Increased Growth Rate of Rock Bass, Ambloplites Rupestris (Rafinesque), following Reduction in the Density of the Population
- 1 January 1941
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 70 (1) , 143-148
- https://doi.org/10.1577/1548-8659(1940)70[143:igrorb]2.0.co;2
Abstract
Lakes with dense population of stunted fish have long presented a difficult problem to fishery biologists. In 1937 the Michigan Institute for Fisheries Research began a series of planned experiments in the reduction of the poputions of over‐crowded lakes. In one of these experiments the fish of the south basin of Standard Lake were poisoned with rotenone (derris root). Samples of the rock bass population were taken at the time of the poisoning, in September, 1937. During 1939 and 1940 further collections were made in order to determine the effect of the population reduction. An increased growth rate, too great to be accounted for by any normal growth fluctuation, had occurred in fish of all ages. The reduction of the density of the populations is therefore suggested as one solution to the problem of lakes with large populations of stunted fish.This publication has 0 references indexed in Scilit: