Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids
Colony size, nesting ecology and diet of Caspian Terns (Hydroprogne caspia) were investigated in the San Francisco Bay area (SFBA) during 2003-2009 to assess the potential for conservation of the tern breeding population and possible negative effects of predation on survival of juvenile salmonids (O...
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ftoregonstate:ir.library.oregonstate.edu:1n79h470d 2024-04-14T08:14:26+00:00 Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids Collis, Ken Roby, Daniel D. Larson, Keith W. Adrean, Lindsay J. Nelson, S. Kim Evans, Allen F. Hostetter, Nathan Battaglia, Dan Lyons, Donald E. Marcella, Tim Patterson, Allison Fisheries and Wildlife https://ir.library.oregonstate.edu/concern/articles/1n79h470d English [eng] eng unknown The Waterbird Society https://ir.library.oregonstate.edu/concern/articles/1n79h470d In Copyright Article ftoregonstate 2024-03-21T15:40:57Z Colony size, nesting ecology and diet of Caspian Terns (Hydroprogne caspia) were investigated in the San Francisco Bay area (SFBA) during 2003-2009 to assess the potential for conservation of the tern breeding population and possible negative effects of predation on survival of juvenile salmonids (Oncorhynchus spp.). Numbers of breeding Caspian Terns declined 36% from 2003 to 2009, mostly due to abandonment of the Knight Island colony and decline of the Brooks Island colony, the two largest colonies in the SFBA. Concurrently, nesting success declined 69% associated with colony site characteristics such as (a) quality and quantity of nesting substrate, (b) vulnerability to nest predators, (c) displacement by other colonial waterbirds and (d) human disturbance. Marine fishes were the predominant prey in tern diets from the SFBA; however, diet composition varied among colonies. Juvenile salmonids comprised 22.9% of the diet of terns nesting in the North Bay, 5.3% of diet of terns nesting in the Central Bay, and 0.1% in the South Bay. Construction or restoration of nesting islands in the South Bay may help maintain and restore breeding Caspian Terns without enhancing mortality of salmonid stocks of conservation concern. This is the publisher’s final pdf. The published article is copyrighted by The Waterbird Society and can be found at: http://www.waterbirds.org/journal Keywords: diet composition, productivity, colony size, Hydroprogne caspia, Caspian Tern, colony restoration, Oncorhynchus, salmonids, limiting factors, San Francisco Bay Article in Journal/Newspaper Knight Island ScholarsArchive@OSU (Oregon State University) South Bay ENVELOPE(-63.579,-63.579,-64.870,-64.870) North Bay ENVELOPE(-37.690,-37.690,-54.040,-54.040) Knight Island ENVELOPE(-64.010,-64.010,-64.916,-64.916) Brooks Island ENVELOPE(-100.217,-100.217,56.968,56.968) |
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ScholarsArchive@OSU (Oregon State University) |
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ftoregonstate |
language |
English unknown |
description |
Colony size, nesting ecology and diet of Caspian Terns (Hydroprogne caspia) were investigated in the San Francisco Bay area (SFBA) during 2003-2009 to assess the potential for conservation of the tern breeding population and possible negative effects of predation on survival of juvenile salmonids (Oncorhynchus spp.). Numbers of breeding Caspian Terns declined 36% from 2003 to 2009, mostly due to abandonment of the Knight Island colony and decline of the Brooks Island colony, the two largest colonies in the SFBA. Concurrently, nesting success declined 69% associated with colony site characteristics such as (a) quality and quantity of nesting substrate, (b) vulnerability to nest predators, (c) displacement by other colonial waterbirds and (d) human disturbance. Marine fishes were the predominant prey in tern diets from the SFBA; however, diet composition varied among colonies. Juvenile salmonids comprised 22.9% of the diet of terns nesting in the North Bay, 5.3% of diet of terns nesting in the Central Bay, and 0.1% in the South Bay. Construction or restoration of nesting islands in the South Bay may help maintain and restore breeding Caspian Terns without enhancing mortality of salmonid stocks of conservation concern. This is the publisher’s final pdf. The published article is copyrighted by The Waterbird Society and can be found at: http://www.waterbirds.org/journal Keywords: diet composition, productivity, colony size, Hydroprogne caspia, Caspian Tern, colony restoration, Oncorhynchus, salmonids, limiting factors, San Francisco Bay |
author2 |
Fisheries and Wildlife |
format |
Article in Journal/Newspaper |
author |
Collis, Ken Roby, Daniel D. Larson, Keith W. Adrean, Lindsay J. Nelson, S. Kim Evans, Allen F. Hostetter, Nathan Battaglia, Dan Lyons, Donald E. Marcella, Tim Patterson, Allison |
spellingShingle |
Collis, Ken Roby, Daniel D. Larson, Keith W. Adrean, Lindsay J. Nelson, S. Kim Evans, Allen F. Hostetter, Nathan Battaglia, Dan Lyons, Donald E. Marcella, Tim Patterson, Allison Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids |
author_facet |
Collis, Ken Roby, Daniel D. Larson, Keith W. Adrean, Lindsay J. Nelson, S. Kim Evans, Allen F. Hostetter, Nathan Battaglia, Dan Lyons, Donald E. Marcella, Tim Patterson, Allison |
author_sort |
Collis, Ken |
title |
Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids |
title_short |
Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids |
title_full |
Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids |
title_fullStr |
Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids |
title_full_unstemmed |
Trends in Caspian Tern Nesting and Diet in San Francisco Bay: Conservation Implications for Terns and Salmonids |
title_sort |
trends in caspian tern nesting and diet in san francisco bay: conservation implications for terns and salmonids |
publisher |
The Waterbird Society |
url |
https://ir.library.oregonstate.edu/concern/articles/1n79h470d |
long_lat |
ENVELOPE(-63.579,-63.579,-64.870,-64.870) ENVELOPE(-37.690,-37.690,-54.040,-54.040) ENVELOPE(-64.010,-64.010,-64.916,-64.916) ENVELOPE(-100.217,-100.217,56.968,56.968) |
geographic |
South Bay North Bay Knight Island Brooks Island |
geographic_facet |
South Bay North Bay Knight Island Brooks Island |
genre |
Knight Island |
genre_facet |
Knight Island |
op_relation |
https://ir.library.oregonstate.edu/concern/articles/1n79h470d |
op_rights |
In Copyright |
_version_ |
1796312631517118464 |