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Robert M., Dagorn Laurent, Lopez J., Moreno G., Deneubourg J. L. (2013). Does social behavior influence the dynamics of aggregations formed by tropical tunas around floating objects ? An experimental approach. Journal of Experimental Marine Biology and Ecology, 440, 238-243. ISSN 0022-0981

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Lien direct chez l'éditeur doi:10.1016/j.jembe.2013.01.005

Titre
Does social behavior influence the dynamics of aggregations formed by tropical tunas around floating objects ? An experimental approach
Année de publication2013
Type de documentArticle référencé dans le Web of Science WOS:000316092500033
AuteursRobert M., Dagorn Laurent, Lopez J., Moreno G., Deneubourg J. L.
SourceJournal of Experimental Marine Biology and Ecology, 2013, 440, p. 238-243. ISSN 0022-0981
RésuméTropical tunas associate with objects floating at the surface of the ocean, a behavior widely exploited by fishers. However, the respective roles played by environmental variables and behavioral processes (e.g., social behavior) in the formation of these aggregations remain elusive. To investigate the role of social behavior in the dynamics of such aggregations, we used the binary choice approach. The experimental design comprised two close and identical anchored fish aggregating devices (FADS) equipped with an echo sounder buoy to monitor the aggregated biomass of tuna under each device. Analysis of the results entailed characterizing whether the aggregated biomass is distributed asymmetrically (indicative of social behavior playing a role in the dynamics) or symmetrically between the two close and identical FADs, and comparing the results with theoretical distributions based on different definitions of basic units (individual fish or small schools). The results suggest that social interactions underlie aggregation processes, which represents a major advance in our understanding of these aggregations, a priority for science-based fishery management. While recognizing the logistical and technical constraints, we encourage the development of experimental studies (e.g., in which animals are presented with controlled situations) to enhance our understanding of the behavior of large pelagic fish.
Plan de classementLimnologie biologique / Océanographie biologique [034] ; Ressources halieutiques [040]
LocalisationFonds IRD [F B010060743]
Identifiant IRDfdi:010060743
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010060743

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