Using head measurements to distinguish white marlin Kajikia albida from roundscale spearfish Tetrapturus georgii in the western North Atlantic

Lawrence R. Beerkircher, Joseph E. Serafy

Research output: Contribution to journalArticle

3 Scopus citations

Abstract

The morphometric characteristics that separate white marlin Kajikia albida (Poey, 1860) from roundscale spearfish Tetrapturus georgii Lowe, 1841 can be difficult for non-experts to distinguish, particularly when the animals are in the water. Using the measurements of the lower jaw tip to the longest branchiostegal ray(LJBR) and the opercle (LJOP ), a discriminant function is presented that will help field observers separate the two species. The function DR-W = LJBR (3.31861) + LJOP (-2.84856) - 6.37198 classified specimens as roundscale spearfish when DR-W was > 0 and as white marlin when DR-W < 0 with a 95% correct classification rate overall. Since only the head of a specimen needs to be closely observed, the method has particular utility for tournament anglers during the hook removal process.

Original languageEnglish (US)
Pages (from-to)147-153
Number of pages7
JournalBulletin of Marine Science
Volume87
Issue number1
DOIs
StatePublished - Jan 1 2011

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

Fingerprint Dive into the research topics of 'Using head measurements to distinguish white marlin Kajikia albida from roundscale spearfish Tetrapturus georgii in the western North Atlantic'. Together they form a unique fingerprint.

  • Cite this