Undifferentiated sex in fish


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Sep 29, Gonad development of fish is unusual in the sense that the sexually undifferentiated period can last from weeks until years (Saito and Tanaka.

Undifferentiated sex in fish
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Genetic architecture of sex determination in fish: applications to sex ratio control in aquaculture


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Genetic architecture of sex determination in fish: applications to sex ratio control in aquaculture

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Oct 23, Food availability during sex differentiation shapes the juvenile testis transcriptome, . Fish used for objective 1 were sexually undifferentiated.


Percentages of male, female and undifferentiated fish in experimental groups ratios was delayed to allow further growing and identification of phenotypic sex.

Description:The four groups used were: Moreover, while fast-growing fish took energy from glucose, as deduced from the pathways affected and the analysis of protein-protein interactions examined, in slow-growing fish lipid metabolism and gluconeogenesis was favored. Animals are capable of sensing their inner energy levels and the external energy availability and thus act accordingly by long-term investments in processes like growth, immune functions or reproduction when food availability is not a problem, or by ensuring survival when food is scarce [1]. The first experiment showed that transiently but severely reducing food supply starting towards the end, middle or even at the beginning of the sex differentiation period — and thus negatively affecting growth — did not affect resulting sex ratios, indicating that gender was already fixed before the above mentioned period started [19].

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