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- Title
Diet of the freshwater stingray Potamotrygon motoro (Chondrichthyes: Potamotrygonidae) on Marajó Island (Pará, Brazil).
- Authors
Almeida, M. P.; Lins, P. M. O.; Charvet-Almeida, P.; Barthem, R. B.
- Abstract
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.
- Subjects
BRAZIL; POTAMOTRYGON; STINGRAYS; CHONDRICHTHYES; FISH food
- Publication
Brazilian Journal of Biology, 2010, Vol 70, Issue 1, p155
- ISSN
1519-6984
- Publication type
Article
- DOI
10.1590/S1519-69842010000100022