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...
Main Authors: | , , , , |
---|---|
Format: | Other/Unknown Material |
Language: | unknown |
Published: |
Zenodo
2015
|
Subjects: | |
Online Access: | https://doi.org/10.5061/dryad.9g2p2 |
id |
ftzenodo:oai:zenodo.org:4979579 |
---|---|
record_format |
openpolar |
spelling |
ftzenodo:oai:zenodo.org:4979579 2024-09-15T17:36:14+00:00 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 2015-07-03 https://doi.org/10.5061/dryad.9g2p2 unknown Zenodo https://doi.org/10.1111/1365-2656.12280 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.9g2p2 oai:zenodo.org:4979579 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Alces alces moose Capreolus capreolus numerical response Scavenging faecal pellet group count hunting success kill handling time social organisation optimal foraging present Canis lupus info:eu-repo/semantics/other 2015 ftzenodo https://doi.org/10.5061/dryad.9g2p210.1111/1365-2656.12280 2024-07-26T09:53:44Z 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-data This 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_puppies This file ... Other/Unknown Material Alces alces Canis lupus Zenodo |
institution |
Open Polar |
collection |
Zenodo |
op_collection_id |
ftzenodo |
language |
unknown |
topic |
Alces alces moose Capreolus capreolus numerical response Scavenging faecal pellet group count hunting success kill handling time social organisation optimal foraging present Canis lupus |
spellingShingle |
Alces alces moose Capreolus capreolus numerical response Scavenging faecal pellet group count hunting success kill handling time social organisation optimal foraging present Canis lupus 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 |
Alces alces moose Capreolus capreolus numerical response Scavenging faecal pellet group count hunting success kill handling time social organisation optimal foraging present Canis lupus |
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-data This 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_puppies This file ... |
format |
Other/Unknown Material |
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 |
Zenodo |
publishDate |
2015 |
url |
https://doi.org/10.5061/dryad.9g2p2 |
genre |
Alces alces Canis lupus |
genre_facet |
Alces alces Canis lupus |
op_relation |
https://doi.org/10.1111/1365-2656.12280 https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.9g2p2 oai:zenodo.org:4979579 |
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.9g2p210.1111/1365-2656.12280 |
_version_ |
1810488048893296640 |