVEMENT ECOLOGY 2021; 9:27. [PMID: 34039419 PMCID: PMC8152358 DOI: 10.1186/s40462-021-00251-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Social interactions, reproductive demands and intrinsic constraints all influence foraging decisions in animals. Understanding the relative importance of these factors in shaping the way that coexisting species within communities use and partition resources is central to knowledge of ecological and evolutionary processes. However, in marine environments, our understanding of the mechanisms that lead to and allow coexistence is limited, particularly in the tropics. METHODS Using simultaneous data from a suite of animal-borne data loggers (GPS, depth recorders, immersion and video), dietary samples and stable isotopes, we investigated interspecific and intraspecific differences in foraging of two closely-related seabird species (the red-footed booby and brown booby) from neighbouring colonies on the Cayman Islands in the Caribbean. RESULTS The two species employed notably different foraging strategies, with marked spatial segregation, but limited evidence of interspecific dietary partitioning. The larger-bodied brown booby foraged within neritic waters, with the smaller-bodied red-footed booby travelling further offshore. Almost no sex differences were detected in foraging behaviour of red-footed boobies, while male and female brown boobies differed in their habitat use, foraging characteristics and dietary contributions. We suggest that these behavioural differences may relate to size dimorphism and competition: In the small brown booby population (n < 200 individuals), larger females showed a higher propensity to remain in coastal waters where they experienced kleptoparasitic attacks from magnificent frigatebirds, while smaller males that were never kleptoparasitised travelled further offshore, presumably into habitats with lower kleptoparasitic pressure. In weakly dimorphic red-footed boobies, these differences are less pronounced. Instead, density-dependent pressures on their large population (n > 2000 individuals) and avoidance of kleptoparasitism may be more prevalent in driving movements for both sexes. CONCLUSIONS Our results reveal how, in an environment where opportunities for prey diversification are limited, neighbouring seabird species segregate at-sea, while exhibiting differing degrees of sexual differentiation. While the mechanisms underlying observed patterns remain unclear, our data are consistent with the idea that multiple factors involving both conspecifics and heterospecifics, as well as reproductive pressures, may combine to influence foraging differences in these neighbouring tropical species.
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Affiliation(s)
- R E Austin
- School of Environmental Sciences, University of Liverpool, Liverpool, L69 3GP, UK.
| | - F De Pascalis
- School of Environmental Sciences, University of Liverpool, Liverpool, L69 3GP, UK
- Present Address: Department of Environmental Science and Policy, University of Milan, Milan, Italy
| | - S C Votier
- The Lyell Centre, Heriot-Watt University, Edinburgh, EH14 4AP, UK
| | - J Haakonsson
- Department of Environment, Cayman Islands Government, George Town, Grand Cayman, KY1-1002, Cayman Islands
| | - J P Y Arnould
- School of Life and Environmental Sciences, Deakin University, Burwood, VIC, 3125, Australia
| | - G Ebanks-Petrie
- Department of Environment, Cayman Islands Government, George Town, Grand Cayman, KY1-1002, Cayman Islands
| | - J Newton
- NERC National Environmental Isotope Facility, Scottish Universities Environmental Research Centre, Scottish Enterprise Technology Park, East Kilbride, G75 0QF, UK
| | - J Harvey
- Department of Environment, Cayman Islands Government, George Town, Grand Cayman, KY1-1002, Cayman Islands
- Present Address: Guy Harvey Ocean Foundation, George Town, Grand Cayman, KY1-1005, Cayman Islands
| | - J A Green
- School of Environmental Sciences, University of Liverpool, Liverpool, L69 3GP, UK
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12
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Carrying Capacity of Spatially Distributed Metapopulations. Trends Ecol Evol 2021; 36:164-173. [DOI: 10.1016/j.tree.2020.10.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 10/03/2020] [Accepted: 10/08/2020] [Indexed: 12/28/2022]
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13
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Hertel AG, Royauté R, Zedrosser A, Mueller T. Biologging reveals individual variation in behavioural predictability in the wild. J Anim Ecol 2020; 90:723-737. [PMID: 33301175 DOI: 10.1111/1365-2656.13406] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 11/16/2020] [Indexed: 12/21/2022]
Abstract
