Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes
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.ygcen.2018.02.006 http://hdl.handle.net/11449/164020 |
Resumo: | Despite Psitaciformes (parrots) being the third largest nonpasserine order (398 species), it currently ranks second in number of threatened species (28%) according to the Internatinal Union for Conservation of Nature (IUCN) criteria. Since most of the literature concerning reproductive endocrinology in avian species derives from domestic and song birds, it is puzzling that advances in reproductive science for the Psitaciformes order lags far behind, in spite of the growing threats against them. In order to expand our knowledge of Neotropical parrots (Psittacidae), we examined annual changes in urofecal sex steroid metabolites of Blue-fronted amazon pairs (Amazona aestiva) exhibiting successful (nestlings) and unsuccessful breeding (infertile or no eggs). Urofecal samples were collected over a year from eight breeding pairs housed under the same environmental and management conditions. Fecal androgen and progestagen concentrations were determined in males and females, respectively, by enzyme immunoassays previously validated for this species. All eggs were registered between late winter and mid-spring, and egg laying intervals varied between females (range: 1-8 days; average 3.60 +/- 0.51 days). Similar profiles of urofecal progestagens were observed in reproductively successful females and females producing infertile eggs, with progestagen peaks preceding egg laying events (1.77 +/- 0.50 days). In contrast, non-laying females had no rises in progestagens during the year. Successful and unsuccessful males did not displayed distinct annual patterns of androgen production, and apart from the peaks during the breeding season, more than half of the individuals intriguingly presented significant increases from late summer to early autumn, a period without reproductive activity. Finally, we noticed that samples with progestagen levels exceeding 40 ng/g had very high probability (>97.5%) to be from females in pre-laying or laying phases, suggesting a feasible application of this characteristic to noninvasively discriminate the reproductive status in amazon females with an accuracy and sensitivity of 94.55% and 58.13%, respectively. Our findings confirmed that urofecal progestagens and androgens are good indicators of the gonadal condition in Blue-fronted amazons, but there is still much to be done for their extensive use in artificial insemination or selection of the most suitable breeding birds for the season. (C) 2018 Elsevier Inc. All rights reserved. |
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Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomesBirdsPsitracinesNoninvasive endocrinologySexual activityAndrogensProgestagensDespite Psitaciformes (parrots) being the third largest nonpasserine order (398 species), it currently ranks second in number of threatened species (28%) according to the Internatinal Union for Conservation of Nature (IUCN) criteria. Since most of the literature concerning reproductive endocrinology in avian species derives from domestic and song birds, it is puzzling that advances in reproductive science for the Psitaciformes order lags far behind, in spite of the growing threats against them. In order to expand our knowledge of Neotropical parrots (Psittacidae), we examined annual changes in urofecal sex steroid metabolites of Blue-fronted amazon pairs (Amazona aestiva) exhibiting successful (nestlings) and unsuccessful breeding (infertile or no eggs). Urofecal samples were collected over a year from eight breeding pairs housed under the same environmental and management conditions. Fecal androgen and progestagen concentrations were determined in males and females, respectively, by enzyme immunoassays previously validated for this species. All eggs were registered between late winter and mid-spring, and egg laying intervals varied between females (range: 1-8 days; average 3.60 +/- 0.51 days). Similar profiles of urofecal progestagens were observed in reproductively successful females and females producing infertile eggs, with progestagen peaks preceding egg laying events (1.77 +/- 0.50 days). In contrast, non-laying females had no rises in progestagens during the year. Successful and unsuccessful males did not displayed distinct annual patterns of androgen production, and apart from the peaks during the breeding season, more than half of the individuals intriguingly presented significant increases from late summer to early autumn, a period without reproductive activity. Finally, we noticed that samples with progestagen levels exceeding 40 ng/g had very high probability (>97.5%) to be from females in pre-laying or laying phases, suggesting a feasible application of this characteristic to noninvasively discriminate the reproductive status in amazon females with an accuracy and sensitivity of 94.55% and 58.13%, respectively. Our findings confirmed that urofecal progestagens and androgens are good indicators of the gonadal condition in Blue-fronted amazons, but there is still much to be done for their extensive use in artificial insemination or selection of the most suitable breeding birds for the season. (C) 2018 Elsevier Inc. