Repository logo
 
Publication

Castration affects reproductive but not aggressive behavior in a cichlid fish

dc.contributor.authorAlmeida, Olinda
dc.contributor.authorCanário, Adelino V. M.
dc.contributor.authorOliveira, Rui Filipe
dc.date.accessioned2014-11-22T11:00:06Z
dc.date.available2014-11-22T11:00:06Z
dc.date.issued2014
dc.description.abstractGonads are the main source of sex steroids, which have been implicated in the regulation of sexually differentiated behavior, such as reproductive and aggressive displays. In the Mozambique tilapia (Oreochromis mossambicus) territorial males have higher androgen levels than non-territorials, express reproductive behavior and use a urine-borne pheromone to signal their social status towards conspecifics. Here we investigated the effects of gonadectomy on the circulating levels of androgens and cortisol, and on the expression of aggressive and reproductive behavior (nest building, courtship behavior, and nuptial coloration). Males were either castrated, urine bladder damaged, or sham-operated and visually exposed to a group of females during 8 consecutive days and subsequently to a male on day 9. The urine bladder damaged treatment was included in the experimental design because a full castration procedure in this species causes quite often damage to the urine bladder. Gonadectomy lowers dramatically the circulating levels of androgens measured at 4 and 8 days post-castration and abolishes the expression of nest building, courtship behavior and nuptial coloration, but has no effect on the expression of aggressive behavior. These results confirm the gonads as the main source of androgens in this species and show that androgens are necessary for the expression of reproductive behaviors. However, the expression of aggressive behavior seems to be decoupled from gonadal steroids, namely androgens, suggesting the action of independent central mechanisms.por
dc.description.sponsorshipFoundation for Science and Technology; European Commission FEDER Programpor
dc.identifier.citationGeneral and Comparative Endocrinology, 207, 34–40por
dc.identifier.doi10.1016/j.ygcen.2014.03.018
dc.identifier.issn0016-6480
dc.identifier.urihttp://hdl.handle.net/10400.12/3215
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relationMAR-LVT-Lisboa-331por
dc.relationNEUROENDOCRINOLOGY OF REPRODUCTIVE BEHAVIOUR IN THE AFRICAN CICHLID OREOCHROMIS MOSSAMBICUS: REGULATORY MECHANISMS AND SOCIAL MODULATION OF REPRODUCTION
dc.subjectTilapiapor
dc.subjectCastrationpor
dc.subjectGonadal hormonespor
dc.subjectAndrogenspor
dc.subjectAggressionpor
dc.subjectCourtshippor
dc.titleCastration affects reproductive but not aggressive behavior in a cichlid fishpor
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNEUROENDOCRINOLOGY OF REPRODUCTIVE BEHAVIOUR IN THE AFRICAN CICHLID OREOCHROMIS MOSSAMBICUS: REGULATORY MECHANISMS AND SOCIAL MODULATION OF REPRODUCTION
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FPSI%2F71811%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PTDC%2FMAR%2F72117%2F2006/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F37187%2F2007/PT
oaire.citation.conferencePlaceSan Diegopor
oaire.citation.endPage40por
oaire.citation.startPage34por
oaire.citation.titleGeneral and Comparative Endocrinologypor
oaire.citation.volume207por
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isProjectOfPublication472a9a90-c314-4462-8e3a-474f6d438206
relation.isProjectOfPublication19faa489-66e2-4bb2-b29f-32bbf2394773
relation.isProjectOfPublicationf4c2036b-9917-4164-838d-33cdf6442869
relation.isProjectOfPublication.latestForDiscovery19faa489-66e2-4bb2-b29f-32bbf2394773

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
GCE_207_34-40.pdf
Size:
1.02 MB
Format:
Adobe Portable Document Format
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.61 KB
Format:
Item-specific license agreed upon to submission
Description: