Amazing Tambopata Volunteers
Amazon River Turtle .Adults have a domed carapace with only a slight medial keel amazon river turtle ; the keel is pronounced in juveniles. The carapace is smooth in adults and fiares out over the hind limbs. Distinct growth rings are present in subadults.
SUMMARY:
Amazon River Turtle .Adults have a domed carapace with only a slight medial keel amazon river turtle ; the keel is pronounced in juveniles. The carapace is smooth in adults and fiares out over the hind limbs. Distinct growth rings are present in subadults.
Amazon River Turtle
Description: Males are smaller than females. Amazon River Turtle -We measured 747 males and 88 females in rio Guaporé, Rondónia, Brazil; carapace length in males ranged from 9.8 to 36.9 cm (mean = 26.4) and in females, 12.4 to 46.5 cm (mean = 35.0); males weighed 0.15-4.30 kg (mean = 2.26) and females, 0.30-11.20 kg (mean = 5.77). Females are mature at 31.3 cm in Brazil. These data are similar to those in Colombia, where males reach 27.3 cm and females, 43.4.
The largest Venezuelan specimen measured 46.5 cm in carapace length.
Adult females in Perú Amazon sandova lake on the Samiria River measured 38.6-51.8 cm (mean = 44.5, n = 33) in curved carapace length and weighed 5.25-11.00 kg (mean = 8.17).Another sample of 54 nesting females on the Pacaya river gave very similar results, with curved carapace lengths of 38.0-50.5 cm (mean = 44.7).After nesting, 17 weighed 6.05-12.50 kg (mean = 8.73).
The largest and heaviest one of this sample had a straight- line carapace length of 47.7 cm and a plastral length of 43.1 cm, evidently the largest specimen on record in this amzon wildlife (Sandoval Lake).
DETAILED ITINERARY:
Amazon River Turtle
The Amazon River Turtle carapace of hatchlings is dark gray – amazon river turtle brown, or olive green with a yellow-orange border, that of adult males is often black while that of females tends to be gray or light brown. The
anterior lobe of the plastrón is broader than the posterior lobe.
The distinct anal notch is larger in males than in females.
The plastrón is yellow in juveniles but mottled or brown or black in adults.
The head has a notched upper jaw and elongated snout.The upper surface of the jaw has two ridges.presumably functional for cutting and crushing plant material.
An elongated interparietal scale incompletely separates the parietals.
An interobital groove is absent.
Usually one, sometimes two, chin barbéis are present.The head of juveniles and males is dark green or brown with bright yellow orange spots.
The spotting pattern varíes between populations and individuáis, but generally there are postorbital, suborbital,
interorbital, nasal, and parietal spots, as well as elongated spots above the tympanum and along the lower jaw. The
heads of adult females are uniform rust brown.The limbs and tail are gray, black, or light brown.
Males have a longer, thicker tail and retain the juvenile head coloration, but it is less brilliant. The pattern may be lost entirely in some males (Sandoval Lake).
Distribution Amazonia Wildlife (Sandoval Lake) to Amazon River Turtle .
The Yellow-spotted Amazon River turtle has a wide distribution in tropical lowlands of northern South America in
the Orinoco and Amazon River basins of Venezuela, eastern Colombia, eastern Ecuador, northeastern Sandoval Lake
Amazon Peru, French Guiana, Guyana, Surinam, the Amazon River Basin in northern Brazil, and northern Bolivia.
Habita in the Amazon Peru (Sandoval Lake )
Podocnemis unifilis thrives in a wide variety of habitats: large rivers, lakes, oxbow Manu park Sandoval Lake , marshes, swamps, and ponds and creeks, while the adults flourish in largor bodies of water.
The Yellow-spotted Amazon River un tic are fond of basking and appear to be quite social, basking in large groups on logs, often on top of each otlier. They bask less frequently on sandbars. Both sexes and individuáis of all sizes can be seen basking.
Groups of juveniles tend to bask together rather than with adults. Sex ratios were found to be skewed 6:1 in favor of males in Guaporé river in Rondónia, Brazil, but 4:1 in favor of females in a tributary ofTrombetas river.
These differences may represent the effect of temperature- controlled sex determination on the primary sex ratio produced in these areas or may be the result ofdifferential predation on nesting females in Amazon river (Sandoval Lake).