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Melo, Sandra Maria de; Takeda, Alice Michiyo; Monkolski, Alexandre

doi:10.1023/a:1015617102463

Cited by 16 publications

(6 citation statements)

References 24 publications

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“…Because of this complexity, these areas contain high diversity and abundance of small-sized fish (Delariva et al 1994;Meschiatti et al 2000;Neiff et al 2009;Dibble and Pelicice 2010;Cunha et al 2011;Gomes et al 2012) which have particular behavior patterns, such as low swimming activity and high exploitation of interstices among the roots (Priyadarshana et al 2001). The habitat provided by macrophytes is favorable for these fish owing to the high availability of food resources like algae and invertebrates (Melo et al 2002;Colon-Gaud et al 2004;Bickel and Closs 2008;Thomaz et al 2008;Murakami et al 2009;Mormul et al 2010;Colares et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variation in the use of food resources by small fishes inhabiting the littoral zone in a Neotropical floodplain lake

et al. 2015

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This study evaluated the effect of seasonality on diet composition and overlap in fish species inhabiting the littoral zone of a small lake. We analyzed whether the way the species exploit food resources may help explain their coexistence. Fish samples were collected in a lake in the Upper Paraná River floodplain in September (dry period) and December (rainy period) of 2010. The diet of six species was evaluated through stomach content analysis, which showed that the most consumed resources were microcrustaceans, aquatic insects, aquatic higher plant and algae. Diet composition was significantly different between periods for all species studied. Diet overlap values were low in both periods, but trophic segregation was even higher in the rainy period, indicating that with greater abundance of food resources, species could exploit preferential resources. Trophic segregation, evidenced by the low overlap values in both periods, indicates the absence of interspecific competition, which may explain the coexistence of these species in the littoral zone of this small lake.

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Section: Introductionmentioning

confidence: 99%

Seasonal variation in the use of food resources by small fishes inhabiting the littoral zone in a Neotropical floodplain lake

et al. 2015

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“…The structural complexity provided by these plants can strongly mediate the competitive and predatory interactions by providing prey refuges, sustaining more diverse communities (Meerhoff et al, 2007;Padial et al, 2009). In addition, submersed structures of macrophytes provide adequate substrate for bacteria, algae and detritus which contribute to increase invertebrate abundance associated to these plants (Junk, 1973;Melo et al, 2002;Rodrigues and Bicudo, 2004;Thomaz et al, 2008;Mormul et al, 2010). As a consequence, fish benefit in such habitats by elevated diversity and quantity of food (Casatti et al, 2003;Pelicice and Agostinho 2006;Kovalenko et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Effects of flooding regime and diel cycle on diet of a small sized fish associated to macrophytes

et al. 2013

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AIM: In this paper we assessed the effects of flooding (low and high water period) on the feeding activity and diet composition of Serrapinus notomelas in patches of the macrophyte Eichhornia azurea in a shallow floodplain lake (upper Paraná River Floodplain, Brazil). We also assessed the variations of diet composition and feeding activity along the diel cycle. METHODS: Traps were used to catch the fish inside of macrophyte patches monthly from June/2007 to May/2008. A total of 1038 stomachs were examined. We assessed the feeding activity with the mean stomach fullness degree method. To summarize and support the results of diet composition in the different periods (low and high water periods) and times (dawn, light period, and dusk), was applied a nonmetric multidimensional scaling (NMS). RESULTS: The feeding activity of S. notomelas did not differ between low and high water periods, but it differed along the diel cycle. The feeding activity was higher during the light period and dusk, at both the low and high water period. The diet composition differed significantly between low and high water periods, and also along the diel cycle. In the low water the diet of S. notomelas was composed mainly by algae and in the high water by Cladocera. Algae were consumed mainly during the light period while Cladocera in dawn and dusk. CONCLUSIONS: Our results indicate that the oscillations in the water level affect the diet composition, but not the feeding activity of S. notomelas. These seasonal changes are probably related to the temporal abundance of food resources, thus, when Cladocera density was low (low water), S. notomelas consumed mainly algae but when Cladocera was more abundant (high water), it became a common food resource.

