Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis
Autor(a) principal: | |
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Data de Publicação: | 2006 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.12/1301 |
Resumo: | In the Azorean rock-pool blenny (Parablennius parvicornis) reproductively active males display alternative morphotypes, which differ in the expression of secondary sexual characters (SSC). Males expressing SSC, theMCmorphotype, have high androgen levels and compete for crevices that will be visited by females to spawn.MCmales holding nests court females and care for the eggs. Males with low expression of SSC, the MK morphotype, have low levels of androgens and reproduce by stealing fertilizations from the MC males. Based on the hypothesis that androgens are immunosuppressive, we expected these morphotypes to differ in immunocompetence. To test this hypothesis, we conducted a field study in which we collected repeated blood samples to monitor leukocyte populations (blood smears), and to measure the primary antibody response of males that were experimentally challenged with a foreign non-pathogenic antigen (sheep red blood cells). Circulating levels of 11-ketotestosterone and testosterone were higher in MC males than in MK males. Neither granulocyte nor thrombocyte counts did covariate with androgens or male tactic. In contrast, lymphocyte counts and humoral antibody response were negatively correlated with body size, and as expected, both were lower in MC than in MK males. Interestingly, in MC males androgen levels decreased after immunization, and this was less in nest-holder males than in MC males that were floating around in the pools. Within each morphotype we found no relationship between androgens and immunocompetence. The latter result is not supportive for androgen regulated immunosuppression in MC males. A possible alternative is enhancement of immunity in MK males. These males had relatively high levels of injuries in comparison withMCmales. High immunity might be a consequence of high infection rate because of such injuries. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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7160 |
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Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornisAlternative reproductive tacticsLeukocytes11-ketotestosteroneTestosteroneSheep red blood cellsHaemagglutinationIn the Azorean rock-pool blenny (Parablennius parvicornis) reproductively active males display alternative morphotypes, which differ in the expression of secondary sexual characters (SSC). Males expressing SSC, theMCmorphotype, have high androgen levels and compete for crevices that will be visited by females to spawn.MCmales holding nests court females and care for the eggs. Males with low expression of SSC, the MK morphotype, have low levels of androgens and reproduce by stealing fertilizations from the MC males. Based on the hypothesis that androgens are immunosuppressive, we expected these morphotypes to differ in immunocompetence. To test this hypothesis, we conducted a field study in which we collected repeated blood samples to monitor leukocyte populations (blood smears), and to measure the primary antibody response of males that were experimentally challenged with a foreign non-pathogenic antigen (sheep red blood cells). Circulating levels of 11-ketotestosterone and testosterone were higher in MC males than in MK males. Neither granulocyte nor thrombocyte counts did covariate with androgens or male tactic. In contrast, lymphocyte counts and humoral antibody response were negatively correlated with body size, and as expected, both were lower in MC than in MK males. Interestingly, in MC males androgen levels decreased after immunization, and this was less in nest-holder males than in MC males that were floating around in the pools. Within each morphotype we found no relationship between androgens and immunocompetence. The latter result is not supportive for androgen regulated immunosuppression in MC males. A possible alternative is enhancement of immunity in MK males. These males had relatively high levels of injuries in comparison withMCmales. High immunity might be a consequence of high infection rate because of such injuries.The Royal SocietyRepositório do ISPARos, Albert F. H.Bouton, NielsSantos, Ricardo SerrãoOliveira, Rui Filipe2012-03-28T19:08:46Z2006-01-01T00:00:00Z2006-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.12/1301engProceedings of the Royal Society B: Biological Sciences, 273, 901-9091471-2954info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-09-05T16:37:23Zoai:repositorio.ispa.pt:10400.12/1301Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:19:24.980031Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
title |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
spellingShingle |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis Ros, Albert F. H. Alternative reproductive tactics Leukocytes 11-ketotestosterone Testosterone Sheep red blood cells Haemagglutination |
title_short |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
title_full |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
title_fullStr |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
title_full_unstemmed |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
title_sort |
Alternative male reproductive tactics and the immunocompetence handicap in the azorean rock-pool blenny, Parablennius parvicornis |
author |
Ros, Albert F. H. |
author_facet |
Ros, Albert F. H. Bouton, Niels Santos, Ricardo Serrão Oliveira, Rui Filipe |
author_role |
author |
author2 |
Bouton, Niels Santos, Ricardo Serrão Oliveira, Rui Filipe |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Repositório do ISPA |
dc.contributor.author.fl_str_mv |
Ros, Albert F. H. Bouton, Niels Santos, Ricardo Serrão Oliveira, Rui Filipe |
dc.subject.por.fl_str_mv |
Alternative reproductive tactics Leukocytes 11-ketotestosterone Testosterone Sheep red blood cells Haemagglutination |
topic |
Alternative reproductive tactics Leukocytes 11-ketotestosterone Testosterone Sheep red blood cells Haemagglutination |
description |
In the Azorean rock-pool blenny (Parablennius parvicornis) reproductively active males display alternative morphotypes, which differ in the expression of secondary sexual characters (SSC). Males expressing SSC, theMCmorphotype, have high androgen levels and compete for crevices that will be visited by females to spawn.MCmales holding nests court females and care for the eggs. Males with low expression of SSC, the MK morphotype, have low levels of androgens and reproduce by stealing fertilizations from the MC males. Based on the hypothesis that androgens are immunosuppressive, we expected these morphotypes to differ in immunocompetence. To test this hypothesis, we conducted a field study in which we collected repeated blood samples to monitor leukocyte populations (blood smears), and to measure the primary antibody response of males that were experimentally challenged with a foreign non-pathogenic antigen (sheep red blood cells). Circulating levels of 11-ketotestosterone and testosterone were higher in MC males than in MK males. Neither granulocyte nor thrombocyte counts did covariate with androgens or male tactic. In contrast, lymphocyte counts and humoral antibody response were negatively correlated with body size, and as expected, both were lower in MC than in MK males. Interestingly, in MC males androgen levels decreased after immunization, and this was less in nest-holder males than in MC males that were floating around in the pools. Within each morphotype we found no relationship between androgens and immunocompetence. The latter result is not supportive for androgen regulated immunosuppression in MC males. A possible alternative is enhancement of immunity in MK males. These males had relatively high levels of injuries in comparison withMCmales. High immunity might be a consequence of high infection rate because of such injuries. |
publishDate |
2006 |
dc.date.none.fl_str_mv |
2006-01-01T00:00:00Z 2006-01-01T00:00:00Z 2012-03-28T19:08:46Z |
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://hdl.handle.net/10400.12/1301 |
url |
http://hdl.handle.net/10400.12/1301 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Proceedings of the Royal Society B: Biological Sciences, 273, 901-909 1471-2954 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
The Royal Society |
publisher.none.fl_str_mv |
The Royal Society |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799130053805604864 |