Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil
In reptiles, the hatching and emergence of a single clutch may be synchronized or may take place over a number of days, weeks, or even months, depending primarily on the microenvironment of the nest. The present study focused on the patterns of hatching and emergence of Podocnemis unifilis hatchling...
| Autor principal: | Pignati, Marina Teófilo |
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| Outros Autores: | Fernandes, Luana F., Miorando, Priscila Saikoski, Pezzuti, Juarez Carlos Brito |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Chelonian Conservation and Biology
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17854 |
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oai:repositorio:1-17854 |
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oai:repositorio:1-17854 Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil Pignati, Marina Teófilo Fernandes, Luana F. Miorando, Priscila Saikoski Pezzuti, Juarez Carlos Brito In reptiles, the hatching and emergence of a single clutch may be synchronized or may take place over a number of days, weeks, or even months, depending primarily on the microenvironment of the nest. The present study focused on the patterns of hatching and emergence of Podocnemis unifilis hatchlings in an area of várzea floodplain on the lower Amazon River in Santarém, in the Brazilian state of Pará, in 2007 and 2009. Two groups of nests were monitored for hatching and emergence, with the nests in one group being undisturbed during the entire study period. The difference between the oviposition-hatching and oviposition-emergence intervals was determined based on the monitoring of these processes in the monitored clutches. Hatchlings took 1.5 d to leave the eggshell and the eggs at the top of the nest hatched first. The size of the clutch influenced the length of the interval between the first and last hatching. Most hatchlings emerged from a nest during a single night. Hatchlings in late nests and those closer to vegetation took significantly longer to emerge. The hatching-emergence interval was greater in 2007 (11.0 d) than in 2009 (7.3 d). This study contributes to the understanding of hatching and emergence patterns in P. unifilis and the physical and environmental factors that influence them, including the variation between reproductive seasons. © 2013 Chelonian Research Foundation. 2020-06-15T21:49:40Z 2020-06-15T21:49:40Z 2013 Artigo https://repositorio.inpa.gov.br/handle/1/17854 10.2744/CCB-0953.1 en Volume 12, Número 1, Pags. 127-133 Restrito Chelonian Conservation and Biology |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| description |
In reptiles, the hatching and emergence of a single clutch may be synchronized or may take place over a number of days, weeks, or even months, depending primarily on the microenvironment of the nest. The present study focused on the patterns of hatching and emergence of Podocnemis unifilis hatchlings in an area of várzea floodplain on the lower Amazon River in Santarém, in the Brazilian state of Pará, in 2007 and 2009. Two groups of nests were monitored for hatching and emergence, with the nests in one group being undisturbed during the entire study period. The difference between the oviposition-hatching and oviposition-emergence intervals was determined based on the monitoring of these processes in the monitored clutches. Hatchlings took 1.5 d to leave the eggshell and the eggs at the top of the nest hatched first. The size of the clutch influenced the length of the interval between the first and last hatching. Most hatchlings emerged from a nest during a single night. Hatchlings in late nests and those closer to vegetation took significantly longer to emerge. The hatching-emergence interval was greater in 2007 (11.0 d) than in 2009 (7.3 d). This study contributes to the understanding of hatching and emergence patterns in P. unifilis and the physical and environmental factors that influence them, including the variation between reproductive seasons. © 2013 Chelonian Research Foundation. |
| format |
Artigo |
| author |
Pignati, Marina Teófilo |
| spellingShingle |
Pignati, Marina Teófilo Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil |
| author2 |
Fernandes, Luana F. Miorando, Priscila Saikoski Pezzuti, Juarez Carlos Brito |
| author2Str |
Fernandes, Luana F. Miorando, Priscila Saikoski Pezzuti, Juarez Carlos Brito |
| title |
Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil |
| title_short |
Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil |
| title_full |
Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil |
| title_fullStr |
Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil |
| title_full_unstemmed |
Hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (Testudines: Podocnemididae), in the várzea floodplains of the lower amazon river in santarém, Brazil |
| title_sort |
hatching and emergence patterns in the yellow-spotted river turtle, podocnemis unifilis (testudines: podocnemididae), in the várzea floodplains of the lower amazon river in santarém, brazil |
| publisher |
Chelonian Conservation and Biology |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17854 |
| _version_ |
1787142429943529472 |
| score |
11.755432 |