Feeding biology of a guild of benthivorous fishes in a sandy shore on south-eastern Brazilian coast

Zahorcsak, P.; Silvano, Renato Azevedo Matias; Sazima, Iván

doi:10.1590/s0034-71082000000300016

Cited by 44 publications

(38 citation statements)

References 14 publications

(32 reference statements)

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“…Prior studies have shown that differences in composition and feeding activity can occur among fish species, which reduces overlap in the supposed partitioning of resources and promotes co-existence and use of their habitats (Zahorcsak et al 2000;Denadai et al 2012). The results obtained in the present study demonstrated that dietary compositions of the species within the same family were particularly similar.…”

Section: Discussionsupporting

confidence: 61%

Dietary overlap and food resource partitioning among fish species of a tropical estuary in Northeastern Brazil

Garcia¹,

Vendel²

2016

Gaia Sci.

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-The current work investigates dietary overlap and food partitioning among nine abundant carnivorous fishes caught in the shallow waters of the Paraíba do Norte river estuary, Paraíba State, Brazil. Fishes were sampled with a beach seine net between January and December 2008 and a total of 958 specimens had their stomach content analyzed. Crustacea was the dominant food resource for Lutjanus alexandrei, L. jocu and Bathygobius soporator, whereas Telostei were consumed mainly by Centropomus undecimalis and C. parallelus. In contrast, Polychaeta were preyed upon mainly by Diapterus rhombeus, Eucinostomus argenteus, Sciades herzbergii and S. parkeri. Although most species consumed similar food items, they did that in varying proportions and amounts. Overall, the niche overlap among species was low (< 0.60), but there were several cases where pair of species had their feeding niche highly overlapped (between 0.72 and 0.97). These findings corroborate the hypothesis that food resource partitioning determines species coexistence in estuarine tropical environments. Resumen -La sobreposición alimentaria y la división del alimento fueron estudiados entre nueve especies de peces carnívoros capturados en aguas someras del río Paraíba do Norte, Paraíba, Brasil. Los peces fueron colectados con red de arrastre de playa entre enero y diciembre del 2008. En total, fueron analizados 958 estómagos. Crustacea fue el recurso alimentario dominante para Lutjanus alexandrei, L. jocu y Bathygobius soporator, mientras que Telostei fue consumido principalmente por Centropomus undecimalis y C. parallelus. En contraste, Polychaeta fue predado principalmente por Diapterus rhombeus, Eucinostomus argenteus, Sciades herzbergi y S. parkeri. A pesar de que la mayoría de las especies consuma ítems alimentarios similares, éstos son consumidos en proporciones y cantidades diferentes. En general, la sobreposición del nicho entre las especies fue baja (< 0.60), sin embargo, se observó sobreposición de nicho alimentario para dos especies en varios casos (entre 0.72 y 0.97). Estos resultados corroboran la hipótesis de que el particionamiento de recursos alimentares determina la coexistencia de especies en ambientes tropicales estuarios.

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Section: Discussionsupporting

confidence: 61%

Dietary overlap and food resource partitioning among fish species of a tropical estuary in Northeastern Brazil

Garcia¹,

Vendel²

2016

Gaia Sci.

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“…Este mecanismo foi atribuído a I. labrosus que consome elevada quantidade de larvas de Chironomidae e tem rastros branquiais bem espaçados permitindo a retenção das larvas e a rejeição de matéria inorgânica . Comportamento semelhante foi descrito para o Sciaenidae marinho Umbrina coroides (Cuvier, 1830), espécie bentívora que se alimenta de crustáceos e elimina areia através da boca e rastros branquiais (ZAHORCSAK, et al, 2000).…”

Section: Discussionunclassified

Ecologia alimentar da corvina, Pachyurus bonariensis (Perciformes, Sciaenidae) em duas baías do Pantanal, Mato Grosso, Brasil

Fugi

Hahn

Novakowski

et al. 2007

Iheringia, Sér. Zool.

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ABSTRACT. Feeding ecology ofTo express diet results, were used occurrence and volumetric methods. The individuals consumed expressive amount of Chironomidae and Ephemeroptera larvae, in both bays and periods (dry and wet). Ontogenetic analysis showed that small individuals (Standard length = 1.6 to 7.2 cm) ate mainly Chironomidae, whereas larger ones (Standard length = 13.0 to 18.6 cm) consumed mainly Ephemeroptera. Then it is possible to infer that P. bonariensis is benthic-feeding fish with specialized diet. This characteristic was attributed because its narrow niche breadth allied with position and form of its mouth adapted to feed on the bottom. KEYWORDS.Feeding, fishes, bays, Pantanal. A dieta foi composta essencialmente por larvas bentônicas de Chironomidae e Ephemeroptera, independente do local e período (seca e cheia) analisados. Entretanto, nota-se marcante diferença na composição alimentar de acordo com o tamanho do peixe. Os menores exemplares (comprimento padrão = 1,6 a 7,2 cm) consumiram preferencialmente Chironomidae e os maiores (comprimento padrão = 13,0 a 18,6 cm) Ephemeroptera. Conclui-se que P. bonariensis tem hábito alimentar bentívoro e especializado, devido principalmente ao restrito espectro alimentar aliado à posição e forma da boca adaptada a explorar o substrato. RESUMO. Foi investigada a dieta de Pachyurus bonariensis

