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Thermoperiodism in Sea-run Cutthroat Trout ( Salmo clarki clarki)

Heath, W.G.

Science 142(3591): 486-488

1963


ISSN/ISBN: 0036-8075
PMID: 17748163
DOI: 10.1126/science.142.3591.486
Accession: 056556799

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Thermal tolerances from square-wave cycled temperature acclimation were compared with those from constant acclimation temperatures. A response to the maximum temperature of the square-wave cycle occurred. The acclimation thermoperiod was varied from one-fourth to twice the 24-hour cycle, and a relative maximum of tolerance resulted for the 24-hour thermoperiod. This suggests physiological adaption to natural 24-hour thermoperiods.

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