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Tiffin HS, Brown JD, Ternent M, Snavely B, Carrollo E, Kibe E, Buderman FE, Mullinax JM, Machtinger ET. Resolution of Clinical Signs of Sarcoptic Mange in American Black Bears (Ursus americanus), in Ivermectin-Treated and Nontreated Individuals. J Wildl Dis 2024; 60:434-447. [PMID: 38305090 DOI: 10.7589/jwd-d-23-00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Accepted: 10/31/2023] [Indexed: 02/03/2024]
Abstract
The parasitic mite Sarcoptes scabiei causes mange in nearly 150 species of mammals by burrowing under the skin, triggering hypersensitivity responses that can alter animals' behavior and result in extreme weight loss, secondary infections, and even death. Since the 1990s, sarcoptic mange has increased in incidence and geographic distribution in Pennsylvania black bear (Ursus americanus) populations, including expansion into other states. Recovery from mange in free-ranging wildlife has rarely been evaluated. Following the Pennsylvania Game Commission's standard operating procedures at the time of the study, treatment consisted of one subcutaneous injection of ivermectin. To evaluate black bear survival and recovery from mange, from 2018 to 2020 we fitted 61 bears, including 43 with mange, with GPS collars to track their movements and recovery. Bears were collared in triplicates according to sex and habitat, consisting of one bear without mange (healthy control), one scabietic bear treated with ivermectin when collared, and one untreated scabietic bear. Bears were reevaluated for signs of mange during annual den visits, if recaptured during the study period, and after mortality events. Disease status and recovery from mange was determined based on outward gross appearance and presence of S. scabiei mites from skin scrapes. Of the 36 scabietic bears with known recovery status, 81% fully recovered regardless of treatment, with 88% recovered with treatment and 74% recovered without treatment. All bears with no, low, or moderate mite burdens (<16 mites on skin scrapes) fully recovered from mange (n=20), and nearly half of bears with severe mite burden (≥16 mites) fully recovered (n=5, 42%). However, nonrecovered status did not indicate mortality, and mange-related mortality was infrequent. Most bears were able to recover from mange irrespective of treatment, potentially indicating a need for reevaluation of the mange wildlife management paradigm.
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Affiliation(s)
- Hannah S Tiffin
- Department of Entomology, Pennsylvania State University, 4 Chemical Ecology Laboratory, University Park, Pennsylvania 16802, USA
| | - Justin D Brown
- Department of Veterinary & Biomedical Sciences, Pennsylvania State University, 108D AVBS Building, Shortlidge Rd., University Park, Pennsylvania 16802, USA
| | - Mark Ternent
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Brandon Snavely
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Emily Carrollo
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Ethan Kibe
- Pennsylvania Game Commission, 2001 Elmerton Ave., Harrisburg, Pennsylvania 17110, USA
| | - Frances E Buderman
- Department of Ecosystem Science & Management, Pennsylvania State University, 401 Forest Resources Building, University Park, Pennsylvania 16802, USA
| | - Jennifer M Mullinax
- Department of Environmental Science & Technology, University of Maryland, 1433 Animal Science Building, 8127 Regents Dr., College Park, Maryland 20742, USA
| | - Erika T Machtinger
- Department of Entomology, Pennsylvania State University, 4 Chemical Ecology Laboratory, University Park, Pennsylvania 16802, USA
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Gundermann KP, Diefenbach DR, Walter WD, Corondi AM, Banfield JE, Wallingford BD, Stainbrook DP, Rosenberry CS, Buderman FE. Change-point models for identifying behavioral transitions in wild animals. Mov Ecol 2023; 11:65. [PMID: 37864238 PMCID: PMC10589947 DOI: 10.1186/s40462-023-00430-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 10/10/2023] [Indexed: 10/22/2023]
Abstract
Animal behavior can be difficult, time-consuming, and costly to observe in the field directly. Innovative modeling methods, such as hidden Markov models (HMMs), allow researchers to infer unobserved animal behaviors from movement data, and implementations often assume that transitions between states occur multiple times. However, some behavioral shifts of interest, such as parturition, migration initiation, and juvenile dispersal, may only occur once during an observation period, and HMMs may not be the best approach to identify these changes. We present two change-point models for identifying single transitions in movement behavior: a location-based change-point model and a movement metric-based change-point model. We first conducted a simulation study to determine the ability of these models to detect a behavioral transition given different amounts of data and the degree of behavioral shifts. We then applied our models to two ungulate species in central Pennsylvania that were fitted with global positioning system collars and vaginal implant transmitters to test hypotheses related to parturition behavior. We fit these models in a Bayesian framework and directly compared the ability of each model to describe the parturition behavior across species. Our simulation study demonstrated that successful change point estimation using either model was possible given at least 12 h of post-change observations and 15 min fix interval. However, our models received mixed support among deer and elk in Pennsylvania due to behavioral variation between species and among individuals. Our results demonstrate that when the behavior follows the dynamics proposed by the two models, researchers can identify the timing of a behavioral change. Although we refer to detecting parturition events, our results can be applied to any behavior that results in a single change in time.
