Feeding and morphological analysis of the digestive tract of four species of fish (Astyanax altiparanae, Parauchenipterus galeatus, Serrasalmus marginatus and Hoplias aff. malabaricus) from the upper Paraná River floodplain, Brazil

Peretti, Danielle; Andrian, I.F

doi:10.1590/s1519-69842008000300027

Cited by 33 publications

(20 citation statements)

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“…The knowledge of the feeding habits of different fish species associated with enzymes activities in the digestive tract is important to provide an appropriate diet for each species because digestive enzymes activity very reflects the changes in dietary (PERETTI & ANDRIAN, 2008;LAZZARI et al, 2010;2015).…”

Section: Discussionmentioning

confidence: 99%

Different feeding habits influence the activity of digestive enzymes in freshwater fish

et al. 2017

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The aim of this study was to verify the activity of some digestive enzymes in four fish species with different feeding habits. Knowledge of these enzymatic activities can help us to understand the species' digestive processes. The species chosen for this study were Ctenopharyngodon idella (herbivore), Rhamdia quelen (omnivore), Leporinus obtusidens (omnivore) and Hoplias malabaricus (carnivore). The digestive tract of these species was divided into four portions to estimate enzymatic activity: stomach, anterior, mid and posterior intestine. Ctenopharyngodon idella had the highest amylase and maltase activities in all portions of the gut, followed by L. obtusidens . The highest trypsin activity was observed in all gut portions of H. malabaricus, followed by the mid intestine of L. obtusidens and the anterior intestine of C. idella . The highest chymotrypsin activity was found in all portions of C. idella followed by the anterior intestines of R. quelen, L. obtusidens and H. malabaricus . In the stomach, acid protease activity was significantly lower in R. quelen and L. obtusidens compared to H. malabaricus. Ctenopharyngodon idella showed high activity of enzymes that hydrolyze carbohydrates, represented in this study by amylase and maltase and H. malabaricus showed higher protease activity and low amylase activity.

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Section: Discussionmentioning

confidence: 99%

Different feeding habits influence the activity of digestive enzymes in freshwater fish

et al. 2017

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“…Abelha et al, 2006) or insectivorous feeding habits (e.g. Lizama and Ambrosio, 2004;Peretti and Andrian, 2008). These classifications into different trophic guilds are probably related to differences in the physical environment and resource availability (Luiz et al, 1998;Lobón-Cerviá and Bennemann, 2000).…”

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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“…malabaricus and O. longirostris usually swallow their prey whole (Casatti et al, 2001;Peretti & Andrian, 2008) requiring them to feed less often (Nikolsky, 1963) resulting in low feeding activity. Increased condition factor, despite the decrease in repletion index, might be connected to the lower energetic cost to the capture, manipulation and digestion of the prey, as suggested by the availability of small-sized fish and morpho-physiological adaptations to piscivory.…”

Section: Discussionmentioning

confidence: 99%

“…Pimelodus present a very wide mouth opening, ability of store large amount of food in the stomach and histological adaptations to piscivory (Santos et al, 2007;Hahn & Fugi, 2008;Peretti & Andrian, 2008). These features allow eliciting the piscivorous behaviour by such species (Hahn & Fugi, 2008) providing better energy use and increase in the condition factor.…”

Section: Discussionmentioning

confidence: 99%

“…These features allow eliciting the piscivorous behaviour by such species (Hahn & Fugi, 2008) providing better energy use and increase in the condition factor. On the other hand, A. lacustris present terminal and small mouth, delicate stomach and longer intestine (Peretti et al, 2008) associated with a more omnivorous diet specialized for small food items, like algae and insects.…”

Section: Discussionmentioning

confidence: 99%

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Effects of river damming in Neotropical piscivorous and omnivorous fish: feeding, body condition and abundances

2016

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The increase in abundance of small-sized fishes is common after a reservoir is formed. There is an increase in the consumption of fish, from typically piscivorous fish to opportunistic species that take advantage of abundant resources. This study aims to evaluate the effects of diet changes induced by damming on the feeding activity and condition factor of typically piscivorous (Hoplias aff. malabaricus and Oligosarcus longirostris) and opportunistic (Astyanax lacustris (ex Astyanax altiparanae) and Pimelodus britskii). Sampling was conducted before and after the impoundment in the Iguaçu River in the region of Salto Caxias, Paraná State, Brazil. Stomach contents were analysed by the volumetric method. Feeding activity and body condition were inferred by the mean stomach repletion index and the mean condition factor. Typically piscivorous species presented a general tendency of decreased feeding activity and increased condition factor, while opportunistic species, presented a decrease in condition and feeding activity in the most affected sites. The increase in the condition factor of piscivorous fish suggests that these species benefit by the increased abundance of small size prey fish. Some opportunist species that do not have adjustments for the piscivorous diet, regardless of the intensity of consumption and resource availability, can suffer negative reflex when adopting a piscivorous diet.O aumento na abundância de peixes de pequeno porte é comum logo após a formação de um reservatório, levando a um aumento no consumo de peixes, tanto por peixes piscívoros como oportunistas que se aproveitam do recurso abundante. Esse estudo visa avaliar os efeitos da mudança de dieta induzida pelo represamento na atividade alimentar e condição nutricional, tanto de espécies piscívoras (Hoplias aff. malabaricus e Oligosarcus longirostris) quanto de espécies oportunistas (Astyanax lacustris (ex Astyanax altiparanae) e Pimelodus britskii). Para tanto, foram realizadas amostragens nas fases pré e pós-represamento no rio Iguaçu na região de Salto Caxias, Paraná, Brasil. Os conteúdos estomacais foram avaliados pelo método volumétrico. A atividade alimentar foi determinada pelo índice de repleção estomacal e a condição nutricional através do fator de condição relativo. As espécies tipicamente piscívoras apresentaram, em geral, incremento no fator de condição e queda na atividade alimentar e a espécie mais oportunista apresentou queda no fator de condição e índice de repleção nas regiões mais afetadas pelo represamento. O aumento no fator de condição de espécies piscívoras sugere que estas se beneficiam pelo aumento de abundância das espécies de pequeno porte. Enquanto espécies que não possuem adaptações para uma dieta piscívora, independente da intensidade de consumo e disponibilidade desse recurso, podem sofrer reflexos negativos em sua condição nutricional, em detrimento da ausência de pré-adaptações à piscivoria.

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Feeding and morphological analysis of the digestive tract of four species of fish (Astyanax altiparanae, Parauchenipterus galeatus, Serrasalmus marginatus and Hoplias aff. malabaricus) from the upper Paraná River floodplain, Brazil

Cited by 33 publications

References 11 publications

Different feeding habits influence the activity of digestive enzymes in freshwater fish

Different feeding habits influence the activity of digestive enzymes in freshwater fish

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

Effects of river damming in Neotropical piscivorous and omnivorous fish: feeding, body condition and abundances

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