Recent research highlights the ecological importance of individual variation in behavioural predictability. Individuals may not only differ in their average expression of a behavioural trait (their behavioural type) and in their ability to adjust behaviour to changing environmental conditions (individual plasticity), but also in their variability around their average behaviour (predictability). However, quantifying behavioural predictability in the wild has been challenging due to limitations of acquiring sufficient repeated behavioural measures. We here demonstrate how common biologging data can be used to detect individual variation in behavioural predictability in the wild and reveal the coexistence of highly predictable individuals along with unpredictable individuals within the same population. We repeatedly quantified two behaviours-daily movement distance and diurnal activity-in 62 female brown bears Ursus arctos tracked across 187 monitoring years. We calculated behavioural predictability over the short term (50 consecutive monitoring days within 1 year) and long term (across monitoring years) as the residual intra-individual variability (rIIV) of behaviour around the behavioural reaction norm. We tested whether predictability varies systematically across average behavioural types and whether it is correlated across functionally distinct behaviours, that is, daily movement distance and amount of diurnal activity. Brown bears showed individual variation in behavioural predictability from predictable to unpredictable individuals. For example, the standard deviation around the average daily movement distance within one monitoring year varied up to fivefold from 1.1 to 5.5 km across individuals. Individual predictability for both daily movement distance and diurnality was conserved across monitoring years. Individual predictability was correlated with behavioural type where individuals which were on average more diurnal and mobile were also more unpredictable in their behaviour. In contrast, more nocturnal individuals moved less and were more predictable in their behaviour. Finally, individual predictability in daily movement distance and diurnality was positively correlated, suggesting that individual predictability may be a quantitative trait in its own regard that could evolve and is underpinned by genetic variation. Unpredictable individuals may cope better with stochastic events and unpredictability may hence be an adaptive behavioural response to increased predation risk. Coexistence of predictable and unpredictable individuals may therefore ensure adaptable and resilient populations.
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Affiliation(s)
- Anne G Hertel
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Frankfurt (Main), Germany.,Department of Natural Sciences and Environmental Health, University of South-Eastern Norway, Bø, Norway
| | - Raphaël Royauté
- Behavioural Ecology, Department of Biology, Ludwig-Maximilian University of Munich, Planegg-Martinsried, Germany
| | - Andreas Zedrosser
- Department of Natural Sciences and Environmental Health, University of South-Eastern Norway, Bø, Norway.,Institute of Wildlife Biology and Game Management, University of Natural Resources and Life Sciences, Vienna, Austria
| | - Thomas Mueller
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Frankfurt (Main), Germany.,Department of Biological Sciences, Goethe University, Frankfurt (Main), Germany
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14
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Collet J, Weimerskirch H. Albatrosses can memorize locations of predictable fishing boats but favour natural foraging. Proc Biol Sci 2020; 287:20200958. [PMID: 32752984 DOI: 10.1098/rspb.2020.0958] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Human activities generate food attracting many animals worldwide, causing major conservation issues. The spatio-temporal predictability of anthropogenic resources could reduce search costs for animals and mediate their attractiveness. We investigated this through GPS tracking in breeding black-browed albatrosses attracted to fishing boats. We tested for answers to the following questions. (i) Can future boat locations be anticipated from cues available to birds? (ii) Are birds able to appropriately use these cues to increase encounters? (iii) How frequently do birds use these cues? Boats were spatially persistent: birds searching in the direction where they previously attended boats would encounter twice as many boats compared with following a random direction strategy. A large proportion of birds did not use this cue: across pairs of consecutive trips (n = 85), 51% of birds switched their foraging direction irrespective of previous boat encounters. Still, 15 birds (27%) were observed to closely approach (approx. 0.1-1 km) where they previously attended a boat while boats were no longer there. This is less than the distance expected by chance (approx. 10-100 km), based on permutation control procedures accounting for individual-specific spatial consistency, suggesting individuals could memorize where they encountered boats across consecutive trips. We conclude albatrosses were able to exploit predictive cues from recent boat encounters but most favoured alternative resources.
