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Skip to Search Results- 20Biological Sciences, Department of
- 15Biological Sciences, Department of/Journal Articles (Biological Sciences)
- 5Biological Sciences, Department of/Research Data and Materials (Biological Sciences)
- 4Mathematical and Statistical Sciences, Department of
- 4Mathematical and Statistical Sciences, Department of/Research Publications (Mathematical and Statistical Sciences)
- 8Derocher, A.E.
- 7Derocher, Andrew E.
- 5Auger-Méthé, Marie
- 3Andrew E. Derocher
- 3DeMars, Craig A.
- 3Lewis, Mark A.
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A body composition model to estimate mammalian energy stores and metabolic rates from body mass and body length, with application to polar bears
Download2009-01-01
Derocher, Andrew E., Klanjscek, Tin, Molnár, Péter K., Lewis, Mark A., Obbard, Martyn E.
Many species experience large fluctuations in food availability and depend on energy from fat and protein stores for survival, reproduction and growth. Body condition and, more specifically, energy stores thus constitute key variables in the life history of many species. Several indices exist to...
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1999
We observed a case of adoption of a single four-month-old polar bear cub (Ursus maritimus) into an existing litter of two cubs on Hopen Island, Svalbard. We believe the high density of maternity dens in the study area may increase the likelihood of natural adoption. Speculation about theoretical...
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2007
A case of polar bear infanticide and cannibalism is reported from Phippsøya, Svalbard. In this instance, a cub of some 7 months was killed by an adult male bear, which was in poor condition, in the close proximity of the mother,which was also in poor condition. It seems probable that the attack...
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Caribou Data Set
2016-06-10
DeMars, Craig A., Derocher, Andrew E., Auger-Méthé, Marie
This the data associated with the manuscript: Auger-Méthé, M, AE Derocher, DA DeMars, MJ Plank, EA Codling, MA Lewis. Evaluating random search strategies in three mammals from distinct feeding guilds. Journal of Animal Ecology. In Press. The data is the step lengths and turning angles measured...
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Differentiating the Lévy walk from a composite correlated random walk - Code
2015
Lewis, Mark A., Auger-Méthé, Marie, Plank, Michael J., Codling, Edward A., Derocher, Andrew E.
Source code for an R package that can be used to simulate and apply various search strategy models to movement data. This is the code used in the manuscript entitled: Differentiating the Lévy walk from a composite correlated random walk. See https://github.com/MarieAugerMethe/CCRWvsLW for any...
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Differentiating the Lévy walk from a composite correlated random walk - Data
2015
Lewis, Mark A., Auger-Méthé, Marie, Plank, Michael J., Codling, Edward A., Derocher, Andrew E.
This the data associated with the manuscript entitled: Differentiating the Lévy walk from a composite correlated random walk. It is the step lengths and turning angles of two bears collared in the Hudson Bay. The data is the step length and turning angle measured at regular time intervals (every...
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2014
Lewis, M.A., Derocher, A.E., Molnár, P.K.
Allee effects are an important component in the population dynamics of numerous species. Accounting for these Allee effects in population viability analyses generally requires estimates of low-density population growth rates, but such data are unavailable for most species and particularly...
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Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals
Download2003
Grahl-Nielsen, O., Lydersen, C., Wiig, Ø., Kovacs, K., Derocher, A.E., Andersen, M.
Polar bears Ursus maritimus are predators of phocid seals, but they also forage opportunistically on a variety of other species. In the Barents Sea—Svalbard area, their diet is thought to consist almost exclusively of ringed seals Phoca hispida, bearded seals Erignathus barbatus and harp seals P....
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Grizzly Bear Data Set
2016-06-10
DeMars, Craig A., Auger-Méthé, Marie, Derocher, Andrew E.
This the data associated with the manuscript: Auger-Méthé, M, AE Derocher, DA DeMars, MJ Plank, EA Codling, MA Lewis. Evaluating random search strategies in three mammals from distinct feeding guilds. Journal of Animal Ecology. In Press. The data is the step lengths and turning angles measured...
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2016-01-01
Marie Auger-Méthé, Mark A. Lewis, Andrew E. Derocher
Home range size estimates are often used to assess the amount of space required for animals to perform the activities essential for their survival and reproduction. However, in moving environments, traditional home range estimates may be ill suited to this task. In particular, traditional home...