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Lack of metabolic thermal compensation during the early life stages of ocean pout Zoarces americanus (Bloch & Schneider) : a benthic, cold‐water marine species
Author(s) -
Killen S. S.,
Brown J. A.,
Gamperl A. K.
Publication year - 2008
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.2007.01735.x
Subject(s) - biology , acclimatization , benthic zone , temperate climate , citrate synthase , ecology , metabolic rate , zoology , biochemistry , enzyme , endocrinology
The present study investigated the metabolic response of young ocean pout Zoarces americanus to temperature acclimation (3 v. 11° C), and to acute changes in water temperature from 3 to 17° C. The Q 10 value for standard metabolic rate between acclimation temperatures was 5·3, warm‐acclimated fish displayed higher rates of oxygen uptake at all temperatures during the acute thermal challenge, and changes in whole‐body citrate synthase activity were qualitatively similar to those seen for metabolism. These results indicate that, in contrast to temperate species, young ocean pout from Newfoundland do not show thermal compensation in response to long‐term temperature changes.