Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Migration Response of Juvenile Chinook Salmon to Substrates and Temperatures.
Author Morril, C. F. ; Bjorn, T. C. ;
CORP Author Idaho Univ., Moscow. Water Resources Research Inst.
Year Published 1972
Report Number OWRR-A-038-IDA; 13293,; A-038-IDA(1)
Stock Number PB-211 608
Additional Subjects ( Salmon ; Animal migrations) ; Seasonal variations ; Water ; Temperature ; Substrates ; Rubble ; Rocks ; Animal behavior ; Fishes ; Chinook salmon
Library Call Number Additional Info Location Last
NTIS  PB-211 608 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/23/1988
Collation 34p
Downstream migration of age 0+ chinook salmon from stream channels with rock and rubble (good) or gravel or shale (poor) substrates and constant or declining water temperatures was assessed during the fall months of 1970 and 1971. As water temperatures declined, juvenile chinook left stream channels with gravel or shale substrates or moved into available hiding spaces in stream channels with rock and rubble substrate. Fish initially emigrated as temperatures declined below 10 C. The number of emigrants reflects the holding capacity of the substrate and the density of the fish population. The migration response varied with size and race of fish. Most of the response difference between races is attributed to differences in fish size. Juvenile spring chinook find rock and rubble substrate and important component of their winter habitat.