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“…of competition for food or to supply physiological needs for migration, sexual maturation and reproduction (BRAGA & BRAGA, 1987;WINEMILLER, 1989). This adaptation may entail a change in the foraging site, from feeding in midwater to feeding at the bottom, during ontogenetic development (ZAHORCSAK et al, 2000). The lack of ontogenetic variation in the general diet, for the three species analyzed, may be related to similarities in foraging strategy and locale used by individuals of all size classes and to the abundance of the food resources (crustaceans), consumed predominantly by fish of all sizes.…”

Section: Discussionmentioning

confidence: 99%

Diet of the ichthyofauna associated with marginal vegetation of a mangrove forest in southeastern Brazil

Corrêa

Uieda

2007

Iheringia, Sér. Zool.

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RESUMO. Dieta da ictiofauna associada à vegetação marginal de um mangue no sudeste do Brasil. O presente trabalho objetivou analisar a dieta das espécies de peixes que utilizam a vegetação do mangue do Rio da Fazenda como local de abrigo e alimentação em um rio do sudeste do Brasil. O trabalho de campo, incluindo coleta e observação subaquática das espécies, foi realizado na estação seca (julho e agosto de 2004) e na chuvosa (fevereiro e março de 2005) com o objetivo de verificar a existência de variação sazonal na dieta. Sete tipos de itens alimentares foram consumidos pelas espécies, dois de origem vegetal e cinco de origem animal. Os crustáceos predominaram na dieta da maioria das espécies, seja na forma de fragmentos não identificados ou discriminados em oito grupos. O predomínio de espécies utilizando essencialmente uma única fonte alimentar (crustáceos, principalmente Ostracoda e Tanaidacea) e a existência de variação sazonal na dieta de algumas espécies ficaram bem evidentes na análise de amplitude do nicho alimentar, com um predomínio de espécies especialistas. No mangue do Rio da Fazenda, a vegetação marginal submersa foi utilizada pela ictiofauna como local de forrageamento e, principalmente, como cobertura para espécies que buscavam alimento no substrato do fundo. Estas espécies podem estar utilizando a vegetação como proteção contra predadores aéreos e aquáticos, ou mesmo contra o arraste no período de mudança das marés. Na área de estudo, a grande diversidade de crustáceos constituiu uma importante fonte de alimento para a maioria das espécies, as quais ajustaram sua dieta em função de variações sazonais na oferta e em função das interações com outras espécies. PALAVRAS-CHAVE.Hábito alimentar, variação sazonal, variação ontogenética, amplitude de nicho.ABSTRACT. The objective of this study was to analyze the diet of fish species that use the mangrove vegetation for shelter and feeding in a river southeastern Brazil. The fieldwork, including collecting and underwater observations, was carried out in the dry (July and August 2004) and in the rainy season (February and March 2005) in order to assess the existence of seasonal variation in the diets. Seven kinds of food items were consumed, two of plant origin and five of animal origin. Crustaceans predominated in the diet of most species, either in the form of unidentified fragments or discriminated in eight groups. The predominance of species using mainly a single food source (crustaceans, principally Ostracoda and Tanaidacea) and the existence of seasonal variation in the diets of some species became very evident in the analysis food niche breadth, with a predominance of dietary specialists. In the Rio da Fazenda mangrove, the submersed marginal vegetation was used by the ichthyofauna as a locale for foraging, and principally as cover by bottom-feeding species. These species may be using the vegetation for protection from aerial and aquatic predators, or even from the pull of the current during the turn of the tide. In the study area, the great div...

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Feeding biology of a guild of benthivorous fishes in a sandy shore on south-eastern Brazilian coast

Cited by 44 publications

References 14 publications

Dietary overlap and food resource partitioning among fish species of a tropical estuary in Northeastern Brazil

Dietary overlap and food resource partitioning among fish species of a tropical estuary in Northeastern Brazil

Ecologia alimentar da corvina, Pachyurus bonariensis (Perciformes, Sciaenidae) em duas baías do Pantanal, Mato Grosso, Brasil

Diet of the ichthyofauna associated with marginal vegetation of a mangrove forest in southeastern Brazil

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