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Affiliation(s)
- Julien Collet
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de la Rochelle, 79360 Villiers-en-Bois, France.,Department of Zoology, University of Oxford, 10a Mansfield Road, OX1 3QT, Oxford, UK
| | - Henri Weimerskirch
- Centre d'Etudes Biologiques de Chizé, UMR 7372 CNRS-Université de la Rochelle, 79360 Villiers-en-Bois, France
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15
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De Pascalis F, Imperio S, Benvenuti A, Catoni C, Rubolini D, Cecere JG. Sex-specific foraging behaviour is affected by wind conditions in a sexually size dimorphic seabird. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.05.014] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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16
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Courbin N, Chinho T, Pichegru L, Verma-Grémillet A, Péron C, Ryan PG, Grémillet D. The dance of the Cape gannet may contain social information on foraging behaviour. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.06.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Hertel AG, Niemelä PT, Dingemanse NJ, Mueller T. A guide for studying among-individual behavioral variation from movement data in the wild. MOVEMENT ECOLOGY 2020; 8:30. [PMID: 32612837 PMCID: PMC7325061 DOI: 10.1186/s40462-020-00216-8] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 06/15/2020] [Indexed: 05/19/2023]
Abstract
Animal tracking and biologging devices record large amounts of data on individual movement behaviors in natural environments. In these data, movement ecologists often view unexplained variation around the mean as "noise" when studying patterns at the population level. In the field of behavioral ecology, however, focus has shifted from population means to the biological underpinnings of variation around means. Specifically, behavioral ecologists use repeated measures of individual behavior to partition behavioral variability into intrinsic among-individual variation and reversible behavioral plasticity and to quantify: a) individual variation in behavioral types (i.e. different average behavioral expression), b) individual variation in behavioral plasticity (i.e. different responsiveness of individuals to environmental gradients), c) individual variation in behavioral predictability (i.e. different residual within-individual variability of behavior around the mean), and d) correlations among these components and correlations in suites of behaviors, called 'behavioral syndromes'. We here suggest that partitioning behavioral variability in animal movements will further the integration of movement ecology with other fields of behavioral ecology. We provide a literature review illustrating that individual differences in movement behaviors are insightful for wildlife and conservation studies and give recommendations regarding the data required for addressing such questions. In the accompanying R tutorial we provide a guide to the statistical approaches quantifying the different aspects of among-individual variation. We use movement data from 35 African elephants and show that elephants differ in a) their average behavior for three common movement behaviors, b) the rate at which they adjusted movement over a temporal gradient, and c) their behavioral predictability (ranging from more to less predictable individuals). Finally, two of the three movement behaviors were correlated into a behavioral syndrome (d), with farther moving individuals having shorter mean residence times. Though not explicitly tested here, individual differences in movement and predictability can affect an individual's risk to be hunted or poached and could therefore open new avenues for conservation biologists to assess population viability. We hope that this review, tutorial, and worked example will encourage movement ecologists to examine the biology of individual variation in animal movements hidden behind the population mean.
