Eye color as an indicator of social rank in the fish Nile tilapia
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0100-879X2003001200007 http://hdl.handle.net/11449/17774 |
Resumo: | We investigated the association of eye color with the dominant-subordinate relationship in the fish Nile tilapia, Oreochromis niloticus. Eye color pattern was also examined in relation to the intensity of attacks. We paired 20 size-matched fish (intruder: 73.69 ± 11.49 g; resident: 75.42 ± 8.83 g) and evaluated eye color and fights. These fish were isolated in individual aquaria for 10 days and then their eye color was measured 5 min before pairing (basal values). Twenty minutes after pairing, eye color and fights were quantified for 10 min. Clear establishment of social hierarchy was observed in 7 of 10 pairs of fish. Number of attacks ranged from 1 to 168 among pairs. The quartile was calculated for these data and the pairs were then divided into two classes: low-attack (1 to 111 attacks - 2 lower quartiles) or high-attack (112 to 168 attacks - 2 higher quartiles). Dominance decreased the eye-darkening patterns of the fish after pairing, while subordinance increased darkening compared to dominance. Subordinate fish in low-attack confrontations presented a darker eye compared to dominant fish and to the basal condition. We also observed a paler eye pattern in dominants that shared low-attack interactions after pairing compared to the subordinates and within the group. However, we found no differences in the darkening pattern between dominants and subordinates from the high-attack groups. We conclude that eye color is associated with social rank in this species. Moreover, the association between eye color and social rank in the low-attack pairs may function to reduce aggression. |
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spelling |
Eye color as an indicator of social rank in the fish Nile tilapiaAggressionEye colorSocial hierarchySocial stressFishOreochromis niloticusWe investigated the association of eye color with the dominant-subordinate relationship in the fish Nile tilapia, Oreochromis niloticus. Eye color pattern was also examined in relation to the intensity of attacks. We paired 20 size-matched fish (intruder: 73.69 ± 11.49 g; resident: 75.42 ± 8.83 g) and evaluated eye color and fights. These fish were isolated in individual aquaria for 10 days and then their eye color was measured 5 min before pairing (basal values). Twenty minutes after pairing, eye color and fights were quantified for 10 min. Clear establishment of social hierarchy was observed in 7 of 10 pairs of fish. Number of attacks ranged from 1 to 168 among pairs. The quartile was calculated for these data and the pairs were then divided into two classes: low-attack (1 to 111 attacks - 2 lower quartiles) or high-attack (112 to 168 attacks - 2 higher quartiles). Dominance decreased the eye-darkening patterns of the fish after pairing, while subordinance increased darkening compared to dominance. Subordinate fish in low-attack confrontations presented a darker eye compared to dominant fish and to the basal condition. We also observed a paler eye pattern in dominants that shared low-attack interactions after pairing compared to the subordinates and within the group. However, we found no differences in the darkening pattern between dominants and subordinates from the high-attack groups. We conclude that eye color is associated with social rank in this species. Moreover, the association between eye color and social rank in the low-attack pairs may function to reduce aggression.Universidade Estadual Paulista Instituto de Biociências Departamento de FisiologiaUniversidade Estadual Paulista Instituto de Biociências Departamento de FisiologiaAssociação Brasileira de Divulgação Científica (ABRADIC)Universidade Estadual Paulista (Unesp)Volpato, Gilson Luiz [UNESP]Luchiari, A.C. [UNESP]Duarte, C.R.A. [UNESP]Barreto, R.E. [UNESP]Ramanzini, G.C. [UNESP]2014-05-20T13:49:49Z2014-05-20T13:49:49Z2003-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1659-1663application/pdfhttp://dx.doi.org/10.1590/S0100-879X2003001200007Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 36, n. 12, p. 1659-1663, 2003.0100-879Xhttp://hdl.handle.net/11449/1777410.1590/S0100-879X2003001200007S0100-879X2003001200007S0100-879X2003001200007.pdf3363114201357959SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBrazilian Journal of Medical and Biological Research1.492info:eu-repo/semantics/openAccess2023-11-05T06:06:30Zoai:repositorio.unesp.br:11449/17774Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:56:28.122750Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Eye color as an indicator of social rank in the fish Nile tilapia |
