TY  - BOOK
AU  - Jayakody, D.S.
AU  - Costa, H.H.
TI  - Study on  the Prawn Fishery by -Catch from the Coast of Sri Lanka
N1  - The ratio for shrimp: by-catch was estimated from the data 
collected from shrimping vessels operated in Negombo and 
Chilaw areas of the west coast of Sri Lanka for a period 
of two ye ars, from February 1979 to February. The
by*<atch comprised of 40 species of fin fish from 13 
different families. The results indicated a shrimp:by-catch 
ratio of 1.3:1 in Negombo and 1:1.8 in Chilaw. The average 
catch rates were calculated to be 1.53 kg/hr for, shrimp and 
,1 .18 kg/hr for by catch for Negombo waters and 1.79 kg/hr 
and 3.12 kg/hr for Chilaw waters. Although the by-catch 
composition showed seasonal variations, four species of fish 
namely Leiognathus splendens. Leiognathus fasciatus. Opisthopterus tardoore and NemiptSrus .iapohicus accounted for 60—70% of the total by-catch

ER  -