Mudança na dieta da traíra Hoplias malabaricus (Bloch) (Erythrinidae, Characiformes) em lagoas da bacia do rio Doce devido à introdução de peixes piscívoros

Pompeu, None Paulo dos Santos; Godinho, Alexandre Lima

doi:10.1590/s0101-81752001000400016

Cited by 26 publications

(13 citation statements)

References 11 publications

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“…This study also found an importance of piscivore fish, with H. malabaricus and A. pantaneiro combined, the second and third largest catches respectively in terms of biomass. The capacity of both to adapt their feeding according to the most abundant prey in the reservoirs (Cantanhede et al, 2008;Pompeu and Godinho, 2001;Novakowski et al, 2007), certainly favored the maintenance of these species under different conditions. Added to the adaptive qualities of the A. pantaneiro, portioned spawning with relatively high fertilization and an absence of parental care (Meurer and Zaniboni-Filho, 2012).…”

Section: Discussionmentioning

confidence: 99%

Structure dynamics of a fish community over ten years of formation in the reservoir of the hydroelectric power plant in upper Uruguay River

Schork

Zaniboni‐Filho

2017

Braz. J. Biol.

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The objective of this study was to evaluate the structure of the fish assemblage in the ten years following the closing of the lake of the Itá Hydroelectric Power Plant. Seasonal collections were conducted from 2001 to 2010. During this period, 44,834 fish were captured, totaling 3,818.01 kg, among 8 orders, 24 families and 84 species. In general, profound changes were not observed in the fish assemblage in the ten years after the formation of the Itá lake. Few species changed in dominance over time, while many were rare in the environment. The ichthyofauna in the reservoir was dominated by small and medium size opportunist species that conduct short or no migratory movements. Among the most abundant, six species were responsible for more than 50% of the numeric representation: Steindachnerina brevipinna, Astyanax fasciatus, Apareiodon affinis, Hypostomus isbrueckeri, Iheringichthys labrosus and Loricariichthys anus. The increase in the representation of the later species stood out. The biomass was dominated by Steindachneridion scriptum, Prochilodus lineatus, I. laborsus, Schizodon nasutus, Hoplias malabaricus, Acestrorhynchus pantaneiro, Hoplias lacerdae, H. isbrueckeri and L. anus. Despite the presence of large migrators in the region of the reservoir, their vulnerability was revealed by the low numeric abundance and accidental capture. The k-dominance curve of numerical abundance and biomass indicates a moderately disturbed community, in which the representation of small species was also important to the amounts of biomass.Keywords: dam, ichthyofauna, southern Brazil, temporal variation, Itá.Dinâmica da estrutura da comunidade íctica ao longo de dez anos da formação do reservatório da usina hidrelétrica no Alto Rio Uruguai Resumo O objetivo deste trabalho foi avaliar a estrutura da assembleia de peixes nos dez anos seguintes ao fechamento do lago da Usina Hidrelétrica de Itá. Para isto, foram realizadas coletas com periodicidade sazonal no período compreendido entre 2001 e 2010. Durante o período de estudo, foram capturados 44834 peixes, totalizando 3818,01 kg, distribuídos em 8 ordens, 24 famílias e 84 espécies. De uma forma geral, a assembleia de peixes não mostrou alterações profundas nos dez anos após a formação do lago de Itá. Poucas espécies alternam-se na dominância ao longo do tempo, enquanto muitas mostraram-se como raras no ambiente. A ictiofauna do reservatório foi dominada por espécies oportunistas, de pequeno e médio porte e que realizam curtos ou nenhum movimento migratório. Entre as mais abundantes, seis espécies foram responsáveis por mais de 50% da representatividade numérica, sendo elas: Steindachnerina brevipinna, Astyanax fasciatus, Apareiodon affinis, Hypostomus isbrueckeri, Iheringichthys labrosus e Loricariichthys anus. Destaque para aumento da representatividade deste último. Já para a biomassa, destacaram-se: Steindachneridion scriptum, Prochilodus lineatus, I. labrosus, Schizodon nasutus, Hoplia smalabaricus, Acestrorhynchus pantaneiro, Hoplias lacerdae, H. isbrueckeri e L. ...

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Section: Discussionmentioning

confidence: 99%

Structure dynamics of a fish community over ten years of formation in the reservoir of the hydroelectric power plant in upper Uruguay River

Schork

Zaniboni‐Filho

2017

Braz. J. Biol.

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“…This degree of overlap might be related to the opportunistic behavior of these species, given their capacity to change their diet composition according to prey availability or due to biotic interactions, such as competition and predation (Pompeu, Godinho, 2001;Carvalho et al, 2002). In fact, H. mbigua, as other species of Hoplias, presented high feeding plasticity, defined by a varied diet composed of crustaceans, insects, and plants, in addition to a frog (Trachycephalus typhonius -Strictar-Pereira, Oda, 2012).…”

