In situ orientation of fish larvae can vary among regions

Leis, Jeffrey M., Siebeck, Ulrike E., Hay, Amanda C., Paris, Claire B., Chateau, Olivier and Wantiez, Laurent (2015) In situ orientation of fish larvae can vary among regions. Marine Ecology Progress Series, 537 191-203. doi:10.3354/meps11446

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Author Leis, Jeffrey M.
Siebeck, Ulrike E.
Hay, Amanda C.
Paris, Claire B.
Chateau, Olivier
Wantiez, Laurent
Title In situ orientation of fish larvae can vary among regions
Journal name Marine Ecology Progress Series   Check publisher's open access policy
ISSN 0171-8630
1616-1599
Publication date 2015-10-14
Year available 2015
Sub-type Article (original research)
DOI 10.3354/meps11446
Open Access Status File (Publisher version)
Volume 537
Start page 191
End page 203
Total pages 13
Place of publication Oldendorf, Germany
Publisher Inter-Research
Collection year 2016
Language eng
Formatted abstract
Larval coral-reef fishes have good orientation abilities. Through-water orientation of larvae in some species is location-dependent at meso-scales <10s of km, whereas other species have location-independent orientation at meso-scales. In situ observation of the damselfish Chromis atripectoralis showed that settlement-stage larvae swam in a southerly direction (mean = 175 ± 11°) at 100 to 1000 m from shore, both east and west of Lizard Island, northern Great Barrier Reef (NGBR), in 10 datasets from 1998 to 2008. Wind direction did not directly influence through-water swimming direction at NGBR. During 2014, in situ diver observation tested if orientation of C. atripectoralis differed regionally in the central Great Barrier Reef (CGBR), 620 km south of NGBR, and in the New Caledonia reef lagoon (NCRL), 1950 km east of CGBR. In all 3 regions, >90% of larvae swam directionally with similar precision and speeds, and with significant among-individual 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.
Keyword Connectivity
Dispersal
Larva
Orientation
Behaviour
Pomacentridae
Regional differences
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Biomedical Sciences Publications
 
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