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A multi-component pheromone in the urine of dominant male tilapia (Oreochromis mossambicus) reduces aggression in rivals

2016-02Journal article Restricted access
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dc.contributor.authorKeller-Costa, Tina
dc.contributor.authorSaraiva, JoĂŁo L.
dc.contributor.authorHubbard, Peter
dc.contributor.authorBarata, Eduardo Nuno
dc.contributor.authorCanĂĄrio, Adelino V. M.
dc.date.accessioned2017-04-07T15:57:11Z
dc.date.available2017-04-07T15:57:11Z
dc.date.issued2016-02
dc.description.abstractMales often use scent to communicate their dominance, and to mediate aggressive and breeding behaviors. In teleost fish, however, the chemical composition of male pheromones is poorly understood. Male Mozambique tilapia, Oreochromis mossambicus, use urine that signals social status and primes females to spawn. The urinary sex pheromone directed at females consists of 5 beta-pregnane-3 alpha,17 alpha,20 beta-triol 3-glucuronate and its 20 alpha-epimer. The concentration of these is positively correlated with male social rank. This study tested whether dominant male urine reduces aggression in receiver males, and whether the pregnanetriol 3-glucuronates also reduce male-male aggression. Males were allowed to fight their mirror image when exposed to either: i) water control or a chemical stimulus; ii) dominant male urine (DMU); iii) C18-solid phase (C18-SPE) DMU eluate; iv) C18-SPE DMU eluate plus filtrate; v) the two pregnanetriol 3-glucuronates (P3Gs); or vi) P3Gs plus DMU filtrate. Control males mounted an increasingly aggressive fight against their image over time. However, DMU significantly reduced this aggressive response. The two urinary P3Gs did not replicate the effect of whole DMU. Neither did the C18-SPE DMU eluate, containing the P3Gs, alone, nor the C18-SPE DMU filtrate to which the two P3Gs were added. Only exposure to reconstituted DMU (C18-SPE eluate plus filtrate) restored the aggression-reducing effect of whole DMU. Olfactory activity was present in the eluate and the polar filtrate in electro-olfactogram studies. We conclude that P3Gs alone have no reducing effect on aggression and that the urinary signal driving off male competition is likely to be a multi-component pheromone, with components present in both the polar and non-polar urine fractions.
dc.identifier.doi10.1007/s10886-016-0668-0
dc.identifier.issn0098-0331
dc.identifier.otherAUT; ACA00258;
dc.identifier.urihttp://hdl.handle.net/10400.1/9634
dc.language.isoeng
dc.peerreviewedyes
dc.relation.isbasedonWOS:000373015800010
dc.titleA multi-component pheromone in the urine of dominant male tilapia (Oreochromis mossambicus) reduces aggression in rivals
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage182
oaire.citation.issue2
oaire.citation.startPage173
oaire.citation.titleJournal of Chemical Ecology
oaire.citation.volume42
person.familyNameKeller-Costa
person.familyNameSaraiva
person.familyNameHubbard
person.familyNameBarata
person.familyNameCanario
person.givenNameTina
person.givenNameJoĂŁo
person.givenNamePeter
person.givenNameEduardo Nuno
person.givenNameAdelino
person.identifier292979
person.identifier143624
person.identifier.ciencia-id9319-A7D5-5335
person.identifier.ciencia-id7A15-0E73-E652
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person.identifier.orcid0000-0003-3702-9192
person.identifier.orcid0000-0002-8891-8881
person.identifier.orcid0000-0002-3007-4647
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person.identifier.orcid0000-0002-6244-6468
person.identifier.ridM-6167-2013
person.identifier.ridB-2823-2008
person.identifier.ridB-2902-2010
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id26325116400
person.identifier.scopus-author-id7005928467
person.identifier.scopus-author-id6602073256
person.identifier.scopus-author-id56568523700
rcaap.rightsrestrictedAccess
rcaap.typearticle
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