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<p>Bottom trawling is one of the most widespread and ecologically consequential fishing practices, yet its full impact on marine biodiversity remains poorly understood. We present the first global inventory of fish species reported in bottom trawl fisheries, compiled from 236 sources, from the United Nations Food and Agriculture Organization’s document repository and supplemental literature. The database covers fisheries within exclusive economic zones and records catch locations, maximum body sizes, conservation status on the International Union for Conservation of Nature Red List, fishery scale, and gear type. We documented 2997 fish species from 9621 records, spanning 1043 genera, 323 families, and 75 orders. In one-third of families, at least half of all species were caught by bottom trawls. Species recorded tended to be larger than demersal marine fishes overall, likely reflecting under-reporting of smaller taxa by species; gear selectivity or commercial value alone do not explain their scarcity. Extrapolation models suggested true species richness ranged from 3700 to 5697 species. The greatest numbers of species were reported from the Western Central Pacific, Western and Eastern Indian Oceans, and Eastern Central Atlantic. Among 2181 species with conservation assessments, 78% were Least Concern&#xa0;and 15% threatened or Near Threatened, with trawl-related pressures more frequently cited in assessments of threatened or Near Threatened species. Among all species in our database,&#xa0;23% were either Data Deficient or not evaluated at all.&#xa0;Most fishes were reported as bycatch, often in otter trawls targeting shrimps or multi-species assemblages. These findings highlight the global scope of bottom trawl interactions with marine species and emphasize the need to consider full ecological consequences in fisheries management and conservation.</p>

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Global diversity of marine fishes caught in bottom trawl fisheries

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Sarah J. Foster,
  • Syd J. Ascione,
  • Isak B. Boyd,
  • Amanda C. J. Vincent

摘要

Bottom trawling is one of the most widespread and ecologically consequential fishing practices, yet its full impact on marine biodiversity remains poorly understood. We present the first global inventory of fish species reported in bottom trawl fisheries, compiled from 236 sources, from the United Nations Food and Agriculture Organization’s document repository and supplemental literature. The database covers fisheries within exclusive economic zones and records catch locations, maximum body sizes, conservation status on the International Union for Conservation of Nature Red List, fishery scale, and gear type. We documented 2997 fish species from 9621 records, spanning 1043 genera, 323 families, and 75 orders. In one-third of families, at least half of all species were caught by bottom trawls. Species recorded tended to be larger than demersal marine fishes overall, likely reflecting under-reporting of smaller taxa by species; gear selectivity or commercial value alone do not explain their scarcity. Extrapolation models suggested true species richness ranged from 3700 to 5697 species. The greatest numbers of species were reported from the Western Central Pacific, Western and Eastern Indian Oceans, and Eastern Central Atlantic. Among 2181 species with conservation assessments, 78% were Least Concern and 15% threatened or Near Threatened, with trawl-related pressures more frequently cited in assessments of threatened or Near Threatened species. Among all species in our database, 23% were either Data Deficient or not evaluated at all. Most fishes were reported as bycatch, often in otter trawls targeting shrimps or multi-species assemblages. These findings highlight the global scope of bottom trawl interactions with marine species and emphasize the need to consider full ecological consequences in fisheries management and conservation.