Data from: Caribou avoiding wolves face increased predation by bears – caught between Scylla and Charybdis ...
1. Prey may trade off resource acquisition with mortality risk by using various habitat-selection strategies. Empirical assessments have shown that the functional and numerical responses of predators to human disturbances are variable, yet spatial changes in predation risk by two predators have seld...
| Main Authors: | , , , |
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| Format: | Dataset |
| Language: | English |
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Dryad
2017
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.5061/dryad.27sk5 https://datadryad.org/stash/dataset/doi:10.5061/dryad.27sk5 |
| Summary: | 1. Prey may trade off resource acquisition with mortality risk by using various habitat-selection strategies. Empirical assessments have shown that the functional and numerical responses of predators to human disturbances are variable, yet spatial changes in predation risk by two predators have seldom been studied for prey occurring in human-modified landscapes. Using the boreal caribou (Rangifer tarandus caribou) – grey wolf (Canis lupus) – black bear (Ursus americanus) system in eastern Canada, we investigated whether responses of prey towards one predator could concomitantly increase risk of predation from another predator exhibiting a different foraging tactic. 2. We investigated trade-offs made by solitary caribou females and mothers accompanied by their calf during the period of highest calf vulnerability, and compared the behaviour of mothers that would eventually lose their calf to predation to that of mothers whose calf survived until the following year. We modelled habitat selection using different ... : Forage availability in caribou rangeHabitat characteristics measured in the field to quantify forage availability in the range of the Charlevoix caribou population, Québec, Canada, 2007-2008.Field_surveys.xlsxCaribou dataData set used to measure habitat selection by caribou. The UA variable differentiates use (1) and availability (0). The 3 reproductive statuses are represented by "solitary", "calf_alive", and "calf_dead".Caribou_Data.xlsxWolf dataData set used to measure habitat selection by wolf. The UA variable differentiates use (1) and availability (0).Wolf_Data.xlsxBear dataData set used to measure habitat selection by bear. The UA variable differentiates use (1) and availability (0).Bear_Data.xlsxResults from individual resource selection modelsThe results from the 43 individual RSFs are reported in this table. For each variable, we report the estimate, standard error of the estimate (SE), degrees of freedom (DF), t value, p value (with alpha = 0.05), and lower and upper bounds of the 95% confidence ... |
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