Data from: Age and sex-selective predation as moderators of the overall impact of predation
Currently, there is no general agreement about the extent to which predators' impact prey population dynamics, as 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...
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ftzenodo:oai:zenodo.org:5002732 2024-09-15T17:34:35+00:00 Data from: Age and sex-selective predation as moderators of the overall impact of predation Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. P. Marquiss, Michael Davison, Martin Lambin, Xavier 2015-10-16 https://doi.org/10.5061/dryad.h1289 unknown Zenodo https://doi.org/10.1111/1365-2656.12310 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.h1289 oai:zenodo.org:5002732 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode predatory interactions superpredator Strix aluco Accipiter gentilis 1985-2012 Microtus agrestis northern goshawk info:eu-repo/semantics/other 2015 ftzenodo https://doi.org/10.5061/dryad.h128910.1111/1365-2656.12310 2024-07-25T10:00:51Z Currently, there is no general agreement about the extent to which predators' impact prey population dynamics, as 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 colonised 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 overall impact of five different patterns of age-selective predation, including the pattern actually observed in the study site. The 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 colonisation 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 and that selective ... Other/Unknown Material Accipiter gentilis Northern Goshawk Zenodo |
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Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
predatory interactions superpredator Strix aluco Accipiter gentilis 1985-2012 Microtus agrestis northern goshawk |
spellingShingle |
predatory interactions superpredator Strix aluco Accipiter gentilis 1985-2012 Microtus agrestis northern goshawk Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. P. Marquiss, Michael Davison, Martin Lambin, Xavier Data from: Age and sex-selective predation as moderators of the overall impact of predation |
topic_facet |
predatory interactions superpredator Strix aluco Accipiter gentilis 1985-2012 Microtus agrestis northern goshawk |
description |
Currently, there is no general agreement about the extent to which predators' impact prey population dynamics, as 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 colonised 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 overall impact of five different patterns of age-selective predation, including the pattern actually observed in the study site. The 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 colonisation 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 and that selective ... |
format |
Other/Unknown Material |
author |
Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. P. Marquiss, Michael Davison, Martin Lambin, Xavier |
author_facet |
Hoy, Sarah R. Petty, Steve J. Millon, Alexandre Whitfield, D. P. Marquiss, Michael Davison, Martin Lambin, Xavier |
author_sort |
Hoy, Sarah R. |
title |
Data from: Age and sex-selective predation as moderators of the overall impact of predation |
title_short |
Data from: Age and sex-selective predation as moderators of the overall impact of predation |
title_full |
Data from: Age and sex-selective predation as moderators of the overall impact of predation |
title_fullStr |
Data from: Age and sex-selective predation as moderators of the overall impact of predation |
title_full_unstemmed |
Data from: Age and sex-selective predation as moderators of the overall impact of predation |
title_sort |
data from: age and sex-selective predation as moderators of the overall impact of predation |
publisher |
Zenodo |
publishDate |
2015 |
url |
https://doi.org/10.5061/dryad.h1289 |
genre |
Accipiter gentilis Northern Goshawk |
genre_facet |
Accipiter gentilis Northern Goshawk |
op_relation |
https://doi.org/10.1111/1365-2656.12310 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.h1289 oai:zenodo.org:5002732 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.h128910.1111/1365-2656.12310 |
_version_ |
1810491933983768576 |