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Title: Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
Other Titles: Ecologia alimentar de Serrasalmus gouldingi (Characiformes: Serrasalmidae) na região do baixo Rio Anapu, Amazônia Oriental, Brasil
metadata.dc.creator: PRUDENTE, Bruno da Silveira
MARINHO, Pedro Carneiro
VALENTE, Roberta de Melo
Keywords: Bacia Amazônica
Pulso de inundação
Amplitude de nicho
Índice de repleção
Amazon basin
Flood pulse
Niche breadth
Repletion index
Issue Date: Sep-2016
Publisher: Instituto Nacional de Pesquisas da Amazônia
Citation: PRUDENTE, Bruno da Silveira et al. Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil. Acta Amazonica, Manaus, v. 46, n. 3, p. 259-270, July/Sept. 2016. DOI: Disponível em: Acesso em:.
Abstract: Studies on feeding ecology of fishes are important to understand the relationship between species and environmental seasonal variations. In tropical rivers, these relationships are mainly modeled by hydrological patterns. Thereby, this study aimed to assess the influence of fluviometric variation and life stage (juveniles and adults) in the feeding ecology of Serrasalmus gouldingi in the lower Anapu River region, located in Eastern Amazon, Pará, Brazil. Specimens were collected bimonthly, considering four different hydrological periods. We assessed the diet composition, feeding intensity and niche breadth of the species. Thirty-two dietary items were identified and grouped into ten categories. A total of 279 stomachs were analyzed, showing a predominance of fish fragments, followed by fruits and seeds. The diet composition of S. gouldingi differed only between drought and flood season, although it did not differ between juveniles and adults. An increase in feeding intensity was recorded during the rise in the water level, with a lower feeding intensity observed during transitional season. Serrasalmus gouldingi showed lower niche breadth during flood season, attributed to the high consumption of fruits and seeds, presenting an omnivorous diet with high tendency towards piscivory. Although less evident than in other Amazon watersheds, the flood pulse in the lower Anapu River region is an important factor influencing the feeding ecology of the species.
ISSN: 1809-4392
Appears in Collections:Artigos Científicos - ICB

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