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Evaluation of self-feeders as a tool to study diet preferences in groups of Atlantic cod (Gadus morhua) ArchiMer
Millot, Sandie; Nilsson, Jonatan; Fosseidengen, Jan Erik; Begout, Marie-laure; Kristiansen, Tore.
Among other applications, self-feeding has been used to study food preferences in fish allowing them to choose between feeders with different food content. Preference tests assume that (i) trigger actuations are motivated by appetite, (ii) fish can learn which feeder contains which food and discriminate between feeders solely on the basis of their content, and (iii) in groups of fish, the triggering preferences is representative for the individuals of the group. We studied individual triggering behaviour in four groups of 14 Atlantic cod (length of 34 +/- 2 cm, weight of 424 +/- 102 g, mean +/- SE, water temperature comprised between 7-8 degrees C) that were first given the choice between two self-feeders with identical content (Period 1 of 14 days) and...
Tipo: Text Palavras-chave: Learning; Self-feeding; Social status; Behaviour; Coping abilities; Gadidae.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00116/22754/20605.pdf
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Innovative behaviour in fish: Atlantic cod can learn to use an external tag to manipulate a self-feeder ArchiMer
Millot, Sandie; Nilsson, Jonatan; Fosseidengen, Jan Erik; Begout, Marie-laure; Ferno, Anders; Braithwaite, Victoria A.; Kristiansen, Tore S..
This study describes how three individual fish, Atlantic cod (Gadus morhua L.), developed a novel behaviour and learnt to use a dorsally attached external tag to activate a self-feeder. This behaviour was repeated up to several hundred times, and over time these fish fine-tuned the behaviour and made a series of goal-directed coordinated movements needed to attach the feeder’s pull string to the tag and stretch the string until the feeder was activated. These observations demonstrate a capacity in cod to develop a novel behaviour utilizing an attached tag as a tool to achieve a goal. This may be seen as one of the very few observed examples of innovation and tool use in fish.
Tipo: Text Palavras-chave: Innovation; Learning; Cognitive ability; Tool use; Atlantic cod; Food acquisition.
Ano: 2014 URL: http://archimer.ifremer.fr/doc/00171/28217/26513.pdf
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