title: Comparison of the frequency of the growth hormone pseudogene between juvenile and adult female masu salmon Oncorhynchus masou.
abstract: The proportions of individual masu salmon Oncorhynchus masou whose genotypic and phenotypic sex differed were compared among juvenile and adult fish in three rivers, and genotypically male but phenotypically female individuals were observed 6-16% more often among adults than among juveniles. This suggests that during the transition from juvenile to adult, survival rates of genotypically male but phenotypically female individuals are higher than those of normal females. In contrast, genotypically female but phenotypically male individuals were only found in the juvenile period, which suggests that they exhibit a decreased survival rate in comparison with normal males.
authors.affiliation: Department of Veterinary Nursing and Technology, Nippon Veterinary and Life Science University, 1-7-1 Kyonancho, Musashino, Tokyo 180-8602, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Yamamoto
authors.affiliation: College of Life Sciences, Ritsumeikan University, Nojihigashi 1-1-1, Kusatsu, Shiga 525-8577, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Kitanishi
mesh_terms: D000818:Animals; D005260:Female; D005838:Genotype; D013006:Growth Hormone / Q000235:genetics*; D007564:Japan; D008297:Male; D017683:Oncorhynchus / Q000235:genetics*; D010641:Phenotype; D011544:Pseudogenes; D017422:Sequence Analysis, DNA; D012732:Sex Determination Analysis
chemical_list: D013006:Growth Hormone
keywords: Pacific salmon; genotypic sex; growth; phenotypic sex; survival rate