Feeding ecology of the Greenland shark under different ice conditions
To date, five sampling trips to Cumberland Sound have been completed, three during times of open water (July-August 2007, 2008, 2009) and two during times of ice cover (April 2008, 2009). Preliminary results indicate that the Greenland shark is feeding at a high trophic position and on benthic and p...
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dataone:sha256:caddb973e772fa98a9f14b2214ec631be639aa10b7c2c6c3dc0c1b3d204e73d3 2024-06-03T18:46:41+00:00 Feeding ecology of the Greenland shark under different ice conditions Aaron Fisk Bailey McMeans Brian Fryer Carlos Idrobo Fikret Berkes Michael Arts Steven Campana Susan Dennard BEGINDATE: 2007-04-01T00:00:00Z ENDDATE: 2012-03-31T00:00:00Z 2012-10-17T00:00:00Z https://search.dataone.org/view/sha256:caddb973e772fa98a9f14b2214ec631be639aa10b7c2c6c3dc0c1b3d204e73d3 unknown Traditional Knowledge Sea ice Climate change Greenland shark Fisheries Habitats Feeding Dataset 2012 dataone:urn:node:BOREALIS 2024-06-03T18:08:43Z To date, five sampling trips to Cumberland Sound have been completed, three during times of open water (July-August 2007, 2008, 2009) and two during times of ice cover (April 2008, 2009). Preliminary results indicate that the Greenland shark is feeding at a high trophic position and on benthic and pelagic resources, based on chemical tracers. The Greenland shark appears to feed on seal during both open water and ice cover, and does not appear to target different resources with season based on chemical tracers. However, some consumers, like ringed seals and predatory zooplankton appear to switch to a lower trophic level during open water, likely to exploit large number of Calanus copepods. Results from several satellite tags suggest that sharks are highly mobile, with regards to depth (i.e. vertical movement) and distance (i.e. horizontal movement). Based on our hierarchical models regarding turbot, we found a strong connection between environmental fluctuations and variations in fishery catch rates between 1987 and 2003. We hope to use the environmental predictors we were able to isolate in order to guide management decisions and improve efficiency of the Inuit fishery. The traditional knowledge survey revealed how Inuit make sense of the environment by using their generative logic product of extensive interaction with the arctic environment. To approach Inuit knowledge from this perspective becomes a platform to develop resource management strategies that encompass Inuit beliefs and values. We are currently completing sample analysis for chemical tracers, and hope to soon better understand both temporal and spatial variability in the feeding behaviour of Greenland sharks and other consumers inhabiting Cumberland Sound. Dataset Arctic Climate change Cumberland Sound Greenland inuit Sea ice Turbot Zooplankton Copepods Unknown Arctic Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Greenland |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
dataone:urn:node:BOREALIS |
language |
unknown |
topic |
Traditional Knowledge Sea ice Climate change Greenland shark Fisheries Habitats Feeding |
spellingShingle |
Traditional Knowledge Sea ice Climate change Greenland shark Fisheries Habitats Feeding Aaron Fisk Bailey McMeans Brian Fryer Carlos Idrobo Fikret Berkes Michael Arts Steven Campana Susan Dennard Feeding ecology of the Greenland shark under different ice conditions |
topic_facet |
Traditional Knowledge Sea ice Climate change Greenland shark Fisheries Habitats Feeding |
description |
To date, five sampling trips to Cumberland Sound have been completed, three during times of open water (July-August 2007, 2008, 2009) and two during times of ice cover (April 2008, 2009). Preliminary results indicate that the Greenland shark is feeding at a high trophic position and on benthic and pelagic resources, based on chemical tracers. The Greenland shark appears to feed on seal during both open water and ice cover, and does not appear to target different resources with season based on chemical tracers. However, some consumers, like ringed seals and predatory zooplankton appear to switch to a lower trophic level during open water, likely to exploit large number of Calanus copepods. Results from several satellite tags suggest that sharks are highly mobile, with regards to depth (i.e. vertical movement) and distance (i.e. horizontal movement). Based on our hierarchical models regarding turbot, we found a strong connection between environmental fluctuations and variations in fishery catch rates between 1987 and 2003. We hope to use the environmental predictors we were able to isolate in order to guide management decisions and improve efficiency of the Inuit fishery. The traditional knowledge survey revealed how Inuit make sense of the environment by using their generative logic product of extensive interaction with the arctic environment. To approach Inuit knowledge from this perspective becomes a platform to develop resource management strategies that encompass Inuit beliefs and values. We are currently completing sample analysis for chemical tracers, and hope to soon better understand both temporal and spatial variability in the feeding behaviour of Greenland sharks and other consumers inhabiting Cumberland Sound. |
format |
Dataset |
author |
Aaron Fisk Bailey McMeans Brian Fryer Carlos Idrobo Fikret Berkes Michael Arts Steven Campana Susan Dennard |
author_facet |
Aaron Fisk Bailey McMeans Brian Fryer Carlos Idrobo Fikret Berkes Michael Arts Steven Campana Susan Dennard |
author_sort |
Aaron Fisk |
title |
Feeding ecology of the Greenland shark under different ice conditions |
title_short |
Feeding ecology of the Greenland shark under different ice conditions |
title_full |
Feeding ecology of the Greenland shark under different ice conditions |
title_fullStr |
Feeding ecology of the Greenland shark under different ice conditions |
title_full_unstemmed |
Feeding ecology of the Greenland shark under different ice conditions |
title_sort |
feeding ecology of the greenland shark under different ice conditions |
publishDate |
2012 |
url |
https://search.dataone.org/view/sha256:caddb973e772fa98a9f14b2214ec631be639aa10b7c2c6c3dc0c1b3d204e73d3 |
op_coverage |
BEGINDATE: 2007-04-01T00:00:00Z ENDDATE: 2012-03-31T00:00:00Z |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) |
geographic |
Arctic Cumberland Sound Greenland |
geographic_facet |
Arctic Cumberland Sound Greenland |
genre |
Arctic Climate change Cumberland Sound Greenland inuit Sea ice Turbot Zooplankton Copepods |
genre_facet |
Arctic Climate change Cumberland Sound Greenland inuit Sea ice Turbot Zooplankton Copepods |
_version_ |
1800869853537501184 |