Journal of the Marine Biological Association of India

Maturity and spawning in Decapterus dayi Wakiya

Volume 23 Issue 1&2

P. V. Sreenivasan

Abstract

Decaptenis dayi Wakiya spawns over a prolonged period from February to November with intense spawning during February to April. Intraovarian eggs in the spawning stock range in size from 0.73 to 1.06 mm and only a single oil globule is present. The fish spawns during night in the inshore waters. K_n values oscilate between 0.92 and 1.00. Both male and female mature at a size of 130-139 mm. Generally males were dominant in the fishery. Fecundity estimates varied from 16,388 to 1,07,640 in various size groups. Relationship between fecundity and length and ovary weight and weight in logarithmic values was observed to be linear.

Date : 31-12-1981