Ecologia trófica de peixes de riachos

Esteves, Katharina Eichbaum; Aranha, José Marcelo Rocha

doi:10.4257/oeco.1999.0601.05

Cited by 83 publications

(91 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Taylor (1992) Esse amplo espectro alimentar é favorecido pelo ambiente lêntico, como é caracterizada a lagoa. Em ambiente lótico os alimentos disponíveis na coluna da água são menos abundantes como, por exemplo, os microcrustáceos (Luiz et al 1998) e é verificada predominância de dietas de origem alóctone em peixes de riachos (Lowe-McConnell 1999, Esteves & Aranha 1999. Mesmo assim, é possível deduzir que R. pictus é capaz de sobreviver em riachos por explorar recursos alimentares de diferentes extratos da coluna da água, inclusive os do fundo.…”

Section: Resultsunclassified

Plasticidade alimentar em Rivulus pictus Costa (Osteichthtyes, Cyprinodontiformes, Rivulidae) de uma pequena lagoa em Brasília, Distrito Federal, Brasil

Shibatta

Bennemann

2003

Rev. Bras. Zool.

View full text Add to dashboard Cite

Section: Resultsunclassified

Plasticidade alimentar em Rivulus pictus Costa (Osteichthtyes, Cyprinodontiformes, Rivulidae) de uma pequena lagoa em Brasília, Distrito Federal, Brasil

Shibatta

Bennemann

2003

Rev. Bras. Zool.

View full text Add to dashboard Cite

“…Most of the diet studies using species of the genus Deuterodon have been conducted employing only qualitative methods, although the importance of quantitative or semiquantitative abundance estimates has always been emphasized by many authors (e.g., Hyslop, 1980;Esteves & Aranha, 1999). Considering that quantitative analyses of microscopic items are very difficult (e.g., Aranha, 1993), a semi-quantitative analysis of microscopic items was chosen, allowing greater confidence in the final results.…”

Section: Discussionmentioning

confidence: 99%

[No Title Available]

2008

View full text Add to dashboard Cite

Information related to the diet of one species always contributes to the knowledge of its bionomy and the functioning of the ecosystem in which the species lives. Therefore, understanding the feeding ecology of one fish population and its ontogenetic, spatial and temporal aspects help to understand the structure of fish assemblages and river communities. Knowledge of this structure is essential for habitat management and biodiversity conservation. The feeding ecology of Deuterodon langei Travassos, 1957 was studied through analyses of diet composition, sharing of resources, feeding strategy and contribution of food items to the width of its niche. The analysis included an assessment of ontogenetic, spatial and seasonal variations. The species was considered omnivorous with great plasticity caused by seasonal variation in food availability throughout the river basin, but mainly through ontogeny. The diet of smaller individuals revealed a predominance of insects and other arthropods, while the diet of larger specimens showed allochthonous plant items as the main components. The low intestinal quotient (IQ) values for the smaller individuals were accounted for their mainly insectivorous diet. The greater relative length of the intestine can account for the greater plasticity of the adult diet, enabling them to use diet items of larger size and more difficult digestion, such as plant items. Therefore, shifts in feeding ecology during growth are confirmed in this omnivorous tropical river fish, strengthening the concept that, when comparing food habits among species, fish size must be taken into account. This study also provides needed information regarding the feeding ecology of fishes intrinsically associated with the Atlantic rainforest, one of the most threatened and biodiverse ecosystems of the planet.Informações relacionadas à alimentação de uma espécie contribuem para o conhecimento de sua bionomia e funcionamento do ecossistema no qual ela vive. Desta forma, entender a ecologia alimentar de uma população de peixes e seus aspectos ontogenéticos, temporais e espaciais auxiliam na compreensão da assembléia de peixes e de toda a comunidade de um rio. Reconhecer tal estrutura é fundamental para o manejo e conservação da biodiversidade do habitat. A ecologia alimentar de Deuterodon langei Travassos, 1957 foi analisada por meio da composição da dieta, partilha de recursos, estratégia alimentar e contribuição dos itens alimentares para o nicho alimentar. As análises incluem uma abordagem das variações ontogenéticas, espaciais e temporais. A espécie foi considerada onívora com uma grande plasticidade alimentar causada pela variabilidade sazonal na disponibilidade de recursos e ao longo da bacia hidrográfica, mas principalmente ao longo de sua ontogenia. A dieta dos indivíduos menores revelou uma predominância de insetos e outros artrópodes, enquanto nos indivíduos maiores ocorreu um predomínio de vegetais alóctones. Os baixos valores de Quociente Intestinal (IQ) para os indivíduos menores foram associados a uma dieta ...

show abstract

“…Brazilian large rivers and reservoirs had been studied more frequently because of their economic importance for fisheries and power production (ESTEVES & ARANHA 1999). Nevertheless, small-sized rivers and streams share several species with larger ones, being important sites for the reproduction and growth of many aquatic species, especially fishes (BUCKUP 1999).…”

Section: Ecological Conditions and Habitat Diversitymentioning

confidence: 99%

“…The broad variety of BM (26 taxa) among the food items ingested by the studied fish could be related to ontogenetic and individual variations of the species (ESTEVES & ARANHA 1999), to seasonal fluctuations in food availability (PREJS & PREJS 1987, ABELHA et al 2001 and to human activities carried out in the Fish stomach analysis for BM inventory…”

Section: Fish Food Itensmentioning

confidence: 99%

Benthic macroinvertebrate assemblages structure in two headwater streams, south-eastern Brazil

2007

View full text Add to dashboard Cite

From December 2003 to September 2004, benthic macroinvertebrates (BM), fishes, water and sediment were collected quarterly at six stations in two streams of the upper São Francisco River basin, south-eastern Brazil. We evaluated the ecological conditions, habitat diversity, water quality, composition and structure of BM communities, as well as the food habits of the local fish fauna. By applying a protocol for rapid characterization of ecological conditions and habitat diversity, three of the sampled localities were classified as "pristine" while the others stations were considered "altered". A well oxygenated water with near neutral pH and low electric conductivity (< 0.01 mS/cm) and nutrient concentrations (< 0.08 mg/l total P and < 0.90 mg/l total N) was found for both streams. Sediment analysis revealed the dominance of medium, fine and very fine sand fractions in all sampled areas. The organic matter content in the sediment was higher in the lotic and well preserved area. We found 45 BM taxa, and Chironomidae (68%), Oligochaeta (10%) and Elmidae (8.5%) showed the highest abundances. From the stomach contents analysis of 13 fish species, 26 BM taxa were found, including four that were not collected in the sediment samples, being Chironomidae the dominant group (> 60%). Our results show that human activities such as forest clearing, agriculture and cattle rising have altered the habitat diversity in freshwater ecosystems in a process that affects the aquatic biota and thus the food availability to the fish fauna. The results also highlight the importance of the fish stomach contents analysis as a complementary tool in BM inventories.

show abstract

Ecologia trófica de peixes de riachos

Cited by 83 publications

References 0 publications

Plasticidade alimentar em Rivulus pictus Costa (Osteichthtyes, Cyprinodontiformes, Rivulidae) de uma pequena lagoa em Brasília, Distrito Federal, Brasil

Plasticidade alimentar em Rivulus pictus Costa (Osteichthtyes, Cyprinodontiformes, Rivulidae) de uma pequena lagoa em Brasília, Distrito Federal, Brasil

[No Title Available]

Benthic macroinvertebrate assemblages structure in two headwater streams, south-eastern Brazil

Contact Info

Product

Resources

About