Conservation biology for suites of species: Demographic modeling for Pacific island kingfishers

Kesler, Dylan C.; Haig, Susan M.

doi:10.1016/j.biocon.2006.12.023

Cited by 24 publications

(27 citation statements)

References 58 publications

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“…It is possible that species with sufficient demographic data to develop PVAs may serve as surrogates for listed species if they are sufficiently similar biologically (e.g. [60]), but the extent of similarity between these groups of species is unknown. Further, biologically similar species in the same landscape do not have similar abundances [48], and vital rates are likely more variable.…”

Section: Discussionmentioning

confidence: 99%

Testing Surrogacy Assumptions: Can Threatened and Endangered Plants Be Grouped by Biological Similarity and Abundances?

Che‐Castaldo

Neel

2012

PLoS ONE

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There is renewed interest in implementing surrogate species approaches in conservation planning due to the large number of species in need of management but limited resources and data. One type of surrogate approach involves selection of one or a few species to represent a larger group of species requiring similar management actions, so that protection and persistence of the selected species would result in conservation of the group of species. However, among the criticisms of surrogate approaches is the need to test underlying assumptions, which remain rarely examined. In this study, we tested one of the fundamental assumptions underlying use of surrogate species in recovery planning: that there exist groups of threatened and endangered species that are sufficiently similar to warrant similar management or recovery criteria. Using a comprehensive database of all plant species listed under the U.S. Endangered Species Act and tree-based random forest analysis, we found no evidence of species groups based on a set of distributional and biological traits or by abundances and patterns of decline. Our results suggested that application of surrogate approaches for endangered species recovery would be unjustified. Thus, conservation planning focused on individual species and their patterns of decline will likely be required to recover listed species.

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Section: Discussionmentioning

confidence: 99%

Testing Surrogacy Assumptions: Can Threatened and Endangered Plants Be Grouped by Biological Similarity and Abundances?

Che‐Castaldo

Neel

2012

PLoS ONE

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“…1; for details, see Anderson et al 2005). All birds were reliably aged as hatching-year (HY) birds (hereafter "juveniles") or as adults-that is, birds in any year after Estimating demographic rates is central to studying population dynamics (Saether and Bakke 2000, Saether et al 2002, Stahl and Oli 2006, life-history strategies (Sandercock et al 2005, Le Bohec et al 2007, and conservation ecology (Forsman et al 1996, Weimerskirch et al 1997, Kesler and Haig 2007. Population dynamics are strongly driven by survivorship and dispersal, and these demographic rates result from, and influence, the social and reproductive environment experienced by an organism (Emlen and Oring 1977, Clarke et al 1997, Pasinelli and Walters 2002.…”

Section: Methodsmentioning

confidence: 99%

Demography and dispersal of juvenile and adult Brown-headed Cowbirds (Molothrus ater) in the eastern Sierra Nevada, California, estimated using multistate models

Anderson

Fujiwara

Rothstein

2012

The Auk

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. University of California Press and AmericanOrnithologists' Union are collaborating with JSTOR to digitize, preserve and extend access to The Auk.Abstract.-Despite recent progress in avian demography, much still needs to be learned about patterns of survival and dispersal across different ages and sexes of birds. This is expressly true for Brown-headed Cowbirds (Molothrus ater) in light of their vagility and importance in the life history of many other bird species. We used multistate mark-recapture models to estimate annual survival and dispersal rates of Brownheaded Cowbirds across dialect subpopulations in the Sierra Nevada of California across the 1982-1988 breeding seasons. We estimated rates for male and female hatch-year (HY) and after-hatch-year (AHY) birds and found no evidence of differences in capture probabilities across sex and age states. To account for high apparent nonresidency, adult survival was estimated separately for the year following initial capture and for subsequent years. The latter estimates are near the midpoint of those from other studies (AHY females: 56.1%; after-second-year [ASY] males: 63.4%; second-year [SY] males: 32.9%). Survival estimates for HY birds are high for passerines (females: 24.6%; males: 25.3%), although they are largely consistent with estimates from long-term mark-recapture studies in other species. We found no evidence of sex-biased dispersal, although rates for HY birds (about 14-15%) were about 3× higher than those for adults (about 4-5%). Our study provides a more detailed understanding of the demography and dispersal of cowbirds, offering a platform for future research on the social behavior and ecology of this species and on possible strategies for its management.

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“…Although many methods exist (Morris & Doak, ), PVAs typically apply simulation‐based models to project the likely future demographic and genetic status of one or a collection of populations (Lacy, ; Lindenmayer, Clark, Lacy, & Thomas, ; Zeigler, Che‐Castaldo, & Neel, ). They are especially useful for comparing the long‐term effects of multiple management options, and have long been used to inform conservation decision‐making for a range of wild populations (e.g., Crouse, Crowder, & Caswell, ; Kesler & Haig, ). PVAs are also appropriate for evaluating zoo populations because they can accurately incorporate variability, limiting factors (such as holding space capacity), and management methods specific to zoo settings (e.g., Bustamante, ; Earnhardt et al, ).…”

Section: Introductionmentioning

confidence: 99%

Patterns in the long‐term viability of North American zoo populations

Che‐Castaldo

Johnson²,

Magrisso³

et al. 2019

Zoo Biology

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Recent concerns about the viability of zoo populations have motivated studies on the historic and current status of animal populations in North American and European zoos.However, these evaluations may not accurately reflect the populations' long-term viability in the decades to come. Here, we assessed the projected future status of North American zoo populations by conducting standardized population viability analyses (PVAs) for 137 cooperative breeding programs. We summarized PVA results to describe patterns in viability across populations, and examined whether viability can be predicted by biological or management-based factors. Under recent management practices and without imports or exports of animals, 64% of populations will decline in size over the next 25 years, and only 18% would retain ≥90% of the founding gene diversity (GD) in 100 years. However, viability would improve if programs can implement management changes (e.g., increasing reproduction, increasing holding space, and importing genetically unique individuals, as appropriate): only 16% of populations would still decline in 25 years, and 49% would retain ≥90% GD in 100 years. Programs with more participating institutions and a "green" Association of Zoos and Aquariums animal program designation were projected to have higher metrics of demographic viability, and those with longer lifespans and lower recent death rates were projected to have higher metrics of genetic viability. Due to the large variation in species life history, management goals, and constraints across programs, our findings suggest there is unlikely to be a single path to long-term viability that would be appropriate for all zoo populations. K E Y W O R D S demography, extinction risk, genetic diversity, population viability analysis, sustainability

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Conservation biology for suites of species: Demographic modeling for Pacific island kingfishers

Cited by 24 publications

References 58 publications

Testing Surrogacy Assumptions: Can Threatened and Endangered Plants Be Grouped by Biological Similarity and Abundances?

Testing Surrogacy Assumptions: Can Threatened and Endangered Plants Be Grouped by Biological Similarity and Abundances?

Demography and dispersal of juvenile and adult Brown-headed Cowbirds (Molothrus ater) in the eastern Sierra Nevada, California, estimated using multistate models

Patterns in the long‐term viability of North American zoo populations

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