Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)

Detalhes bibliográficos
Autor(a) principal: Navarro, Rodrigo Diana
Data de Publicação: 2021
Outros Autores: Alves, Ana Carolina Tavora Lima
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Acta Scientiarum Biological Sciences
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50591
Resumo: The present study aimed to study the reproduction of the Amazon turtle (Podocnemis expansa) through the evaluation of the reproductive parameters of adult females. This study was carried out in the Crixás-Açu River, municipality of Mundo Novo, state of Goiás, Brazil. In September, the biometrics of 20 females were evaluated during the spawning period. Their nests were marked for subsequent evaluation of hatchlings, measuring the distances of each nest to the river and vegetation. The second stage consisted of the evaluation of hatchlings and characterization of nests after egg hatching. The data were tested using the Pearson Correlation to measure the degree of linear correlation between the variables analyzed, such as the parameters of females, hatchlings, nests, and eggs. Nest depth was positively correlated with the number of eggshells found. We also found a correlation between the number of eggsshells and the distance of nests to the vegetation. Although moderate, this result indicates that as the distance to the vegetation increases, the number of eggshells found in nests decreases. The spawning site for Amazon turtle breeding is crucial to determine a higher number of eggs hatching and better development of hatchlings. However, the literature is still very scarce regarding the choice of spawning grounds and the influence that vegetation may have on the development of freshwater turtle hatchlings in Brazil.
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spelling Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)amazon turtle; reproductive parameters; biometrics; spawning period.The present study aimed to study the reproduction of the Amazon turtle (Podocnemis expansa) through the evaluation of the reproductive parameters of adult females. This study was carried out in the Crixás-Açu River, municipality of Mundo Novo, state of Goiás, Brazil. In September, the biometrics of 20 females were evaluated during the spawning period. Their nests were marked for subsequent evaluation of hatchlings, measuring the distances of each nest to the river and vegetation. The second stage consisted of the evaluation of hatchlings and characterization of nests after egg hatching. The data were tested using the Pearson Correlation to measure the degree of linear correlation between the variables analyzed, such as the parameters of females, hatchlings, nests, and eggs. Nest depth was positively correlated with the number of eggshells found. We also found a correlation between the number of eggsshells and the distance of nests to the vegetation. Although moderate, this result indicates that as the distance to the vegetation increases, the number of eggshells found in nests decreases. The spawning site for Amazon turtle breeding is crucial to determine a higher number of eggs hatching and better development of hatchlings. However, the literature is still very scarce regarding the choice of spawning grounds and the influence that vegetation may have on the development of freshwater turtle hatchlings in Brazil.El presente estudio tuvo como objetivo estudiar la reproducción de la tortuga amazónica (Podocnemis expansa) mediante la evaluación de los parámetros reproductivos de las hembras adultas. Este trabajo constaba de dos partes, ambas en el río Crixás-Açu, en el municipio de Mundo Novo-GO. En la primera parte, en septiembre, se evaluó la biometría de 20 hembras durante el período de desove, se marcaron sus nidos para una evaluación adicional de los recién nacidos y se demarcaron las distancias de cada nido de río y vegetación. La segunda etapa consistió en la evaluación del recién nacido y la caracterización de los nidos después de la eclosión. Los datos se probaron utilizando la correlación de Pearson para medir el grado de correlación lineal entre las variables analizadas, como los parámetros de hembras, polluelos, nidos y huevos. Se encontró que la profundidad de los nidos se correlacionó, pero positivamente, con el número de conchas que se encuentran en ellos. También se encontró una correlación entre el número de corteza y la distancia de la vegetación. Aunque es una correlación moderada, indica que a medida que aumenta la distancia desde la vegetación, el número de cáscaras de huevo encontradas disminuye en los nidos. Para la reproducción de la tortuga amazónica, el lugar donde se produce el desove es de tal importancia que hay un mayor número de eclosiones y un mejor desarrollo de las crías. Sin embargo, la literatura aún es muy escasa sobre la elección de los sitios de desove y la influencia que la vegetación puede tener en el desarrollo de las crías de tortugas de agua dulce en Brasil.Universidade Estadual De Maringá2021-04-19info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5059110.4025/actascibiolsci.v43i1.50591Acta Scientiarum. Biological Sciences; Vol 43 (2021): Publicação contínua; e50591Acta Scientiarum. Biological Sciences; v. 43 (2021): Publicação contínua; e505911807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50591/751375151966Copyright (c) 2021 Acta Scientiarum. Biological Scienceshttp://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccessNavarro, Rodrigo DianaAlves, Ana Carolina Tavora Lima 2022-02-17T21:58:55Zoai:periodicos.uem.br/ojs:article/50591Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-02-17T21:58:55Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
title Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
spellingShingle Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
Navarro, Rodrigo Diana
amazon turtle; reproductive parameters; biometrics; spawning period.
title_short Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
title_full Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
title_fullStr Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
title_full_unstemmed Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
title_sort Neonatal biometry and characterization of Amazonian Turtle nests (Podocnemis expansa)
author Navarro, Rodrigo Diana
author_facet Navarro, Rodrigo Diana
Alves, Ana Carolina Tavora Lima
author_role author
author2 Alves, Ana Carolina Tavora Lima
author2_role author
dc.contributor.author.fl_str_mv Navarro, Rodrigo Diana
Alves, Ana Carolina Tavora Lima
dc.subject.por.fl_str_mv amazon turtle; reproductive parameters; biometrics; spawning period.
topic amazon turtle; reproductive parameters; biometrics; spawning period.
description The present study aimed to study the reproduction of the Amazon turtle (Podocnemis expansa) through the evaluation of the reproductive parameters of adult females. This study was carried out in the Crixás-Açu River, municipality of Mundo Novo, state of Goiás, Brazil. In September, the biometrics of 20 females were evaluated during the spawning period. Their nests were marked for subsequent evaluation of hatchlings, measuring the distances of each nest to the river and vegetation. The second stage consisted of the evaluation of hatchlings and characterization of nests after egg hatching. The data were tested using the Pearson Correlation to measure the degree of linear correlation between the variables analyzed, such as the parameters of females, hatchlings, nests, and eggs. Nest depth was positively correlated with the number of eggshells found. We also found a correlation between the number of eggsshells and the distance of nests to the vegetation. Although moderate, this result indicates that as the distance to the vegetation increases, the number of eggshells found in nests decreases. The spawning site for Amazon turtle breeding is crucial to determine a higher number of eggs hatching and better development of hatchlings. However, the literature is still very scarce regarding the choice of spawning grounds and the influence that vegetation may have on the development of freshwater turtle hatchlings in Brazil.
publishDate 2021
dc.date.none.fl_str_mv 2021-04-19
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50591
10.4025/actascibiolsci.v43i1.50591
url http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50591
identifier_str_mv 10.4025/actascibiolsci.v43i1.50591
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/50591/751375151966
dc.rights.driver.fl_str_mv Copyright (c) 2021 Acta Scientiarum. Biological Sciences
http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright (c) 2021 Acta Scientiarum. Biological Sciences
http://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Biological Sciences; Vol 43 (2021): Publicação contínua; e50591
Acta Scientiarum. Biological Sciences; v. 43 (2021): Publicação contínua; e50591
1807-863X
1679-9283
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collection Acta Scientiarum Biological Sciences
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