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<p>The dolnet is a fixed bagnet fishery operating along the Gujarat coast in the north-eastern Arabian Sea and contributes substantially to the regional marine fish catch. The dolnet fishers in the region often face conflicts with other sub-sectors, such as gillnetters and trawlers, due to overlapping fishing grounds and damage to dolnet structures, including gear and poles. The current study aims to spatially map the mechanized and outboard dolnetters (MDOL and OBDOL) using the haversine function and variations in catch rates at spatial and temporal scales. The catch rates were higher in MDOL crafts (52.92 ± 37.56&#xa0;kg/hr) than in OBDOL (33.32 ± 30.40&#xa0;kg/hr). The depth and distance of fishing by MDOL were estimated at 30.51 ± 14.66&#xa0;m and 26.02 ± 17.26&#xa0;km, respectively. The distance and depth of OBDOL are 7.45 ± 3.98&#xa0;km and 14.56 ± 7.42&#xa0;m, respectively. The MDOL catch rates were highest in Zone I at 81.31 ± 36.38&#xa0;kg/hr, significantly greater than northern zones (ANOVA F(8, 2120) = 49.44, <i>p</i> &lt; 0.001). The higher catch rates were observed in the southern zones (I, II &amp; VII) than in the northern zones. The highest catch rates were observed in the IV quarter for MDOL and in the III quarter for OBDOL. These findings demonstrate the value of spatially explicit assessment for identifying fishing grounds, potential zones, and supporting conflict-sensitive management of this geographically unique fishery. The data and spatial maps generated in the present study help resolve conflicts and formulate policies by applying Marine Spatial Mapping (MSP) and Ecosystem-based Fishery Management (EBFM) techniques.</p>

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Spatial Mapping of Geographically Unique ‘Dolnet Fishery’ Along the Gujarat Coast of the North-eastern Arabian Sea

  • 期刊论文

  • 发表日期：

    2026年7月3日

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  • Vinaya Kumar Vase,
  • Jayasankar Jayaraman,
  • Rajan Kumar,
  • Ajay Nakhawa,
  • Shikha Rahangdale,
  • Eldho Varghese,
  • Grinson George,
  • Prathibha Rohit

摘要

The dolnet is a fixed bagnet fishery operating along the Gujarat coast in the north-eastern Arabian Sea and contributes substantially to the regional marine fish catch. The dolnet fishers in the region often face conflicts with other sub-sectors, such as gillnetters and trawlers, due to overlapping fishing grounds and damage to dolnet structures, including gear and poles. The current study aims to spatially map the mechanized and outboard dolnetters (MDOL and OBDOL) using the haversine function and variations in catch rates at spatial and temporal scales. The catch rates were higher in MDOL crafts (52.92 ± 37.56 kg/hr) than in OBDOL (33.32 ± 30.40 kg/hr). The depth and distance of fishing by MDOL were estimated at 30.51 ± 14.66 m and 26.02 ± 17.26 km, respectively. The distance and depth of OBDOL are 7.45 ± 3.98 km and 14.56 ± 7.42 m, respectively. The MDOL catch rates were highest in Zone I at 81.31 ± 36.38 kg/hr, significantly greater than northern zones (ANOVA F(8, 2120) = 49.44, p < 0.001). The higher catch rates were observed in the southern zones (I, II & VII) than in the northern zones. The highest catch rates were observed in the IV quarter for MDOL and in the III quarter for OBDOL. These findings demonstrate the value of spatially explicit assessment for identifying fishing grounds, potential zones, and supporting conflict-sensitive management of this geographically unique fishery. The data and spatial maps generated in the present study help resolve conflicts and formulate policies by applying Marine Spatial Mapping (MSP) and Ecosystem-based Fishery Management (EBFM) techniques.