Evaluation of squae mesh codends for bycatch reduction in demersal trawling, off Andhra Pradesh, India
Evaluation of squae mesh codends for bycatch reduction in demersal trawling, off Andhra Pradesh, India
Date
2010
Authors
Rajeswari, G.
Prakash, R.R.
Sreedhar, U.
Journal Title
Journal ISSN
Volume Title
Publisher
Society of Fisheries Technologists (India)
Abstract
Due to poor selectivity of commercial trawls, large quantities of fish
are discarded in the sea. Impact of codend mesh size on trawl fishery
has been studied by Rajeswari et al. (1998). The discards often consist
of juveniles of commercially important species, which may impact on the
yields of commercial species. Mesh size regulations for trawl gears aim
to reduce fishing mortality by allowing small sized fishes and juveniles
to escape. The shape of the mesh affects the selectivity of codend. The
mesh lumen of the diamond mesh closes up under tension during towing
operation and prevent escapement of fish. In the square mesh codends,
the mesh will remain open and facilitate escapement of juveniles small
szied fishes (Robertson, 1983; Robertson and Ferrow, 1988; Robertson
and Stewart, 1988; Kunjipalu etal., 1994, Varghese etal., 1996; Prakash
et al., 2008). Selectivity information is an important tool for fishery
managers for regulating the mesh sizes to determine the minimum mesh
sizes of target fish species.
Description
Keywords
Demersal trawling, trawl fishery, commercial species, ribbonfishes
Citation
Proceedings of the National Seminar on Conservation and Sustainability of Coastal Living Resources of India, 1-3 December 2009, Cochin, ed.by Meenakumari, B. et.al 341-351