Temperature is one of the most commonly studied of our knowledge on the molecular regulation of vertebrate sex is environmental cues for sex determination. Hypoxia alters sex hormones, sex ratio and favors a male-dominated population in fish.
References 1. Sex can also be determined by signals from the environment and there are several environmental effects known to influence sex of an organism.
View Article Google Scholar Mol Ecol 8: — Sambrook J, Russell D.
Each datapoint represents the percentage of males for a given parental pair, whereas the horizontal line indicates the mean male ratio. However, sox9a mutants are embryonic lethal due to defects in cartilage development Yan et al. In experiment 2, 30 populations were analyzed spanning about six and a half months.
BMC Neurosci However, association with sex. Multiple sex-associated regions and a putative sex chromosome in zebrafish revealed by RAD mapping and population genomics. Zebrafish6—
As such, animals with more germ cells are more likely to develop as female. It has often been anecdotally observed that rearing density affects sex ratios in laboratory zebrafish, where high rearing density leads to increased proportions of males.
Kossack and Bruce W. In zebrafish, nr0b1 is expressed in the brain and interrenal gland, the fish equivalent of the adrenal gland, during early development Zhao et al. Waltham, MA: Academic Press.