Walrus used and available resource units for northeast Chukchi Sea, 2008-2012
Sea ice loss represents a stressor to the Pacific walrus (Odobenus rosmarus divergens), which feeds on benthic macroinvertebrates in the Bering and Chukchi seas. However, no studies have examined the effects of sea ice on foraging walrus space use patterns. Thus, we examined walrus foraging resource...
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USGS Science Data Catalog
2016
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dataone:aeb9e6f0-6caf-4a64-92f6-068c15a79388 2024-10-03T18:46:03+00:00 Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 W. S. Beatty C. V. Jay A. S. Fischbach J. M. Grebmeier R. L. Taylor A. L. Blanchard S. C. Jewett Northeast Chukchi Sea ENVELOPE(-174.4,-156.88,72.84,66.61) BEGINDATE: 2008-06-04T00:00:00Z ENDDATE: 2012-10-12T00:00:00Z 2016-11-01T00:00:00Z https://search.dataone.org/view/aeb9e6f0-6caf-4a64-92f6-068c15a79388 unknown USGS Science Data Catalog Biota Resource selection Use-availability Discrete choice Chukchi Sea Odobenus Odobenus rosmarus Dataset 2016 dataone:urn:node:USGS_SDC 2024-10-03T18:09:17Z Sea ice loss represents a stressor to the Pacific walrus (Odobenus rosmarus divergens), which feeds on benthic macroinvertebrates in the Bering and Chukchi seas. However, no studies have examined the effects of sea ice on foraging walrus space use patterns. Thus, we examined walrus foraging resource selection as a function of proximity to resting substrates and prey biomass with a matched use-availability design. We quantified biomass of 17 benthic taxa, which included amphipods, bivalves, polychaete, sand dollars, tunicates, and sipunculids. We included covariates for distance to sea ice and distance to land, and systematically developed a series of candidate models to examine interactions among benthic prey biomass and resting substrates. We ranked candidate models with Bayesian Information Criterion and made inferences on walrus resource selection based on the top-ranked model. Biomass of the bivalve family Tellinidae, distance to ice, distance to land, and the interaction of distances to ice and land were in the top-ranked model. Standardized model coefficients indicated that distance to ice explained the most variation in walrus foraging resource selection patterns followed by Tellinidae biomass. Distance to land and the interaction of distances to ice and land accounted for similar levels of variation in foraging walrus resource selection. These data represent the used and available resource units with the covariates of distance to land and distance to ice. Dataset Chukchi Chukchi Sea Odobenus rosmarus Sea ice walrus* USGS Science Data Catalog (via DataONE) Chukchi Sea Pacific ENVELOPE(-174.4,-156.88,72.84,66.61) |
institution |
Open Polar |
collection |
USGS Science Data Catalog (via DataONE) |
op_collection_id |
dataone:urn:node:USGS_SDC |
language |
unknown |
topic |
Biota Resource selection Use-availability Discrete choice Chukchi Sea Odobenus Odobenus rosmarus |
spellingShingle |
Biota Resource selection Use-availability Discrete choice Chukchi Sea Odobenus Odobenus rosmarus W. S. Beatty C. V. Jay A. S. Fischbach J. M. Grebmeier R. L. Taylor A. L. Blanchard S. C. Jewett Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 |
topic_facet |
Biota Resource selection Use-availability Discrete choice Chukchi Sea Odobenus Odobenus rosmarus |
description |
Sea ice loss represents a stressor to the Pacific walrus (Odobenus rosmarus divergens), which feeds on benthic macroinvertebrates in the Bering and Chukchi seas. However, no studies have examined the effects of sea ice on foraging walrus space use patterns. Thus, we examined walrus foraging resource selection as a function of proximity to resting substrates and prey biomass with a matched use-availability design. We quantified biomass of 17 benthic taxa, which included amphipods, bivalves, polychaete, sand dollars, tunicates, and sipunculids. We included covariates for distance to sea ice and distance to land, and systematically developed a series of candidate models to examine interactions among benthic prey biomass and resting substrates. We ranked candidate models with Bayesian Information Criterion and made inferences on walrus resource selection based on the top-ranked model. Biomass of the bivalve family Tellinidae, distance to ice, distance to land, and the interaction of distances to ice and land were in the top-ranked model. Standardized model coefficients indicated that distance to ice explained the most variation in walrus foraging resource selection patterns followed by Tellinidae biomass. Distance to land and the interaction of distances to ice and land accounted for similar levels of variation in foraging walrus resource selection. These data represent the used and available resource units with the covariates of distance to land and distance to ice. |
format |
Dataset |
author |
W. S. Beatty C. V. Jay A. S. Fischbach J. M. Grebmeier R. L. Taylor A. L. Blanchard S. C. Jewett |
author_facet |
W. S. Beatty C. V. Jay A. S. Fischbach J. M. Grebmeier R. L. Taylor A. L. Blanchard S. C. Jewett |
author_sort |
W. S. Beatty |
title |
Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 |
title_short |
Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 |
title_full |
Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 |
title_fullStr |
Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 |
title_full_unstemmed |
Walrus used and available resource units for northeast Chukchi Sea, 2008-2012 |
title_sort |
walrus used and available resource units for northeast chukchi sea, 2008-2012 |
publisher |
USGS Science Data Catalog |
publishDate |
2016 |
url |
https://search.dataone.org/view/aeb9e6f0-6caf-4a64-92f6-068c15a79388 |
op_coverage |
Northeast Chukchi Sea ENVELOPE(-174.4,-156.88,72.84,66.61) BEGINDATE: 2008-06-04T00:00:00Z ENDDATE: 2012-10-12T00:00:00Z |
long_lat |
ENVELOPE(-174.4,-156.88,72.84,66.61) |
geographic |
Chukchi Sea Pacific |
geographic_facet |
Chukchi Sea Pacific |
genre |
Chukchi Chukchi Sea Odobenus rosmarus Sea ice walrus* |
genre_facet |
Chukchi Chukchi Sea Odobenus rosmarus Sea ice walrus* |
_version_ |
1811923663296921600 |