Maturity and spawning in Otolithus ruber (Schn.) and Johnlos dussumierl(C. & V.)

Devadoss, P (1969) Maturity and spawning in Otolithus ruber (Schn.) and Johnlos dussumierl(C. & V.). Indian Journal of Fisheries, 16 (1&2). pp. 117-128.


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From the ova diameter measurements, it has been observed that O. ruber spawns only once a year during July to October, and /. dussumieri spawns twice a year, first between January and February and again between June and September. Indication of sexual maturity is observed in the 170 mm size group in O. rafieranda majority (62.86%) is mature at 200 mm. In /. dussumieri sexual maturity is manifest in the 140 mm size group and a majority offish (51.85%) is mature at 160 mm. Fecundity in the size range of 180-290 mm varies between 44,621 and 179,659 mature eggs in O. ruber, and in /. dussumieri of size range 195-235 mm the number of mature eggs varies between 142,005 and 225,988.

Item Type: Article
Uncontrolled Keywords: Maturity and spawning; Otolithus ruber; Johnlos dussumierl
Subjects: Demersal Fishes > Sciaenids
Divisions: CMFRI-Cochin > Marine Capture > Demersal Fisheries
Depositing User: Dr. V Mohan
Date Deposited: 27 Jul 2010 08:56
Last Modified: 09 Sep 2015 15:13

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