Title: Asymmetry as a Measure of Embryological Stress in Golden Shiners
Abstract:Abstract Recent changes in techniques for producing farm‐raised baitfish include spawning and hatching indoors, advances that provide better control over these steps during the production cycle. Howev...Abstract Recent changes in techniques for producing farm‐raised baitfish include spawning and hatching indoors, advances that provide better control over these steps during the production cycle. However, developing embryos experience different conditions indoors than in the traditional outdoors pond production technique. Stress during embryological development can result in small random differences between the left and right sides of a bilateral trait. For characters influenced by the environment, the degree of asymmetry can be a measure of the level of stress experienced during embryological development. Asymmetry was compared in morphological characters between two groups of golden shiners Notemigonus crysoleucas representing indoor and outdoor spawning and hatching techniques. Relative weight was also compared in fingerlings produced by the two techniques. There were no differences in asymmetry between the two groups for seven characters. Two characters were significantly more asymmetric in the group produced indoors, but one character was significantly more asymmetric in the group produced outdoors. Relative weight did not differ between the two groups. Based on the assumption that these characters are influenced by the environment and on observed similarities in asymmetry and relative weight, no consistent differences in embryological stress resulting from the two different production techniques were found.Read More
Publication Year: 2005
Publication Date: 2005-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 3
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