IRCP
Pacific Coral Reef Institute
EPHE

Rynae Greta Lanyon, a Master student at the South Pacific University and having got an IRCP grant, published her second article on the visual abilities of coral reef fish larvae

Lecchini D., Peyrusse K., Lanyon R.G., Lecellier G., 2014.
Importance of visual cues of conspecifics and predators during the habitat
selection of coral reef fish larvae. Comptes rendus Biologies, vol. 337 :
345-351

The study investigated visual recognition of conspecifics and predators by
settlement-stage coral reef fish larvae in a set of three experiments using
a dual-choice aquarium (Moorea Island). Experiments 1 and 2 were conducted
under artificial light conditions. Experiment 3 was conducted under natural
light during new and full moon nights. In experiment 1, five of six species
preferred conspecifics rather than heterospecifics (Acanthurus triostegus,
Chromis viridis, Ostorhinchus angustatus, Stegastes fasciolatus,
Valenciaenna strigata). In experiment 2, three of six species were repulsed
by predators (M. flavolineatus, O. angustatus, V. strigata). In experiment 3
(conducted on one species), A. triostegus was attracted to conspecifics
during bright nights but did not show such behavior during dark nights. Our
study raises the question of trade-off for fish larvae to settle during the
night with high light intensities to favor the visual recognition of
conspecifics and predators, or during darker nights to reduce reef
predation.

See the article on the journal website :
http://www.sciencedirect.com/science/article/pii/S163106911400081X

Biologies - Académie des sciences

Biologies – Académie des sciences

Comments are closed.