当前世界环境

The economic assessment on juvenile landings of four dominant marine catfishes at New Ferry Wharf (NFW) landing centre, Mumbai, Northwest coast of India was carried out during January to December, 2013. The dominant catfishesviz.Nemapteryx caelata(19.7 %),Plicofollisdussumieri(21.5 %),P.tenuispinis(24.8 %) andOsteogeneiosusmilitaris(27.5 %) together contributing 93% of total marine catfish landings of the state. Among four species, the juvenile landings ofN. caelatacontribute maximum(93.17 %) followed byP.dussumieri(57.14 %),O.militaris(36.11 %) andP.tenuispinis在11月(21.43%)与最大着陆to March . The bioeconomic model reveals that if juveniles are allowed to grow up to length at first maturity (L_m); an estimated total annual economic gain will be Rs. 13.15 crores with an estimated biomass gain of 1222 t per annum. The estimated total annual biomass is increased by 2.07 times with an increase in additional revenue by 3.7 times would have been realised. The results of present study suggest that sustainable harvest of these resources would have been yielded maximum economic return to the fishers. With the help of stakeholders participatory approach, management measures such as strict mesh size regulation, effort restriction on bottom trawl up to 50 m depth and awareness campign on catching juveniles and adult in particulat to the oral incubated male ariids, would have been implemented during November to March to avoid growth over fishing.