Browsing by Author "D.Jude"
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ReprintItem Open Access DETERMINATION OF OPTIMUM MESH SIZE FOR GILL NET TO EXPLOIT THE LONG TAIL TUNA,THUNNUS TONGGOL (BLEEKER)(Cheiron, 2002-12) D.Jude; N.Neethiselvan; P.Gopalakrishnan; G.SugumarThunnus tonggol, a coastal tuna popularly called long tail tuna forms an important fishery in Thoothukkudi coastal waters from June to September and are caught in gill nets with the mesh size ranging from 6.0 to 13.5 cm. The fishery is constituted by the length group 300mm to 575 mm The present study deals with the optimization of mesh size to capture the mature fishers of commercial value. The gill net mesh size of 10.64 cm. is optimum for exploiting the T. tanggol of size 426 - 575 mm from Thoothukudi waters.ReprintItem Open Access Optimization of Mesh Size of Gill Nets for Sardinella gibbosa (Bleeker)(2001) N. Neethiselvan; D.Jude; T. VaitheeswaranFishing conducted in inshore waters off Thoothukkudi (Tamil Nadu) during 1997-98 using 16 units of nylon gill nets with 26,28, 30 and 32 mm mesh size made up of 210D/ 1/2 twine revealed that the proportionality co-efficient (k) of the gill net selectivity equation for Sardirella gibbosa was 0.104. Gill net with mesh size 29.6 rim was found to be ideal for,the commercial _exploitation or s. gibbosa which contributes considerably to the Lesser sardine fishery.of Thoothukkudi coast. The details of enmeshing pattern of different length groups of 5. gibbosa in gill nets of different mesh sizes are presented.ReprintItem Open Access Optimization of Mesh Size of Gill Nets to Capture Amblygaster sirm (Walbaum) in Thoothukkudi Coastal Waters, Southeast Coast of IndiaN. Neethiselvan; D.Jude; P. Gopalakrishnan; B. SundaramoorthyAmblygaster sirm, a lesser sardine, popularly called 'Keeri Meen Chalai' form a notable fishery in Thoothukkudi coastal waters with peak season from September to February. A. sirm are captured in small meshed drift gill nets with the mesh size ranging from 26 mm to 32 mm. The fishery is mainly constituted by the size group 65-210 mm. The present study deals with the optimization of mesh size to capture the commercially significant length group (141-190 mm) and enmeshing pattern of A. sirm in gill nets with various mesh sizes. Tell optimum mesh size for the commercial exploitation of A. sirm in Thoothukkudi coastal waters is found to be 30.5 mmReprintItem Open Access Standardization of Mesh Size of Gill Nets for the Commercial Exploitation of Kawakawa, Euthynnus affinis (Cantor) in Thoothukkudi Coastal Waters, Southeast coast of India(2002) N. Neethiselvan; D.Jude; P. Gopalakrishnan; G. SugumarEuthyrtnus affinis forms notable fishery in Thoothukkudi coastal waters with peak season from June to September Euthynnus affinis is captured in small meshed gillnets popularly called 'PODIVALAI' with mesh size ranging from 60 mm to 115 mm. The present study deals with the standardization of mesh size to capture the commercially significant length group (476-600 mm) of E. affinis and its enmeshing pattern in gillneis with three different mesh size. The optimum mesh size for the commercial exploitation of E. affinis in Thoothukkudi coastal waters is found to be 104.2 mm. Further the study recommends to discourage the use of gill net with 50 mm mesh size for the capture of E. The optimum mesh size for the commercial exploitation of E.affinis in Thoothukkudi coastal waters is found to be 104.2 mm. Further the study recommends to discourage the use of gill net with 50 mm mesh size for the capture of E. aFfinis as this net captures the juveniles of e affnis.