In situ orientation of fish larvae can vary among regions

Jeffrey M. Leis, Ulrike E. Siebeck, Amanda C. Hay, Claire B Paris-Limouzy, Olivier Chateau, Laurent Wantiez

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Larval coral-reef fishes have good orientation abilities. Through-water orientation of larvae in some species is location-dependent at meso-scales 90% of larvae swam directionally with similar precision and speeds, and with significant amongindividual orientation. Yet through-water orientation was easterly at CGBR (72 ± 30°) and NCRL (87 ± 20°), and significantly different from NGBR. Over-bottom orientation (i.e. the result of current and larval swimming), measured by GPS at start and end of observing each larva, was weak east-southeasterly at NGBR (116 ± 40°, p = 0.045), not significantly directional at CGBR, and strongly westerly at NCRL (246 ± 28°, p = 0.0006), indicating that dispersal of C. atripectoralis is both current-and behaviour-dependent. This is the first report of location-dependent larval fish orientation at a regional scale. This might be an evolutionary response to regional hydrodynamic conditions to limit downstream dispersal.

Original languageEnglish (US)
Pages (from-to)191-203
Number of pages13
JournalMarine Ecology Progress Series
Volume537
DOIs
StatePublished - Oct 14 2015

Keywords

  • Behaviour
  • Connectivity
  • Dispersal
  • Larva
  • Orientation
  • Pomacentridae
  • Regional differences

ASJC Scopus subject areas

  • Aquatic Science
  • Ecology
  • Ecology, Evolution, Behavior and Systematics

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