SREL Reprint #0386




Effects of Thermal Effluent on the Fat Content of the Mosquito Fish

Janet D. Flake and Michael H. Smith



Mosquito fish were collected at the Savannah River Plant from seven locations, three areas receiving thermal effluent, one thermal recovery area, and three natural areas.  Percentage of fat in each fish was determined and was correlated with the log of the dry weight, but not with standard length.  Females had significantly more fat than males at all locations except one.  Significant differences in fat content were attributable to location, but no correlation was found between percentage of fat and habitat temperature.  Several hypotheses may help to explain the data, but it seems likely that Gambusia affinis is naturally a eurythermal species.  Southern populations of this species should be useful in stocking programs that are part of reactor construction plans.


SREL Reprint #0386

Falke, J.D. and M.H. Smith. 1974. Effects of thermal effluent on the fat content of the mosquito fish. p. 100-108. In Thermal Ecology, edited by J.W. Gibbons and R.R. Sharitz. CONF 730505. Atomic Energy Commission.

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