نوع مقاله : فیزیولوژی (جانوری)
نویسندگان
گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In this experiment, the effects of different levels of Nettle (Urtica dioica) Hydroalcoholic extracts were investigated on gonads histological structure and sexual hormones in Goldfish (Carassius auratus) broodstock. Trial was performed randomly on three levels: 2, 4 and 8 gr/kg of the extracts and the control group. 5 fish with an average weight of 21.88 ± 4.70 g per 500-liter fiberglass tank were stocked and under the same conditions for 8 weeks fed with different levels of Nettle (Urtica dioica) extracts. Monitoring of plasma sex steroid levels revealed that experimental diets had significantly effect on progesterone levels in females fed 2gr/kg Nettle (P<0.05), but not significant in testosterone in males (P>0.05). In both males and females, gonads were in stage IV. Results showed that supplementation of diet with Nettle extracts can effect on fish reproduction.
کلیدواژهها [English]