Influence of thermal challenge on conditioned feeding forays of juvenile rainbow trout

Journal Article · Tue Jan 01 00:00:00 EST 1980 · Trans. Am. Fish. Soc.; (United States)

DOI:https://doi.org/10.1577/1548-8659(1980)109<116:IOTCOC>2.0.CO;2· OSTI ID:5566428

Munson, B H; McCormick, J H; Collins, H L

Juvenile rainbow trout (Salmo gairdneri) conditioned to traverse a 2.4-m-long channel to receive a food reward were subjected to in-transit thermal challenges. Conditioning was to a criterion that required 80% of the fish to leave the home area and reach the reward area within 2 minutes of release. Challenges were at successive 3 C increments above acclimation or the previous challenge temperature. Fish were first observed to delay their entrance into the intervening heated water at challenge temperatures of 12 to 15 C above acclimation. At each increment above 12 to 15 C over acclimation temperature, delay in transit increased; however, complete group inhibition was never achieved. Above their critical thermal maximum (CTM) the reward was achieved even at the expense of deaths among the achievers. Responses were the same whether fish were challenged individually or as groups. Fish exposed to their CTM without prior challenges at less stressful temperatures responded similarly to those receiving progressively greater challenges.

• Research Organization: Environmental Protection Agency, Duluth, MN
• OSTI ID: 5566428
• Journal Information: Trans. Am. Fish. Soc.; (United States), Vol. 109:1
• Country of Publication: United States
• Language: English

Related Subjects

63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
BEHAVIOR
TEMPERATURE EFFECTS
TROUT
CONDITIONED REFLEXES
BIOLOGICAL ADAPTATION
FEEDING
MORTALITY
TEMPERATURE GRADIENTS
THERMAL POLLUTION
ANIMALS
AQUATIC ORGANISMS
FISHES
POLLUTION
REFLEXES
VERTEBRATES
560205* - Thermal Effects- Vertebrates- (-1987)