Movement and habitat use of female subadults of Podocnemis expansa (Testudines: Podocnemididae) in northern Brazil
DOI:
https://doi.org/10.11606/issn.2316-9079.v24i1p25-44Keywords:
Amazonian turtles, Home range size, Radio-tracking, Social behavior, Water levelAbstract
The Giant South American River Turtle, Podocnemis expansa, is recognized for its social interactions across all sexes and age/size groups. Its movement patterns, especially those of subadults, are poorly understood. Movement is a crucial factor for the effective conservation and management of wildlife. From October 2010 to September 2011, using VHF radio-tracking methods, we studied the movements of eight subadult females in the Trombetas River Biological Reserve (REBIO do Rio Trombetas) in Pará State, Brazil. We observed subadult females utilizing lake-channel systems near the Trombetas River with their movement rates positively influenced by their size and negatively by the water level of the river. Individuals remained in the flooded forest (igapó) during flooding, likely feeding on fruits and seeds. During the nesting season, we observed interactions between adult and subadult females near the nesting sandbanks. The proximity of subadult and adult Giant South American River Turtles suggests that social interactions, such as learning reproductive and nesting behaviors, could be vital for the movement of subadult females, going beyond simple resource availability.Downloads
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