Feeding ecology of stream-dwelling fishes from a coastal stream in the Southeast of Brazil

Mazzoni, Rosana; Costa, Leandro Damião Soares da

doi:10.1590/s1516-89132007000400008

Cited by 30 publications

(22 citation statements)

References 16 publications

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“…Astyanax species have omnivorous diets, which are composed of animal and vegetal items, both autochthonous and allochthonous in origin (Esteves, 1996;Andrian et al, 2001;Vilella et al, 2002;Cassemiro et al, 2002;Gomiero and Braga, 2003;Bennemann et al, 2005;Mazzoni and Costa, 2007). However, some studies report that Astyanax has omnivorous/herbivorous (e.g.…”

Section: Introductionmentioning

confidence: 99%

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Rezende

Mazzoni

2012

Braz. J. Biol.

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In this work we aimed to characterise the diet of Astyanax taeniatus (Jenyns 1842) (Characiformes, Characidae) along the Mato Grosso stream and we hypothesised that the diet of this species would vary according to spatial, seasonal and ontogenetic differences. Specimens were collected every second month at three sites with different physical attributes. The feeding habits of 651 specimens were analysed using the Alimentary Index (IA i ). Analysis of the diet showed an effect of spatial, temporal and ontogenetic factors. Vegetal allochthonous items were more important in the diet of Astyanax taeniatus in upstream sites while animal autochthonous items were more important downstream. Ontogenetic differences in the diet were significant only in upstream sites, where adults consumed a greater amount of vegetal matter than juveniles. These results reinforce the idea that Astyanax species are opportunistic and show trophic plasticity.Keywords: feeding, opportunism, stream fish. Plasticidade trófica em Astyanax taeniatus de um riacho costeiro do Sudeste do Brasil ResumoNeste trabalho, objetivou-se caracterizar a dieta de Astyanax taeniatus (Jenyns 1842) (Characiformes, Characidae) ao longo do Rio Mato Grosso, com a hipótese de que a espécie apresente variações espaciais, sazonais e ontogenéticas. Os exemplares foram coletados bimestralmente em três localidades, que diferiram pelas variáveis físicas. As preferências alimentares foram analisadas a partir de 651 exemplares, utilizando-se o Índice Alimentar (IA i ). Foram avaliadas diferenças espaciais, sazonais e ontogenéticas a partir dos dados de dieta. Os itens de origem vegetal e alóctone foram mais importantes na dieta da espécie para as localidades com maior altitude, enquanto os itens animais e autóctones, na localidade baixa. Na dieta de jovens e adultos, houve diferença significativa na contribuição de itens de origem vegetal e animal somente na localidade mais alta, onde os adultos consumiram maior quantidade de matéria vegetal. Os resultados reforçam a ideia de que as espécies de Astyanax possuem hábito alimentar onívoro e oportunista, evidenciando sua alta plasticidade alimentar ao longo do riacho.Palavras-chave: alimentação, oportunismo, peixe de riacho.

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Section: Introductionmentioning

confidence: 99%

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Rezende

Mazzoni

2012

Braz. J. Biol.

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“…Young individuals of the first standard length class consumed a large amount of zooplankton. The ontogenetic variations in freshwater fish diet have been commonly reported in the literature (Hahn et al, 2000;Lima-Junior and Goitein, 2003;Cassemiro et al 2008;Mazzoni and Costa, 2007;Agostinho et al, 2009;Suiberto et al, 2009;Abilhoa et al, 2010;Lima and Behr, 2010;Mazzoni et al, 2010;Bonato and Fialho, 2014). The ontogenetic variations found in the H. marginatus diet in the Beija-Flor stream are determined by the size of the fish, prey and ease of predation of available food resources, as the fish become adults, predation by the zooplankton item undergoes a significant decrease.…”

