To compare culture common carp (Cyprinus carpio) fecundity in Guilan and Mazandaran provinces and its relationship with female length, weight, height and age

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.