TY  - BOOK
AU  - Karunasinghe, W.P.N.
TI  - Fishery and Length Based Poulation Studies of Amblygaster Sirm (Walbaum) from the Southern Coastal Waters of Sri Lanka

PB  - NARA
N1  - The fishery for Amblveas ter alxm in the south coast of
Sri Lanka is carried out by small meshed gill nets with
mesh sizes ranging from 28 to 38 tnm. These nets are
operated by non mechanised as well as mechanised crafts ' 1 in depths ranging from 20 to 70 m. The catch per unit i ■ i >*' effort of mechanised crafts are higher than that of non T <• . j. ; • mechanised crafts. The best fishing season was obse.rved 
.to be between November and January.
The length frequency data of A.sirni collected during 
September 1983 to August 1984 was analysed using ELEFAH 
computer programmes. This has shownjan asymptotic length 
(Lm ) of 23.0 cm and a growth constant .(k) of 0.93. The 
exploitation, rate was fonnd to be 0.31. A recruitment i
pattern with two pulses separated by five to six months 
was also observed for this fish stock
ER  -