Does light explain damselfish Chromis viridis abundances observed over coral colonies?
A single autonomous video camera was used to record the abundances of Chromis viridis over a branching Acropora sp. colony eight times per day over a period of 50 days. The poor explanatory power of global radiation suggests the need for recording the light really available to the fish, especially in the UV range. The increasing number of C. viridis observed with increasing wind along shore and water level may correspond to individuals swimming further from their shelter in order to get closer to the food carried by the water currents.
IRD, UR227, Laboratoire d'Excellence << CORAIL >>, OOB, BP44, 66650 Banyuls-sur-mer, France IRD, UR227, BP 50172, 97492 Ste Clotilde Cedex, Réunion, France. dominique.ponton@ird.fr
D
D
Ponton
N
N
Loiseau
P
P
Chabanet
D000818:Animals; D037421:Anthozoa / Q000502:physiology* / Q000528:radiation effects; D001522:Behavior, Animal / Q000528:radiation effects; D008027:Light; D016014:Linear Models; D010473:Perciformes / Q000502:physiology*; D011156:Population Density; D013550:Swimming / Q000502:physiology