Show simple item record

dc.contributor.authorAndrews, Abigail
dc.contributor.authorHunt, George
dc.date.accessioned2014-10-20T20:06:45Z
dc.date.available2014-10-20T20:06:45Z
dc.date.issued2011-09
dc.identifier.urihttp://hdl.handle.net/1773/26679
dc.description.abstractDue to the generalist nature of its diet, the harbor seal (Phoca vitulina richardsi) has been thought to be an indicator of change in ecosystems. By utilizing expected patterns in salmon presence, this study sought to assess the capacity of harbor seal foraging to act as an accurate proxy for salmon presence and activity in Cattle Pass, Washington. Salmon were expected to be present in the channel beginning mid-summer, at which point it should be easier for individual fish to migrate northward through Cattle Pass during northward-flowing flooding tides. During the summers of 2010 and 2011, harbor seal presence and foraging was observed with respect to tidal phase and current velocity. Of all salmon captures observed during 2010, 79.2% occurred during flooding tides and 65.81% occurred during the month of August. During 2010, harbor seal foraging reflected expected seasonal and tidal patterns of salmon presence in the pass. Results support the proposal that with additional data collection, harbor seal foraging has the potential to act as successful indicators of salmon presence and activity in Cattle Pass.en_US
dc.language.isoen_USen_US
dc.publisherFriday Harbor Labsen_US
dc.relation.ispartofseriesBlinks NSF REU BEACON Internship Program;SummerB, 2011
dc.subjectharbor seal (Phoca vitulina); foraging behavior; predator-prey interactions; salmon (Oncorhynchus); San Juan Islands; tidal currentsen_US
dc.titleTidal influence on harbor seal foraging activity in the San Juan Islands, WA: Indirect insight on salmon in Cattle Passen_US
dc.typeOtheren_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record