000			nam a22 7a 4500
999			_c9491 _d9491
003			OSt
005			20181227093009.0
008			181214b xxu||||| |||| 00| 0 eng d
040			_cNARA
100			_917659 _aDayaratne P.
245			_aAge Determination and Growth of Oreochromis Mossambicus (Peters) from a Sri Lanka Lake
260			_bNARA, _aColombo,
300			_a1-22p.
520			_aAge and growth of the mouthbrooding fish Oreochromis mossambicus (PETERS) from Colombo , (=Beir&) Lake in Sri Lanka were determined by using otolith daily growth increments. Specimens measuring 2.6 to 15.6cm were aged between 35 and 263 days, and the duration of the larval stage based on the number of daily rings in the nuclear zone of the otolith was estimated to be 8 to 25 (mean = 14) days. The monthly growth of 0. mossambicus in Colombo Lake was of the form L = 29.5 {1 - exp [- 0.083 (t + 0.013)]} cm TL. A comparison of the growth parameters of this and other 0. mossambicus populations indicates that the Colombo Lake fish has a faster growth rate and a smaller asymptotic length.
700			_917714 _aBlay, John JR.
942			_cRP _2ddc