Alimentación y relaciones tróficas del pez espada (Xiphias gladius Linnaeus, 1758), frente a Chile centro-norte durante 2005

Translated title of the contribution: Feeding and trophic relationships of the swordfish (Xiphias gladius Linnaeus, 1758), off central and northern Chile during 2005

Sergio Letelier, Roberto Meléndez, Esteban Carreño, Sebastián Lopez, Patricio Barría

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

A total of 126 swordfish (Xiphias gladius) stomach were analyzed. The stomachs were obtained from specimens captured within the 25° to 34°S and 78° to 90°W area, by industrial longline vessels. Only 72 (57.1%) of the total stomach had food items in their stomachs, whit a sex proportion of 32 males (44.4%), 37 females (51.4%) and 3 indeterminate (4.2%). Traditional methods for the stomach contents analysis such as the numeric, frequency of occurrence, gravimetric and index of relative importance (IRI) were used. Cephalopods were the main food items (%IRI>90) followed by the fishes (%IRI<4). The squid (Dosidicus gigas) was the principal food in this study (%IRI = 85.1). No significant differences were found between the feeding of males and females of swordfishes (U = 81; p = 0.4862, p<0.05). A cluster analysis showed higher stomach contents similarity between fall and winter than those from spring, within the size groups the I group was different than others and finally, the feeding from zone 3 were different from others zones.

Translated title of the contributionFeeding and trophic relationships of the swordfish (Xiphias gladius Linnaeus, 1758), off central and northern Chile during 2005
Original languageSpanish
Pages (from-to)107-119
Number of pages13
JournalLatin American Journal of Aquatic Research
Volume37
Issue number1
DOIs
Publication statusPublished - 6 Jul 2009

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science

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