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Article
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
Fisheries Research
  • Andrea M. Bernard, Nova Southeastern University
  • Mahmood S. Shivji, Nova Southeastern University
  • Rodrigo Rodrigues Domingues, Agencia Paulista de Tecnologia dos Agronegocios - Brazil, Universidade de Mogi das Cruzes - Brazil
  • Fabio Hissa Vieira Hazin, Universidade Federal Rural de Pernambuco - Brazil
  • Alberto Ferreira de Amorim, Agencia Paulista de Tecnologia dos Agronegocios - Brazil
  • Andres Domingo, Direccion Nacional de Recursos Acuaticos - Uruguay
  • Freddy Arocha, Universidad de Oriente - Venezuela
  • Eric D. Prince, Southeast Fisheries Science Center
  • John P. Hoolihan, University of Miami
  • Alexandre Wagner Silva Hilsdorf, Universidade de Mogi das Cruzes - Brazil
Document Type
Article
Publication Date
12-6-2012
Keywords
  • Fisheries management; Species identification,
  • Kajikia albida,
  • Mitochondrial DNA,
  • Billfish
Peer Reviewed
1
Abstract
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°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.
Comments

Copyright © 2012 Elsevier B.V. Published by Elsevier B.V. All rights reserved.

Additional Comments
This work was supported by funding from NOAA/NMFS SEFSC, a National Science and Engineering Research Council of Canada Graduate Fellowship (AMB), The Guy Harvey Ocean Foundation, The Brazilian Ministry of Fisheries and Aquaculture, Universidade de Mogi das Cruzes, Unidade de Biotecnologia, FAPESP (proc. 2009/54660-6), and Agencia Paulista de Tecnologia dos Agronegócios, Instituto de Pesca.
ResearcherID
G-4080-2013
DOI
10.1016/j.fishres.2012.10.009
Citation Information
Andrea M. Bernard, Mahmood S. Shivji, Rodrigo Rodrigues Domingues, Fabio Hissa Vieira Hazin, et al.. "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" Fisheries Research Vol. 139 (2012) p. 93 - 97 ISSN: 0165-7836
Available at: http://works.bepress.com/mahmood-shivji/14/