A5102989975- Isotope Analysis in Ecology
- Fish biology, ecology, and behavior
- Fish Ecology and Management Studies
- Water Quality and Pollution Assessment
- Aquaculture Nutrition and Growth
- Mercury impact and mitigation studies
- Environmental Sustainability and Education
- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Marine Bivalve and Aquaculture Studies
- Marine animal studies overview
- Diatoms and Algae Research
- Coastal wetland ecosystem dynamics
- Wildlife Ecology and Conservation
- Coastal and Marine Management
- Microbial Community Ecology and Physiology
- Conservation, Biodiversity, and Resource Management
- Environmental Toxicology and Ecotoxicology
- Geography and Environmental Studies
- Physiological and biochemical adaptations
Universidade Estadual de Maringá
2006-2023
Nucleus (Norway)
2023
European Union of Medical Specialists
2003
Abstract Aim Evaluating how groups of organisms vary in dispersal capability and environmental, spatial temporal signals across multiple scales is critical to elucidating metacommunity theory. We examined whether the relative contributions hydrological factors have different effects on organismal with abilities at three scales, this knowledge contributes our understanding dynamics. Location Four major Brazilian floodplains, largest distance among them 2,300 Km. Taxon 10 aquatic groups,...
In this study, diet-tissue discrimination factors and turnover rates were determined from the somatic tissues of a detritivorous fish Prochilodus lineatus. The carbon (Δ(13) C) nitrogen (Δ(15) N) varied for all feed rations with range Δ(13) C values between -1·9 3·6‰ Δ(15) N 3·3 5·7‰. Carbon rate in blood was 23·1 days C3 ration 34·7 C4 ration, liver 9·9 under same (23·1 days) both -C4 rations, 13·9 muscle ration.
In order to verify the carbon source and trophic position of main species fishes, Paraná River floodplain, we analysed proportion stable (delta13C) nitrogen (delta15N) isotopes in muscle fishes sampled rainy season. We analyzed adult individuals Loricariichthys platymetopon, Schizodon borellii, Leporinus lacustris, Auchenipterus osteomystax, Iheringichthys labrosus, friderici, Serrasalmus marginatus. These data were compared with results obtained by analyzing stomach contents. The primary...
Abstract: The Devonian Escarpment (DEEPA), located in the south of Brazil, represents an important area environmental preservation composed by grasslands, gallery forests, as well rock outcrops and archaeological sites. A law project (LP 527/2016), which suggests a reduction DEEPA approximately 70% its original (from 393,579 to 125,895 ha), is currently being processed Paraná State House Representatives. Such seems be related economic interests (mainly agriculture mining) state Paraná. If...
Abstract We investigated whether isotopic niche partitioning could mediate the coexistence between native ( Hoplias sp. B) and non‐native mbigua ) trahira in a Neotropical floodplain. hypothesised that during dry season both species inhabit isolated sites (i.e. lakes) thus rely on distinct food resources to sustain their coexistence. found evidence of trophic segregation among freshwater fish Upper Paraná River, Brazil. Even though same primary littoral carbon sources present similar...
The stable isotopes have been used to obtain the turnover rate in aquatic animals. This is one more tool help making decisions about conservation, considering that anthropic impacts threaten specific areas of food, reproduction and growth species natural ambient. On other hand, aquaculture, knowledge conversion speed food tissue helps better estimate production. Based on that, aim this paper make a revision studies carried out related using isotopes, ecology. consists new synthesis old...
Studies in freshwater ecosystems are seeking to improve understanding of carbon flow food webs and stable isotopes have been influential this work. However, variation isotopic values basal production sources could either be an asset or a hindrance depending on study objectives. We assessed the potential for basin geology local limnological conditions predict nitrogen isotope six at multiple locations four Neotropical floodplain (Paraná, Pantanal, Araguaia, Amazon). Limnological exhibited...
Ontogenetic shifts in food preference reduces intraspecific competition as immature individuals eat different types than adults. This diet plasticity could facilitate species' ability to successfully invade and establish itself a new environment, even when co-occurring with phylogenetically close species. Here, ontogenetic of non-native piranha species (Serrasalmus marginatus) was tested by analyzing the relationship between its body length carbon nitrogen stable isotope signatures. Carbon...
The aim of this work was to determine the caloric density leaves, stems and roots aquatic macrophytes in different environments Baía subsystem (Baía river Fechada Guaraná lagoons) on Upper Paraná floodplain, addition identify variability between ecological groups. Samplings Eichhornia crassipes, Salvinia spp, Pistia stratiotes, azurea, Polygonum sp, Cyperaceae Poaceae were carried out February 2003. Spatial differences densities not observed for these plants. Caloric values varied from...
In order to identify the ontogenetic changes in food items assimilated by larvae of Plagioscion squamosissimus and Hypophthalmus edentatus, we analyzed stomach content nitrogen isotopic value (δ 15N) from larvae. Samplings were performed monthly, October 2002 March 2003, 2003 2004 subbasin Ivinheima River (Upper Paraná floodplain), Mato Grosso do Sul State, Brazil. The P. changed with respect developmental stages. preflexion stage, found a large contribution phytoplankton, followed...
The upper Paraná River floodplain is composed of several marginal lagoons, making it a natural breeding ground for many fish species at developmental stages. aim this study to estimate the trophic positions these fishes based on feed intake (measured via diet) and nitrogen assimilation δ15N). monthly samplings were concentrated during spawning season in Ivinheima River, which located floodplain. specimens grouped into preflexion, flexion postflexion Trophic estimated isotope value diet....
The trophic discrimination factor (TDF) is a key parameter for stable isotope analysis and due to lack of species-specific TDFs, mean universal values have been used, resulting in uncertainties about the position species call more experiments. In this study, we addressed experimental TDFs conducting three experiments 128 days each determine TDF (muscle liver) species, piscivore Pseudoplatystoma corruscans (Spix & Agassiz, 1829), omnivores Piaractus mesopotamicus (Holmberg, 1887) Astyanax...
The present study examined the influence of availability riparian vegetation and C3 emergent aquatic macrophytes on carbon assimilation by Prochilodus lineatus. vegetal cover these producers, available at 30 m bank, for terrestrial ecosystem rivers Baia, Ivinheima Paraná, was quantified with image processing Landsat 5 TM, year 2000, period sampling biological material each river. energy sources (riparian macrophytes, C4 periphyton, phytoplankton) P. lineatus determined analysis stable...
The classification of species in trophic guilds facilitates studies on the ecology interactions. However, large number definitions terms used and overlap has hampered standardization guilds, especially bottom-feeder fishes. In this context, study aimed to quantify, by a scientometrics analysis, research involving fishes which they are classified, discuss for each guild. A survey Scopus Web Knowledge was performed publications were analyzed according type guild, publication year, first author...
Com o objetivo de investigar a concentração mercúrio foram amostradas diferentes categorias tróficas peixes (onívora - Pterodoras granulosus [Siluriformes: Doradidae], detritívora Prochilodus lineatus [Characiformes: Prochilodontidae] e herbívora Schizodon borelli Anastomidae]) importância comercial, na planície inundação do alto rio Paraná, Brasil. As coletas realizadas no período cheia, em três rios da planície: Baía, Ivinhema Paraná. Para determinar as concentrações mercúrio, amostras...