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- W41385696 abstract "Annual average perch production was 2541.2 tonnes at the catch rate of 88.8 kg/unit by average effort of28612 units of small mechanised trawlers measuring 14 m and below. Peak periods of perch fishery were duringJune-September and a minor peak during December-February. Inspite of the comparative decline in the catch rateof perch, there is a scope for further increase in perch production provided the effort is increased. The age andgrowth of Scolopsis bimaculatus is described by the von Bertalanffy growth equation i.e. = 322 (1-e ''''* (tto.oois))This species attains a size of 163.6, 243.9, 283.5 and 303.0 mm in 0.5, 1.0, 1.5 and 2.0 years. Length - weightrelationship of this species is defined by the equation Log W = -5.6848 + 3.3699 Log L and the Woo is 584 g. Thenatural mortality coefBcient (M) is estimated to be 2.2, the total mortality coefficient (Z) is 3.2 and the fishingmortality rate (F) is 1.0. Yield per recruit of this species indicates that for the prevailing M/K ratio 1.56 and ageat first capture 0.4353 the F^^^ which can produce the Y^^^ of 52.3 g is 4.5 and suggests that the fishing effort maybe increased further from the present level to enhance the yield of this species as in the case of L. nebulosus andN. delagoae. The fish is a carnivore feeding on fishes, amphipods, Squilla spp., brittle stars, prawns, cuttlefish,polychaetes and molluscs." @default.
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- W41385696 date "1994-01-01" @default.
- W41385696 modified "2023-09-23" @default.
- W41385696 title "Exploitation of perch fishery resource off Tuticorinby small mechanised trawlers with an accounton the biology of Scolopsis bimaculatus Ruppell" @default.
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