Results 21 to 30 of about 18,465 (208)

Velocity-based movement modeling for individual and population level inference. [PDF]

PLoS ONE, 2011
Understanding animal movement and resource selection provides important information about the ecology of the animal, but an animal's movement and behavior are not typically constant in time.
Ephraim M Hanks, Mevin B Hooten, Devin S Johnson, Jeremy T Sterling   +3 more
doaj   +1 more source

The Harvest Effect on Dynamics of Northern Fur Seal Population: Mathematical Modeling and Data Analysis Results

Mathematics, 2022
We examine population trends in light of male harvest data considering the long-time series of population data on northern fur seals at Tyuleniy Island.
Oksana Zhdanova, Alexey Kuzin, Efim Frisman   +2 more
doaj   +1 more source

Influence of Solvent Lipid Extraction on Tissue-Specific Carbon Isotopes. [PDF]

Ecol Evol
To assess the impact of solvents on δ13C, we used a standard lipid extraction protocol on four different pure proteins and humpback whale blubber, a very lipid‐rich tissue. The results showed that the solvents did not have a significant effect on δ13C and δ15N of pure proteins as values largely remained within 0.5‰ of unextracted samples, which is ...
Groß J, Fry B, Eggebo J, Bengtson Nash S.   +3 more
europepmc   +2 more sources

Mortality of puppies of northern fur seal (Callorhinus ursinus) on Tyuleniy Island (Okhotsk Sea)

Известия ТИНРО, 2023
Mortality rate of fur seal puppies is considered for the first two months of their postnatal ontogenesis, from the birth to leaving the rookery on Tyuleniy Island for wintering in the open waters of the Pacific.
A. E. Kuzin
doaj   +1 more source

Drones reveal spatial patterning of sympatric Alaskan pinniped species and drivers of their local distributions

Drone Systems and Applications, 2022
The Arctic and its adjacent ecosystems are undergoing rapid ecological reorganization in response to the effects of global climate change, and sentinel species provide critical updates as these changes unfold. This study leverages emerging remote sensing
Gregory D. Larsen, Alexander C. Seymour, Erin L. Richmond, Lauren M. Divine, Erin E. Moreland, Everette Newton, Josh M. London, David W. Johnston   +7 more
doaj   +1 more source

A Synthesis of Laaquda$\hat{\mathbf{x}}$ (Northern Fur Seal) Community Surveys and Commercial Fishery Data in the Pribilof Islands Marine Ecosystem, Alaska

Journal of Marine Science and Engineering, 2022
Indigenous communities on the Pribilof Islands have longstanding cultural and economic ties to their marine ecosystem and, in particular, to laaqudan (in Unangam Tunuu) or northern fur seals (NFS; Callorhinus ursinus).
Lauren Divine, Megan J. Peterson Williams, Jeremy Davies, Michael LeVine, Bruce Robson   +4 more
doaj   +1 more source

Rare Record of Albinism in a New Zealand Fur Seal (<i>Arctocephalus forsteri</i>) Pup With Observations Through the Weaning Period. [PDF]

Ecol Evol
This article provides the first known scientific record of albinism in a New Zealand fur seal pup. We describe the individual with a particular focus on its sensory abilities. This individual's birth at a central mainland colony may permit continued study throughout his life, unlike many records of similar conditions in other species.
Hall AA, Grant RA, Suzanne Weir J.
europepmc   +2 more sources

To morphological description of cardiovascular system in pinnipeds (Pinnipedia)

Известия ТИНРО, 2015
Morphometric parameters of the heart, the absolute and relative caliber of the aortic arch and the major arterial trunks are determined for northern fur seal Callorhinus ursinus , Steller sea lion Eumetopias jubatus , spotted seal Phoca largha , harbor ...
Alexey E. Kuzin
doaj   +1 more source

First-Year Survival of Northern Fur Seals (Callorhinus ursinus) Can Be Explained by Pollock (Gadus chalcogrammus) Catches in the Eastern Bering Sea

Journal of Marine Science and Engineering, 2021
The Pribilof northern fur seal (Callorhinus ursinus) herd in the eastern Bering Sea has declined by ~70% since the 1970s, for elusive reasons. Competition for pollock (Gadus chalcogramma) with the commercial fishery has been suspected as a contributing ...
Jeffrey W. Short, Harold J. Geiger, Lowell W. Fritz, Jonathan J. Warrenchuk   +3 more
doaj   +1 more source

Hematology of Free-Ranging, Lactating Northern Fur Seals, Callorhinus ursinus [PDF]

Journal of Wildlife Diseases, 2011
Thirteen standard hematology values were determined for a healthy and growing population of free-ranging, lactating northern fur seals (Callorhinus ursinus) from Lovushki Island in the Kuril Islands of far-east Russia. Results are presented from 24 females sampled between June and August during the 3-yr period of 2006-08.
Sarah E, Norberg, Vladimir N, Burkanov, Pam, Tuomi, Russel D, Andrews   +3 more
openaire   +2 more sources