Juvenile coho salmon (101-400 mm) were sampled by
purse seine off the Pacific Coast from Waatch Point,
Washington to Four Mile Creek, Oregon, out to 30 mi
offshore, during the months of May, June, and September in
1982 and 1983. Sea surface temperature, surface salinity,
surface chlorophyll-a concentration, and Secchi depth were
measured at each station. Sea surface temperatures were
higher in 1983 than in 1982, while surface chlorophyll-a
concentrations and surface salinities were lower. Catch
data were not highly correlated with any of the four
physical parameters measured.
Strong northerly winds and strong upwelling tended to
disperse juvenile coho offshore and south. Fish were found
closer inshore during periods of weak winds and weak
upwelling. In both years the center of distribution of the
fish appeared to shift northward as the summer progressed.
Larger fish, in general, were found farther north and
offshore throughout the year. / Graduation date: 1985
| Identifer | oai:union.ndltd.org:ORGSU/oai:ir.library.oregonstate.edu:1957/29522 |
| Date | 01 March 1985 |
| Creators | Chung, Alton W. |
| Contributors | Pearcy, William G. |
| Source Sets | Oregon State University |
| Language | en_US |
| Detected Language | English |
| Type | Thesis/Dissertation |
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