A5047449837- Fish Ecology and Management Studies
- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Ecology and Vegetation Dynamics Studies
- Water Quality and Pollution Assessment
- Aquatic Ecosystems and Biodiversity
- Aquatic Invertebrate Ecology and Behavior
- Species Distribution and Climate Change
- Marine and coastal ecosystems
- Rangeland and Wildlife Management
- Plant and animal studies
- Microplastics and Plastic Pollution
- Hydrology and Sediment Transport Processes
- Wildlife Ecology and Conservation
- Isotope Analysis in Ecology
Universidade Estadual de Maringá
2015-2025
<title>Abstract</title> Organism body size influences ecosystem services, and human pressures alter the structure of ecological communities. Our understanding how different human-induced (such as land-use biotic invasion) interact to drive community services remains limited. Combining 21 years fish spectrum data fishery potential (fishery monetary value), we demonstrate that exponent native species became more negative over time, indicating a relative decrease in biomass large versus small...
The Neotropical region hosts 4225 freshwater fish species, ranking first among the world's most diverse regions for fishes. Our NEOTROPICAL FRESHWATER FISHES data set is to produce a large-scale inventory, covering entire from Mexico and Caribbean in north southern limits Argentina, Paraguay, Chile, Uruguay. We compiled 185,787 distribution records, with unique georeferenced coordinates, represented by occurrence abundance data. number of species numerous orders are as follows: Characiformes...
Abstract Hydrological connectivity interferes directly in dispersal rates of organisms and similarity environmental conditions among floodplain environments. Consequently, promotes changes food resources availability to fish. Here we tested the predictions that (a) isolated lakes have greater heterogeneity than connected lakes, (b) fish diet differs more (c) trophic niche breadth species is smaller lakes. We used one invertivorous algivorous test these two last predictions. The (evaluated...
Abstract Populations of generalist fish can be composed individuals specialised to a small subset food resources, process known as individual specialisation. In this study, we hypothesised that variation in the diet and morphology is related habitat complexity greater levels specialisation are found at intermediate macrophyte biomass. Fish aquatic plants were sampled 15 multispecific stands with different biomasses Baía River (Upper Paraná floodplain). We assessed using biomass macrophytes...
Abstract Fish community structure is affected by a range of lake characteristics, including the cover macrophytes that provide spawning habitats, nursery area, refuge against predators, and food. We assessed fish–macrophyte relationships at both point scale using an extensive dataset from 88 Danish shallow lakes (maximum depth ≤4.5 m). At scale, we used mean values fish macrophyte samples for all lakes, in total samples. The data were derived multiple points each (in 595 samples) where...
Abstract Habitat complexity is recognized to mediate predator–prey relationships by offering refuge or not. We investigated the availability of planktonic microcrustaceans and diet a planktivorous fish (Hyphessobrycon eques) at different levels (low, intermediate high) aquatic macrophyte biomass. Sampling was carried out in river with low flow speed, located Neotropical floodplain. collected stands variations There were no differences microcrustacean density water among biomass, but richness...
An intensively debated issue in ecology is whether the variations biodiversity patterns of different biological groups are congruent space and time. In addition, ecologists have recognized necessity accounting for both taxonomic functional facets when analysing spatial temporal congruence patterns. This study aimed to determine how cross-taxon beta diversity varies across time, using data from four floodplains at a continental scale. Our general hypothesis was that between aquatic groups,...
Abstract The hydrological regime leads to fluctuations in the availability of food resources for fish, which may reflect their diet variation. Our main goal was analyze relationship between water-level and body condition Trachelyopterus galeatus Upper Paraná River floodplain. fish used study were sampled quarterly along nine years, at sampling stations. results showed that T. varied response oscillations hydrometric level, with consumption terrestrial invertebrates being positively related...
Aquatic macrophytes are generally recognized to influence fish–prey interactions. We assessed how fish consume particular foods, and their foraging efficiency, trophic niche breadth, overlap respond gradients of macrophyte density diversity. sampled in 30 stands distributed over a 13.7 km stretch the littoral zone river Brazil. By generating generalized linear models, we showed that increasing (from 366 7066 g DW m−3) favored herbivory efficiency. Beta regressions reduced breadth along...
Abstract Invasive macrophytes usually increase the homogenisation of habitats and can affect local communities with negative effects on food chain. We evaluated experimentally composition, density, richness diversity invertebrates in invasive macrophyte Hydrilla verticillata assessed potential this diet foraging efficiency small native fishes. The Egeria najas was used as control, since it has very similar physical structure complexity to H. . Macrophytes both species were maintained...
Abstract Assessing how organisms interact is fundamental to understand biodiversity patterns. Like many ecosystems, most freshwater environments are susceptible spatial and temporal variations, especially floodplains. In spite of the expected variability, structure interactions in food webs a paramount aspect uncover processes related ecosystem functioning. Here, we surveyed four large floodplains identify biological groups that protagonists across different webs. We used limnological data...
Good water quality is essential for human activities, including recreation, supply, agriculture, industry, and maintenance of biodiversity. However, the high demand resources has led to a reduction in availability water. Hence, objective study was make synthesis knowledge about floodplain located basin with highest population concentration Brazil (Upper Paraná River floodplain), which influenced by different anthropogenic impacts. We performed literature search on Google Scholar, Scopus Web...
Morphological similarity, resource sharing, and differences in habitat use by species are factors that favor their coexistence. The objective of this study was to test possible ecomorphology diet composition two Heptapterids (Imparfinis mirini Cetopsorhamdia iherengi) identify patterns related use. Samplings were carried out ten streams Southern Brazil 123 individuals caught. A total 21 ecomorphological indices calculated for each individual the volumetric occurrence methods used quantify...