|SREL Reprint #0628|
Thermoregulation of Largemouth Bass (Micropterus salmoides) in a
Reservoir Receiving Thermal Effluent
Behavioral thermoregulations of largemouth bass (Micropterus
salmoides) was determined by measuring internal temperatures on 781 fish
from an area heated by a thermal effluent and 847 fish from a nonheated area.
Largemouth bass from the heated area manifested
significantly higher mean body temperatures for 10 of 13 months than those from
the nonheated area. Internal
temperatures were approximately 10°C higher in bass from the
heated area during December through March and averaged about 1 to 3°C
higher through the spring and early summer period. During August and September 1970, body temperatures of bass
were similar between areas.
Higher body temperatures from bass from the heated and nonheated areas
were 36.2 and 31.4°C, respectively.
Body weight and condition factor were negatively correlated with body
temperatures of bass from the heated area, and from the nonheated area (weight),
Preferred water temperatures for bass in the heated
waters were 20-22°C
in the winter and 28°C
in the summer. Bass from the
nonheated area predominately inhabited 29°C
water in the summer.
Keywords: Par Pond Reservoir System
SREL Reprint #0628
Bennett, D.H. 1979. Behavioral thermoregulation of largemouth bass (Micropterus salmoides) in a reservoir receiving thermal
effluent. Archiv fuer Hydrobiologie 86:193-203.