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Affiliation(s)
- Kathleen P Gundermann
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, USA.
| | - D R Diefenbach
- U. S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, University Park, PA, USA
| | - W D Walter
- U. S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, University Park, PA, USA
| | - A M Corondi
- Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, University Park, PA, USA
| | - J E Banfield
- Pennsylvania Game Commission, Harrisburg, PA, USA
| | | | | | | | - F E Buderman
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, USA
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Buderman FE, Devries JH, Koons DN. A life-history spectrum of population responses to simultaneous change in climate and land use. J Anim Ecol 2023. [PMID: 36995500 DOI: 10.1111/1365-2656.13919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 03/05/2023] [Indexed: 03/31/2023]
Abstract
1. Climate and land-use change are two of the primary threats to global biodiversity; however, each species within a community may respond differently to these facets of global change. Although it is typically assumed that species use the habitat that is advantageous for survival and reproduction, anthropogenic changes to the environment can create ecological traps, making it critical to assess both habitat selection (e.g., where species congregate on the landscape) and the influence of selected habitats on the demographic processes that govern population dynamics. 2. We used a long-term (1958-2011), large-scale, multi-species data set for waterfowl that spans the United States and Canada to estimate species-specific responses to climate and land use variables in a landscape that has undergone significant environmental change across space and time. We first estimated the effects of change in climate and land use variables on habitat selection and population dynamics for nine species. We then hypothesized that species-specific responses to environmental change would scale with life-history traits, specifically: longevity, nesting phenology, and female breeding site fidelity. 3. We observed species-level heterogeneity in the demographic and habitat selection responses to climate and land use change, which would complicate community-level habitat management. Our work highlights the importance of multi-species monitoring and community-level analysis, even among closely related species. 4. We detected several relationships between life-history traits, particularly nesting phenology, and species' responses to environmental change. One species, the early-nesting northern pintail (Anas acuta), was consistently at the extreme end of responses to land use and climate predictors and has been a species of conservation concern since their population began to decline in the 1980s. They, and the blue-winged teal, also demonstrated a positive habitat selection response to the proportion of cropland on the landscape that simultaneously reduced abundance the following year, indicative of susceptibility to ecological traps. 5. By distilling the diversity of species' responses to environmental change within a community, our methodological approach and findings will help improve predictions of community responses to global change and can inform multi-species management and conservation plans in dynamic landscapes that are based on simple tenets of life-history theory.
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Affiliation(s)
- Frances E Buderman
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, USA
| | - James H Devries
- Institute for Wetland and Waterfowl Research, Ducks Unlimited Canada, Stonewall, Manitoba, Canada
| | - David N Koons
- Department of Fish, Wildlife, and Conservation Biology and Graduate Degree Program in Ecology, Colorado State University, Fort Collins, Colorado, USA
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DePasquale C, Franklin K, Jia Z, Jhaveri K, Buderman FE. The effects of exploratory behavior on physical activity in a common animal model of human disease, zebrafish ( Danio rerio). Front Behav Neurosci 2022; 16:1020837. [PMID: 36425283 PMCID: PMC9679429 DOI: 10.3389/fnbeh.2022.1020837] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/14/2022] [Indexed: 08/27/2023] Open
Abstract
Zebrafish (Danio rerio) are widely accepted as a multidisciplinary vertebrate model for neurobehavioral and clinical studies, and more recently have become established as a model for exercise physiology and behavior. Individual differences in activity level (e.g., exploration) have been characterized in zebrafish, however, how different levels of exploration correspond to differences in motivation to engage in swimming behavior has not yet been explored. We screened individual zebrafish in two tests of exploration: the open field and novel tank diving tests. The fish were then exposed to a tank in which they could choose to enter a compartment with a flow of water (as a means of testing voluntary motivation to exercise). After a 2-day habituation period, behavioral observations were conducted. We used correlative analyses to investigate the robustness of the different exploration tests. Due to the complexity of dependent behavioral variables, we used machine learning to determine the personality variables that were best at predicting swimming behavior. Our results show that contrary to our predictions, the correlation between novel tank diving test variables and open field test variables was relatively weak. Novel tank diving variables were more correlated with themselves than open field variables were to each other. Males exhibited stronger relationships between behavioral variables than did females. In terms of swimming behavior, fish that spent more time in the swimming zone spent more time actively swimming, however, swimming behavior was inconsistent across the time of the study. All relationships between swimming variables and exploration tests were relatively weak, though novel tank diving test variables had stronger correlations. Machine learning showed that three novel tank diving variables (entries top/bottom, movement rate, average top entry duration) and one open field variable (proportion of time spent frozen) were the best predictors of swimming behavior, demonstrating that the novel tank diving test is a powerful tool to investigate exploration. Increased knowledge about how individual differences in exploration may play a role in swimming behavior in zebrafish is fundamental to their utility as a model of exercise physiology and behavior.
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Affiliation(s)
- Cairsty DePasquale
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Kristina Franklin
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Zhaohan Jia
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Kavya Jhaveri
- Department of Biology, Pennsylvania State University – Altoona, Altoona, PA, United States
| | - Frances E. Buderman
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, United States
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Buderman FE, Gingery TM, Diefenbach DR, Gigliotti LC, Begley-Miller D, McDill MM, Wallingford BD, Rosenberry CS, Drohan PJ. Caution is warranted when using animal space-use and movement to infer behavioral states. Mov Ecol 2021; 9:30. [PMID: 34116712 PMCID: PMC8196457 DOI: 10.1186/s40462-021-00264-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 05/04/2021] [Indexed: 06/08/2023]
Abstract
BACKGROUND Identifying the behavioral state for wild animals that can't be directly observed is of growing interest to the ecological community. Advances in telemetry technology and statistical methodologies allow researchers to use space-use and movement metrics to infer the underlying, latent, behavioral state of an animal without direct observations. For example, researchers studying ungulate ecology have started using these methods to quantify behaviors related to mating strategies. However, little work has been done to determine if assumed behaviors inferred from movement and space-use patterns correspond to actual behaviors of individuals. METHODS Using a dataset with male and female white-tailed deer location data, we evaluated the ability of these two methods to correctly identify male-female interaction events (MFIEs). We identified MFIEs using the proximity of their locations in space as indicators of when mating could have occurred. We then tested the ability of utilization distributions (UDs) and hidden Markov models (HMMs) rendered with single sex location data to identify these events. RESULTS For white-tailed deer, male and female space-use and movement behavior did not vary consistently when with a potential mate. There was no evidence that a probability contour threshold based on UD volume applied to an individual's UD could be used to identify MFIEs. Additionally, HMMs were unable to identify MFIEs, as single MFIEs were often split across multiple states and the primary state of each MFIE was not consistent across events. CONCLUSIONS Caution is warranted when interpreting behavioral insights rendered from statistical models applied to location data, particularly when there is no form of validation data. For these models to detect latent behaviors, the individual needs to exhibit a consistently different type of space-use and movement when engaged in the behavior. Unvalidated assumptions about that relationship may lead to incorrect inference about mating strategies or other behaviors.
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Affiliation(s)
- Frances E Buderman
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA.
