Riverine Spawning by Sockeye Salmon in the Taku River, Alaska and British Columbia
作者:
JohnH. Eiler,
BonitaD. Nelson,
RobertF. Bradshaw,
期刊:
Transactions of the American Fisheries Society
(Taylor Available online 1992)
卷期:
Volume 121,
issue 6
页码: 701-708
ISSN:0002-8487
年代: 1992
DOI:10.1577/1548-8659(1992)121<0701:RSBSSI>2.3.CO;2
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Radio telemetry was used to determine the distribution of sockeye salmonOncorhynchus nerkareturning to spawn in the glacial Taku River in 1984 and 1986, and to locate and characterize spawning areas used by this species. During the study, 253 sockeye salmon were tracked as they moved upriver; 204 of these were followed to spawning areas. Only 37% of the 204 fish traveled to areas associated with lakes; the remaining 63% returned to “riverine” areas – river areas without lakes (42% to the Taku River main stem, 17% to the Nakina River, and 4% to other rivers). Sockeye salmon spawning in riverine areas used a variety of habitat types, including main-river channels, side channels, tributary streams, and upland sloughs. Most (55%) of the radio-tagged fish that returned to the Taku River main stem were tracked to side-channel spawning areas. Half of the 471 adult sockeye salmon sampled in main-stem spawning areas had migrated to sea as juveniles before their first winter. This study showed that many sockeye salmon returning to the Taku River do not depend on lakes, and that riverine sockeye salmon make up a major portion of the run in some river systems.
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