Section: Discussionmentioning

confidence: 99%

Is coexistence between non-native and native Erythrinidae species mediated by niche differentiation or environmental filtering? A case study in the upper Paraná River floodplain

et al. 2017

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The limiting similarity theory predicts that divergence in the functional traits of native and introduced species is an essential component in species establishment, as introduced species must occupy a niche that is unoccupied by resident species. On the other hand, the environmental filtering hypothesis predicts convergence between introduced and native species, as both possess traits that make them adapted to the local abiotic environment. Morphology, spatial co-occurrence, diet, feeding selectivity, and niche breadth and overlap of Erythrinidae were evaluated to detect possible mechanisms acting in the coexistence between non-native and native species. Native (Hoplias sp. B and Hoplias cf. malabaricus) and nonnative (Hoplerythrinus unitaeniatus and Hoplias mbigua) species presented differences in morphological traits, spatial cooccurrence, diet, selectivity, and niche breadth and overlap. The mechanisms mediating species coexistence seem to vary according to species. The absence of spatial and feeding overlap suggests that non-native species H. unitaeniatus occupy a different niche than native species, supporting its successful establishment without eliminating the native species. However, low feeding overlap and similar morphologies between non-native and native species of Hoplias point to environmental filters; in this case, the non-native H. mbigua is able to establish due to similarities in functional traits.Keywords: Competition, Co-occurrence, Fish feeding, Morphology, Predation.Teorias sobre nicho ecológico afirmam que divergência em traços funcionais entre espécies nativas e introduzidas são essenciais ao estabelecimento da espécie introduzida, pois estas devem ocupar um nicho não utilizado pelas espécies residentes. Por outro lado, a teoria de filtros ambientais afirma a convergência entre espécies introduzidas e nativas, pois ambas possuem traços funcionais que fazem com que essas espécies estejam mais adaptadas as variáveis ambientais. Foram avaliadas a morfologia, ocorrência espacial, dieta, seletividade alimentar, sobreposição e largura de nicho em Erythrinidae para detectar possíveis mecanismos atuando na coexistência de espécies nativas e não nativas. Espécies nativas (Hoplias sp. B e Hoplias cf. malabaricus) e não nativas (Hoplerythrinus unitaeniatus e Hoplias mbigua) apresentaram diferenças em todos os atributos testados. Os mecanismos mediando a coexistência de espécies nativas e não nativas parecem variar de acordo com a espécie considerada. A ausência de sobreposição espacial e na dieta sugere que a espécie não nativa H. unitaeniatus ocupa um nicho distinto que as espécies nativas, favorecendo seu estabelecimento sem eliminar as espécies nativas, apontando para segregação de nicho. Por outro lado, morfologias similares, porém com diferentes dietas foram observadas para as espécies de Hoplias, sugerindo que as espécies coexistem devido à filtros ambientais, assim, neste caso, a espécie não nativa H. mbigua é capaz de se estabelecer no novo ambiente devido à similaridades em traços funcionai...

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“…When the tucunaré is introduced into favorable conditions, what may result is the extinction of some autochthonous species through predation (Zaret & Paine, 1973;Godinho & Formagio, 1992;Molina et al, 1996). On the other hand, this threat may be offset by dietary flexibility of endemic tropical piscivores (competitors of the introduced piscivores), which in these environments may be contributing to assure population maintenance (Pompeu & Godinho, 2001). …”

Section: Alimentary Items Popular Namesmentioning

confidence: 99%

“…According to its abundance, it causes modifications in autochthonous fishes populations (Godinho & Formagio, 1992;Fonteles-Filho & Alves, 1995;Pompeu & Godinho, 2001).…”

Section: Introductionmentioning

confidence: 99%

Feeding of introduced species of Cichla (Perciformes, Cichlidae) in Volta Grande reservoir, River Grande (MG/SP)

Gomiero

Braga

2004

Braz. J. Biol.

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Both species studied, Cichla cf. ocellaris and Cichla monoculus, fed mainly on fish, the first on Cichla spp., Plagioscion squamosissimus, and Tilapia rendalli, and the second, Cichla monoculus, on Cichla spp. Both diets indicated a strong correlation among the food items. Remarkable ontogenetic change was noted in both species diet: the young fed on crustaceans and insects while the adults fed mainly on fishes. The species studied, which are highly adapted to a brief life span, cause serious damage to the fish communities by predation, competition, and cascade effects throughout the whole trophic chain.Key words: feeding, Cichla, tucunaré, reservoir, introduction, Rio Grande. RESUMOAlimentação de espécies introduzidas de Cichla (Perciformes, Cichlidae) no reservatório de Volta Grande, Rio Grande (MG/SP)A alimentação de Cichla cf. ocellaris e Cichla monoculus consistiu principalmente de peixes. Cichla cf. ocellaris alimentou-se de Cichla spp. (tucunaré), Plagioscion squamosissimus (corvina) e Tilapia rendalli (tilápia), enquanto Cichla monoculus alimentou-se de Cichla spp. As duas dietas foram analisadas e mostraram correlação entre os itens alimentares, ou seja, as dietas são iguais. Houve notória mudança ontogenética na dieta das duas espécies, sendo que os jovens se alimentaram com crustáceos e insetos e os adultos, principalmente com peixes. A introdução desses predadores altamente adaptados e de rápida proliferação causa sérios danos a essas comunidades ícticas pela predação, pela competição e pelos efeitos em cascata na cadeia trófica.Palavras-chave: alimentação, Cichla, tucunaré, reservatório, introdução, Rio Grande.

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Mudança na dieta da traíra Hoplias malabaricus (Bloch) (Erythrinidae, Characiformes) em lagoas da bacia do rio Doce devido à introdução de peixes piscívoros

Abstract: ABSTRACT. Dict changes of the trahira Hoplias malabariCIIs (Bloch) (Erythrinidac, Characiformes) due to piscivorous introductions in Rio Doce valley lakes.

Cited by 26 publications

References 11 publications

Structure dynamics of a fish community over ten years of formation in the reservoir of the hydroelectric power plant in upper Uruguay River

Structure dynamics of a fish community over ten years of formation in the reservoir of the hydroelectric power plant in upper Uruguay River

Is coexistence between non-native and native Erythrinidae species mediated by niche differentiation or environmental filtering? A case study in the upper Paraná River floodplain

Feeding of introduced species of Cichla (Perciformes, Cichlidae) in Volta Grande reservoir, River Grande (MG/SP)

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