DBIO - Departamento Biologia
URI Permanente desta comunidadehttps://repositorio.ufrn.br/handle/1/4
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Navegando DBIO - Departamento Biologia por Assunto "Associative learning"
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Artigo Associative learning in the multichamber tank: a new learning paradigm for zebrafish(Elsevier, 2016-06-21) Fernandes, Yohaan M.; Rampersad, Mindy; Luchiari, Ana Carolina; Gerlai, RobertThe zebrafish has been gaining prominence in the field of behavioural brain research as this species offers a good balance between system complexity and practical simplicity. While the number of studies examining the behaviour of zebrafish has exponentially increased over the past decade, the need is still substantial for paradigms capable of assessing cognitive and mnemonic characteristics of this species. Here we describe and utilize a novel visual discrimination task with which we evaluated acquisition of CS (colour)-US (sight of conspecifics) association in adult zebrafish. We report significant acquisition of CS-US association indicated by the increased time the fish spent in and the increased frequency of visits of the target chamber during a probe trial in the absence of reward. Given the simplicity of the apparatus and procedure, we conclude that the new task may be employed to assay learning and memory in adult zebrafish in an efficient mannerArtigo Dusky damselfish Stegastes fuscus relational learning: evidences from associative and spatial tasks(The Fisheries Society of the British Isles, 2015) Silveira, Mayara Moura da; Oliveira, Jessica Janine de; Luchiari, Ana CarolinaThis study investigated the ability of the dusky damselfish Stegastes fuscus to associate conditioned and unconditioned stimuli (single CS–US) and to find a specific place in a clueless ambiece (spatial learning). After tested for colour preference and showing no specific colour attractively, the fish were trained to associate a colour cue with a stimulus fish (conspecific). Fish were then challenged to locate the exact place where the stimulus fish was presented. Stegastes fuscus spent most time close to the zone where stimulus was presented, even without obvious marks for orientation. The results confirm that S. fuscus show single CS–US learning and suggest the fish ability for spatial orientation. Stegastes fuscus appears to use multiple senses (sight and lateral line) for cues association and recall, and appear to perform relational learning similar to mammals. These data suggest the importance of cognitive skill for reef fishes that may have contributed to their establishment and evolutionary success in such complex environment