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Temporal effects of hunting on foraging behavior of an apex predator: Do bears forego foraging when risk is high?

作者信息

Hertel Anne G, Zedrosser Andreas, Mysterud Atle, Støen Ole-Gunnar, Steyaert Sam M J G, Swenson Jon E

机构信息

Department of Ecology and Natural Resource Management, Norwegian University of Life Sciences, 1430, Ås, Norway.

Department of Environmental and Health Sciences, Telemark University College, 3800, Bø, Norway.

出版信息

Oecologia. 2016 Dec;182(4):1019-1029. doi: 10.1007/s00442-016-3729-8. Epub 2016 Sep 30.


DOI:10.1007/s00442-016-3729-8
PMID:27696003
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5061844/
Abstract

Avoiding predators most often entails a food cost. For the Scandinavian brown bear (Ursus arctos), the hunting season coincides with the period of hyperphagia. Hunting mortality risk is not uniformly distributed throughout the day, but peaks in the early morning hours. As bears must increase mass for winter survival, they should be sensitive to temporal allocation of antipredator responses to periods of highest risk. We expected bears to reduce foraging activity at the expense of food intake in the morning hours when risk was high, but not in the afternoon, when risk was low. We used fine-scale GPS-derived activity patterns during the 2 weeks before and after the onset of the annual bear hunting season. At locations of probable foraging, we assessed abundance and sugar content, of bilberry (Vaccinium myrtillus), the most important autumn food resource for bears in this area. Bears decreased their foraging activity in the morning hours of the hunting season. Likewise, they foraged less efficiently and on poorer quality berries in the morning. Neither of our foraging measures were affected by hunting in the afternoon foraging bout, indicating that bears did not allocate antipredator behavior to times of comparably lower risk. Bears effectively responded to variation in risk on the scale of hours. This entailed a measurable foraging cost. The additive effect of reduced foraging activity, reduced forage intake, and lower quality food may result in poorer body condition upon den entry and may ultimately reduce reproductive success.

摘要
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/1b514ecd2cf4/442_2016_3729_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/adb4a2c1fa1e/442_2016_3729_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/403baeed9fcc/442_2016_3729_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/033d632fde46/442_2016_3729_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/1b514ecd2cf4/442_2016_3729_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/adb4a2c1fa1e/442_2016_3729_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/403baeed9fcc/442_2016_3729_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/033d632fde46/442_2016_3729_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e6ef/5061844/1b514ecd2cf4/442_2016_3729_Fig4_HTML.jpg

相似文献

[1]
Temporal effects of hunting on foraging behavior of an apex predator: Do bears forego foraging when risk is high?

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引用本文的文献

[1]
Acceleration Data Reveal Behavioural Responses to Hunting Risk in Scandinavian Brown Bears.

Ecol Evol. 2025-6-4

[2]
Behavioural responses of brown bears to roads and hunting disturbance.

Ecol Evol. 2024-6-14

[3]
Landscape of fear or landscape of food? Moose hunting triggers an antipredator response in brown bears.

Ecol Appl. 2023-6

[4]
Movement and habitat selection of a large carnivore in response to human infrastructure differs by life stage.

Mov Ecol. 2022-11-29

[5]
Seasonality in Biological Rhythms in Scandinavian brown Bears.

Front Physiol. 2022-4-7

[6]
Seasonal and diel movement patterns of brown bears in a population in southeastern Europe.

Ecol Evol. 2021-10-28

[7]
Physiological and behavioural responses of moose to hunting with dogs.

Conserv Physiol. 2020-12-30

[8]
Hunters select for behavioral traits in a large carnivore.

Sci Rep. 2019-8-26

[9]
High frequency GPS bursts and path-level analysis reveal linear feature tracking by red foxes.

Sci Rep. 2019-6-20

[10]
Seasonal and predator-prey effects on circadian activity of free-ranging mammals revealed by camera traps.

PeerJ. 2018-11-21

本文引用的文献

[1]
Effects of Roads and Human Disturbance on Amur Tigers.

Conserv Biol. 2002-2

[2]
Temporal Variation in Danger Drives Antipredator Behavior: The Predation Risk Allocation Hypothesis.

Am Nat. 1999-6

[3]
Bears and berries: species-specific selective foraging on a patchily distributed food resource in a human-altered landscape.

Behav Ecol Sociobiol. 2016

[4]
Hunted carnivores at outsized risk.

Science. 2015-10-30

[5]
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Science. 2015-8-21

[6]
GPS based daily activity patterns in European red deer and North American elk (Cervus elaphus): indication for a weak circadian clock in ungulates.

PLoS One. 2014-9-10

[7]
Status and ecological effects of the world's largest carnivores.

Science. 2014-1-10

[8]
Effects of humans on behaviour of wildlife exceed those of natural predators in a landscape of fear.

PLoS One. 2012-11-28

[9]
Human selection of elk behavioural traits in a landscape of fear.

Proc Biol Sci. 2012-9-5

[10]
Predators or prey? Spatio-temporal discrimination of human-derived risk by brown bears.

Oecologia. 2011-2-6

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