期刊
AQUACULTURE
卷 420, 期 -, 页码 154-159出版社
ELSEVIER
DOI: 10.1016/j.aquaculture.2013.10.028
关键词
Domestication; Rainbow trout; Burst/sprint swimming speed; Oncorhynchus mykiss; Androgenesis
资金
- National Science Foundation [EF 0328594]
- USDA National Institute of Food and Agriculture (Agriculture and Food Research Initiative [2009-35205-05067]
Domestication selection combined with inadvertent selection for high growth rate and large body size are common in hatchery salmonids. However, evolutionary trade-offs of various fitness components with body size and domestication are likely. This study explores potential trade-offs between growth and sprint swim performance among five clonal lines of rainbow trout (Oncorhynchus mykiss), varying in the number of generations under domestication. We hypothesized that clonal lines of trout derived from highly domesticated populations would have higher growth rates but slower sprint swimming performance relative to clonal lines derived from less domesticated populations. Individuals from each of the five lines were repeatedly measured for body size and sprint swimming performance over 10-15 weeks. Our findings indicate significant differences in body size and sprint swimming performances between the less-domesticated and the more-domesticated lines, with more domesticated lines being larger but poorer swimmers. Implications for the survival and reproduction of hatchery salmonids released into the wild are explored. (C) 2013 Elsevier B.V. All rights reserved
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