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Title Reproductive cycle and maturity stages of Johnius carutta Bloch, 1793 off Visakhapatnam, south-east coast of India
 
Names Kumar, M.S.
Rajeswari, G.
Kishore, B.
Date Issued 2013 (iso8601)
Abstract A total of 3,406 gonad samples of Johnius carutta caught off Visakhapatnam (during 2008-‘09), were analysed to study the
reproductive cycle and maturity stages. Seven maturity stages were observed in the gonads. Spawning season was assessed
based on gonado-somatic index and monthly occurrence of matured females based on the general appearance of gonads, its
relative length to the abdominal cavity and developmental stages of ova. Monthly distribution of ripe (stage VI) and spent
(stage VII) females were considered for ascertaining the probable spawning season. The restricted brief spawning period
lasts for three months from February to April and the species spawn only once in a year. The peak breeding activity was
observed in the month of February (26.64%) followed by March (18.62%) and April (15.38%) in which high
gonado-somatic index (GSI) values (February 3.50%; March 3.46%; April 2.74%) were recorded. Spent females were observed
from June to December with peak in the month of August (13.78%) and October (10.80). The size at first maturity was
estimated at 17.5 cm in females. The fecundity varied from 35,650 to 1, 96,496 in individuals of 140 to 217 mm and its mean
fecundity rcorded was 81,290 ± 5014 (n=38).
Genre Learning Object
Topic fecundity
Identifier Indian Journal of Fisheries 2013: 60(3), 23-26