Rudiger W Schulz

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A study was carried out in tilapia in order to see whether the gonadotropin (GtH) beta subunits show distinct patterns of expression at different stages of their reproductive development. Male and female tilapia hybrids (Oreochromis niloticus x O. aureus) were collected at various times of the year, and a number of parameters were measured in order to(More)
Early puberty affects in particular males in commercially farmed European fin-fish species, resulting in reduced growth and feed conversion, and the potential problem of unwanted genetic impacts on wild stocks. Controlling photoperiod can be an effective way to prevent early sexual maturation. Combining national and international resources provided the(More)
Dmrt1 and amh are genes involved in vertebrate sex differentiation. In this study, we cloned dmrt1 and amh cDNAs in zebrafish (Danio rerio) and investigated the effects of exposure to 17a-ethinylestradiol (EE2), during early life on their patterns of expression and impact on the subsequent gonadal phenotype. Expression of both amh and dmrt1 in embryos was(More)