4 documents found, page 1 of 1
The use of hydroelectric lakes by giant otters Pteronura brasiliensis: Balbina ...
Weber Rosas, Fernando Cesar; Mattos, Gália Ely de; Cabral, M. M. M.Data on the occurrence and habitat use of giant otters Pteronura brasiliensis in the 4,437 km2 of Balbina hydroelectric lake in central Amazonia, Brazil, were collected from September 2001 to December 2005. Twenty-nine groups of giant otters were recorded in an area corresponding to 10% of the total reservoir. Despite the fact that it is a hydroelectric lake, the water level can vary annually by up to 3.5 m wit...
Parental and alloparental care of giant otters (Pteronura brasiliensis) (Carniv...
Weber Rosas, Fernando Cesar; Cabral, M. M. M.; Mattos, Gália Ely de; Silva, Roberta EliseData collected during 6 years showed that alloparental care, despite not being mandatory, plays an important role in the reproductive success of Pteronura brasiliensis when major threats are present. Threats can also trigger cubs to be transferred from one den to another, inducing the species to leave a babysitter in the new den.
Feeding habits of giant otters Pteronura brasiliensis (Carnivora: Mustelidae) i...
Cabral, M. M. M.; Zuanon, Jansen; Mattos, Gália Ely de; Weber Rosas, Fernando CesarThis study aimed to identify the diet of giant otters, Pteronura brasiliensis (Zimmermann, 1780) in the Balbina reservoir (01°55'S, 59°29'W), to compare it with literature data on the diet of giant otters from non-dammed areas, and to verify the effects of the seasonal changes in water levels on the feeding habits of Balbina otters. A total of 254 feces samples were collected and identified according to the low...
Body weight-length relationships in giant otters (Pteronura brasiliensis) (Carn...
Weber Rosas, Fernando Cesar; Rocha, Carla Soares da; Mattos, Gália Ely de; Lazzarini, Stella MarisFew giant otters (Pteronura brasiliensis) have been measured and weighed and its actual size is controversial in the literature. This study presents the weight-length relationship of Amazonian giant otters using 15 captive individuals. The maximum length and weight were 163cm and 22.5kg, and 162cm and 28.8kg, for the males and females, respectively. The weight-length relationships were not significantly differe...