Diet of the freshwater stingray Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) on Marajó Island (Pará, Brazil)

Brazilian Journal of Biology

Mp. Almeida²  Pmo. Lins¹  P. Charvet-almeida¹  Rb. Barthem¹ 

[1] ,Universidade Federal do Paraná Departamento de Zoologia Laboratório de Ictiologia EstuarinaCuritiba PR ,Brazil

关键词: fish feeding;    Estuarine habitats;    Chondrichthyes;    alimentação de peixes;    ambientes estuarinos;    Chondrichthyes;   

DOI  :  10.1590/S1519-69842010000100022

来源: SciELO

【 摘 要 】

The stomach contents of 137 examples of Potamotrygon motoro caught in 3 locations (Muaná, Afuá and Lake Arari) on Marajó Island were analysed. The values of the Index of Relative Importance (IRI) and its respective percentage (%IRI) were calculated. The level of repletion 1 (¼ full) was the most representative for both sexes, as well as for immature and mature specimens. Most of the food items found were well-digested. The food items identification indicated the presence of 15 orders, including insects, mollusks, crustaceans, annelids and fish. Differences in diet were observed among the locations studied when comparing %IRI, crustaceans being the most preferred in Afuá, fish in Lake Arari and mollusks in Muaná.

【 授权许可】

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