@article{fdi:010096282,
  title = {{B}alancing fishing effort along the tropical tuna abundance-size spectrum},
  author = {{T}idd, {A}. and {T}olotti, {M}. {T}. and {G}uillotreau, {P}atrice and {B}arrier, {N}icolas and {D}agorn, {L}aurent},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he ecosystem approach to fisheries is widely recognised as a key management goal, yet its definition and implementation remain debated. {M}ost fisheries management relies on single-species strategies with technical measures to reduce bycatch. {H}owever, selective removals disrupt species composition, affecting ecosystem dynamics and resilience. {W}e present a proof-of-concept model based on balanced harvesting that allocates fishing pressure proportionally across three tuna stocks-yellowfin ({T}hunnus albacares), skipjack ({K}atsuwonus pelamis), and bigeye tuna ({T}hunnus obesus)-in the {I}ndian {O}cean according to their size-biomass ratios. {T}he model optimises fishing effort by gear using a predefined objective function based on length-based population dynamics, ensuring a balanced harvest while maintaining each tuna species' biomass within its maximum sustainable yield ({BMSY}) limit. {B}y assigning fishing mortality ({F}-multiplier) to each fleet, the model aims to maintain, within the bounds of {BMSY} for each stock, the ecosystem structure (based on size-abundance relationships) over a 20-year simulation. {R}esults indicate significant reductions in fishing mortality across gears relative to 2020 levels. {W}hile some gears, such as purse seine free-school, show increased catches and revenues (146%), others, like purse seine log-school, experience declines (-22%). {O}verall, fishing at {BMSY} improves total revenues and catches by 51% and 34%, respectively, compared to 2020. {T}his work demonstrates that it is possible to maintain each tuna stock within {BMSY} bounds by managing fishing fleets while preserving ecosystem structure, a significant goal of the ecosystem approach to fisheries.},
  keywords = {{S}ustainability ; {B}alanced harvest ; {T}unas ; {I}ndian ocean ; {F}ishing fleets ; {F}leet-based management ; {OCEAN} {INDIEN}},
  booktitle = {},
  journal = {{E}cological {M}odelling},
  volume = {514},
  numero = {},
  pages = {111495 [10 p.]},
  ISSN = {0304-3800},
  year = {2026},
  DOI = {10.1016/j.ecolmodel.2026.111495},
  URL = {https://www.documentation.ird.fr/hor/fdi:010096282},
}