| | - Tess M Gingery
- Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, University Park, PA, 16802, USA
| | - Duane R Diefenbach
- U. S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State University, University Park, PA, 16802, USA
| | - Laura C Gigliotti
- Department of Environmental Science, Policy, and Management, University of California Berkeley, Berkeley, CA, 94720, USA
| | | | - Marc M McDill
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
| | | | | | - Patrick J Drohan
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
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Affiliation(s)
- Evan G. Cooch
- Department of Natural Resources Cornell University 202 Fernow Hall Ithaca NY 14853 USA
| | - Ray T. Alisauskas
- Environment and Climate Change Canada Prairie and Northern Wildlife Research Centre 115 Perimeter Road Saskatoon SK S7N 0X4 Canada
| | - Frances E. Buderman
- Department of Ecosystem Science & Management Pennsylvania State University 401 Forest Resources Building, University Park PA 16802 USA
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Buderman FE, Devries JH, Koons DN. Changes in climate and land use interact to create an ecological trap in a migratory species. J Anim Ecol 2020; 89:1961-1977. [DOI: 10.1111/1365-2656.13228] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2019] [Accepted: 02/24/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Frances E. Buderman
- Department of Ecosystem Science and Management Pennsylvania State University University Park PA USA
| | - Jim H. Devries
- Institute for Wetland and Waterfowl ResearchDucks Unlimited Canada Stonewall Manitoba Canada
| | - David N. Koons
- Department of Fish, Wildlife, and Conservation Biology Graduate Degree Program in Ecology Colorado State University Fort Collins CO USA
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8
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Alldredge MW, Buderman FE, Blecha KA. Human-Cougar interactions in the wildland-urban interface of Colorado's front range. Ecol Evol 2019; 9:10415-10431. [PMID: 31632646 PMCID: PMC6787938 DOI: 10.1002/ece3.5559] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/15/2019] [Accepted: 07/19/2019] [Indexed: 11/06/2022] Open
Abstract
As human populations continue to expand across the world, the need to understand and manage wildlife populations within the wildland-urban interface is becoming commonplace. This is especially true for large carnivores as these species are not always tolerated by the public and can pose a risk to human safety. Unfortunately, information on wildlife species within the wildland-urban interface is sparse, and knowledge from wildland ecosystems does not always translate well to human-dominated systems. Across western North America, cougars (Puma concolor) are routinely utilizing wildland-urban habitats while human use of these areas for homes and recreation is increasing. From 2007 to 2015, we studied cougar resource selection, human-cougar interaction, and cougar conflict management within the wildland-urban landscape of the northern Front Range in Colorado, USA. Resource selection of cougars within this landscape was typical of cougars in more remote settings but cougar interactions with humans tended to occur in locations cougars typically selected against, especially those in proximity to human structures. Within higher housing density areas, 83% of cougar use occurred at night, suggesting cougars generally avoided human activity by partitioning time. Only 24% of monitored cougars were reported for some type of conflict behavior but 39% of cougars sampled during feeding site investigations of GPS collar data were found to consume domestic prey items. Aversive conditioning was difficult to implement and generally ineffective for altering cougar behaviors but was thought to potentially have long-term benefits of reinforcing fear of humans in cougars within human-dominated areas experiencing little cougar hunting pressure. Cougars are able to exploit wildland-urban landscapes effectively, and conflict is relatively uncommon compared with the proportion of cougar use. Individual characteristics and behaviors of cougars within these areas are highly varied; therefore, conflict management is unique to each situation and should target individual behaviors. The ability of individual cougars to learn to exploit these environments with minimal human-cougar interactions suggests that maintaining older age structures, especially females, and providing a matrix of habitats, including large connected open-space areas, would be beneficial to cougars and effectively reduce the potential for conflict.
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Buderman FE, Hooten MB, Alldredge MW, Hanks EM, Ivan JS. Time-varying predatory behavior is primary predictor of fine-scale movement of wildland-urban cougars. Mov Ecol 2018; 6:22. [PMID: 30410764 PMCID: PMC6214169 DOI: 10.1186/s40462-018-0140-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 09/26/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND While many species have suffered from the detrimental impacts of increasing human population growth, some species, such as cougars (Puma concolor), have been observed using human-modified landscapes. However, human-modified habitat can be a source of both increased risk and increased food availability, particularly for large carnivores. Assessing preferential use of the landscape is important for managing wildlife and can be particularly useful in transitional habitats, such as at the wildland-urban interface. Preferential use is often evaluated using resource selection functions (RSFs), which are focused on quantifying habitat preference using either a temporally static framework or researcher-defined temporal delineations. Many applications of RSFs do not incorporate time-varying landscape availability or temporally-varying behavior, which may mask conflict and avoidance behavior. METHODS Contemporary approaches to incorporate landscape availability into the assessment of habitat selection include spatio-temporal point process models, step selection functions, and continuous-time Markov chain (CTMC) models; in contrast with the other methods, the CTMC model allows for explicit inference on animal movement in continuous-time. We used a hierarchical version of the CTMC framework to model speed and directionality of fine-scale movement by a population of cougars inhabiting the Front Range of Colorado, U.S.A., an area exhibiting rapid population growth and increased recreational use, as a function of individual variation and time-varying responses to landscape covariates. RESULTS We found evidence for individual- and daily temporal-variability in cougar response to landscape characteristics. Distance to nearest kill site emerged as the most important driver of movement at a population-level. We also detected seasonal differences in average response to elevation, heat loading, and distance to roads. Motility was also a function of amount of development, with cougars moving faster in developed areas than in undeveloped areas. CONCLUSIONS The time-varying framework allowed us to detect temporal variability that would be masked in a generalized linear model, and improved the within-sample predictive ability of the model. The high degree of individual variation suggests that, if agencies want to minimize human-wildlife conflict management options should be varied and flexible. However, due to the effect of recursive behavior on cougar movement, likely related to the location and timing of potential kill-sites, kill-site identification tools may be useful for identifying areas of potential conflict.
