Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing
The functional response of a predator describes the change in per capita kill rate to changes in prey density. This response can be influenced by predator densities, giving a predator-dependent functional response. In social carnivores which defend a territory, kill rates also depend on the individu...
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Online Access: | https://doi.org/10.5061/dryad.9g2p2 |
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fttriple:oai:gotriple.eu:50|dedup_wf_001::44aca6aa6a653ca54ab0bc1fc3f72142 2023-05-15T13:13:11+02:00 Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing Zimmermann, Barbara Sand, Håkan Wabakken, Petter Liberg, Olof Andreassen, Harry Petter 2015-01-01 https://doi.org/10.5061/dryad.9g2p2 undefined unknown Dryad Digital Repository https://dx.doi.org/10.5061/dryad.9g2p2 http://dx.doi.org/10.5061/dryad.9g2p2 lic_creative-commons 10.5061/dryad.9g2p2 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:86255 oai:easy.dans.knaw.nl:easy-dataset:86255 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c faecal pellet group count hunting success kill handling time moose numerical response optimal foraging predation scavenging social organisation Scandinavia Present Canis lupus Alces alces Capreolus capreolus Life sciences medicine and health care envir geo Dataset https://vocabularies.coar-repositories.org/resource_types/c_ddb1/ 2015 fttriple https://doi.org/10.5061/dryad.9g2p2 2023-01-22T16:50:49Z The functional response of a predator describes the change in per capita kill rate to changes in prey density. This response can be influenced by predator densities, giving a predator-dependent functional response. In social carnivores which defend a territory, kill rates also depend on the individual energetic requirements of group members and their contribution to the kill rate. This study aims to provide empirical data for the functional response of wolves Canis lupus to the highly managed moose Alces alces population in Scandinavia. We explored prey and predator dependence, and how the functional response relates to the energetic requirements of wolf packs. Winter kill rates of GPS-collared wolves and densities of cervids were estimated for a total of 22 study periods in 15 wolf territories. The adult wolves were identified as the individuals responsible for providing kills to the wolf pack, while pups could be described as inept hunters. The predator-dependent, asymptotic functional response models (i.e. Hassell-Varley type II and Crowley-Martin) performed best among a set of 23 competing linear, asymptotic and sigmoid models. Small wolf packs acquired > 3 times as much moose biomass as required to sustain their field metabolic rate (FMR), even at relatively low moose abundances. Large packs (6 - 9 wolves) acquired less biomass than required in territories with low moose abundance. We suggest the surplus-killing by small packs is a result of an optimal foraging strategy to consume only the most nutritious parts of easy accessible prey while avoiding the risk of being detected by humans. Food limitation may have a stabilizing effect on pack size in wolves, as supported by the observed negative relationship between body weight of pups and pack size. Killrate-dataThis file contains for each study period ("pack-winter") data associated to kill rate and prey availabilty. It is the basis for the functional response models in the article. Variables are described in the ReadMe file.weight_puppiesThis file ... Dataset Alces alces Canis lupus Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
unknown |
topic |
faecal pellet group count hunting success kill handling time moose numerical response optimal foraging predation scavenging social organisation Scandinavia Present Canis lupus Alces alces Capreolus capreolus Life sciences medicine and health care envir geo |
spellingShingle |
faecal pellet group count hunting success kill handling time moose numerical response optimal foraging predation scavenging social organisation Scandinavia Present Canis lupus Alces alces Capreolus capreolus Life sciences medicine and health care envir geo Zimmermann, Barbara Sand, Håkan Wabakken, Petter Liberg, Olof Andreassen, Harry Petter Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing |
topic_facet |
faecal pellet group count hunting success kill handling time moose numerical response optimal foraging predation scavenging social organisation Scandinavia Present Canis lupus Alces alces Capreolus capreolus Life sciences medicine and health care envir geo |
description |
The functional response of a predator describes the change in per capita kill rate to changes in prey density. This response can be influenced by predator densities, giving a predator-dependent functional response. In social carnivores which defend a territory, kill rates also depend on the individual energetic requirements of group members and their contribution to the kill rate. This study aims to provide empirical data for the functional response of wolves Canis lupus to the highly managed moose Alces alces population in Scandinavia. We explored prey and predator dependence, and how the functional response relates to the energetic requirements of wolf packs. Winter kill rates of GPS-collared wolves and densities of cervids were estimated for a total of 22 study periods in 15 wolf territories. The adult wolves were identified as the individuals responsible for providing kills to the wolf pack, while pups could be described as inept hunters. The predator-dependent, asymptotic functional response models (i.e. Hassell-Varley type II and Crowley-Martin) performed best among a set of 23 competing linear, asymptotic and sigmoid models. Small wolf packs acquired > 3 times as much moose biomass as required to sustain their field metabolic rate (FMR), even at relatively low moose abundances. Large packs (6 - 9 wolves) acquired less biomass than required in territories with low moose abundance. We suggest the surplus-killing by small packs is a result of an optimal foraging strategy to consume only the most nutritious parts of easy accessible prey while avoiding the risk of being detected by humans. Food limitation may have a stabilizing effect on pack size in wolves, as supported by the observed negative relationship between body weight of pups and pack size. Killrate-dataThis file contains for each study period ("pack-winter") data associated to kill rate and prey availabilty. It is the basis for the functional response models in the article. Variables are described in the ReadMe file.weight_puppiesThis file ... |
format |
Dataset |
author |
Zimmermann, Barbara Sand, Håkan Wabakken, Petter Liberg, Olof Andreassen, Harry Petter |
author_facet |
Zimmermann, Barbara Sand, Håkan Wabakken, Petter Liberg, Olof Andreassen, Harry Petter |
author_sort |
Zimmermann, Barbara |
title |
Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing |
title_short |
Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing |
title_full |
Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing |
title_fullStr |
Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing |
title_full_unstemmed |
Data from: Predator-dependent functional response in wolves: from food limitation to surplus killing |
title_sort |
data from: predator-dependent functional response in wolves: from food limitation to surplus killing |
publisher |
Dryad Digital Repository |
publishDate |
2015 |
url |
https://doi.org/10.5061/dryad.9g2p2 |
genre |
Alces alces Canis lupus |
genre_facet |
Alces alces Canis lupus |
op_source |
10.5061/dryad.9g2p2 oai:services.nod.dans.knaw.nl:Products/dans:oai:easy.dans.knaw.nl:easy-dataset:86255 oai:easy.dans.knaw.nl:easy-dataset:86255 10|openaire____::9e3be59865b2c1c335d32dae2fe7b254 re3data_____::r3d100000044 10|eurocrisdris::fe4903425d9040f680d8610d9079ea14 10|re3data_____::94816e6421eeb072e7742ce6a9decc5f 10|re3data_____::84e123776089ce3c7a33db98d9cd15a8 10|openaire____::081b82f96300b6a6e3d282bad31cb6e2 10|opendoar____::8b6dd7db9af49e67306feb59a8bdc52c |
op_relation |
https://dx.doi.org/10.5061/dryad.9g2p2 http://dx.doi.org/10.5061/dryad.9g2p2 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.5061/dryad.9g2p2 |
_version_ |
1766256558724874240 |