Section: Discussionmentioning

confidence: 82%

Trophic ecology of Hemigrammus marginatus Ellis, 1911 (Characiformes, Characidae) in a conserved tropical stream

et al. 2016

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The trophic ecology of ichthyofauna in a stream can be related to the presence or absence of riparian and aquatic vegetation, and mainly resource availability. Therefore, the aim of this study was to analyse the seasonal and ontogenetic variations for the trophic ecology of Hemigrammus marginatus in the Beija-Flor stream located at the Jataí Ecological Station in the municipality of Luiz Antônio-SP, Brazil. In order to attain this objective, the data collections were carried out on a monthly basis from August, 2011 to July, 2012. Fish were collected using a trawl net and bait traps from three collection stations distributed along the Beija-Flor stream. The quality of the water was evaluated by the chemical variables: ammonia, nitrate, total nitrogen, total phosphorus, and physical temperature, dissolved oxygen, pH, turbidity and conductivity, obtained by using a Yellow Springs sonde. The collected specimens were fixed in 10% formalin in the field and were subjected to biometric measurements in the laboratory. The stomachs were weighed and transferred to 70% alcohol and the stomach contents were analysed using a stereomicroscope at the lowest possible taxonomic level. The species was considered insectivorous and the autochthonous food items were the most important during the dry season, mainly from the orders Ephemeroptera and Trichoptera, while allochthonous items from the order Hymenoptera were more important in the wet season. The young individuals' diet was based on the consumption of zooplankton, and insofar as the fish develops, there was a decrease in this item in the diet showing that the species has ontogenetic shifts in its diet. The conservation state of the Beija-Flor stream, as well as the flexibility of using food and food resources provided by aquatic macrophytes and riparian vegetation are key factors for the high abundance of the H. marginatus species.Keywords: stream fish, diet, ontogenetic variations, riparian vegetation, upper Paraná basin, seasonality. Ecologia trófica do Hemigrammus marginatus Ellis, 1911 (Characiformes, Characidae) em um riacho tropical conservado ResumoA ecologia trófica da ictiofauna em um riacho pode estar relacionada à presença ou ausência de mata ciliar e vegetação aquática, e principalmente pela disponibilidade de recursos no ambiente. Assim, o objetivo deste estudo foi analisar as variações sazonais e ontogenéticas na ecologia trófica de Hemigrammus marginatus no córrego Beija-Flor, localizado na Estação Ecológica de Jataí, localizada no município de Luiz Antônio-SP, Brasil. Para atender esse objetivo as coletas de dados foram realizadas mensalmente no período de agosto de 2011 a julho de 2012. Os peixes foram coletados utilizando rede de arrasto e armadilhas iscadas, em três estações de coleta distribuídas ao longo do córrego Beija-Flor. A qualidade da água foi avaliada pelas variáveis químicas amônia, nitrato, nitrogênio total, fósforo total, e físicas temperatura, oxigênio dissolvido, pH, turbidez e condutividade, obtidas com auxilio de uma sonda Yellow Sp...

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“…The consumption of allochthonous vs. autochthonous, bentonic vs. nektonic feeding behaviour were recurrently registered in the literature on Pimelodella species (e.g. Mazzoni and Costa, 2007;Casatti et al, 2001). All of those mentioned differences in the feeding behaviour of Pimelodella species reflected local differences.…”

Section: Resultsmentioning

confidence: 93%

“…3, Such environmental differences are normally reflected in fish diet because species show great flexibility in their trophic ecology (Gerking, 1994). In fact, Pimelodella species have been classified in different trophic categories varying between omnivory, feeding upon autochthonous and allochthonous insects, plant parts (Viana et al, 2006) and scales (Costa, 1987) and insectivory, feeding exclusively upon insects (Soares-Porto, 1994;Casatti et al, 2001;Mazzoni and Costa, 2007). These results were obtained from studies developed in 1 st and 2 nd order streams where environmental parameters are very important for biological processes.…”

Section: Resultsmentioning

confidence: 99%

Diet and feeding daily rhythm of Pimelodella lateristriga (Osteichthyes, Siluriformes) in a coastal stream from Serra do Mar - RJ

et al. 2010

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Feeding ecology of stream-dwelling fishes from a coastal stream in the Southeast of Brazil

Abstract: The relationship between ontogenetic variation of intestine length and feeding habits of five stream-dwelling fish species from the Ubatiba River were investigated. Analysed data were based on two size categories (juveniles and adults) and two food categories (animal and vegetal

Cited by 30 publications

References 16 publications

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Plasticity in the diet of Astyanax taeniatus in a coastal stream from south-east Brazil

Trophic ecology of Hemigrammus marginatus Ellis, 1911 (Characiformes, Characidae) in a conserved tropical stream

Diet and feeding daily rhythm of Pimelodella lateristriga (Osteichthyes, Siluriformes) in a coastal stream from Serra do Mar - RJ

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