The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears
There is increasing evidence of indirect effects of hunting on populations. In species with sexually selected infanticide (SSI), hunting may decrease juvenile survival by increasing male turnover. We aimed to evaluate the relative importance of direct and indirect effects of hunting via SSI on the p...
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ftpubmed:oai:pubmedcentral.nih.gov:4262167 2023-05-15T18:42:07+02:00 The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears Gosselin, Jacinthe Zedrosser, Andreas Swenson, Jon E. Pelletier, Fanie 2015-01-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4262167 http://www.ncbi.nlm.nih.gov/pubmed/25392469 https://doi.org/10.1098/rspb.2014.1840 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/25392469 http://dx.doi.org/10.1098/rspb.2014.1840 http://creativecommons.org/licenses/by/4.0/ © 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Research Articles Text 2015 ftpubmed https://doi.org/10.1098/rspb.2014.1840 2015-01-11T00:55:24Z There is increasing evidence of indirect effects of hunting on populations. In species with sexually selected infanticide (SSI), hunting may decrease juvenile survival by increasing male turnover. We aimed to evaluate the relative importance of direct and indirect effects of hunting via SSI on the population dynamics of the Scandinavian brown bear (Ursus arctos). We performed prospective and retrospective demographic perturbation analyses for periods with low and high hunting pressures. All demographic rates, except yearling survival, were lower under high hunting pressure, which led to a decline in population growth under high hunting pressure (λ = 0.975; 95% CI = 0.914–1.011). Hunting had negative indirect effects on the population through an increase in SSI, which lowered cub survival and possibly also fecundity rates. Our study suggests that SSI could explain 13.6% of the variation in population growth. Hunting also affected the relative importance of survival and fecundity of adult females for population growth, with fecundity being more important under low hunting pressure and survival more important under high hunting pressure. Our study sheds light on the importance of direct and indirect effects of hunting on population dynamics, and supports the contention that hunting can have indirect negative effects on populations through SSI. Text Ursus arctos PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 282 1798 20141840 |
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Research Articles Gosselin, Jacinthe Zedrosser, Andreas Swenson, Jon E. Pelletier, Fanie The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
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Research Articles |
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There is increasing evidence of indirect effects of hunting on populations. In species with sexually selected infanticide (SSI), hunting may decrease juvenile survival by increasing male turnover. We aimed to evaluate the relative importance of direct and indirect effects of hunting via SSI on the population dynamics of the Scandinavian brown bear (Ursus arctos). We performed prospective and retrospective demographic perturbation analyses for periods with low and high hunting pressures. All demographic rates, except yearling survival, were lower under high hunting pressure, which led to a decline in population growth under high hunting pressure (λ = 0.975; 95% CI = 0.914–1.011). Hunting had negative indirect effects on the population through an increase in SSI, which lowered cub survival and possibly also fecundity rates. Our study suggests that SSI could explain 13.6% of the variation in population growth. Hunting also affected the relative importance of survival and fecundity of adult females for population growth, with fecundity being more important under low hunting pressure and survival more important under high hunting pressure. Our study sheds light on the importance of direct and indirect effects of hunting on population dynamics, and supports the contention that hunting can have indirect negative effects on populations through SSI. |
format |
Text |
author |
Gosselin, Jacinthe Zedrosser, Andreas Swenson, Jon E. Pelletier, Fanie |
author_facet |
Gosselin, Jacinthe Zedrosser, Andreas Swenson, Jon E. Pelletier, Fanie |
author_sort |
Gosselin, Jacinthe |
title |
The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
title_short |
The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
title_full |
The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
title_fullStr |
The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
title_full_unstemmed |
The relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
title_sort |
relative importance of direct and indirect effects of hunting mortality on the population dynamics of brown bears |
publisher |
The Royal Society |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4262167 http://www.ncbi.nlm.nih.gov/pubmed/25392469 https://doi.org/10.1098/rspb.2014.1840 |
genre |
Ursus arctos |
genre_facet |
Ursus arctos |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/25392469 http://dx.doi.org/10.1098/rspb.2014.1840 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ © 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rspb.2014.1840 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
282 |
container_issue |
1798 |
container_start_page |
20141840 |
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1766231731593019392 |