Evaluation of Economic Impact on Juvenile Landings of Cephalopods in Mumbai Waters, Northwest Coast of India

Ramkumar, S and Sundaram, Sujit and Jaiswar, A K and Ranjith, L and Chakraborty, S K and Vinod, K (2015) Evaluation of Economic Impact on Juvenile Landings of Cephalopods in Mumbai Waters, Northwest Coast of India. Current World Environment, 10 (3). pp. 1004-1010.

Ranjith L_2015_Current World Environment_An Evaluation of Economic Impact on Juvenile Landings.pdf

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    Economic assessment of juvenile landings of 5 dominant cephalopods at New Ferry Wharf (NFW) landing centre, Mumbai was carried out during January to December, 2013. Dominant cephalopod fishery recorded include one species of squid, Uroteuthis (P) duvaucelii, three species of cuttlefishes, Sepia elliptica, Sepia pharaonis, Sepiella inermis and a species of octopus, Cistopus indicus together contributing 98% of total cephalopod landings. Estimated total annual economic gain calculated using bioeconomic model was Rs. 33.22 crores with estimated biomass gain of 4995 t per annum, if juveniles are allowed to grow up to length at first maturity (Lm)/Lmean. Among five species, C. indicus contribute maximum with 64.07 % of average juvenile catch followed by U. (P) duvaucelii (26 %), S. elliptica (23.63 %), S. inermis (23.27 %), and S. pharaonis (12.85 %). On these resources, while in S. inermis, both Lm equals Lmean indicates breakeven point for the species. The study revealed that peak spawning season of these species coincides with peak juvenile landings which may result in reduction of overall size range thus will lead to loss of fishery in economic as well as ecosystem regime. The study indicates the improvement of harvest biomass by 2.95 times which would result in generating additional revenue to the fishers by a margin of 3.71 times; if juveniles are allowed to grow up to Lm/ Lmean whichever is greater. Based on finding of present study management measures such as temporary fishing holidays at juveniles fishing grounds, feeding grounds and spawner abundance grounds which in turn allow these high valued species to contribute to the fishery with high economic gain and sustainable utilization of the resources may be adopted.

    Item Type: Article
    Uncontrolled Keywords: Cephalopods, Bycatch, Juvenile fishing, Economic loss
    Subjects: Marine Fisheries > Marine Fishing
    Molluscan Fisheries > Cephalopods
    Marine Fisheries > Fish landing
    Fishery Technology > Fishing
    Divisions: CMFRI-Mumbai
    CMFRI-Calicut (Kozhikode)
    Depositing User: Arun Surendran
    Date Deposited: 24 Jun 2017 08:40
    Last Modified: 24 Jun 2017 08:40
    URI: http://eprints.cmfri.org.in/id/eprint/11955

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