Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia?
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.physbeh.2017.10.016 http://hdl.handle.net/11449/163555 |
Resumo: | Body coloration has a fundamental role in animal communication by signaling sex, age, reproductive behavior, aggression, etc. Nile-tilapia exhibits dominance hierarchy and the dominants are paler than subordinates. During social interactions in these animals, these color changes occur rapidly, and normally the subordinates become dark. In teleosteans, from the great number of hormones and neurotransmitters involved in color changes, melanocyte hormone stimulates (alpha-MSH) and melanin concentrates hormone (MCH) are the most remarkable. The aim of this project was to investigate the role of MCH in the establishment of hierarchical dominance of the Nile-tilapia. We analyzed the effect of background coloration in the dominance hierarchy. It was then compared to the melanophore sensibility of dominants and subordinates' fishes to MCH; finally, it was checked if the social rank affects the number of these pigment cells in dominants and subordinated fishes. Fishes which have a social hierarchy established and adjusted individually to the background exhibits paler body coloration when a visual contact was possible, independently of previous social rank and background color. Probably, even recognizing each other, fishes could be defending their new territory. Melanophores of the subordinate fishes were more sensible to MCH than dominants. It suggests that dominants fishes, which are paler than subordinates, could be under a chronic effect of MCH, which could be due a desensitization of melanophores to this hormone. The opposite effect seems to be occurring on subordinate fishes. It was not observed a significant change in the number of melanophores when the fishes were exposed to a prolonged period of agonistic interaction. It is possible that the exposure time for this interaction might not have been sufficient to have any change in the number of these cells of dominants and subordinate fishes. |
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Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia?MCHMelanotropinsMelanophoresAgonistic interactionSocial hierarchyNile tilapiaOreochromis niloticusBody coloration has a fundamental role in animal communication by signaling sex, age, reproductive behavior, aggression, etc. Nile-tilapia exhibits dominance hierarchy and the dominants are paler than subordinates. During social interactions in these animals, these color changes occur rapidly, and normally the subordinates become dark. In teleosteans, from the great number of hormones and neurotransmitters involved in color changes, melanocyte hormone stimulates (alpha-MSH) and melanin concentrates hormone (MCH) are the most remarkable. The aim of this project was to investigate the role of MCH in the establishment of hierarchical dominance of the Nile-tilapia. We analyzed the effect of background coloration in the dominance hierarchy. It was then compared to the melanophore sensibility of dominants and subordinates' fishes to MCH; finally, it was checked if the social rank affects the number of these pigment cells in dominants and subordinated fishes. Fishes which have a social hierarchy established and adjusted individually to the background exhibits paler body coloration when a visual contact was possible, independently of previous social rank and background color. Probably, even recognizing each other, fishes could be defending their new territory. Melanophores of the subordinate fishes were more sensible to MCH than dominants. It suggests that dominants fishes, which are paler than subordinates, could be under a chronic effect of MCH, which could be due a desensitization of melanophores to this hormone. The opposite effect seems to be occurring on subordinate fishes. It was not observed a significant change in the number of melanophores when the fishes were exposed to a prolonged period of agonistic interaction. It is possible that the exposure time for this interaction might not have been sufficient to have any change in the number of these cells of dominants and subordinate fishes.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Sao Paulo, Inst Biociencias, Dept Fisiol, Rua Matao,Travessa 14,101, BR-05508090 Sao Paulo, SP, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Fisiol, Postal Box 510, BR-8618000 Botucatu, SP, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Fisiol, Postal Box 510, BR-8618000 Botucatu, SP, BrazilElsevier B.V.Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Ramanzini, Guilherme CorreaVolpato, Gilson Luiz [UNESP]Visconti, Maria Aparecida2018-11-26T17:42:30Z2018-11-26T17:42:30Z2018-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article33-38application/pdfhttp://dx.doi.org/10.1016/j.physbeh.2017.10.016Physiology & Behavior. Oxford: Pergamon-elsevier Science Ltd, v. 183, p. 33-38, 2018.0031-9384http://hdl.handle.net/11449/16355510.1016/j.physbeh.2017.10.016WOS:000417009800005WOS000417009800005.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysiology & Behavior1,088info:eu-repo/semantics/openAccess2023-10-13T06:03:37Zoai:repositorio.unesp.br:11449/163555Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-10-13T06:03:37Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
