Daily temperature shifts during the embryonic period do not alter the phenotypic sex ratio of spring-run chinook salmon

The purpose of this study was to determine whether daily-elevated water temperature shifts during the embryonic period in spring-run chinook salmon (Oncorhynchus tshawytscha) could influence the phenotypic sex ratio. Three families of salmon embryos were divided into two groups; one was moved betwee...

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Published inFish physiology and biochemistry Vol. 28; no. 1-4; p. 169
Main Authors Nagler, J.J., Wheeler, P., Thorgaard, G.H.
Format Journal Article
LanguageEnglish
Published Dordrecht Springer Nature B.V 01.01.2003
Subjects
Brackish
Fish
Freshwater
Marine
Oncorhynchus tshawytscha
Salmon
Sex ratio
Water temperature
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Summary:The purpose of this study was to determine whether daily-elevated water temperature shifts during the embryonic period in spring-run chinook salmon (Oncorhynchus tshawytscha) could influence the phenotypic sex ratio. Three families of salmon embryos were divided into two groups; one was moved between 7.5 degree C and 12 degree C each day (6-8 hours) for 105 days while the other (control) remained at a constant 7.5 degree C. Sex ratios varied between the three families, but no significant sex ratio differences were observed between the control and temperature shifted groups.
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ISSN:0920-1742
1573-5168
DOI:10.1023/B:FISH.0000030515.78343.a0