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 is s...
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ftdryad:oai:v1.datadryad.org:10255/dryad.72614 2023-05-15T13:00:56+02:00 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 Kielder Forest Northern England UK 1985-2012 2014-10-30T18:59:09Z http://hdl.handle.net/10255/dryad.72614 https://doi.org/10.5061/dryad.h1289 unknown doi:10.5061/dryad.h1289/1 doi:10.1111/1365-2656.12310 PMID:25334013 doi:10.5061/dryad.h1289 Hoy SR, Petty SJ, Millon A, Whitfield DP, Marquiss M, Davison M, Lambin X (2015) Age and sex-selective predation as moderators of the overall impact of predation. Journal of Animal Ecology 84(3): 692-701. http://hdl.handle.net/10255/dryad.72614 mesopredator northern goshawk population dynamics predatory interactions recruitment senescence superpredator reproductive costs Article 2014 ftdryad https://doi.org/10.5061/dryad.h1289 https://doi.org/10.5061/dryad.h1289/1 https://doi.org/10.1111/1365-2656.12310 2020-01-01T15:12:40Z 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 predation of individuals with a low reproductive value may mitigate the overall impact of predators on prey population dynamics. Consequently, our results highlight how accounting for the type of selective predation occurring is likely to improve future predictions of the overall impact of predation. Article in Journal/Newspaper Accipiter gentilis Northern Goshawk Dryad Digital Repository (Duke University) |
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Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
mesopredator northern goshawk population dynamics predatory interactions recruitment senescence superpredator reproductive costs |
spellingShingle |
mesopredator northern goshawk population dynamics predatory interactions recruitment senescence superpredator reproductive costs 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 |
mesopredator northern goshawk population dynamics predatory interactions recruitment senescence superpredator reproductive costs |
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 predation of individuals with a low reproductive value may mitigate the overall impact of predators on prey population dynamics. Consequently, our results highlight how accounting for the type of selective predation occurring is likely to improve future predictions of the overall impact of predation. |
format |
Article in Journal/Newspaper |
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 |
publishDate |
2014 |
url |
http://hdl.handle.net/10255/dryad.72614 https://doi.org/10.5061/dryad.h1289 |
op_coverage |
Kielder Forest Northern England UK 1985-2012 |
genre |
Accipiter gentilis Northern Goshawk |
genre_facet |
Accipiter gentilis Northern Goshawk |
op_relation |
doi:10.5061/dryad.h1289/1 doi:10.1111/1365-2656.12310 PMID:25334013 doi:10.5061/dryad.h1289 Hoy SR, Petty SJ, Millon A, Whitfield DP, Marquiss M, Davison M, Lambin X (2015) Age and sex-selective predation as moderators of the overall impact of predation. Journal of Animal Ecology 84(3): 692-701. http://hdl.handle.net/10255/dryad.72614 |
op_doi |
https://doi.org/10.5061/dryad.h1289 https://doi.org/10.5061/dryad.h1289/1 https://doi.org/10.1111/1365-2656.12310 |
_version_ |
1766264415096668160 |