title |
Eye color as an indicator of social rank in the fish Nile tilapia |
spellingShingle |
Eye color as an indicator of social rank in the fish Nile tilapia Volpato, Gilson Luiz [UNESP] Aggression Eye color Social hierarchy Social stress Fish Oreochromis niloticus |
title_short |
Eye color as an indicator of social rank in the fish Nile tilapia |
title_full |
Eye color as an indicator of social rank in the fish Nile tilapia |
title_fullStr |
Eye color as an indicator of social rank in the fish Nile tilapia |
title_full_unstemmed |
Eye color as an indicator of social rank in the fish Nile tilapia |
title_sort |
Eye color as an indicator of social rank in the fish Nile tilapia |
author |
Volpato, Gilson Luiz [UNESP] |
author_facet |
Volpato, Gilson Luiz [UNESP] Luchiari, A.C. [UNESP] Duarte, C.R.A. [UNESP] Barreto, R.E. [UNESP] Ramanzini, G.C. [UNESP] |
author_role |
author |
author2 |
Luchiari, A.C. [UNESP] Duarte, C.R.A. [UNESP] Barreto, R.E. [UNESP] Ramanzini, G.C. [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Volpato, Gilson Luiz [UNESP] Luchiari, A.C. [UNESP] Duarte, C.R.A. [UNESP] Barreto, R.E. [UNESP] Ramanzini, G.C. [UNESP] |
dc.subject.por.fl_str_mv |
Aggression Eye color Social hierarchy Social stress Fish Oreochromis niloticus |
topic |
Aggression Eye color Social hierarchy Social stress Fish Oreochromis niloticus |
description |
We investigated the association of eye color with the dominant-subordinate relationship in the fish Nile tilapia, Oreochromis niloticus. Eye color pattern was also examined in relation to the intensity of attacks. We paired 20 size-matched fish (intruder: 73.69 ± 11.49 g; resident: 75.42 ± 8.83 g) and evaluated eye color and fights. These fish were isolated in individual aquaria for 10 days and then their eye color was measured 5 min before pairing (basal values). Twenty minutes after pairing, eye color and fights were quantified for 10 min. Clear establishment of social hierarchy was observed in 7 of 10 pairs of fish. Number of attacks ranged from 1 to 168 among pairs. The quartile was calculated for these data and the pairs were then divided into two classes: low-attack (1 to 111 attacks - 2 lower quartiles) or high-attack (112 to 168 attacks - 2 higher quartiles). Dominance decreased the eye-darkening patterns of the fish after pairing, while subordinance increased darkening compared to dominance. Subordinate fish in low-attack confrontations presented a darker eye compared to dominant fish and to the basal condition. We also observed a paler eye pattern in dominants that shared low-attack interactions after pairing compared to the subordinates and within the group. However, we found no differences in the darkening pattern between dominants and subordinates from the high-attack groups. We conclude that eye color is associated with social rank in this species. Moreover, the association between eye color and social rank in the low-attack pairs may function to reduce aggression. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003-12-01 2014-05-20T13:49:49Z 2014-05-20T13:49:49Z |
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/10.1590/S0100-879X2003001200007 Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 36, n. 12, p. 1659-1663, 2003. 0100-879X http://hdl.handle.net/11449/17774 10.1590/S0100-879X2003001200007 S0100-879X2003001200007 S0100-879X2003001200007.pdf 3363114201357959 |
url |
http://dx.doi.org/10.1590/S0100-879X2003001200007 http://hdl.handle.net/11449/17774 |
identifier_str_mv |
Brazilian Journal of Medical and Biological Research. Associação Brasileira de Divulgação Científica, v. 36, n. 12, p. 1659-1663, 2003. 0100-879X 10.1590/S0100-879X2003001200007 S0100-879X2003001200007 S0100-879X2003001200007.pdf 3363114201357959 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Brazilian Journal of Medical and Biological Research 1.492 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1659-1663 application/pdf |
dc.publisher.none.fl_str_mv |
Associação Brasileira de Divulgação Científica (ABRADIC) |
publisher.none.fl_str_mv |
Associação Brasileira de Divulgação Científica (ABRADIC) |
dc.source.none.fl_str_mv |
SciELO 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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1808128724162314240 |