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A methodological framework for characterizing fish swimming and escapement behaviors in trawls ArchiMer
Robert, Marianne; Cortay, Aurore; Morfin, Marie; Simon, Julien; Morandeau, Fabien; Deneubourg, Jean Louis; Vincent, Benoit.
Knowledge about fish behavior is crucial to be able to influence the capture process and catch species composition. The rapid expansion of the use of underwater cameras has facilitated unprecedented opportunities for studying the behavior of species interacting with fishing gears in their natural environment. This technological advance would greatly benefit from the parallel development of dedicated methodologies accounting for right-censored observations and variable observation periods between individuals related to instrumental, environmental and behavioral events. In this paper we proposed a methodological framework, based on a parametric Weibull mixture model, to describe the process of escapement attempts through time, test effects of covariates and...
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Ano: 2020 URL: https://archimer.ifremer.fr/doc/00663/77553/79457.pdf
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The aggregation of tuna around floating objects: What could be the underlying social mechanisms? ArchiMer
Robert, Marianne; Dagorn, Laurent; Deneubourg, Jean Louis.
Several empirical and theoretical studies have shown how the exploitation of food sources, the choice of resting sites or other types of collective decision-making in heterogeneous environments are facilitated and modulated by social interactions between conspecifics. It is well known that many pelagic fishes live in schools and that this form of gregarious behavior provides advantages in terms of food intake and predator avoidance efficiency. However, the influence of social behavior in the formation of aggregations by tuna under floating objects (FOBs) is poorly understood. In this work, we investigated the collective patterns generated by different theoretical models, which either include or exclude social interactions between conspecifics, in the...
Tipo: Text Palavras-chave: Models Of Aggregation; Monte Carlo multi-agents simulations; Fish Aggregating Devices; Social Behavior.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00195/30638/29091.pdf
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