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“…Absences of A. alphus and T. araponga in both river bottom (Takeda et al, 1997;Takeda and Fujita, 2004) and macrophytes (Melo et al, 2002(Melo et al, , 2004Takeda et al, 2003), can suggest the coming of these nymphs to substrate by drifting in the water column, driven by strong Paraná River flow. Similar conditions were presented by the Ivinhema River, where we also observed a dominance of at least one of these species, A. alphus.…”

Section: Discussionmentioning

confidence: 99%

Effects of food availability and habitat features on the Ephemeroptera species composition at seasonal and spatial scales from neotropical floodplain rivers

Melo¹,

Ragonha

Pinha

et al. 2017

Braz. J. Biol.

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Brazilian floodplains have suffered great changes in their natural characteristics in recent decades, mainly in the flood pulse. The Upper Paraná River floodplain is one of the few places where are found remained areas in which such peculiar characteristics keep reflecting on its high biodiversity. Ephemeroptera nymphs are one of the higher density groups among benthic community, occurring in many water bodies like large rivers and secondary channels. We sought to understand which factors are needed for the species establishment and how much important is the species colonization, especially in environments with anthropogenic changes. The marginal areas, which are more structured with presence of macrophytes, showed the highest density and richness even in the Paraná River that has great human impact. We verified dominance of Americabaetis alphus, Tricorythopsis araponga, Tricorythopsis artigas on the Parana River, correlated with transparency, depth and electric conductivity, while the dominance of Traverella sp. was correlated with water temperature, especially in marginal areas. Consequently, the increasing transparency and electric conductivity due to the Porto Primavera dam in Parana River can be favoring those Ephemeroptera species. We demonstrated the importance of preserving the wetlands of Ivinhema River State Park mainly for Guajirolus sp., which was only registered in this region. Therefore, our study provides support for understanding gaps from previously studies using artificial substrates in three large rivers which are of great importance to the upper Paraná River floodplain.Keywords: zoobenthos, insect nymphs, colonization, biodiversity, richness.Efeitos da disponibilidade de alimento e características do habitat sobre a composição de espécies de Ephemeroptera nas escalas sazonal e espacial de rios de planície neotropicais ResumoMuitas planícies de inundação brasileiras vêm sofrendo enormes alterações em suas características naturais nas últimas décadas, principalmente no pulso de inundação. A planície de inundação do alto rio Paraná é um dos poucos lugares onde ainda há áreas nas quais essas características peculiares se mantêm, o que reflete em sua alta biodiversidade. Dentre a comunidade zoobentônica, Ephemeroptera é um dos grupos com maior densidade, ocorrendo em diversos corpos aquáticos como rios de grande porte e canais secundários. Nós buscamos compreender quais fatores são necessários para o estabelecimento das espécies e o quão importante é a colonização dessas espécies, principalmente em ambientes com modificações antrópicas. As áreas marginais mais estruturadas com presença de macrófitas apresentaram altas densidade e riqueza mesmo no rio Paraná que apresenta grande impacto antrópico. Verificamos que as dominâncias de Americabaetis alphus, Tricorythopsis araponga e Tricorythopsis artigas no rio Paraná foram correlacionadas com maiores valores de transparência, profundidade e condutividade, enquanto que a dominância de Traverella sp. foi correlacionada com temperatura, principal...

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Untitled

Cited by 16 publications

References 24 publications

Seasonal variation in the use of food resources by small fishes inhabiting the littoral zone in a Neotropical floodplain lake

Seasonal variation in the use of food resources by small fishes inhabiting the littoral zone in a Neotropical floodplain lake

Effects of flooding regime and diel cycle on diet of a small sized fish associated to macrophytes

Effects of food availability and habitat features on the Ephemeroptera species composition at seasonal and spatial scales from neotropical floodplain rivers

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