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Comparison of Methods for Determining Low Temperature Tolerance: Experiments with Pinfish, Lagodon rhomboides

Wayne A. Bennett and Frank W. Judd
Copeia
Vol. 1992, No. 4 (Dec. 18, 1992), pp. 1059-1065
DOI: 10.2307/1446638
Stable URL: http://www.jstor.org/stable/1446638
Page Count: 7
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Comparison of Methods for Determining Low Temperature Tolerance: Experiments with Pinfish, Lagodon rhomboides
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Abstract

We compared low temperature tolerance of pinfish, Lagodon rhomboides, using static and dynamic methods to test the hypothesis that these methods yield similar results. In addition, a complete low temperature static profile was established for pinfish. The static T L,50 (7.9 C) was significantly higher than the dynamic CTMin (3.4 C). Static methods can provide useful standards for comparison of cold tolerance among fish species, but dynamic experiments are more accurate predictors of responses by naturally occurring fish populations. The static thermal profile in pinfish acclimated to 22.0 C fixed the incipient lower lethal temperature at 11.7 C, and the minimum survival temperature at -0.5 C, with resistance time (h) between these points equal to 10(Temperature( C)× 0.386-1.809).

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