Mesh selectivity studies on mackerel gill nets
Mesh selectivity studies on mackerel gill nets
Date
1993
Authors
Mathai, T.J.
Vijayan, V.
Abbas, M.S.
Doss, R.S.M.
Iyer, H.K.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India), Cochin
Abstract
Results of mesh selectivity in gill nets for the capture of mackerel Rastrelliger kanagurta
(Cuvier) with nets made of nylon twine 210x1x2, 210x1x3 and 210x2x3 in mesh sizes
40,45,50,55 and 60 mm are discussed in this communication. 50 mm mesh size nets made
out of nylon twine 210x1x2 were found optimum for the exploitation of commercially
accepted size group with a total length of 190-200 mm. The peak value of gilled girth to
mesh perimeter ratio for 50 mm nets was found to be 1.1. Linear regressions were fitted
for conversion of length to weight and gilled girth to length. Twine size-mesh size relationship
was also worked out. 88% of the mackerel caught and 66.1% of the total catch were
obtained from dusk operations.
Description
Keywords
Citation
Mathai, T.J., Vijayan, V., Abbas, M.S., Doss, R.S.M. and Iyer, H.K. (1993) Mesh selectivity studies on mackerel gill nets. In: Proceedings of the national workshop on low energy fishing, 8-9 August, 1991, Cochin (Eds. George, V.C., Vijayan, V., Varghese, M.D., Radhalakshmi, K., Thomas, S.N. and Joseph, J.), SOFT(I), Cochin