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Muscular hypertrophy of urinary bladders in dominant tilapia facilitates the control of aggression through urinary signals

2012-10Journal article Restricted access
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dc.contributor.authorKeller-Costa, Tina
dc.contributor.authorLopes, O. S.
dc.contributor.authorAlmeida, O. G.
dc.contributor.authorHubbard, Peter
dc.contributor.authorIacovella, A.
dc.contributor.authorLima, M.
dc.contributor.authorBarata, E. N.
dc.contributor.authorCanario, Adelino V. M.
dc.date.accessioned2014-05-07T15:16:32Z
dc.date.available2014-05-07T15:16:32Z
dc.date.issued2012-10
dc.date.updated2014-05-07T11:05:19Z
dc.description.abstractThe urination pattern of the Mozambique tilapia (Oreochromis mossambicus) depends on social context, and the olfactory potency of urine released depends on social rank (males) and reproductive status (females). This strongly suggests that urine mediates chemical communication in this species. The current study tested, firstly, whether urine production rate depends on sex or social status and, secondly, whether differences in urination pattern and volume of urine stored are associated with variation in the morphology of the urinary bladder. Finally, the effect of urination during aggressive male–male interactions was assessed. Urine production in catheterized fish depended neither on sex nor social status (males). Nevertheless, males had larger kidneys than females. Dominant males had heavier urinary bladders than subordinate males or females, mainly due to enlarged muscle fibres, thicker urothelium and a thicker smooth muscle layer. In male pairs wherein urination was prevented by temporary constriction of the genital papillae, social interaction escalated to aggression (mouth-to-mouth fighting) more rapidly and frequently than control pairs. This was accompanied by elevated plasma testosterone and 11-ketotestosterone levels. In control encounters, the male that initiated the aggressive behaviour was usually the winner of the subsequent fight; this did not happen when the males could not urinate. These results suggest that the larger, more muscular bladder of dominant males is an adaptation, facilitating higher urination frequency, post-renal modulation and storage of larger urine volumes for longer. It is likely that urinary pheromones modulate aggression in male–male encounters by providing information on the social rank and/or motivation of the emitter; males are unlikely to invest in costly highly aggressive fights if they judge their opponent to be more dominant. Thus, a morphological explanation for the differing urination patterns of dominant and subordinant males, and females, has been provided, and a possible function for this behaviour in male–male interactions is suggested.por
dc.identifier.citationKeller-Costa, T.; Lopes, O. S.; Almeida, O. G.; Hubbard, P. C.; Iacovella, A.; Lima, M.; Barata, E. N.; Canario, A. V. M. Muscular hypertrophy of urinary bladders in dominant tilapia facilitates the control of aggression through urinary signals (vol 149, pg 953, 2012), Behaviour, 150, 3-4, 445-446, 2013.por
dc.identifier.doihttp://dx.doi.org/10.1163/1568539X-00003023
dc.identifier.issn0005-7959
dc.identifier.otherAUT: ACA00258
dc.identifier.urihttp://hdl.handle.net/10400.1/3800
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherBrill Academic Publisherspor
dc.relation.publisherversionhttp://web.a.ebscohost.com/ehost/detail?vid=3&sid=d8dcad1c-2cde-4ff5-86a5-7244ff88cbfc%40sessionmgr4001&hid=4201&bdata=JnNpdGU9ZWhvc3QtbGl2ZSZzY29wZT1zaXRl#db=a9h&AN=84392052por
dc.subjectMusclepor
dc.subjectAggressionpor
dc.subjectSocial dominancepor
dc.subjectChemical communicationpor
dc.subjectUrine signalspor
dc.subjectUrinary bladderpor
dc.subjectOreochromis mossambicuspor
dc.titleMuscular hypertrophy of urinary bladders in dominant tilapia facilitates the control of aggression through urinary signalspor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage975por
oaire.citation.issue9por
oaire.citation.startPage953por
oaire.citation.titleBehaviourpor
oaire.citation.volume149por
person.familyNameKeller-Costa
person.familyNameHubbard
person.familyNameBarata
person.familyNameCanario
person.givenNameTina
person.givenNamePeter
person.givenNameEduardo Nuno
person.givenNameAdelino
person.identifier143624
person.identifier.ciencia-id9319-A7D5-5335
person.identifier.ciencia-id951F-BA4B-A21F
person.identifier.ciencia-id1F1E-D3B3-F804
person.identifier.orcid0000-0003-3702-9192
person.identifier.orcid0000-0002-3007-4647
person.identifier.orcid0000-0001-9714-5967
person.identifier.orcid0000-0002-6244-6468
person.identifier.ridB-2823-2008
person.identifier.ridB-2902-2010
person.identifier.ridC-7942-2009
person.identifier.scopus-author-id7005928467
person.identifier.scopus-author-id6602073256
person.identifier.scopus-author-id56568523700
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublicatione5a30366-3797-42ff-944b-f29ba4136cbd
relation.isAuthorOfPublicationf599b3ac-806b-4f65-9eb6-f70e68bcb142
relation.isAuthorOfPublicationa2bb6982-e4c8-4ea3-b160-bc3464cd960f
relation.isAuthorOfPublication5f6e51ee-9113-469e-8b9e-f30f2d452521
relation.isAuthorOfPublication.latestForDiscoveryf599b3ac-806b-4f65-9eb6-f70e68bcb142

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