نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه شیلات، دانشکده کشاورزی و منابع طبیعی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران
2 موسسه آموزش عالی علمی کاربردی علوم و صنایع شیلاتی میرزا کوچک خان، سازمان تحقیقات، آموزش و ترویج کشاورزی، رشت، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
This research was conducted to compare culture common carp fecundity in Guilan and Mazandaran Provinces related to theirs length, weight, height and age, respectively. Sixty fish saples with 4-5 Maturity stages cached and studied from Guilan and Mazandaran provinces, 30 from each during February 2018 to November 2018. The Mean of body weight, total length and age for Guilan and Mazandran samples were (4.22±0.99) and (3.13±0.30) kg, (57.33±4.68) and (60.93±3.90) cm, (3.80±0.38) and (3.50±0.51) years. The mean absolute and relative fecundity of Gulan and Mazandaran samples were 239900±57921.67 and 139900±23008.76 and
57629.31±5583.58 and 43568.639±2129.45 respectively. The mean height and egg diameters measured 17.50±2.06 and 14.60±1.42 and, 0.759±0.11682 and 0.640±0.4291. The mean of fecundity increased with increation of fish forkal length, body weight and age. The Regression rate were calculated between fecundity and fish body weight for Guilan and Mazandaran (0.94 and 0.87), fecundity and total length (0.72 and 0.81) and fecundity and fish age (0.68 and 0.71) respectively. There was significant differentiation in fecundity between Guilan andMazandaran samples.
کلیدواژهها [English]