Diversidade da ictiofauna capturada em currais de pesca na Praia da Lagoa da Volta, Aranaú/CE

Abstract

Fishing corrals are fixed traps in a "V" shape and built with wood, placed along the beach with very pronounced tidal dynamics. This study aimed to analyze the ichthyofauna captured by fishing corral at Praia da Lagoa da Volta, Aranaú-CE, Brazil, verifying the diversity by the Shannon (H"), Simpson (1/D) and Berger-Parker (1/d) indices, in addition to the species richness by the Margalef index (d), the evenness by the Pielou index (J), as well as the abundance of the species. Monthly collections were carried out between October 2023 and June 2024. The samples were obtained in four corrals of the aforementioned beach, with 11,983 individuals being captured, inserted in 62 species. The Chondrichthyes Class, with five species, was represented by three Families. The Osteichthyes Class, with 57 species and 29 Families. The diversity was considered medium (H"=2.11 bits/inds., 1/D=4.84, and 1/d=2.61), with high species richness. (d=6.5) however, with a non-significant equivalence (J=0.35). The atlantic bumper, Chloroscrombrus chrysurus was considered Abundant; the swordfish, Trichiurus lepturus was Slightly Abundant and the other species were classified as Rare.