Vertical habitat utilization by large pelagic animals: A quantitative framework and numerical method for use with pop-up satellite tag data

Jiangang Luo, Eric D. Prince, C. Phillip Goodyear, Brian E. Luckhurst, Joseph E. Serafy

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

A quantitative framework and numerical methodology were developed to characterize vertical habitat utilization by large pelagic animals and to estimate the probability of their capture by certain types of fishing gear. Described are the steps involved to build 'vertical habitat envelopes' from data recovered from an electronically tagged blue marlin (Makaira nigricans) as well as from a longline fishing gear experiment employing temperature-depth recording devices. The resulting vertical habitat envelopes, which integrate depth and temperature preferences of tagged fish, are conducive for comparative studies of animal behavior and for calculation (and visualization) of degrees of overlap - be it among individuals, species or fishing gear. Results of a computer simulation evaluation indicated our numerical procedure to be reliable for estimating vertical habitat use from data summaries. The approach appears to have utility for examining pelagic longline fishing impacts on both target and non-target species and could point to ways of reducing bycatch via modification of fishing strategy or gear configuration.

Original languageEnglish (US)
Pages (from-to)208-229
Number of pages22
JournalFisheries Oceanography
Volume15
Issue number3
DOIs
StatePublished - May 1 2006

Keywords

  • Blue marlin
  • Numerical estimation
  • Satellite tags
  • Vertical habitat

ASJC Scopus subject areas

  • Aquatic Science
  • Oceanography

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