Underwater treasure: reef fish in the Lagoa do Jequiá Marine Extractive Reserve, south coast of Alagoas
DOI:
https://doi.org/10.37002/biodiversidadebrasileira.v16i2.2841Keywords:
Southwestern Atlantic, tropical conservation , marine ichthyofaunaAbstract
On the southern coast of the state of Alagoas, extensive reef areas still unknown to science hold economic importance for fisheries and are also strategic for the conservation of Brazilian marine biodiversity. In this context, we conducted an inventory of the reef fish assemblage of the Lagoa do Jequiá Marine Extractive Reserve (RESEX Jequiá), a federal protected area. Sampling was carried out from 2021 to 2025 using scientific diving methods, including underwater visual census and active search. Additionally, fishery landings were opportunistically monitored in order to expand the list of recorded species. A total of 135 reef fish species were identified, comprising 126 Actinopterygii and 9 Chondrichthyes (Elasmobranchii). The families Labridae (11 spp.) and Carangidae (10 spp.) were the most species-rich. Richness estimates suggest a potential of between 180 and 294 species for RESEX Jequiá, indicating that local diversity is still underestimated. Of the recorded species, 38% (51 spp.) are considered fishery resources, and 13% (17 spp.) are nationally classified as threatened with extinction. Among these the critically endangered Epinephelus itajara, Scarus trispinosus and Sphyrna mokarran. In light of these results, we reinforce the importance of RESEX Jequiá and its reef environments as priority areas for marine conservation. We also highlight the urgency of implementing long-term monitoring programs to generate continuous knowledge that supports effective management and conservation strategies.
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Copyright (c) 2026 Márcio J. C. A. Lima Júnior, José A.C.C. Nunes, Ricardo J. Miranda, Flávio S. Ferreira Júnior, Sergio R. Albuquerque, Zach A. Hornfeld, Everson C. Santos, Tiago Albuquerque, Taciana Kramer Pinto, Cláudio L. S. Sampaio

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