Fig. 4From: Sexual characteristics of high-temperature sterilized male Mozambique tilapia, Oreochromis mossambicus Histology of sterilized and normal testes. a Sperm and spermatogenic germ cells were not observed in the testes of fish in the HT group. The expanded efferent ducts were filled with sperm fluid slightly stained with hematoxylin. b Active spermatogenic germ cells including sperm were seen in the testis of fish in the control groupBack to article page