Development of agonistic behaviour and vocalization in croaking gouramis
Identifieur interne : 000604 ( Main/Exploration ); précédent : 000603; suivant : 000605Development of agonistic behaviour and vocalization in croaking gouramis
Auteurs : S. M. Henglmüller [Autriche] ; F. Ladichm [Autriche]Source :
- Journal of Fish Biology [ 0022-1112 ] ; 1999-02.
English descriptors
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Abstract
The development of agonistic behaviour and vocalization in the croaking gourami Trichopsis vittata was studied from hatching to sexual maturity (4 months of age). Initial interactions started when fry were 11 days old and consisted of approach and flight in a feeding context. More complex threat patterns appeared during dyadic encounters as fish grew older. Lateral display (spreading of median fins in a lateral position) first occurred during the third week, circling shortly afterwards and pectoral fin beating when fish were 7 weeks old. Rapid pectoral fin beating was first accompanied by sound emission at 8 weeks. Initially, croaking sounds were built up mainly of a series of single pulses, each one produced by one pectoral fin. Later, single pulses gave way to double pulses. Furthermore, pulse period and number of pulses increased, while the dominant frequency of croaks decreased significantly with age. After vocalization was established, frontal display, mouth biting and retreat behaviour occurred at the age of 10 weeks. Initially, young exhibited vertical bars which gave way to dots and horizontal bars at 8 weeks when fish started to vocalize. The order of appearance of behavioural patterns during ontogeny corresponds to the order of appearance in fights between adults. This is the first study demonstrating that the ontogenetic development of social signalling comprises characteristic changes in behaviour, vocalization and coloration in a teleost fish.
Url:
DOI: 10.1111/j.1095-8649.1999.tb00837.x
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Initial interactions started when fry were 11 days old and consisted of approach and flight in a feeding context. More complex threat patterns appeared during dyadic encounters as fish grew older. Lateral display (spreading of median fins in a lateral position) first occurred during the third week, circling shortly afterwards and pectoral fin beating when fish were 7 weeks old. Rapid pectoral fin beating was first accompanied by sound emission at 8 weeks. Initially, croaking sounds were built up mainly of a series of single pulses, each one produced by one pectoral fin. Later, single pulses gave way to double pulses. Furthermore, pulse period and number of pulses increased, while the dominant frequency of croaks decreased significantly with age. After vocalization was established, frontal display, mouth biting and retreat behaviour occurred at the age of 10 weeks. Initially, young exhibited vertical bars which gave way to dots and horizontal bars at 8 weeks when fish started to vocalize. The order of appearance of behavioural patterns during ontogeny corresponds to the order of appearance in fights between adults. This is the first study demonstrating that the ontogenetic development of social signalling comprises characteristic changes in behaviour, vocalization and coloration in a teleost fish.</div></front></TEI><affiliations><list><country><li>Autriche</li></country></list><tree><country name="Autriche"><noRegion><name sortKey="Henglmuller, S M" sort="Henglmuller, S M" uniqKey="Henglmuller S" first="S. M." last="Henglmüller">S. M. Henglmüller</name></noRegion><name sortKey="Ladichm, F" sort="Ladichm, F" uniqKey="Ladichm F" first="F." last="Ladichm">F. Ladichm</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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