Age and sex-selective predation moderate the overall impact of predators
International audience Currently, there is no general agreement about the extent to which predators impact prey population dynamics and it is often poorly predicted by predation rates and species abundances. This could, in part be caused by variation in the type of selective predation occurring. Not...
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Online Access: | https://hal.archives-ouvertes.fr/hal-01444879 https://doi.org/10.1111/1365-2656.12310 |
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ftccsdartic:oai:HAL:hal-01444879v1 2023-05-15T13:00:52+02:00 Age and sex-selective predation moderate the overall impact of predators Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. Philip Marquiss, Michael Davison, Martin Lambin, Xavier School of Biological Sciences University of Aberdeen Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement IRD : UMR237-Aix Marseille Université (AMU)-Avignon Université (AU) School of Biological Sciences (APERU) 2015-05 https://hal.archives-ouvertes.fr/hal-01444879 https://doi.org/10.1111/1365-2656.12310 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2656.12310 hal-01444879 https://hal.archives-ouvertes.fr/hal-01444879 doi:10.1111/1365-2656.12310 ISSN: 0021-8790 EISSN: 1365-2656 Journal of Animal Ecology https://hal.archives-ouvertes.fr/hal-01444879 Journal of Animal Ecology, Wiley, 2015, 84 (3), pp.692--701. ⟨10.1111/1365-2656.12310⟩ [SDE.BE]Environmental Sciences/Biodiversity and Ecology info:eu-repo/semantics/article Journal articles 2015 ftccsdartic https://doi.org/10.1111/1365-2656.12310 2021-10-24T09:10:07Z International audience Currently, there is no general agreement about the extent to which predators impact prey population dynamics and it is often poorly predicted by predation rates and species abundances. This could, in part be caused by variation in the type of selective predation occurring. Notably, if predation is selective on categories of individuals that contribute little to future generations, it may moderate the impact of predation on prey population dynamics. However, despite its prevalence, selective predation has seldom been studied in this context. Using recoveries of ringed tawny owls (Strix aluco) predated by superpredators', northern goshawks (Accipiter gentilis) as they colonized the area, we investigated the extent to which predation was sex and age-selective. Predation of juvenile owls was disproportionately high. Amongst adults, predation was strongly biased towards females and predation risk appeared to increase with age. This implies age-selective predation may shape the decline in survival with age, observed in tawny owls. To determine whether selective predation can modulate the overall impact of predation, age-based population matrix models were used to simulate the impact of five different patterns of age-selective predation, including the pattern actually observed in the study site. The overall impact on owl population size varied by up to 50%, depending on the pattern of selective predation. The simulation of the observed pattern of predation had a relatively small impact on population size, close to the least harmful scenario, predation on juveniles only. The actual changes in owl population size and structure observed during goshawk colonization were also analysed. Owl population size and immigration were unrelated to goshawk abundance. However, goshawk abundance appeared to interact with owl food availability to have a delayed effect on recruitment into the population. This study provides strong evidence to suggest that predation of other predators is both age and sex-selective ... Article in Journal/Newspaper Accipiter gentilis Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Journal of Animal Ecology 84 3 692 701 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
spellingShingle |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. Philip Marquiss, Michael Davison, Martin Lambin, Xavier Age and sex-selective predation moderate the overall impact of predators |
topic_facet |
[SDE.BE]Environmental Sciences/Biodiversity and Ecology |
description |
International audience Currently, there is no general agreement about the extent to which predators impact prey population dynamics and it is often poorly predicted by predation rates and species abundances. This could, in part be caused by variation in the type of selective predation occurring. Notably, if predation is selective on categories of individuals that contribute little to future generations, it may moderate the impact of predation on prey population dynamics. However, despite its prevalence, selective predation has seldom been studied in this context. Using recoveries of ringed tawny owls (Strix aluco) predated by superpredators', northern goshawks (Accipiter gentilis) as they colonized the area, we investigated the extent to which predation was sex and age-selective. Predation of juvenile owls was disproportionately high. Amongst adults, predation was strongly biased towards females and predation risk appeared to increase with age. This implies age-selective predation may shape the decline in survival with age, observed in tawny owls. To determine whether selective predation can modulate the overall impact of predation, age-based population matrix models were used to simulate the impact of five different patterns of age-selective predation, including the pattern actually observed in the study site. The overall impact on owl population size varied by up to 50%, depending on the pattern of selective predation. The simulation of the observed pattern of predation had a relatively small impact on population size, close to the least harmful scenario, predation on juveniles only. The actual changes in owl population size and structure observed during goshawk colonization were also analysed. Owl population size and immigration were unrelated to goshawk abundance. However, goshawk abundance appeared to interact with owl food availability to have a delayed effect on recruitment into the population. This study provides strong evidence to suggest that predation of other predators is both age and sex-selective ... |
author2 |
School of Biological Sciences University of Aberdeen Institut méditerranéen de biodiversité et d'écologie marine et continentale (IMBE) Centre National de la Recherche Scientifique (CNRS)-Institut de recherche pour le développement IRD : UMR237-Aix Marseille Université (AMU)-Avignon Université (AU) School of Biological Sciences (APERU) |
format |
Article in Journal/Newspaper |
author |
Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. Philip Marquiss, Michael Davison, Martin Lambin, Xavier |
author_facet |
Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. Philip Marquiss, Michael Davison, Martin Lambin, Xavier |
author_sort |
Hoy, Sarah R. |
title |
Age and sex-selective predation moderate the overall impact of predators |
title_short |
Age and sex-selective predation moderate the overall impact of predators |
title_full |
Age and sex-selective predation moderate the overall impact of predators |
title_fullStr |
Age and sex-selective predation moderate the overall impact of predators |
title_full_unstemmed |
Age and sex-selective predation moderate the overall impact of predators |
title_sort |
age and sex-selective predation moderate the overall impact of predators |
publisher |
HAL CCSD |
publishDate |
2015 |
url |
https://hal.archives-ouvertes.fr/hal-01444879 https://doi.org/10.1111/1365-2656.12310 |
genre |
Accipiter gentilis |
genre_facet |
Accipiter gentilis |
op_source |
ISSN: 0021-8790 EISSN: 1365-2656 Journal of Animal Ecology https://hal.archives-ouvertes.fr/hal-01444879 Journal of Animal Ecology, Wiley, 2015, 84 (3), pp.692--701. ⟨10.1111/1365-2656.12310⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/1365-2656.12310 hal-01444879 https://hal.archives-ouvertes.fr/hal-01444879 doi:10.1111/1365-2656.12310 |
op_doi |
https://doi.org/10.1111/1365-2656.12310 |
container_title |
Journal of Animal Ecology |
container_volume |
84 |
container_issue |
3 |
container_start_page |
692 |
op_container_end_page |
701 |
_version_ |
1766262362317258752 |