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Affiliation(s)
- Frances E. Buderman
- Colorado State University, Departments of Fish, Wildlife, and Conservation Biology, 1484 Campus Delivery, Fort Collins, CO 80523 USA
| | - Mevin B Hooten
- U.S. Geological Survey, Colorado Cooperative Fish and Wildlife Research Unit, Departments of Fish, Wildlife, and Conservation Biology and Statistics, Colorado State University, 1484 Campus Delivery, Fort Collins, CO 80523 USA
| | - Mathew W Alldredge
- Colorado Parks and Wildlife, 317 W Prospect Road, Fort Collins, CO 80526 USA
| | - Ephraim M Hanks
- Pennsylvania State University, W-250 Millennium Science Complex, University Park, State College, PA 16802 USA
| | - Jacob S Ivan
- Colorado Parks and Wildlife, 317 W Prospect Road, Fort Collins, CO 80526 USA
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Hefley TJ, Broms KM, Brost BM, Buderman FE, Kay SL, Scharf HR, Tipton JR, Williams PJ, Hooten MB. The basis function approach for modeling autocorrelation in ecological data. Ecology 2017; 98:632-646. [PMID: 27935640 DOI: 10.1002/ecy.1674] [Citation(s) in RCA: 70] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 10/18/2016] [Accepted: 10/24/2016] [Indexed: 11/07/2022]
Abstract
Analyzing ecological data often requires modeling the autocorrelation created by spatial and temporal processes. Many seemingly disparate statistical methods used to account for autocorrelation can be expressed as regression models that include basis functions. Basis functions also enable ecologists to modify a wide range of existing ecological models in order to account for autocorrelation, which can improve inference and predictive accuracy. Furthermore, understanding the properties of basis functions is essential for evaluating the fit of spatial or time-series models, detecting a hidden form of collinearity, and analyzing large data sets. We present important concepts and properties related to basis functions and illustrate several tools and techniques ecologists can use when modeling autocorrelation in ecological data.
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Affiliation(s)
- Trevor J Hefley
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523 USA.,Department of Statistics, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Kristin M Broms
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Brian M Brost
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Frances E Buderman
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Shannon L Kay
- Department of Statistics, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Henry R Scharf
- Department of Statistics, Colorado State University, Fort Collins, Colorado 80523 USA
| | - John R Tipton
- Department of Statistics, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Perry J Williams
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523 USA.,Department of Statistics, Colorado State University, Fort Collins, Colorado 80523 USA
| | - Mevin B Hooten
- Department of Fish, Wildlife, and Conservation Biology, Colorado State University, Fort Collins, Colorado 80523 USA.,Department of Statistics, Colorado State University, Fort Collins, Colorado 80523 USA.,U.S. Geological Survey, Colorado Cooperative Fish and Wildlife Research Unit, Fort Collins, Colorado 80523 USA
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Affiliation(s)
- Frances E. Buderman
- Department of Fish, Wildlife, and Conservation Biology Colorado State University Fort Collins CO 80523‐1484 USA
| | - Mevin B. Hooten
- Department of Fish, Wildlife, and Conservation Biology Colorado State University Fort Collins CO 80523‐1484 USA
- U.S. Geological Survey Colorado Cooperative Fish and Wildlife Research Unit Colorado State University Fort Collins CO 80523‐1484 USA
- Department of Statistics Colorado State University Fort Collins CO 80523‐1484 USA
- Graduate Degree Program in Ecology Colorado State University Fort Collins CO 80523‐1484 USA
| | - Jacob S. Ivan
- Colorado Parks and Wildlife Fort Collins CO 80526 USA
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Buderman FE, Diefenbach DR, Rosenberry CS, Wallingford BD, Long ES. Effect of hunter selectivity on harvest rates of radio-collared white-tailed deer in Pennsylvania. J Wildl Manage 2014. [DOI: 10.1002/jwmg.779] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Frances E. Buderman
