||Growth and Food Consumption of Juvenile Coho Salmon Exposed to Natural and Elevated Fluctuating Temperatures.
Everso, Larry Bruce ;
||Oregon State Univ., Corvallis.
||OWRR-B-027-ORE; 14874,; B-027-ORE(3)
( Salmon ;
( Fisheries ;
Water pollution) ;
Temperature measurement ;
Food consumption ;
Oncorhynchus Kisutch ;
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Relationships between rates of food consumption, growth and food assimilation of juvenile coho salmon were determined for different experimental temperature conditions during the short-term, 30-day experiments. The efficiency of food assimilation was determined by measuring the quantities of food consumed and the amounts of fecal wastes produced. Concurrent long-term studies were conducted over four- and eight-month periods under similar temperature conditions. Growth rates of salmon at equivalent ration levels were compared between the short and long-term experiments. The growth rates of control fish were generally greater than those of fish exposed to elevated temperatures for each of the five short-term experiments. Increased rations ameliorated the effects of elevated temperatures on growth rates. (Modified author abstract)