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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
agricultural and biological sciences
The heterogeneous spatial and temporal patterns of behavior of small pelagic fish in an array of Fish Aggregating Devices (FADs)
Journal of Experimental Marine Biology and Ecology, Volume 430-431, Year 2012
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Description
Identifying spatial and temporal patterns in fish movements can reveal the driving factors that govern the behavior of fish in their environment. In this study, we characterized the spatial and temporal occupation of 37 acoustically tagged bigeye scads (Selar crumenophthalmus) in an array of shallow Fish Aggregating Devices (FADs) to clarify the mechanism that leads fish to associate with FADs. A comparison of the number of visits and residence times exhibited by the fish at different FADs revealed a strong variability over the array of FADS, with the emergence of a leading FAD that recorded the majority of visits and retained the fish for a longer period of time. We found diel variability in the residence times, with fish associated at daytime and exploring the array of FADs at nighttime. We demonstrated that this diel temporal pattern was amplified in the leading FAD. We identified a 24-hour periodicity for a subset of individuals associated to the leading FAD, thus suggesting that those fish were able to find this FAD after night excursions. The modeling of fish movements based on a Monte Carlo sampling of inter-FAD transitions revealed that the observed spatial heterogeneity in the number of visits could not be explained through simple array-connectivity arguments. Similarly, we demonstrated that the high residence times recorded at the leading FAD were not due to the spatial arrangement of individual fish having different associative characters. We discussed the relationships between these patterns of association with the FADs, the exploration of the FAD array and the possible effects of social interactions and environmental factors. © 2012 Elsevier B.V.
Authors & Co-Authors
Capello, Manuela
France, Marseille
Ird Institut de Recherche Pour le Developpement
Soria, Marc
France, Marseille
Ird Institut de Recherche Pour le Developpement
Cotel, Pascal
France, Marseille
Ird Institut de Recherche Pour le Developpement
Potin, G.
France, Saint-denis
Université de la Réunion
Dagorn, Laurent C.
Seychelles
Umr Eme
Fréon, Pierre
France, Marseille
Ird Institut de Recherche Pour le Developpement
Statistics
Citations: 19
Authors: 6
Affiliations: 3
Identifiers
Doi:
10.1016/j.jembe.2012.06.022
ISSN:
00220981
Research Areas
Genetics And Genomics