Maternal influence and population differences in activities of mitochondrial and glycolytic enzymes in emergent sockeye salmon (Oncorhynchus nerka) fry

被引:3
|
作者
Patterson, DA [1 ]
Guderley, H
Bouchard, P
Macdonald, JS
Farrell, AP
机构
[1] Simon Fraser Univ, Sch Resource & Environm Management, Cooperat Resource Management Inst, Fisheries & Oceans Canada, Burnaby, BC V5A 1S6, Canada
[2] Univ Laval, Dept Biol, Quebec City, PQ G1K 7P4, Canada
[3] Simon Fraser Univ, Dept Biol, Burnaby, BC V5A 1S6, Canada
关键词
D O I
10.1139/F04-076
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
Full-sib groups were created from two reproductively isolated sockeye salmon (Oncorhynchus nerka) populations, Weaver and Gates creeks, to test the hypotheses that prefed, emergent fry from different populations have different energetic capacities as revealed by whole-body maximal enzyme activities and that maternal influences account for a large portion of the variability in enzyme activities within fry populations. Weaver fry had higher mass-specific activities for lactate dehydrogenase, citrate synthase, and cytochrome c oxidase as well as higher protein-specific activities of lactate dehydrogenase. We ascribed these higher enzyme activities to the associated performance requirement of a more difficult prefeeding fry migration for Weaver fry. There were significant differences in mass- and protein-specific enzyme activities for all three enzymes among maternal broodlines within each population, suggesting that genetic differences existed among families. This study of maximal enzyme activities in juvenile sockeye highlights the importance of maternal influences, potential adaptive significance of differences in metabolic capacity, and the need for examining cellular physiology in an ecological perspective.
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页码:1225 / 1234
页数:10
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