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Affiliation(s)
- Anne G. Hertel
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Senckenberganlage 25, 60325 Frankfurt am Main, Germany
- Department of Natural Sciences and Environmental Health, University of South-Eastern Norway, 3800 Bø i Telemark, Norway
| | - Petri T. Niemelä
- Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany
| | - Niels J. Dingemanse
- Behavioural Ecology, Department of Biology, Ludwig-Maximilians University of Munich, Planegg-Martinsried, Germany
| | - Thomas Mueller
- Senckenberg Biodiversity and Climate Research Centre (SBiK-F), Senckenberganlage 25, 60325 Frankfurt am Main, Germany
- Department of Biological Sciences, Goethe University Frankfurt, Max-von-Laue-Straße 9, 60438 Frankfurt (Main), Germany
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18
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Balme GA, le Roex N, Rogan MS, Hunter LTB. Ecological opportunity drives individual dietary specialization in leopards. J Anim Ecol 2019; 89:589-600. [PMID: 31579935 DOI: 10.1111/1365-2656.13109] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2019] [Accepted: 07/30/2019] [Indexed: 11/29/2022]
Abstract
Individual specialization, when individuals exploit only a subset of resources utilized by the population, is a widespread phenomenon. It provides the basis for evolutionary diversification and can impact population and community dynamics. Both phenotypic traits and environmental conditions are predicted to influence individual specialization; however, its adaptive consequences are poorly understood, particularly among large mammalian carnivores that play an important role in shaping ecosystems. We used observations of 2,960 kills made by 49 leopards Panthera pardus in the Sabi Sand Game Reserve, South Africa, to quantify the magnitude of individual dietary specialization in a solitary large carnivore, and to examine the proximate and ultimate drivers of this behaviour. We found evidence of individual specialization in leopard diet, with respect to both the species and size of prey killed. Males tended to be more specialized than females, likely because they could access a wider range of prey due to larger body size. Similarly, individuals that encountered a greater diversity of prey tended to be more specialized. Our results confirmed that ecological opportunity was a key determinant of individual specialization; however, contrary to predictions, per capita resource availability (and by extension, intraspecific competition) did not affect the degree of specialization exhibited by individuals. Surprisingly, dietary specialization appeared to disadvantage male leopards. Specialist males overlapped with fewer resident females, had fewer cubs born on their home ranges and had fewer cubs survive to independence on their home ranges than generalist males. This may have resulted from the high degree of environmental stochasticity experienced during our study, as dietary specialization is expected to advantage individuals more during periods of resource predictability. In summary, we showed that a species usually considered to be a dietary generalist was in fact a heterogeneous collection of specialist and generalist individuals. Individual specialization is typically assumed to be maintained by disruptive and/or fluctuating selection; hence, the somewhat paradoxical coexistence of both in the same population might be explained by a dynamic evolutionary equilibrium that exists between specialists and generalists, in which each benefit under different conditions.
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Affiliation(s)
- Guy A Balme
- Panthera, New York, NY, USA.,Institute for Communities and Wildlife in Africa, University of Cape Town, Cape Town, South Africa
| | - Nikki le Roex
- Institute for Communities and Wildlife in Africa, University of Cape Town, Cape Town, South Africa.,Scientific Services, South African National Parks, Skukuza, South Africa
| | - Matthew S Rogan
- Panthera, New York, NY, USA.,Institute for Communities and Wildlife in Africa, University of Cape Town, Cape Town, South Africa
| | - Luke T B Hunter
- Wildlife Conservation Society, New York, NY, USA.,School of Life Sciences, University of KwaZulu-Natal, Durban, South Africa
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19
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High frequency GPS bursts and path-level analysis reveal linear feature tracking by red foxes. Sci Rep 2019; 9:8849. [PMID: 31221989 PMCID: PMC6586955 DOI: 10.1038/s41598-019-45150-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Accepted: 05/31/2019] [Indexed: 12/05/2022] Open
Abstract
There is a need to quantify and better understand how wildlife interact with linear features, as these are integral elements of most landscapes. One potentially important aspect is linear feature tracking (LFT), yet studies rarely succeed in directly revealing or quantifying this behavior. In a proof-of-concept study, we employed short-term intensive GPS monitoring of red foxes (Vulpes vulpes) in a multiple-use landscape in southern Norway. Using periodic bursts of high frequency GPS position fixes, we performed modified path selection analyses to estimate the propensity of foxes to track natural and man-made linear features (roads, forest edges, and streams) once they are encountered. Foxes in our study tracked primarily forest edges and roads. Forty-three percent of bursts that encountered any linear feature resulted in LFT. LFT, although prominent, was manifested as a short-lived behavior, with overall median times to linear feature abandonment around two minutes. Movement speeds were highest along roads, perhaps due to greater ease of travel or higher perceived risk. In the highly heterogeneous habitats that characterize human-dominated landscapes, LFT may be manifested at such a fine spatio-temporal scale that it would remain hidden during telemetry studies employing conventional position fix frequencies. The approach described here may aid others studying spatial behaviors that are manifested over very short durations, yet are biologically significant.
