On the maturity of Sardinella dayi Regan in KarwarudRegion (West coast of India)

摘要

Study on spawning biology of Sardinella dayi Regan for 1979-83 period shows that the size at first maturityudis attained around 140 mm. For determining maturity and nature of spawning, condition factor (K) andudgonadosomatic index (GSI) were utilized. The spawning in this species is protracted and lasts fromudOctober - December, and from January - May on a reduced scale. Relation of fecundity to length andudfecundity to weight when tested statistically showed better correlation in 1979 and 1980, than in the restudof the years and the analysis of variance showed different rates of egg production during different years.udStudies on fecundity showed that generally 66,000 eggs are released by each individual in the spawningudact.