Journal of Environment and Sociobiology

N. A. Talwar ¹, B. Hanumanthappa ²

Affiliations
1 Department of Fishery Engg, West Bengal University of Animal and Fishery Sciences, Kolkata-94, IN
2 College of Fisheries (KVAFSU), Mangalore–575 002, Karnataka state, IN

Abstract

Studies on selectivity of penaeids were carried out by comparing the catches of the conventional two-seam overhang trawl with that of experimental two-seam overhang trawl having square mesh panels of 45 mm mesh size in the forward part of upper belly and 28 mm mesh size in the cod end. Alternate trawling technique was used by maintaining similarity in towing direction, towing duration, speed and depth of operation to minimize possible errors between the trawls. The results revealed that the experimental trawl caught less quantity of juvenile penaeids than that of conventional trawl having diamond mesh webbing in the body and the cod end. The by-catch was also reduced considerably indicating that the new gear would be helpful for the better management of penaeids resources.

Keywords

Selectivity, Shrimps, Trawls, Diamond Mesh and Square Mesh.

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R. C. Barman ¹, S. S. Dana ¹, N. A. Talwar ²

Affiliations
1 Dept. of Fishery Extension, West Bengal University of Animal and Fishery Sciences, Chakgaria, Panchasayar, Kolkata-700 094, IN
2 Dept. of Fishery Engineering, West Bengal University of Animal and Fishery Sciences, Chakgaria, Panchasayar, Kolkata-700 094, IN

Abstract

For evaluating sustainable development in today's scenario, empowerment of target community is imperative just to take their own decision and to know the pattern of equitable distribution of benefit derived from any development programme like fisheries or aquaculture in order to achieve a quality life. The findings of the study revealed that woman empowerment was positively and significantly associated with the knowledge level of beel users at 1% level of probability. So it can be said that empowerment helps one to improve his or her living standard. Hence empowering the women to take decision on different fisheries and aquaculture activities is regarded as one of the most important inputs for sustainable development of beel fisheries.

Keywords

Sustainable Development, Floodplain Wetlands, Beel Fisheries, Women Empowerment.

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B. Goswami ¹, S. S. Dana ², N. A. Talwar ³

Affiliations
1 Dakshin Dinajpur Krishi Vigyan Kendra, Uttar Banga Krishi Viswavidylaya, West Bengal, IN
2 Dept. of Fishery Extension, F/O Fishery sciences, West Bengal University of Animal and Fishery Sciences, West Bengal, IN
3 Dept. of Fishery Engineering, F/O Fishery sciences, West Bengal University of Animal and Fishery Sciences, West Bengal, IN

Abstract

Investigations were carried out to study the women engaged in different fishery management practices and to identify independent variables, which are related with the dependent variables, viz., decision making and supervision of women in fish culture in Dakshin Dinajpur district of West Bengal. Randomly selected 120 fisherwomen revealed that majority of them participate in different management practices like application of mohua oil cake (70%), liming (87.5%), application of organic manure (89.16%), and application of inorganic fertilizers (62.5%) and regular netting operation (82.5%). The findings revealed that out of twelve variables only six variables, namely, age, area of the ponds, education, family educational status, economic status and aspiration were significantly correlated with decision making process of women in fish culture. The findings also revealed that out of twelve variables only three variables, namely, age, economic status and aspiration were significant at 0.01 level of probability.

Keywords

Women, Aquaculture, Fishery Management.

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N. A. Talwar ¹, V. N. Nayak ², N. C. Nandi ³

Affiliations
1 W. B. University of Animal and Fishery Science, Mohanpur, Nadia. West Bengal, IN
2 Department of Marine Biology, Kamatak University, Dharwar, Kamataka, IN
3 Zoological Survey Of India, M-Block, New Alipore, Kolkata-700 053, IN

Abstract

While conducting fishery resource surveys and efficiency studies on estuarine fishing gears of West Bengal during 2002-03 and 2003-04, an attempt was made to inventorise indigenous fishing gears of Hooghly-Matia estuarine ecosystems of West Bengal. This forms the basis of the present communication. In 1906, Sir K. G. Gupta (1908) undertook investigations on the fisheries of the province of Bengal. Since then, several workers have studied the fish and fisheries resources of Hooghly-Matla estuaries (Hora, 1949; Pillay and Ghosh, 1962; Saha, 1970; Mitra et al, 1997; Pramanik and Nandi, 2004). However, very little work is done on fishing gears of this region (Saha, 1970).

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N. A. Talwar ¹, D. S. Sheshappa ², B. Hanumanthappa ²

Affiliations
1 Dept. of Fishery Engineering, (W.B.U.A.FS) Kolkata-94., IN
2 Dept. of Fishery Engineering College of Fisheries (UAS), Mangalore-575002, IN

Abstract

Reduction of by-catch in two-seam overhang trawl was studied by using a square mesh panels in forward part of upper belly and codend and comparison made with thai of the conventional two-seam overhang trawl. Fishing cruises were carried out randomly at depths of between 24 m and 34 m isobaths in the inshore waters of Mangalore coast. Alternative hauling technique was followed for maintaining similarity in towing direction, duration, speed and depth of operation to minimize the possible errors between the trawls. The results showed that the average by-catch was about 5.5 times lesser in two-seam overhang trawl using a square mesh panels in forward part of upper belly and codend than conventional twoseam hang trawl. However, the difference m reduction of by-catch in both conventional as well as experimental trawls was not found to be statistically significant.

Keywords

Two-seam Overhang Trawl, Square Mesh Panels, By-Catch.

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N. A. Talwar ¹, B. Hanumanthappa ²

Affiliations
1 Department of Fishery Engineering, West Bengal University of Animal and Fishery Sciences, Kolkata 700 094, IN
2 College of Fisheries (UAS), Mangalore-575002, IN

Abstract

Investigations were carried out to study the comparative impact of 28 mm square mcslies and diamond mesiies in codends of High Opening Bottom Trawl (HOBT) on different sizes of dominant fin fishes. The fishing trials were carried out through the M.F.V.Dopihin, a 13.26 m OAL wooden stern trawler, fitted with Ruston engine developing 102 BHP at 1800 r.p.m. of College of fisheries (UAS), Mangalore. Atlemative haul techniques were followed under identical condition to provide the equal chance for both the trawls. The results shown that the 50% of retention lengths of Mackerels, Pomfrets, Soles and Ribbon fishes (Trichinrus spp.) were comparatively found better in high opening bottom trawl (HOBT) with 28 mm mesh size square mesh codend and for clupeids (Sardinella spp.) and Silver bellies (Leiognaihiis spp.) were same in both the codends of square mesh and diamond mesh of same mesh size in high opening bottom trawl (HOBT).

Keywords

High Opening Bottom Trawl (HOBT), Square Mesh, Diamond Mesh, Finfishes and 50% of Retention Length.

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