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Effect of photoperiod on the temperature tolerance of the blacknose dace, Rhinichthys atratulus
Journal article   Peer reviewed

Effect of photoperiod on the temperature tolerance of the blacknose dace, Rhinichthys atratulus

Kenneth M. Terpin, James R. Spotila and Robert R. Koons
Comparative biochemistry and physiology. A, Comparative physiology, v 53(3), pp 241-244
1976
PMID: 2428

Abstract

Blacknose dace, Rhinichthys atratulus, were acclimated to long daylength, 16 hr of light and 8 hr of darkness (L:D 16:8), and short daylength, 8 hr of light and 16 hr of darkness (L:D 8:16), at 20°C. Long daylength fish had a higher incipient upper lethal temperature (29·9°C) than short daylength fish (28·8°C). Long daylength fish had a significantly higher ( P ≤ 0·0.01) mean resistance time at all but one lethal test temperature. Lethal temperature of R. atratulus is compared to that of ecologically related species.

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