Abstract Studies on the quantum of non-edible biota (NEB) discarded during the trawl fishing operations hardly exist in literature. The limited availability of baseline data on this specific area of research has resulted in an inadequate assessment of the ecological implications of plant and animal species caught and discarded during trawl operation. In this context, an attempt was made to document the marine faunal diversity and biomass of NEB destroyed and discarded by trawl operations along the Thoothukudi coast, Gulf of Mannar Marine Biosphere Reserve (GoMMBR), India. The results of study revealed that percentage composition of different phyla represented in the NEB bycatch during the sampling period are Echinodermata (47.81%), Cnidaria (16.40%), Mollusca (13.34%), Arthropoda (9.94%), Porifera (5.13%), Chordata (0.12%) and Others (7.27%). In total, 16 taxonomic groups were represented where in group-wise assemblage of the biomass was dominated by sea stars (25.61%) followed by sea urchins (16.64%), jellyfishes (16.40%), gastropods (7.80%), stomatopods (6.65%), sponges (5.13%), while other taxonomic groups contributed less than 5% of the total NEB biomass. In terms of species diversity, echinoderms showed the highest number (21 species) followed by molluscs (20 species), arthropods (11 species), cnidarians (6 species), and others form fewer in numbers (

中文翻译：

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底拖网捕捞对非食用生物群的破坏：全球范围内的生态和保护问题

摘要 关于拖网捕捞作业中丢弃的非食用生物群 (NEB) 数量的研究几乎没有文献报道。这一特定研究领域的基线数据有限，导致对拖网作业期间捕获和丢弃的动植物物种的生态影响评估不足。在此背景下，试图记录印度马纳尔湾海洋生物圈保护区 (GoMMBR) 的 Thoothukudi 海岸拖网作业破坏和丢弃的 NEB 的海洋动物群多样性和生物量。研究结果显示，采样期间NEB副渔获物中不同门的百分比组成为棘皮动物（47.81%）、刺胞动物（16.40%）、软体动物（13.34%）、节肢动物（9.94%）、孔虫（5.13%） , 脊索动物 (0.12%) 和其他 (7.27%)。总共代表了 16 个分类群，其中生物量的分组组合以海星（25.61%）、海胆（16.64%）、水母（16.40%）、腹足类（7.80%）、口足类（6.65 %)、海绵 (5.13%)，而其他分类群的贡献不到 NEB 总生物量的 5%。在物种多样性方面，棘皮动物数量最多（21种），其次是软体动物（20种）、节肢动物（11种）、刺胞动物（6种），其他种类较少（