Broad geographic distribution of roundscale spearfish (Tetrapturus georgii) (Teleostei, Istiophoridae) in the Atlantic revealed by DNA analysis: Implications for white marlin and roundscale spearfish management

Autor(es)

Bernard, Andrea M. ^[1] ; Shivji, Mahmood S. ^[1] ; Domingues, Rodrigo Rodrigues ^{[2, 3]} ; Vieira Hazin, Fabio Hissa ^[4] ; de Amorim, Alberto Ferreira ^[2] ; Domingo, Andres ^[5] ; Arocha, Freddy ^[6] ; Prince, Eric D. ^[7] ; Hoolihan, John P. ^[8] ; Silva Hilsdorf, Alexandre Wagner ^[3]

Afiliação do(s) autor(es)

^[1] Nova SE Univ, Oceanog Ctr, Guy Harvey Res Inst, Dania, FL 33004 - USA

^[2] Agencia Paulista Tecnol Agronegocios, Inst Pesca, BR-11030906 Sao Paulo - Brazil

^[3] Univ Mogi das Cruzes, Nucleo Integrado Biotecnol, BR-08701970 Sao Paulo - Brazil

^[4] Univ Fed Rural Pernambuco, Dept Pesca & Aquicultura, BR-52171032 Recife, PE - Brazil

^[5] Direcc Nacl Recursos Acuat, Lab Recursos Pelag, Montevideo 11200 - Uruguay

^[6] Univ Oriente, Inst Oceanog Venezuela, Cumana 6101 - Venezuela

^[7] Natl Marine Fisheries Serv, SE Fisheries Sci Ctr, Miami, FL 33149 - USA

^[8] Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Cooperat Inst Marine & Atmospher Studies, Miami, FL 33149 - USA

• Tipo de documento: Artigo Científico
• Fonte: Fisheries Research; v. 139, p. 93-97, MAR 2013.
• Citações Web of Science: 7

Resumo

The recent validation of the roundscale spearfish (Tetrapturus georgii) within the western North Atlantic has introduced new complexities in the management of the overfished white marlin (Kajikia albida) in this region due to historical and contemporary misidentification between the two morphologically similar species. Compounding the management challenge for white marlin, which is currently assessed as a single Atlantic-wide stock, is an unclear picture of the extent of the roundscale spearfish's overall Atlantic distribution. By using genetic tools (mitochondrial DNA ND4L-ND4 locus sequences) for species identification, we confirm that the roundscale spearfish has a much broader distribution than previously known, including the central North Atlantic and much of the western South Atlantic to at least 28 degrees 52'S. This much wider Atlantic distribution of the roundscale spearfish sympatric with its morphologically similar congeners, the white marlin and longbill spearfish (Tetrapturus pfluegeri), raises further management complexities: it increases the geographic scale for species misidentification in catch records that form the basis for stock assessments and uncertainty in currently accepted white marlin biological parameters. Additional vigilance in obtaining accurate species identification by improved fishery onboard observer training and incorporation of genetic tools is recommended for informing management of white marlin, longbill spearfish and roundscale spearfish throughout the Atlantic. (C) 2012 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 09/54660-6 - Análise de sequências do DNA mitocondrial para avaliação populacional e identificação molecular das espécies de peixes pelágicos de importância econômica desembarcados na costa de São Paulo
• Beneficiário: Alexandre Wagner Silva Hilsdorf
• Modalidade de apoio: Auxílio à Pesquisa - Regular