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dc.date 2006-08-23T18:07:10Z
dc.date 2006-08-23T18:07:10Z
dc.date 1950
dc.date.accessioned 2013-10-16T07:38:11Z
dc.date.available 2013-10-16T07:38:11Z
dc.date.issued 2013-10-16
dc.identifier http://ir.library.oregonstate.edu/dspace/bitstream/1957/2949/1/Factors_Trends_Salmon_ocr.pdf
dc.identifier http://hdl.handle.net/1957/2949
dc.identifier.uri http://koha.mediu.edu.my:8181/xmlui/handle/1957/2949
dc.description Three factors were found to be significantly correlated with the fluctuations and trends in silver salmon production in Oregon. Logging was found to adversely affect the runs of salmon in later years. Exceptional winter floods seem to produce poor resulting runs. Low summer water flows also appear to produce lower than average runs on some rivers, while higher summer flows appear to be followed by an increase in the resultant runs. The intensity of fishing was also found to affect the subsequent productivity of the fisheries. Increases in fishing effort on the rivers studied were followed in succeeding cycles by a lower catch, and when the fishing effort declined the ensuing production of silver salmon generally increased. Other factors studied did not bear a significant relationship to the fluctuations or trends of productivity of silver salmon.
dc.language en_US
dc.publisher Portland, Or. : Oregon Fish Commission
dc.relation Contribution (Oregon Fish Commission)
dc.relation no. 12
dc.subject Thematic Classification -- Plants and Animals -- Fish -- Anadromous Fish
dc.subject Thematic Classification -- Habitats and Vegetation -- Aquatic Habitats -- River and Stream Aquatic Habitat
dc.title Some factors influencing the trends of salmon populations in Oregon
dc.type Technical Report


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