Estudo do comportamento alimentar de raias de água doce em cativeiro, e de seus aspectos biológicos

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

Freshwater stingrays (Potamotrygonidae) belong to the only family of elasmobranches totally adapted for live in freshwater. Not much is known about them and their biological aspects. They own special skills for active predation and appropriate to several kinds of food. The studies about freshwater stingrays, essentially of behavior, are rare, people believe that they are dangerous animals and their biological matter is not often understands. In propose of study and compare the feeding behavior and other kinds of manners in the stingrays Potamotrygon scobina and Potamotrygon henlei in captivity, observations had been done during 30 days between February and May in Jardim Zoológico Aquário de São Paulo. Were collected data about place location, animals interaction and activity, spiracular tubes opening frequency and diet composition. Controlling the chemical and physical data of the water tank, avoiding result variations, noticed that the higher activity occur after feeding, suggest a continuous of the high metabolism initiated with the food offer. The spiracular tubes opening frequency was higher because an elevation in breath frequency. Its also noticed the domination of P. scobina, larger stingray, that prefer the feeding spot of the tank. Ending the study, is possible conclude that both studied species have similar feed behavior in captivity.

ASSUNTO(S)

potamotrygonidae cativeiro captivity biologia geral potamotrygonidae comportamento alimentar raias de água-doce feeding behavior freshwater stingrays

ACESSO AO ARTIGO

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