Seasonal Variation of Critical Thermal Maximum in the Redbelly Dace, Phoxinus erythrogaster (Cyprinidae)

Critical thermal maximum (CTM) was determined for samples of redbelly dace, Phoxinus erythrogaster, on each of six collection dates between July 1981 and June 1982 to examine the effect of thermal acclimatization on temperature tolerance. Body weight and length were measured to discover if a relatio...

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Bibliographic Details
Published in:The Southwestern naturalist 1987-12, Vol.32 (4), p.435-438
Main Author: Scott, Nancy L.
Format: Article
Language:English
Subjects:
Acclimatization
Ambient temperature
Body temperature
Cold tolerance
Critical temperature
Fish
Freshwater fishes
Heat tolerance
Seasons
Water temperature
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Summary:Critical thermal maximum (CTM) was determined for samples of redbelly dace, Phoxinus erythrogaster, on each of six collection dates between July 1981 and June 1982 to examine the effect of thermal acclimatization on temperature tolerance. Body weight and length were measured to discover if a relationship exists between these variables and CTM in P. erythrogaster. A statistical difference between CTMs for the six capture dates was found, indicating that acclimatization is a factor in the thermal tolerance of these fish. A relationship was found between CTM and ambient temperature. No evidence was found to indicate that a relationship exists between CTM and body size in this species.
ISSN:0038-4909
DOI:10.2307/3671475