Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides
The San Juan Archipelago is a dynamic cluster of islands supporting seven species of cetaceans including the harbor and dall’s porpoises. Under recognized in the San Juan Archipelago conservation and better management of these species are required. Harbor porpoises were seen in higher densities than...
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Friday Harbor Labratories
2012
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ftunivwashington:oai:digital.lib.washington.edu:1773/27010 2023-05-15T17:59:11+02:00 Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides Teller, Grace E. 2012-12 http://hdl.handle.net/1773/27010 en_US eng Friday Harbor Labratories Pelagic Ecoystem Function Research Apprenticeship;Autumn, 2012 http://hdl.handle.net/1773/27010 Harbor porpoise Phocoena phocoena Dall’s porpoise Phocoenoides Dalli Tides Current Speed Bathymetry San Juan Channel San Juan Archipelago Abundance Distribution Other 2012 ftunivwashington 2023-03-12T18:51:56Z The San Juan Archipelago is a dynamic cluster of islands supporting seven species of cetaceans including the harbor and dall’s porpoises. Under recognized in the San Juan Archipelago conservation and better management of these species are required. Harbor porpoises were seen in higher densities than dall’s porpoises concurrent with past data. Supported by the habitat preference of each species. Densities of harbor porpoises were highest in the central part of the San Juan Channel and densities of dall’s porpoises were not a regular pattern observed. The bathymetry in this section (3 and 4) described by a sudden change from deep (~ 165 m) to shallow (~70 m) water depth effects turbulent mixing and prey aggregation dependent on current speed and direction. Harbor porpoise densities changed considerably due to this effect. Harbor porpoises densities changed when considering tidal factors. Highest densities of harbor porpoises were counted during fast flood (3.02/km2) and fast ebb (1.75/km2). Increased density with increased current speed was observed over 67% of cruise days. Other/Unknown Material Phocoena phocoena University of Washington, Seattle: ResearchWorks San Juan |
institution |
Open Polar |
collection |
University of Washington, Seattle: ResearchWorks |
op_collection_id |
ftunivwashington |
language |
English |
topic |
Harbor porpoise Phocoena phocoena Dall’s porpoise Phocoenoides Dalli Tides Current Speed Bathymetry San Juan Channel San Juan Archipelago Abundance Distribution |
spellingShingle |
Harbor porpoise Phocoena phocoena Dall’s porpoise Phocoenoides Dalli Tides Current Speed Bathymetry San Juan Channel San Juan Archipelago Abundance Distribution Teller, Grace E. Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides |
topic_facet |
Harbor porpoise Phocoena phocoena Dall’s porpoise Phocoenoides Dalli Tides Current Speed Bathymetry San Juan Channel San Juan Archipelago Abundance Distribution |
description |
The San Juan Archipelago is a dynamic cluster of islands supporting seven species of cetaceans including the harbor and dall’s porpoises. Under recognized in the San Juan Archipelago conservation and better management of these species are required. Harbor porpoises were seen in higher densities than dall’s porpoises concurrent with past data. Supported by the habitat preference of each species. Densities of harbor porpoises were highest in the central part of the San Juan Channel and densities of dall’s porpoises were not a regular pattern observed. The bathymetry in this section (3 and 4) described by a sudden change from deep (~ 165 m) to shallow (~70 m) water depth effects turbulent mixing and prey aggregation dependent on current speed and direction. Harbor porpoise densities changed considerably due to this effect. Harbor porpoises densities changed when considering tidal factors. Highest densities of harbor porpoises were counted during fast flood (3.02/km2) and fast ebb (1.75/km2). Increased density with increased current speed was observed over 67% of cruise days. |
format |
Other/Unknown Material |
author |
Teller, Grace E. |
author_facet |
Teller, Grace E. |
author_sort |
Teller, Grace E. |
title |
Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides |
title_short |
Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides |
title_full |
Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides |
title_fullStr |
Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides |
title_full_unstemmed |
Distribution and Abundance of Porpoises In the San Juan Channel: Effects of Bathymetry and Tides |
title_sort |
distribution and abundance of porpoises in the san juan channel: effects of bathymetry and tides |
publisher |
Friday Harbor Labratories |
publishDate |
2012 |
url |
http://hdl.handle.net/1773/27010 |
geographic |
San Juan |
geographic_facet |
San Juan |
genre |
Phocoena phocoena |
genre_facet |
Phocoena phocoena |
op_relation |
Pelagic Ecoystem Function Research Apprenticeship;Autumn, 2012 http://hdl.handle.net/1773/27010 |
_version_ |
1766167957024538624 |