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- W172922192 abstract "Auxis rochei, popularly known as the bullet tuna, is the smallest of all tuna species available in Indian waters. Its distributionis reported from all maritime states but it forms a fishery of commercial importance only in the south-west region (Kerala,Tamil Nadu and Karnataka) with targeted fishery being carried out in southern Kerala. The average annual catch (2006-2010) is estimated at 3,131 t, constituting 2.8% of the total tuna landings. Commercial exploitation is mainly by gillnets andsmall hook and lines with the 0-1 yr old fishes comprising bulk of the commercial catch. The length-weight relationship wasestimated as W=0.0076L3.249 with no significant difference between the sexes. Size at first maturity was estimated at 23.6 cmand fecundity estimated was 12,03,258. A. rochei spawns throughout the year with peak during July-September. Zooplankton,fishes and crustaceans were the dominant food items recorded. The von Bertalanffy growth parameters estimated wereL∞= 42.3 cm, K= 0.61 yr-1 and t0= -0.0337. Mortality estimates were M=1.18 and Z=5.90 and F=4.72 with a high exploitationrate of E=0.80, calling for appropriate management measures to be adopted for continued exploitation at sustainable levels." @default.
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- W172922192 date "2013-06-27" @default.
- W172922192 modified "2023-09-23" @default.
- W172922192 title "Biology and fishery of the bullet tuna, Auxis rochei (Risso, 1810)in Indian waters" @default.
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