The comparative fishing between structure of conventional and the both modified (40,42 mm) such
as; conventional have depth about 1.2 m inner net of 50 meshes and outter net of 11 meshes (Boutson et
al., 2006). and modify types have depth about 0.9 m inner net 33 meshes (removed from upper selvage 17
meshes depth of inner net) including 2 meshes depth of outter net from upper selvage in both size. So
study on catch composition of conventional type are divided into 3 parts such as top (17 meshes depth from
upper selvage), middle (17 meshes depth) and bottom section (16 meshes depth to lower selvage). While
modified types are divided into 2 parts because 1/3 of net depth are cut off. Then the top and the bottom
section only. Study has determined the code of net set in relation to the type of the net such as innernet
mesh size 40 mm.conventional is control, 40 mm. modified.is modified 1 and 42 mm. modified.is modified 2.