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Univ Sao Paulo, Fac Med Vet & Zootecnia, Dept Reprod Anim, GEMA, BR-05508900 Sao Paulo, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Programa Posgrad Med Vet, BR-14884900 Jaboticabal, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, Nucleo Pesquisa & Conservacao Cervideos NUPECCE, BR-14884900 Jaboticabal, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Programa Posgrad Med Vet, BR-14884900 Jaboticabal, SP, BrazilUniv Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, Nucleo Pesquisa & Conservacao Cervideos NUPECCE, BR-14884900 Jaboticabal, SP, BrazilFAPESP: 10/06500-7Elsevier B.V.Universidade de São Paulo (USP)Universidade Estadual Paulista (Unesp)Pereira, Ricardo J. G.Christofoletti, Mauricio D. [UNESP]Blank, Marcel H.Duarte, Jose Mauricio B. [UNESP]2018-11-26T17:48:48Z2018-11-26T17:48:48Z2018-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1-8application/pdfhttp://dx.doi.org/10.1016/j.ygcen.2018.02.006General And Comparative Endocrinology. San Diego: Academic Press Inc Elsevier Science, v. 260, p. 1-8, 2018.0016-6480http://hdl.handle.net/11449/16402010.1016/j.ygcen.2018.02.006WOS:000428360500001WOS000428360500001.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengGeneral And Comparative Endocrinology1,101info:eu-repo/semantics/openAccess2024-06-07T18:42:47Zoai:repositorio.unesp.br:11449/164020Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T19:45:40.131044Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
title |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
spellingShingle |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes Pereira, Ricardo J. G. Birds Psitracines Noninvasive endocrinology Sexual activity Androgens Progestagens |
title_short |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
title_full |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
title_fullStr |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
title_full_unstemmed |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
title_sort |
Urofecal steroid profiles of captive Blue-fronted parrots (Amazona aestiva) with different reproductive outcomes |
author |
Pereira, Ricardo J. G. |
author_facet |
Pereira, Ricardo J. G. Christofoletti, Mauricio D. [UNESP] Blank, Marcel H. Duarte, Jose Mauricio B. [UNESP] |
author_role |
author |
author2 |
Christofoletti, Mauricio D. [UNESP] Blank, Marcel H. Duarte, Jose Mauricio B. [UNESP] |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Pereira, Ricardo J. G. Christofoletti, Mauricio D. [UNESP] Blank, Marcel H. Duarte, Jose Mauricio B. [UNESP] |
dc.subject.por.fl_str_mv |
Birds Psitracines Noninvasive endocrinology Sexual activity Androgens Progestagens |
topic |
Birds Psitracines Noninvasive endocrinology Sexual activity Androgens Progestagens |
description |
Despite Psitaciformes (parrots) being the third largest nonpasserine order (398 species), it currently ranks second in number of threatened species (28%) according to the Internatinal Union for Conservation of Nature (IUCN) criteria. Since most of the literature concerning reproductive endocrinology in avian species derives from domestic and song birds, it is puzzling that advances in reproductive science for the Psitaciformes order lags far behind, in spite of the growing threats against them. In order to expand our knowledge of Neotropical parrots (Psittacidae), we examined annual changes in urofecal sex steroid metabolites of Blue-fronted amazon pairs (Amazona aestiva) exhibiting successful (nestlings) and unsuccessful breeding (infertile or no eggs). Urofecal samples were collected over a year from eight breeding pairs housed under the same environmental and management conditions. Fecal androgen and progestagen concentrations were determined in males and females, respectively, by enzyme immunoassays previously validated for this species. All eggs were registered between late winter and mid-spring, and egg laying intervals varied between females (range: 1-8 days; average 3.60 +/- 0.51 days). Similar profiles of urofecal progestagens were observed in reproductively successful females and females producing infertile eggs, with progestagen peaks preceding egg laying events (1.77 +/- 0.50 days). In contrast, non-laying females had no rises in progestagens during the year. Successful and unsuccessful males did not displayed distinct annual patterns of androgen production, and apart from the peaks during the breeding season, more than half of the individuals intriguingly presented significant increases from late summer to early autumn, a period without reproductive activity. Finally, we noticed that samples with progestagen levels exceeding 40 ng/g had very high probability (>97.5%) to be from females in pre-laying or laying phases, suggesting a feasible application of this characteristic to noninvasively discriminate the reproductive status in amazon females with an accuracy and sensitivity of 94.55% and 58.13%, respectively. Our findings confirmed that urofecal progestagens and androgens are good indicators of the gonadal condition in Blue-fronted amazons, but there is still much to be done for their extensive use in artificial insemination or selection of the most suitable breeding birds for the season. (C) 2018 Elsevier Inc. All rights reserved. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-26T17:48:48Z 2018-11-26T17:48:48Z 2018-05-01 |
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.ygcen.2018.02.006 General And Comparative Endocrinology. San Diego: Academic Press Inc Elsevier Science, v. 260, p. 1-8, 2018. 0016-6480 http://hdl.handle.net/11449/164020 10.1016/j.ygcen.2018.02.006 WOS:000428360500001 WOS000428360500001.pdf |
url |
http://dx.doi.org/10.1016/j.ygcen.2018.02.006 http://hdl.handle.net/11449/164020 |
identifier_str_mv |
General And Comparative Endocrinology. San Diego: Academic Press Inc Elsevier Science, v. 260, p. 1-8, 2018. 0016-6480 10.1016/j.ygcen.2018.02.006 WOS:000428360500001 WOS000428360500001.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
General And Comparative Endocrinology 1,101 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1-8 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 |
|
_version_ |
1808129114998046720 |