A5000580915- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Fish Ecology and Management Studies
- Genetic diversity and population structure
- Identification and Quantification in Food
- Aquaculture disease management and microbiota
- Pesticide Exposure and Toxicity
- Environmental Toxicology and Ecotoxicology
- Genetic and phenotypic traits in livestock
- Carcinogens and Genotoxicity Assessment
- Ichthyology and Marine Biology
Universidade Estadual do Norte do Paraná
2014-2025
University of Guelph
2025
Universidade Estadual de Londrina
2005-2010
Lactation is a challenging life stage for dairy animals, as they need to cope with milk production and, in most cases, simultaneous pregnancy. The dry period between two consecutive lactations can be producer choice, based on, instance, animal performance or physiological requirement when animals off spontaneously. goals of this research were estimate genetic parameters and perform genome-wide association study Saanen goats the capacity skip identify genes QTLs underlying trait. A total 249...
In this study, random amplified polymorphic DNA (RAPD) markers were applied to analyze the genetic diversity of samples Neotropical catfish Hypostomus ancistroides, collected from four sites (S1, S2, S3 and S4) along an urban stream in Southern Brazil. The 11 primers used RAPD analysis 147 loci, 76 (51.7%) which polymorphic. proportions loci observed were: 29.93% (S1), 31.97% (S2), 23.81% (S3) 38.77% (S4). average heterozygosity within sampling localities ranged 0.1230 0.1526 unbiased...
Fourteen polymorphic microsatellite loci were isolated and characterized for the Neotropical cichlid Geophagus brasiliensis tested on 30 individuals belonging to a single population. Among 14 described, four showed potential presence of null alleles, inferred from excess homozygous genotypes, three these significant deviations Hardy–Weinberg equilibrium. Fifty‐nine different alleles detected (ranging two eight per locus), with estimates observed expected heterozygosity ranging 0·167 0·700...
The focus of this work was to survey the ichthyofauna Penacho stream, a tributary Laranjinha River, northeastern Paraná State, in an area Upper River basin still devoid ichthyofaunal studies. In general, banks Stream are predominantly characterized by pasture or agricultural activities and may exhibit little riparian vegetation few stretches. Fishes were collected at eight different locations, from its headwaters mouth, between February 2009 March 2010. A total seven orders, twelve families...
Streams are very important environments for Neotropical freshwater fish fauna, and possess a high number of species. These small drainages also highlighted by their intrinsic biological physicochemical features; however, knowledge on the genetic distribution in these is limited. Therefore, present study, RAPD (random amplified polymorphic DNA) microsatellite markers were used to analyze population differentiation gene flow Astyanax altiparanae Geophagus brasiliensis from three sites (high,...
Abstract: This work is the most comprehensive survey of Laranjinha River´s fishes, a tributary Cinzas River, Paranapanema River basin. Throughout its course, there only low-height dam, including transposition system located 98 km from mouth. The sampling was carried out in nine locations, source to mouth, with six field incursions each location, using different fishing gear. A total 11,924 fish were collected, distributed seven orders, 27 families, and 100 species. representative order...
This study details 13 novel polymorphic microsatellite loci in the armoured catfish Hypostomus ancistroides, and assesses their utility for population genetic studies. The analysis of 30 individuals revealed a total 99 different alleles (ranging from two to 15 per locus), with an average 7·62 locus, observed expected heterozygosities ranging 0·103 0·931 0·102 0·906, respectively. One showed significant deviations Hardy-Weinberg equilibrium, probably due presence null alleles, inferred excess...
ϕ ST min 0.0132 and max 0.0385) demonstrated low, but significant levels of genetic structure.Bayesian analysis assignment found two k clusters, including several individuals with mixed ancestry for all populations from the five species analyzed.These findings along historical data on rainfall low dimensions dam studied here support hypothesis that periodic floods enable transit between different localities mitigating differentiation process populations.
ABSTRACT Data on 15 novel microsatellite loci from the Neotropical fish Bryconamericus aff. iheringii are presented here. Analyses of 32 individuals four different streams revealed 192 alleles, ranging to alleles per locus (mean 12.8 locus). Observed and expected heterozygosities ranged 0.094 0.813 0.205 0.952, respectively. These showed high polymorphic information content will be a resource for genetic studies B. iheringii. Furthermore, several also amplified other small Characidae...
ABSTRACT Brycon nattereri is an endangered Neotropical fish reported along conserved stretches of the upper Paraná, Tocantins and São Francisco rivers. Populations this species have been very rare in some Paraná River sub basins. This study analyzes genetic diversity population structure B. a restricted area occurrence recently identified basin. Seven microsatellite loci 497 bp D-Loop mitochondrial region were examined 92 individuals from four points occurrence. Both molecular markers...
ABSTRACT When a river is dammed, impacts differ according to distance from the dam under consideration, and sites closer are more affected than distant ones. Damming changes flow landscape characteristics, which, in turn, change hydrological, limnological ecological dynamics, such as biological production, species distribution, ecosystem structuring, functioning services. This study evaluates distribution pattern of Siluriformes (catfish) fish near small hydroelectric power plant Jaguariaíva...
In view of the growing global demand for electricity, many countries have been looking ways to diversify production. However, in such as Brazil, hydroelectric power plants still constitute predominant generating source, occupying important drainage systems, Upper Paraná River. At same time, dams are among main sources impacts on freshwater fish, interfering, example, genetic distribution populations. Although could be expected from Small Hydroelectric Plants, very little information has...
Abstract Cnesterodon hypselurus is a small fish that has restricted distribution in southern Brazil, including headwaters of the Tibagi and Itararé river basins (Upper Paraná River). This study reported C. headwater Cinzas River basin, where there were no previous records this species, employed microsatellite loci mitochondrial haplotypes population genetic analysis. A total 57 specimens was analyzed, 30 from 25 basin two basin. Results indicated low diversity levels (HE = 0.334 h 0.246) for...
Abstract In the Neotropics, freshwater streams harbour high fish diversity and are constantly threatened by anthropogenic disturbance. However, there few studies on genetic of populations inhabiting these streams. We aimed to assess, based microsatellite mitochondrial DNA markers, population structure suckermouth catfish, Hypostomus ancistroides, a Neotropical species widely distributed across Upper Paraná River Basin in South America. Twenty-five locations were sampled, 18 sites six...
Abstract Dams are one of the main threats to Neotropical potamodromous fish, causing blockages migratory routes and loss breeding areas in an increasing number drainage systems. In this scenario, current data argue that maintenance free-flowing tributaries along fragmented watersheds would be important strategy fish conservation, both panmixia situations scenarios with different coexisting stocks, as already reported for Prochilodus lineatus. This study analyzed microsatellite loci...
Abstract Fourteen novel microsatellite loci are described and characterized in two species of electric eels, Electrophorus variiand E. voltaifrom floodplains rivers the Amazon rainforest. These polymorphic, highly informative, have capacity to detect reliable levels genetic diversity. Likewise, high combined probability paternity exclusion value low identity obtained demonstrate that new set displays suitability for studies on eels. In addition, cross-amplification eel implies it may also be...
This study comprises the first fish inventory of Água das Araras stream, a small tributary Laranjinha River, in upper Paraná River basin. Four samplings were carried out seasonally between June 2010 and July 2011, 12 collecting sites distributed from headwater to mouth stream its tributaries, using seines gill nets capture specimens. A total 5,328 specimens collected, six orders, 15 families, 33 genera, 41 species. The most representative terms species richness, Siluriformes Characiformes....