Analysis of landings from the Fernando de Noronha fishery (Brazil)

Authors

  • Rosangela Lessa Departamento de Pesca, Universidade Federal Rural de Pernambuco-UFRPE, Dois Irmãos, 52.171-900, Recife, PE. Fax: 081-4411711. Bolsista-Pesquisador do Conselho Nacional de Desenvolvimento Científico e Tecnológico-CNPq.
  • Leonardo Sales Divisão de Recursos Pesqueiros, Secretaria da Agricultura do Estado de Pernambuco, Av. Caxangá, Cordeiro, Recife, PE. 47 I
  • Maria Raquel Coimbra Departamento de Pesca, Universidade Federal Rural de Pernambuco-UFRPE, Dois Irmãos, 52.171-900, Recife, PE. Fax: 081-4411711.
  • Dinalva Guedes Departamento de Pesca, Universidade Federal Rural de Pernambuco-UFRPE, Dois Irmãos, 52.171-900, Recife, PE. Fax: 081-4411711.
  • Teodoro Vaske Jr Departamento de Pesca, Universidade Federal Rural de Pernambuco-UFRPE, Dois Irmãos, 52.171-900, Recife, PE. Fax: 081-4411711.

DOI:

https://doi.org/10.32360/acmar.v31i1-2.31373

Keywords:

Fernando de Noronha archipelago, oceanic islands, trolling and hand-line fishery, artisanal fishery, Sphyraena barracuda, Caranx lugubris, Thunnus spp.

Abstract

The surface fishery in Fernando de Noronha (3'50'24"5 I 32'24'48"W) is carried out using trolling and bottom handline takes place around the archipelago, within a 5-mi limit. The great barracuda (Sphyraena barracuda), three tuna species (Thunnus albacares, Thunnus atlanticus and Thunnus alalunga) and the black-jack (Caranx lugubris) make
up 42%, 36% and 7% of landings, respectively. 5ampling conducted from 1988 to 1990 showed a decrease in catches for ali species together (44.56 to 14.86 tones per semester). This situation is explained by the decrease in fishing effort (jrom 726 to 411 trips). CPUE analysis for the three main group of species in catches showed the highest levei for
Sphyraena barracudafrom March to May (32.0 to 41.3 kg per trip),for tuna "category", three peak values were observed (35.0 to 54.0 kg per trip), whereas for the black-jack highest CPUE occurred in April (38.9 kg per trip). The size of the great barracuda varied from 42.0 to 105.0 em FL and the mean size was 69.3 ± 8.2 em FL. Most of the samples seemed to be composed of adults with sex-ratio highly favourable to males. The size of Thunnus albacares ranged from 58.0 to 136.0 em FL with a mean length of 83.4 ± 12.5 em FL, a predominance of juveniles being observed. As concerns Caranx lugubris length ranged from 28.5 to 66.5 em FL, with mean size of 44.6 ± 11.5 em FL. Totallengthlfork length and lengthl weíght relationships were established for ali three species with significant correlation coefficients. Fork lengthlgutted weight relationship established for both sexes of Sphyraena barracuda were significantly different.

Published

2018-03-05

Issue

Section

Artigos originais