Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics
We examined individual heterogeneity in survival and recruitment of female Pacific black brant (Branta bernicla nigricans) using frailty models adapted to a capture–mark–recapture context. Our main objectives were (1) to quantify levels of heterogeneity and examine factors affecting heterogeneity, a...
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ftpubmed:oai:pubmedcentral.nih.gov:3853552 2023-05-15T15:46:08+02:00 Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics Lindberg, Mark S Sedinger, James S Lebreton, Jean-Dominique 2013-10 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3853552 http://www.ncbi.nlm.nih.gov/pubmed/24324858 https://doi.org/10.1002/ece3.767 en eng Blackwell Publishing Ltd http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3853552 http://www.ncbi.nlm.nih.gov/pubmed/24324858 http://dx.doi.org/10.1002/ece3.767 © 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. CC-BY Original Research Text 2013 ftpubmed https://doi.org/10.1002/ece3.767 2013-12-15T01:39:36Z We examined individual heterogeneity in survival and recruitment of female Pacific black brant (Branta bernicla nigricans) using frailty models adapted to a capture–mark–recapture context. Our main objectives were (1) to quantify levels of heterogeneity and examine factors affecting heterogeneity, and (2) model the effects of individual heterogeneity on harvest dynamics through matrix models. We used 24 years of data on brant marked and recaptured at the Tutakoke River colony, AK. Multievent models were fit as hidden Markov chain using program E-SURGE with an adequate overdispersion coefficient. Annual survival of individuals marked as goslings was heterogeneous among individuals and year specific with about 0.23 difference in survival between “high” (0.73)- and “low” (0.50)-quality individuals at average survival probability. Adult survival (0.85 ± 0.004) was homogeneous and higher than survival of both groups of juveniles. The annual recruitment probability was heterogeneous for brant >1-year-old; 0.56 (±0.21) and 0.31 (±0.03) for high- and low-quality individuals, respectively. Assuming equal clutch sizes for high- and low-quality individuals and that 80% of offspring were in the same quality class as the breeding female resulted in reproductive values about twice as high for high-quality individuals than low-quality individual for a given class of individuals producing differential contributions to population growth among groups. Differences in reproductive values greatly increased when we assumed high-quality individuals had larger clutch sizes. When we assumed that 50% of offspring were in the same quality class as their mothers and clutches were equal, differences in reproductive values between quality classes were greatly reduced or eliminated (breeders [BRs]). We considered several harvest scenarios using the assumption that 80% of offspring were in the same quality class as their mothers. The amount of compensation for harvest mortality declined as the proportion of high-quality individuals in the ... Text Branta bernicla PubMed Central (PMC) Pacific Ecology and Evolution 3 12 4045 4056 |
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Original Research Lindberg, Mark S Sedinger, James S Lebreton, Jean-Dominique Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
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Original Research |
description |
We examined individual heterogeneity in survival and recruitment of female Pacific black brant (Branta bernicla nigricans) using frailty models adapted to a capture–mark–recapture context. Our main objectives were (1) to quantify levels of heterogeneity and examine factors affecting heterogeneity, and (2) model the effects of individual heterogeneity on harvest dynamics through matrix models. We used 24 years of data on brant marked and recaptured at the Tutakoke River colony, AK. Multievent models were fit as hidden Markov chain using program E-SURGE with an adequate overdispersion coefficient. Annual survival of individuals marked as goslings was heterogeneous among individuals and year specific with about 0.23 difference in survival between “high” (0.73)- and “low” (0.50)-quality individuals at average survival probability. Adult survival (0.85 ± 0.004) was homogeneous and higher than survival of both groups of juveniles. The annual recruitment probability was heterogeneous for brant >1-year-old; 0.56 (±0.21) and 0.31 (±0.03) for high- and low-quality individuals, respectively. Assuming equal clutch sizes for high- and low-quality individuals and that 80% of offspring were in the same quality class as the breeding female resulted in reproductive values about twice as high for high-quality individuals than low-quality individual for a given class of individuals producing differential contributions to population growth among groups. Differences in reproductive values greatly increased when we assumed high-quality individuals had larger clutch sizes. When we assumed that 50% of offspring were in the same quality class as their mothers and clutches were equal, differences in reproductive values between quality classes were greatly reduced or eliminated (breeders [BRs]). We considered several harvest scenarios using the assumption that 80% of offspring were in the same quality class as their mothers. The amount of compensation for harvest mortality declined as the proportion of high-quality individuals in the ... |
format |
Text |
author |
Lindberg, Mark S Sedinger, James S Lebreton, Jean-Dominique |
author_facet |
Lindberg, Mark S Sedinger, James S Lebreton, Jean-Dominique |
author_sort |
Lindberg, Mark S |
title |
Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
title_short |
Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
title_full |
Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
title_fullStr |
Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
title_full_unstemmed |
Individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
title_sort |
individual heterogeneity in black brant survival and recruitment with implications for harvest dynamics |
publisher |
Blackwell Publishing Ltd |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3853552 http://www.ncbi.nlm.nih.gov/pubmed/24324858 https://doi.org/10.1002/ece3.767 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Branta bernicla |
genre_facet |
Branta bernicla |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3853552 http://www.ncbi.nlm.nih.gov/pubmed/24324858 http://dx.doi.org/10.1002/ece3.767 |
op_rights |
© 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd http://creativecommons.org/licenses/by/2.5/ Re-use of this article is permitted in accordance with the Creative Commons Deed, Attribution 2.5, which does not permit commercial exploitation. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.767 |
container_title |
Ecology and Evolution |
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3 |
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12 |
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4045 |
op_container_end_page |
4056 |
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1766380821643526144 |