TY  - BOOK
AU  - Dayaratne P.
AU  - Blay, John JR.
TI  - Age Determination and Growth of Oreochromis Mossambicus (Peters) from a Sri Lanka Lake
CY  - Colombo
PB  - NARA
N2  - Age 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
ER  -