Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)

Detalhes bibliográficos
Autor(a) principal: Bonach,Kelly
Data de Publicação: 2011
Outros Autores: Malvasio,Adriana, Matushima,Eliana R., Verdade,Luciano M.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Iheringia. Série Zoologia
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001
Resumo: This study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa (Schweigger, 1812). Despite the relatively small sample size we infer that: a) nests of P. expansa in the central Araguaia river have a lower incubation temperature than nests located further south; however, incubation period is shorter, hatching success rate is lower and clutch-size is larger; b) Podocnemis expansa may present a female-male-female (FMF) pattern of temperature sex-determination (TSD); c) thermosensitive period of sex determination apparently occur at the last third of the incubation period; and, d) future studies should prioritize the relationship between temperature variation (i.e., range and cycle) and embryos development, survivorship and sex determination.
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spelling Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)TSDthermosensitive periodsex determinationreproductive biologyturtlesThis study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa (Schweigger, 1812). Despite the relatively small sample size we infer that: a) nests of P. expansa in the central Araguaia river have a lower incubation temperature than nests located further south; however, incubation period is shorter, hatching success rate is lower and clutch-size is larger; b) Podocnemis expansa may present a female-male-female (FMF) pattern of temperature sex-determination (TSD); c) thermosensitive period of sex determination apparently occur at the last third of the incubation period; and, d) future studies should prioritize the relationship between temperature variation (i.e., range and cycle) and embryos development, survivorship and sex determination.Museu de Ciências Naturais2011-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001Iheringia. Série Zoologia v.101 n.3 2011reponame:Iheringia. Série Zoologiainstname:Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)instacron:FZB/RS10.1590/S0073-47212011000200001info:eu-repo/semantics/openAccessBonach,KellyMalvasio,AdrianaMatushima,Eliana R.Verdade,Luciano M.eng2011-12-13T00:00:00Zoai:scielo:S0073-47212011000200001Revistahttp://www.scielo.br/iszPUBhttps://old.scielo.br/oai/scielo-oai.php||iheringia-zoo@fzb.rs.gov.br1678-47660073-4721opendoar:2011-12-13T00:00Iheringia. Série Zoologia - Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)false
dc.title.none.fl_str_mv Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
title Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
spellingShingle Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
Bonach,Kelly
TSD
thermosensitive period
sex determination
reproductive biology
turtles
title_short Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
title_full Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
title_fullStr Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
title_full_unstemmed Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
title_sort Temperature-sex determination in Podocnemis expansa (Testudines, Podocnemididae)
author Bonach,Kelly
author_facet Bonach,Kelly
Malvasio,Adriana
Matushima,Eliana R.
Verdade,Luciano M.
author_role author
author2 Malvasio,Adriana
Matushima,Eliana R.
Verdade,Luciano M.
author2_role author
author
author
dc.contributor.author.fl_str_mv Bonach,Kelly
Malvasio,Adriana
Matushima,Eliana R.
Verdade,Luciano M.
dc.subject.por.fl_str_mv TSD
thermosensitive period
sex determination
reproductive biology
turtles
topic TSD
thermosensitive period
sex determination
reproductive biology
turtles
description This study has been carried out at the central region of the Araguaia river on the border between the states of Goiás and Mato Grosso in the Brazilian Amazon Basin from September to December 2000. We recorded temperature fluctuation, clutch-size, incubation period and hatching success rate and hatchlings' sex ratio of five nests of Podocnemis expansa (Schweigger, 1812). Despite the relatively small sample size we infer that: a) nests of P. expansa in the central Araguaia river have a lower incubation temperature than nests located further south; however, incubation period is shorter, hatching success rate is lower and clutch-size is larger; b) Podocnemis expansa may present a female-male-female (FMF) pattern of temperature sex-determination (TSD); c) thermosensitive period of sex determination apparently occur at the last third of the incubation period; and, d) future studies should prioritize the relationship between temperature variation (i.e., range and cycle) and embryos development, survivorship and sex determination.
publishDate 2011
dc.date.none.fl_str_mv 2011-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212011000200001
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0073-47212011000200001
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Museu de Ciências Naturais
publisher.none.fl_str_mv Museu de Ciências Naturais
dc.source.none.fl_str_mv Iheringia. Série Zoologia v.101 n.3 2011
reponame:Iheringia. Série Zoologia
instname:Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)
instacron:FZB/RS
instname_str Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)
instacron_str FZB/RS
institution FZB/RS
reponame_str Iheringia. Série Zoologia
collection Iheringia. Série Zoologia
repository.name.fl_str_mv Iheringia. Série Zoologia - Fundação Zoobotânica do Rio Grande do Sul (FZB/RS)
repository.mail.fl_str_mv ||iheringia-zoo@fzb.rs.gov.br
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