Alimentación del tiburón marrajo Isurus oxyrinchus Rafinesque, 1810 (Lamniformes: Lamnidae) en el Pacífico suroriental

Translated title of the contribution: Feeding of the shortfin mako shark Isurus oxyrinchus Rafinesque, 1810 (Lamniformes: Lamnidae) in the southeastern Pacific

Sebastián Lopez, Roberto Meléndez, Patricio Barría

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

In order to examine the feeding of mako shark Isurus oxyrinchus, the stomach content of 205 specimens, captured between 21° and 35°S and 78° and 118° W off Chile, during 2005 and 2006 were analyzed. The 47.8% of the sharks had food in their stomachs. The numeric, frequency and weight methods and the index of relative importance (IIR) were used to describe their diet. The diet was compared between sexes and spatio-temporal variations of the diet were also determined. The diet of the mako shark consisted of 17 prey items. Teleost fishes were the most important prey item (86.9% IIR), followed by cephalopods (12.3% IIR). Other preys were in low frequency (<1% IIR) and they were represented by elasmobranch fishes, marine birds and marine mammals. No differences in diet were found between sexes of shortfin mako, however, it was detected variation between seasons and fishing zones. According to its diet the mako shark is considered a generalist species.

Translated title of the contributionFeeding of the shortfin mako shark Isurus oxyrinchus Rafinesque, 1810 (Lamniformes: Lamnidae) in the southeastern Pacific
Original languageSpanish
Pages (from-to)439-451
Number of pages13
JournalRevista de Biologia Marina y Oceanografia
Volume44
Issue number2
Publication statusPublished - 22 Sep 2009

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

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