Effects of Low Temperature on the Survival and Behavior of Threadfin Shad, Dorosoma petenense
- 1 January 1978
- journal article
- Published by Oxford University Press (OUP) in Transactions of the American Fisheries Society
- Vol. 107 (1) , 63-70
- https://doi.org/10.1577/1548-8659(1978)107<63:eoltot>2.0.co;2
Abstract
Laboratory studies assessed the effects of gradual and rapid decreases in temperature on 9‐14‐cm long threadfin shad collected from a tributary of the Tennessee River. Fish acclimated to 15 C and exposed to temperatures cooling 1 C each 72 hours decreased in feeding activity and schooled less compactly beginning at 9 C. At lower temperatures they lost orientation and were insensitive to external stimuli, and none survived exposure to 4 C. Threadfin shad exposed to sudden cooling (2 to 5 C decreases in 4 hours) lost equilibrium in proportion to the magnitude of temperature decrease if minima of 4 to 6 C were reached. Cold‐shocked fish that had lost equilibrium for 0.2, 30, and 90 minutes before being returned to warmer water experienced mortalities of 32, 79, and 94%, respectively.This publication has 0 references indexed in Scilit: