Maturity and spawning in Otolithus ruber (Schn.) and Johnius dussumieri (C.& V.)

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

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    Abstract

    From the ova diameter measurements, it has been observed that O.ruber spawns only once a year during July to October, and J. 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. rafier and a majority (62.86%) is mature at 200 mm. In J. 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 J. 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-Kochi > Marine Capture > Demersal Fisheries Division
    Subject Area > CMFRI > CMFRI-Kochi > Marine Capture > Demersal Fisheries Division
    CMFRI-Kochi > Marine Capture > Demersal Fisheries Division
    Subject Area > CMFRI-Kochi > Marine Capture > Demersal Fisheries Division
    Depositing User: Dr. V Mohan
    Date Deposited: 27 Jul 2010 08:56
    Last Modified: 17 Jan 2023 04:33
    URI: http://eprints.cmfri.org.in/id/eprint/1618

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