Does Anaerobic Activity Differ Seasonally or between Sexes in Yellow Perch Populations?

Anaerobic activities, such as those associated with spawning, foraging for prey, and predator avoidance, may vary seasonally and by sex as energetic demands change. We quantified the glycolytic muscle enzyme lactate dehydrogenase (LDH) to determine whether enzyme concentrations differed seasonally o...

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Bibliographic Details
Published in:Transactions of the American Fisheries Society (1900) 2012, Vol.141 (1), p.199-203
Main Authors: Schoenebeck, Casey W, Brown, Michael L
Format: Article
Language:English
Subjects:
females
fish
foraging
glycolysis
lactate dehydrogenase
males
muscles
Perca flavescens
seasonal variation
sexual dimorphism
spawning
spring
summer
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Summary:Anaerobic activities, such as those associated with spawning, foraging for prey, and predator avoidance, may vary seasonally and by sex as energetic demands change. We quantified the glycolytic muscle enzyme lactate dehydrogenase (LDH) to determine whether enzyme concentrations differed seasonally or between sexes in yellow perch Perca flavescens populations that exhibited female-biased sexual size dimorphism (SSD). Patterns in LDH for a yellow perch population with fast-growing fish and one with slow-growing fish varied significantly among seasons and between sexes. The LDH concentration was lower during spring than during summer and fall, indicating that activity costs associated with nonspawning burst-swimming activities (e.g., foraging for prey or predator avoidance) are greater than costs associated with spawning activity. In addition, LDH concentrations were greater in males than in females for both populations. Therefore, we hypothesize that greater cumulative, year-round anaerobic activity (rather than just spawning activity) by males is responsible for female-biased SSD in yellow perch. Received December 2, 2010; accepted August 13, 2011
ISSN:1548-8659
0002-8487
1548-8659
DOI:10.1080/00028487.2012.655119