Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

PRUDENTE, Bruno da Silveira; MARINHO, Pedro Carneiro; VALENTE, Roberta de Melo

Artigo

Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

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 an...

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Autor principal:	PRUDENTE, Bruno da Silveira
Outros Autores:	MARINHO, Pedro Carneiro, VALENTE, Roberta de Melo
Grau:	Artigo
Idioma:	eng
Publicado em:	Instituto Nacional de Pesquisas da Amazônia 2019
Assuntos:	Bacia Amazônica Pulso de inundação Amplitude de nicho Índice de repleção Amazon basin Flood pulse Niche breadth Repletion index
Acesso em linha:	http://repositorio.ufpa.br/jspui/handle/2011/10782 http://dx.doi.org/10.1590/1809-4392201600123

id	ir-2011-10782
recordtype	dspace
spelling	ir-2011-107822020-03-04T18:28:15Z Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil Ecologia alimentar de Serrasalmus gouldingi (Characiformes: Serrasalmidae) na região do baixo Rio Anapu, Amazônia Oriental, Brasil PRUDENTE, Bruno da Silveira MARINHO, Pedro Carneiro VALENTE, Roberta de Melo Bacia Amazônica Pulso de inundação Amplitude de nicho Índice de repleção Amazon basin Flood pulse Niche breadth Repletion index 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. CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico Estudos sobre ecologia trófica dos peixes são importantes ferramentas para compreensão das relações entre as espécies e as variações sazonais no ambiente. Em rios tropicais essas relações são modeladas principalmente por variações hidrológicas. Sendo assim, o objetivo presente estudo é avaliar a influência variação fluviométrica e do estágio de vida (juvenis e adultos) na ecologia alimentar de Serrasalmus gouldingi na região do baixo Rio Anapu, Amazônia Oriental, Pará, Brasil. Os espécimes foram amostrados bimensalmente considerando quatro períodos hidrológicos distintos. Nós avaliamos a composição da dieta, intensidade alimentar e amplitude de nicho da espécie. Foram identificados trinta e dois itens alimentares agrupados em dez categorias. Um total de 279 estômagos foi analisado, registrando um predomínio no consumo de fragmento de peixes seguido por frutos e sementes. A composição na dieta de S. gouldingi diferiu apenas entre os períodos de seca e cheia, não diferindo entre juvenis e adultos. Uma maior intensidade alimentar foi observada durante o aumento do nível dos rios, com uma menor intensidade alimentar durante os períodos transicionais. Durante o período de cheia S. gouldingi também evidenciou uma menor amplitude de nicho, a qual foi atribuída ao elevado consumo de frutos e sementes. Sendo assim, a dieta de S. gouldingi foi classificada como onívora com forte tendência a piscivoria. Embora menos evidente do que em outras regiões da Amazônia, o pulso de inundação na região do baixo Rio Anapu também afeta a ecologia alimentar da espécie. UFPA - Universidade Federal do Pará 2019-03-21T19:38:26Z 2019-03-21T19:38:26Z 2016-09 Artigo de Periódico 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: http://dx.doi.org/10.1590/1809-4392201600123. Disponível em: http://repositorio.ufpa.br/jspui/handle/2011/10782. Acesso em:. 1809-4392 http://repositorio.ufpa.br/jspui/handle/2011/10782 http://dx.doi.org/10.1590/1809-4392201600123 eng Acta Amazonica Acesso Aberto application/pdf Instituto Nacional de Pesquisas da Amazônia Brasil INPA http://ref.scielo.org/2dx8rc
institution	Repositório Institucional - Universidade Federal do Pará
collection	RI-UFPA
language	eng
topic	Bacia Amazônica Pulso de inundação Amplitude de nicho Índice de repleção Amazon basin Flood pulse Niche breadth Repletion index
spellingShingle	Bacia Amazônica Pulso de inundação Amplitude de nicho Índice de repleção Amazon basin Flood pulse Niche breadth Repletion index PRUDENTE, Bruno da Silveira Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
topic_facet	Bacia Amazônica Pulso de inundação Amplitude de nicho Índice de repleção Amazon basin Flood pulse Niche breadth Repletion index
description	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.
format	Artigo
author	PRUDENTE, Bruno da Silveira
author2	MARINHO, Pedro Carneiro VALENTE, Roberta de Melo
author2Str	MARINHO, Pedro Carneiro VALENTE, Roberta de Melo
title	Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
title_short	Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
title_full	Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
title_fullStr	Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
title_full_unstemmed	Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil
title_sort	feeding ecology of serrasalmus gouldingi (characiformes: serrasalmidae) in the lower anapu river region, eastern amazon, brazil
publisher	Instituto Nacional de Pesquisas da Amazônia
publishDate	2019
url	http://repositorio.ufpa.br/jspui/handle/2011/10782 http://dx.doi.org/10.1590/1809-4392201600123
_version_	1832605170695929856
score	11.755432

Feeding ecology of Serrasalmus gouldingi (Characiformes: Serrasalmidae) in the lower Anapu River region, Eastern Amazon, Brazil

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