Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka
The importance of interspecific competition as a mechanism regulating population abundance in off-shore marine communities is largely unknown. We evaluated offshore competition between Asian pink salmon and Bristol Bay (Alaska) sockeye salmon, which intermingle in the North Pacific Ocean and Bering...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.555.127 2023-05-15T15:43:56+02:00 Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka G. T. Ruggerone M. Zimmermann K. W. Myers J. L. Nielsen D. E. Rogers The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.555.127 http://home.comcast.net/~ruggerone/Bristol_Bay_Sockeye_Pink.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.555.127 http://home.comcast.net/~ruggerone/Bristol_Bay_Sockeye_Pink.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://home.comcast.net/~ruggerone/Bristol_Bay_Sockeye_Pink.pdf management marine survival Oncorhynchus Pacific text 2003 ftciteseerx 2016-04-17T00:01:03Z The importance of interspecific competition as a mechanism regulating population abundance in off-shore marine communities is largely unknown. We evaluated offshore competition between Asian pink salmon and Bristol Bay (Alaska) sockeye salmon, which intermingle in the North Pacific Ocean and Bering Sea, using the unique biennial abundance cycle of Asian pink salmon from 1955 to 2000. Sockeye salmon growth during the second and third growing seasons at sea, as determined by scale measurements, declined significantly in odd-numbered years, corres-ponding to years when Asian pink salmon are most abundant. Bristol Bay sockeye salmon do not interact with Asian pink salmon during their first summer and fall seasons and no difference in first year scale growth was detected. The interaction with odd-year pink salmon led to significantly smaller size at age of adult sockeye salmon, especially among younger female salmon. Examination of sockeye salmon smolt to adult survival rates during 1977–97 indicated that smolts entering the ocean during even-numbered years and interacting with abundant odd-year pink salmon dur-ing the following year experienced 26 % (age-2 smolt) to 45 % (age-1 smolt) lower survival compared with smolts migrating during odd-numbered years. Adult sockeye salmon returning to Bristol Bay from even-year smolt migrations were 22 % less abundant (re-duced by 5.9 million fish per year) compared with returns from odd-year migrations. The greatest reduc-tion in adult returns occurred among adults spending 2 compared with 3 years at sea. Our new evidence for interspecific competition highlights the need for multispecies, international management of salmon production, including salmon released from hatcheries into the ocean. Text Bering Sea Oncorhynchus gorbuscha Pink salmon Alaska Unknown Bering Sea Pacific Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) |
institution |
Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
topic |
management marine survival Oncorhynchus Pacific |
spellingShingle |
management marine survival Oncorhynchus Pacific G. T. Ruggerone M. Zimmermann K. W. Myers J. L. Nielsen D. E. Rogers Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka |
topic_facet |
management marine survival Oncorhynchus Pacific |
description |
The importance of interspecific competition as a mechanism regulating population abundance in off-shore marine communities is largely unknown. We evaluated offshore competition between Asian pink salmon and Bristol Bay (Alaska) sockeye salmon, which intermingle in the North Pacific Ocean and Bering Sea, using the unique biennial abundance cycle of Asian pink salmon from 1955 to 2000. Sockeye salmon growth during the second and third growing seasons at sea, as determined by scale measurements, declined significantly in odd-numbered years, corres-ponding to years when Asian pink salmon are most abundant. Bristol Bay sockeye salmon do not interact with Asian pink salmon during their first summer and fall seasons and no difference in first year scale growth was detected. The interaction with odd-year pink salmon led to significantly smaller size at age of adult sockeye salmon, especially among younger female salmon. Examination of sockeye salmon smolt to adult survival rates during 1977–97 indicated that smolts entering the ocean during even-numbered years and interacting with abundant odd-year pink salmon dur-ing the following year experienced 26 % (age-2 smolt) to 45 % (age-1 smolt) lower survival compared with smolts migrating during odd-numbered years. Adult sockeye salmon returning to Bristol Bay from even-year smolt migrations were 22 % less abundant (re-duced by 5.9 million fish per year) compared with returns from odd-year migrations. The greatest reduc-tion in adult returns occurred among adults spending 2 compared with 3 years at sea. Our new evidence for interspecific competition highlights the need for multispecies, international management of salmon production, including salmon released from hatcheries into the ocean. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
G. T. Ruggerone M. Zimmermann K. W. Myers J. L. Nielsen D. E. Rogers |
author_facet |
G. T. Ruggerone M. Zimmermann K. W. Myers J. L. Nielsen D. E. Rogers |
author_sort |
G. T. Ruggerone |
title |
Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka |
title_short |
Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka |
title_full |
Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka |
title_fullStr |
Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka |
title_full_unstemmed |
Competition between Asian pink salmon (Oncorhynchus gorbuscha) and Alaskan sockeye salmon (O. nerka |
title_sort |
competition between asian pink salmon (oncorhynchus gorbuscha) and alaskan sockeye salmon (o. nerka |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.555.127 http://home.comcast.net/~ruggerone/Bristol_Bay_Sockeye_Pink.pdf |
long_lat |
ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
Bering Sea Pacific Sockeye |
geographic_facet |
Bering Sea Pacific Sockeye |
genre |
Bering Sea Oncorhynchus gorbuscha Pink salmon Alaska |
genre_facet |
Bering Sea Oncorhynchus gorbuscha Pink salmon Alaska |
op_source |
http://home.comcast.net/~ruggerone/Bristol_Bay_Sockeye_Pink.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.555.127 http://home.comcast.net/~ruggerone/Bristol_Bay_Sockeye_Pink.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766378155648483328 |