Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.12/1463
Título: Sound production during competitive feeding in the grey gurnard
Autor: Amorim, Maria Clara Pessoa
Stratoudakis, Yorgos
Hawkins, Anthony D.
Data: 2004
Editora: Blackwell Publishing
Citação: Journal of Fish Biology, 65, 182-194
Resumo: The acoustic repertoire of captive grey gurnard Eutrigla gurnardus during competitive feeding consisted of three types of sound: knocks, grunts and growls. Knocks were audible as a single sound, whereas grunts and growls were perceived as longer, pulsed sounds to the human ear. Typically, knocks were composed of 1–2 pulses, grunts of 4–8 pulses and growls >10 pulses. Growls were longer and had shorter pulse periods than grunts. All sound types had peak frequencies of c. 500 Hz. The sequences of behaviours observed during feeding interactions suggest that grey gurnard obtain food both by scramble and contest tactics. Competing fish emitted knocks mainly while grasping a food item and also during other non-agonistic behaviour, suggesting that knock production may reflect a state of feeding arousal but could also serve as a warning of the forager’s presence to nearby competitors. Grunts were mainly emitted during frontal displays, which were the most frequent behavioural act preceding grasps, suggesting that they may play a role in deterring other fish from gaining access to disputed food items.
Peer review: yes
URI: http://hdl.handle.net/10400.12/1463
ISSN: 0022-1112
Aparece nas colecções:UIE-E - Artigos em revistas internacionais

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