000			nam a22 7a 4500
999			_c9380 _d9380
003			OSt
005			20181226102205.0
008			181214b xxu||||| |||| 00| 0 eng d
040			_cNARA
100			_917476 _aAmarasinghe, U.S.
245			_aGillnet Selectivity of Ompok Bimaculatus (SILUR) & Puntius Dorsalis (Cyprinidae) in a Small-Sriverine Fishery
260			_c1997, _aSri Lanka, _bNational Science Council,
300			_a169-184p.
440			_917483 _aJournal of National Science Council
520			_aGilnet selectivity of two indigenous fish species, Ompok bimaculatu.- and Puntius dorsalis was determined in a small-scale fishery at Uruwal Oya, i: the Gampaha district. The optimal lengths (L^) of the two species for difieren mesh sizes were determined by the Baranov-Holt method. The relationship between L^and mesh size (M) of gillnet for the two species are described by th> following equations: ■ O. bimaculatus: = 4.076 + 3.694 M (r = 0.992; p < 0.01) P. dorsalis: = 2.445 + 3.410 M (r = 0.994; p < 0.001) The mean sizes of maturity of O. bimaculatus (21.6 cm for males and 2C cm for females) and P. dorsalis (13.4 cm for males and 14.8 cm for femali approximately correspond to Lopt in stretched gillnet mesh sizes of 5.8 cm and .' cm respectively according to the above relationships. Therefore there seems be a need for regulating mesh size of gillnets in this fishery in order to prevt immature O. bimaculatus and P. dorsalis being caught. Keywords: Baranov-Holt method, Biodiversity, Cyprinidae, Fisheries mans ment, Freshwater fish, Gillnet selectivity, Ompok bimaculatus, Puntius dorse. Riverine fish, Siluridae, Uruwal Oya.
700			_917482 _aPushpalatha, K.B.C.
942			_cRP _2ddc