title |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
spellingShingle |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? Ramanzini, Guilherme Correa MCH Melanotropins Melanophores Agonistic interaction Social hierarchy Nile tilapia Oreochromis niloticus |
title_short |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
title_full |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
title_fullStr |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
title_full_unstemmed |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
title_sort |
Does MCH play a role on establishment or maintenance of social hierarchy in Nile tilapia? |
author |
Ramanzini, Guilherme Correa |
author_facet |
Ramanzini, Guilherme Correa Volpato, Gilson Luiz [UNESP] Visconti, Maria Aparecida |
author_role |
author |
author2 |
Volpato, Gilson Luiz [UNESP] Visconti, Maria Aparecida |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Ramanzini, Guilherme Correa Volpato, Gilson Luiz [UNESP] Visconti, Maria Aparecida |
dc.subject.por.fl_str_mv |
MCH Melanotropins Melanophores Agonistic interaction Social hierarchy Nile tilapia Oreochromis niloticus |
topic |
MCH Melanotropins Melanophores Agonistic interaction Social hierarchy Nile tilapia Oreochromis niloticus |
description |
Body coloration has a fundamental role in animal communication by signaling sex, age, reproductive behavior, aggression, etc. Nile-tilapia exhibits dominance hierarchy and the dominants are paler than subordinates. During social interactions in these animals, these color changes occur rapidly, and normally the subordinates become dark. In teleosteans, from the great number of hormones and neurotransmitters involved in color changes, melanocyte hormone stimulates (alpha-MSH) and melanin concentrates hormone (MCH) are the most remarkable. The aim of this project was to investigate the role of MCH in the establishment of hierarchical dominance of the Nile-tilapia. We analyzed the effect of background coloration in the dominance hierarchy. It was then compared to the melanophore sensibility of dominants and subordinates' fishes to MCH; finally, it was checked if the social rank affects the number of these pigment cells in dominants and subordinated fishes. Fishes which have a social hierarchy established and adjusted individually to the background exhibits paler body coloration when a visual contact was possible, independently of previous social rank and background color. Probably, even recognizing each other, fishes could be defending their new territory. Melanophores of the subordinate fishes were more sensible to MCH than dominants. It suggests that dominants fishes, which are paler than subordinates, could be under a chronic effect of MCH, which could be due a desensitization of melanophores to this hormone. The opposite effect seems to be occurring on subordinate fishes. It was not observed a significant change in the number of melanophores when the fishes were exposed to a prolonged period of agonistic interaction. It is possible that the exposure time for this interaction might not have been sufficient to have any change in the number of these cells of dominants and subordinate fishes. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-26T17:42:30Z 2018-11-26T17:42:30Z 2018-01-01 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1016/j.physbeh.2017.10.016 Physiology & Behavior. Oxford: Pergamon-elsevier Science Ltd, v. 183, p. 33-38, 2018. 0031-9384 http://hdl.handle.net/11449/163555 10.1016/j.physbeh.2017.10.016 WOS:000417009800005 WOS000417009800005.pdf |
url |
http://dx.doi.org/10.1016/j.physbeh.2017.10.016 http://hdl.handle.net/11449/163555 |
identifier_str_mv |
Physiology & Behavior. Oxford: Pergamon-elsevier Science Ltd, v. 183, p. 33-38, 2018. 0031-9384 10.1016/j.physbeh.2017.10.016 WOS:000417009800005 WOS000417009800005.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physiology & Behavior 1,088 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
33-38 application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier B.V. |
publisher.none.fl_str_mv |
Elsevier B.V. |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1803649397609725952 |