000			nam a22 7a 4500
999			_c9473 _d9473
003			OSt
005			20181227092045.0
008			181214b xxu||||| |||| 00| 0 eng d
040			_cNARA
100			_917659 _aDayaratne P.
245			_aAn Assessment of Kawakawa (Euthynnus Offinis) Stock on the West Coast of Sri Lanka
260			_bAsian Fisheries Society, _aPhillippines, _c1991,
300			_a219-226p.
440			_917693 _aAsian Fisheries Science _n; Vol.2
520			_aThe kawakawa (Euthynnus affinis) stock on the west coast of Sri Lanka was assessed by using length data collected from the drift gill net fisheiy. Sampling was carried out at three major landing sites from August 1986 to July 1987. Data were analyzed using the compleat ELEFAN computer package. Two sets of estimates of parameters K and Lj 0.78 year'1,61.5 cm and 0.52 year"1, 76.8 cm were obtained. The natural mortality (M) was estimated at 1.46 year'1. The present level of exploitation estimated using the catch curve and cohort analysis was E = 0.24 and 0.14, respectively. A relative yield-per-recruit analysis showed that a higher yield could be obtained if effort were increased. These results together with catch data analysis suggest that the kawakawa stock on the west coast of Sri Lanka is not fully exploited.
700			_917694 _aDe Silva, Janaka
942			_cRP _2ddc