First Advisor

Larry I. Crawshaw

Date of Publication

1987

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Biology

Department

Biology

Language

English

Subjects

Goldfish -- Physiology, Brown bullhead -- Physiology, Temperature -- Physiological effect

DOI

10.15760/etd.5620

Physical Description

1 online resource (64 p.)

Abstract

Two species of fish, Carassius auratus and Ictalurus nebulosus, were subjected to cold acclimation regimes. Acclimation temperatures were slowly lowered to 3°c, then held for a period of time. At various times during this regime, fish were taken out and allowed to spend time in a temperature gradient to determine their preferred temperatures. Carassius were left in the gradient just long enough to determine a measure of the acute temperature preference, while Ictalurus were left in the temperature gradient for longer periods of time to observe any changes that might occur as the fish adjusted to selected temperatures. In both species of fish, lower acclimation temperatures and increased time spent at low temperatures caused a preference for lower temperatures in the gradient.

Rights

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Comments

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Persistent Identifier

http://archives.pdx.edu/ds/psu/21133

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