A study of the life history of Brazilian sardine, Sardinella brasiliensis: II. spawning in 1970 and 1971

Distribution and abundance of eggs of Sardinella brasiliensis (=S. aurita), are presented for the years 1970 and 1971 and compared with that of the previous year (1969). The spawning size of three spawning seasons was calculated using Tanaka's method. Incubation time of sardine eggs was estimated using the method of Ahlstrom. During three spawning seasons a considerable change in the relative spawning size was observed. The spawning season (during spring and summer in the southern hemisphere) of 1970-71 was poor when compared with those of 1969-70 and 1971-72. A slight change in the average diameter of eggs in different spawning seasons was also observed. The relation between oceanographie conditions and spawning size was analysed. It is suggested that the warm water covering the spawning ground during the 1970-71 spawning season may have caused an unsuccessful spawning in this year.

Bibliographic Details

Main Author:	Matsuura,Yasunobu
Format:	Digital revista
Language:	English
Published:	Instituto Oceanográfico da Universidade de São Paulo 1975
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0373-55241975000100001
Tags:	Add Tag No Tags, Be the first to tag this record!