4.6 Article

Balanced harvest as a potential management strategy for tropical small-scale fisheries

期刊

ICES JOURNAL OF MARINE SCIENCE
卷 78, 期 7, 页码 2547-2561

出版社

OXFORD UNIV PRESS
DOI: 10.1093/icesjms/fsab136

关键词

Ecosystem approach to fisheries; mixed fisheries; seascape connectivity

资金

  1. INCT (National Institute of Science and Technology, CNPq) in TropicalMarine Environments-INCT-AmbTropic [610013/2011-4]
  2. CNPq (National Council for Scientific and Technological Development, CNPq) [479845/2013-1, 407125/2013-2, 207786/2015-1]
  3. European Union's Horizon 2020 research and innovation programme [734271, 817578]
  4. CAPES (Coordination for the Improvement of Higher Education Personnel)
  5. CNPq (Conselho Nacional de Desenvolvimento Cientifico e Tecnologico), Brazil [308554/2019-1, 307422/2020-8]
  6. Beatrice Padovani Ferreira
  7. H2020 Societal Challenges Programme [817578] Funding Source: H2020 Societal Challenges Programme

向作者/读者索取更多资源

The study found that all ontogenetic classes of the twelve selected species caught by northeast Brazil SSFs along an estuary-shelf break gradient were in line with a balanced harvest (BH) pattern. Most gears predominately caught young individuals and low trophic level species, suggesting that size limitations alone may not be sufficient to prevent overfishing.
Tropical small-scale fisheries (SSFs) are characterised by their multidimensionality (fleets, gears, habitats, and species). As many targeted species move between habitats throughout their life cycle, managing coexisting fleets exploiting the same resource is challenging. However, the SSFs operating over multiple habitats target a variety of species and sizes and could benefit from a management strategy such as balanced harvest (BH)-harvesting all species and sizes in proportion to their production rate. To test this hypothesis, we characterised the fishing pattern (distribution of overall fishing pressure on species and sizes) of northeast Brazil SSFs targeting migratory species along an estuarine-shelf break gradient. Specifically, we described the relative captures by gear type and developed a conceptual model to understand fishers' strategies. All ontogenetic classes of the twelve selected species were caught along the estuary-shelf break gradient, achieving a fishing pattern in line with BH. Young individuals and low trophic level species predominated in most gears. In that context, size limitations would not be sufficient to prevent overfishing and could prejudice the fleets that target small sizes. An ecosystem-based approach like BH, aiming to regulate the overall fishing pressure and consistent with the existing fishing pattern, should instead be promoted.

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