نویسندگان
1 گروه شیلات، دانشکده شیلات و محیط زیست، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، صندوق پستی: 15739-49138
2 گروه مهندسی مواد و طراحی صنایع غذایی، دانشکده صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، صندوق پستی: 15739-49138
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
In the present study the effect of different levels of ethanol extract of Corchorus olitorius on reproductive performance and some growth factors in Xiphophorus helleri were studied. Ethanol extract (70%) of plant extracted with microwave and concentrated using the rotary-evaporator. The extract was then powderd using the freez-dryer. The prepared extract was incorporated with the artificial feeds at concentration of 0.0 (A), 200 (B), 400 (C) and 800 (D) mg kg-1 of dry diet and fed to fish for a period of 14 weeks. The results showed that Gonadosomatic index, the weight of female broodstock, length of female broodstock and fry survival was significantly higher in group 3 as compared to other groups (P<0.05). Relative fecundity was lowest in group A. The results of the relative fecundity showed that there was no significant difference (P>0.05) between group A and B and also between C and D. The length and weight of fry in groups 3 and 4 were significantly higher than other groups (P<0.05). The gonadosomatic index was found lower in group 1 and 2 as compared to other groups. Moreover, no significant differences in the sex ratio were observed within the experimental groups (P>0.05).
کلیدواژهها [English]