- Pennsylvania Cooperative Fish and Wildlife Research Unit; Pennsylvania State University; University Park PA 16802 USA
| | - Duane R. Diefenbach
- U.S. Geological Survey; Pennsylvania Cooperative Fish and Wildlife Research Unit; Pennsylvania State University; University Park PA 16802 USA
| | | | - Bret D. Wallingford
- Pennsylvania Game Commission; 2001 Elmerton Ave Harrisburg PA 17110-9797 USA
| | - Eric S. Long
- Seattle Pacific University; 3307 3rd Ave W Seattle WA 98119 USA
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Able KW, Grothues TM, Rackovan JL, Buderman FE. Application of Mobile Dual-frequency Identification Sonar (DIDSON) to Fish in Estuarine Habitats. Northeast Nat (Steuben) 2014. [DOI: 10.1656/045.021.0207] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Buderman FE, Diefenbach DR, Casalena MJ, Rosenberry CS, Wallingford BD. Accounting for tagging-to-harvest mortality in a Brownie tag-recovery model by incorporating radio-telemetry data. Ecol Evol 2014; 4:1439-50. [PMID: 24834339 PMCID: PMC4020702 DOI: 10.1002/ece3.1025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 01/23/2014] [Indexed: 11/23/2022] Open
Abstract
The Brownie tag-recovery model is useful for estimating harvest rates but assumes all tagged individuals survive to the first hunting season; otherwise, mortality between time of tagging and the hunting season will cause the Brownie estimator to be negatively biased. Alternatively, fitting animals with radio transmitters can be used to accurately estimate harvest rate but may be more costly. We developed a joint model to estimate harvest and annual survival rates that combines known-fate data from animals fitted with transmitters to estimate the probability of surviving the period from capture to the first hunting season, and data from reward-tagged animals in a Brownie tag-recovery model. We evaluated bias and precision of the joint estimator, and how to optimally allocate effort between animals fitted with radio transmitters and inexpensive ear tags or leg bands. Tagging-to-harvest survival rates from >20 individuals with radio transmitters combined with 50–100 reward tags resulted in an unbiased and precise estimator of harvest rates. In addition, the joint model can test whether transmitters affect an individual's probability of being harvested. We illustrate application of the model using data from wild turkey, Meleagris gallapavo, to estimate harvest rates, and data from white-tailed deer, Odocoileus virginianus, to evaluate whether the presence of a visible radio transmitter is related to the probability of a deer being harvested. The joint known-fate tag-recovery model eliminates the requirement to capture and mark animals immediately prior to the hunting season to obtain accurate and precise estimates of harvest rate. In addition, the joint model can assess whether marking animals with radio transmitters affects the individual's probability of being harvested, caused by hunter selectivity or changes in a marked animal's behavior.
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Affiliation(s)
- Frances E Buderman
- Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State UniversityUniversity Park, Pennsylvania, 16802
- Correspondence Frances E. Buderman, Colorado Cooperative Fish and Wildlife Research Unit, Department of Fish, Wildlife, and Conservation Biology, Fort Collins, CO 80523. Tel: 970-491-5396; Fax: 970-491-1413;, E-mail:
| | - Duane R Diefenbach
- U.S. Geological Survey Pennsylvania Cooperative Fish and Wildlife Research Unit, Pennsylvania State UniversityUniversity Park, Pennsylvania, 16802
| | - Mary Jo Casalena
- Pennsylvania Game Commission, Bureau of Wildlife Management2001 Elmerton Ave., Harrisburg, Pennsylvania, 17110
| | - Christopher S Rosenberry
- Pennsylvania Game Commission, Bureau of Wildlife Management2001 Elmerton Ave., Harrisburg, Pennsylvania, 17110
| | - Bret D Wallingford
- Pennsylvania Game Commission, Bureau of Wildlife Management2001 Elmerton Ave., Harrisburg, Pennsylvania, 17110
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Buderman FE, Liebgold EB. Effect of search method and age class on mark-recapture parameter estimation in a population of red-backed salamanders. POPUL ECOL 2011. [DOI: 10.1007/s10144-011-0294-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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