Journal
BRAZILIAN JOURNAL OF BIOLOGY
Volume 70, Issue 1, Pages 155-162Publisher
INT INST ECOLOGY
DOI: 10.1590/S1519-69842010000100022
Keywords
fish feeding; Estuarine habitats; Chondrichthyes
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Funding
- National Counsel of Technological and Scientific Development
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The stomach contents of 137 examples of Potamotrygon motoro caught in 3 locations (Muana, Afua and Lake Arari) on Marajo Island were analysed. The values of the Index of Relative Importance (IRI) and its respective percentage (%IRI) were calculated. The level of repletion 1 (1/4 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 Afua, fish in Lake Arari and mollusks in Muana.
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