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<p>Trawling, a widely practiced yet energy-intensive fishing method in India, relies heavily on otter boards to optimize fuel efficiency, catch rates, and economic performance. This study, conducted by the ICAR-Central Institute of Fisheries Technology (CIFT), evaluates the performance of a novel slotted V-form otter board (VSOB) against traditional non-slotted V-form otter boards (NSOB). Comprehensive field trials assessed critical parameters, including fuel consumption, net opening, and catch efficiency, under standardized trawling conditions. Results demonstrate that the VSOB design achieves a significant reduction in fuel consumption, averaging 24.7&#xa0;L per hour a 15% decrease compared to NSOBs attributable to its streamlined structure that minimizes drag. Catch efficiency also improved, with an average haul yield of 19.5&#xa0;kg for VSOBs compared to 17.1&#xa0;kg for NSOBs. Furthermore, VSOBs facilitated the capture of a diverse range of pelagic and demersal species, meeting the operational requirements of large trawlers in southern India. Enhanced hydrodynamic performance allowed VSOBs to maintain broader spatial coverage without increasing engine RPM, improving overall operational efficiency. Fabricated from marine-grade steel, VSOBs exhibit superior durability, doubling the service life of conventional boards while reducing maintenance costs. Widespread adoption of VSOBs by 50% of India’s mechanized trawling fleet could result in annual fuel savings of approximately 60,005&#xa0;L and a CO2 emissions reduction of 160.8 metric tons per hour. These findings underscore the transformative potential of advanced otter board designs in promoting energy efficient and environmentally sustainable fishing practices.</p>

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Enhancing Trawling Efficiency: Comparative Evaluation of Slotted and Non-Slotted V-Form Otter Boards for Fuel and Catch Optimization in Indian Fisheries

  • 期刊论文

  • 发表日期：

    2025年7月18日

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  • M. P. Remesan,
  • Paras Nath Jha,
  • Bejawada Chanikya Naidu

摘要

Trawling, a widely practiced yet energy-intensive fishing method in India, relies heavily on otter boards to optimize fuel efficiency, catch rates, and economic performance. This study, conducted by the ICAR-Central Institute of Fisheries Technology (CIFT), evaluates the performance of a novel slotted V-form otter board (VSOB) against traditional non-slotted V-form otter boards (NSOB). Comprehensive field trials assessed critical parameters, including fuel consumption, net opening, and catch efficiency, under standardized trawling conditions. Results demonstrate that the VSOB design achieves a significant reduction in fuel consumption, averaging 24.7 L per hour a 15% decrease compared to NSOBs attributable to its streamlined structure that minimizes drag. Catch efficiency also improved, with an average haul yield of 19.5 kg for VSOBs compared to 17.1 kg for NSOBs. Furthermore, VSOBs facilitated the capture of a diverse range of pelagic and demersal species, meeting the operational requirements of large trawlers in southern India. Enhanced hydrodynamic performance allowed VSOBs to maintain broader spatial coverage without increasing engine RPM, improving overall operational efficiency. Fabricated from marine-grade steel, VSOBs exhibit superior durability, doubling the service life of conventional boards while reducing maintenance costs. Widespread adoption of VSOBs by 50% of India’s mechanized trawling fleet could result in annual fuel savings of approximately 60,005 L and a CO2 emissions reduction of 160.8 metric tons per hour. These findings underscore the transformative potential of advanced otter board designs in promoting energy efficient and environmentally sustainable fishing practices.