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20
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Campbell KJ, Steinfurth A, Underhill LG, Coetzee JC, Dyer BM, Ludynia K, Makhado AB, Merkle D, Rademan J, Upfold L, Sherley RB. Local forage fish abundance influences foraging effort and offspring condition in an endangered marine predator. J Appl Ecol 2019. [DOI: 10.1111/1365-2664.13409] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kate J. Campbell
- Animal Demography Unit, Department of Biological Sciences University of Cape Town Cape Town South Africa
- Marine Research (MA‐RE) Institute University of Cape Town Cape Town South Africa
| | - Antje Steinfurth
- FitzPatrick Institute of African Ornithology, DST‐NRF Centre of Excellence University of Cape Town Cape Town South Africa
| | - Les G. Underhill
- Animal Demography Unit, Department of Biological Sciences University of Cape Town Cape Town South Africa
| | - Janet C. Coetzee
- Fisheries Management Branch Department of Agriculture, Forestry and Fisheries Cape Town South Africa
| | - Bruce M. Dyer
- Oceans and Coasts Branch Department of Environmental Affairs Cape Town South Africa
| | - Katrin Ludynia
- Marine Research (MA‐RE) Institute University of Cape Town Cape Town South Africa
- Southern African Foundation for the Conservation of Coastal Birds (SANCCOB) Cape Town South Africa
| | - Azwianewi B. Makhado
- FitzPatrick Institute of African Ornithology, DST‐NRF Centre of Excellence University of Cape Town Cape Town South Africa
- Oceans and Coasts Branch Department of Environmental Affairs Cape Town South Africa
| | - Dagmar Merkle
- Fisheries Management Branch Department of Agriculture, Forestry and Fisheries Cape Town South Africa
| | - Johan Rademan
- Fisheries Management Branch Department of Agriculture, Forestry and Fisheries Cape Town South Africa
| | - Leshia Upfold
- Oceans and Coasts Branch Department of Environmental Affairs Cape Town South Africa
| | - Richard B. Sherley
- Environment and Sustainability Institute University of Exeter Exeter UK
- Bristol Zoological Society Bristol UK
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21
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Péron C, Authier M, Grémillet D. Testing the transferability of track-based habitat models for sound marine spatial planning. DIVERS DISTRIB 2018. [DOI: 10.1111/ddi.12832] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Affiliation(s)
- Clara Péron
- Centre d'Ecologie Fonctionnelle et Evolutive; UMR 5175; CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE; Montpellier France
- MARBEC; UMR 9190; IRD-CNRS-UM-IFREMER; Université de Montpellier; Montpellier France
| | - Matthieu Authier
- ADERA; Pessac Cedex France
- Observatoire PELAGIS; Systèmes d'Observation pour la Conservation des Mammifères et des Oiseaux Marins; UMS 3462 Université de La Rochelle-CNRS, Pôle Analytique; La Rochelle France
| | - David Grémillet
- Centre d'Ecologie Fonctionnelle et Evolutive; UMR 5175; CNRS - Université de Montpellier - Université Paul-Valéry Montpellier - EPHE; Montpellier France
- FitzPatrick Institute; DST-NRF Centre of Excellence at the University of Cape Town; Rondebosch South Africa
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