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Titulua: Does social behavior influence the dynamics of aggregations formed by tropical tunas around floating objects? An experimental approach
Egilea: Robert, Marianne; Dagorn, Laurent; Lopez, Jon; Moreno, Gala; Deneubourg, Jean-Louis
Zitazioa: JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY, 2013, 440, 238-243
Laburpena: Tropical 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. (C) 2013 Elsevier B.V. All rights reserved.
Gako-hitzak: Aggregation; Binary choice; FADs; Social behavior; Tuna; PELAGIC FISH AGGREGATIONS; THUNNUS-ALBACARES; SHOAL CHOICE; DEVICES FADS; MOVEMENTS; YELLOWFIN; ORGANIZATION; INDIVIDUALS; PATTERNS; COLONIES
Gordailuaren-data: 2013
Argitalpen: ELSEVIER SCIENCE BV
Dokumentu mota: Article
Hizkuntza: Ingelesa
DOI: 10.1016/j.jembe.2013.01.005
URI: http://dspace.azti.es/handle/24689/557
ISSN: 0022-0981
E-ISSN: 1879-1697
Babeslea: Commission of the European Communities
Alice and David Van Burren Foundation
RTD program of Framework Programme 7, ``Theme 2-Food, Agriculture, Fisheries and Biotechnology,�� through the research project, MADE (Mitigating Adverse Ecological Impacts of Open Ocean Fisheries)
Bildumetan azaltzen da:Artículos científicos



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