Manejo de ninhos da tartaruga-da-Amazônia (&gt;i&lt;Podocnemis expansa&gt;/i&lt;)

Bonach, Kelly

doi:10.11606/d.11.2019.tde-20191218-180418

Cited by 1 publication

(2 citation statements)

References 23 publications

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“…Therefore, based on the present results, it would be possible for bigger females to produce a female biased sex ratio, since Podocnemis expansa has a TSD I pattern (Valenzuela et al, 1997) as described by Ewert et al (1994). However, recent results suggest that the P. expansa TSD pattern might be type II (FMF, as described by Ewert et al, 1994), in which females are produced at low and high temperature, whereas males are produced at intermediate temperature (Bonach, 2003).…”

Section: Discussionmentioning

confidence: 51%

“…Nesting habitat selection in reptiles has effects on incubation success (Larriera and Piña, 2000), and on hatchling phenotype (Shine and Harlow, 1996). This is extremely important in species with temperature dependent-sex determination (TSD), such as Podocnemis expansa (Valenzuela et al, 1997;Bonach, 2003;Morjan, 2003) because incubation temperature would depend on nest characteristics (Vasconcelos, 2000).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Allometry of reproduction of Podocnemis expansa in Southern Amazon basin

Bonach¹,

Piña²,

Verdade

2006

Amphib Reptilia

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Podocnemis expansa (giant Amazon freshwater turtle) is the biggest freshwater turtle of South America. Like in other reptiles, the nest of P. expansa is a hole in the sand deep enough to avoid predators and extremes of temperature and humidity. However, nesting habitat selection in reptiles has effects on incubation success and on hatchlings. Female body-size is also related to the size and shape (i.e., form) of the nest, which might in theory be related to the female reproductive success. In this study we established allometric relationships between female body size and nest form. Fieldwork was carried out in nesting beaches of Araguaia and Crixás-Açu Rivers in Southern Amazon basin, Brazil, from September to December 2000. As a result, we can establish that nest form does not affect reproductive success in the species, but female body length is positively related to egg mass and clutch size.

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