Publications by authors named "Waldir Miron Berbel-Filho"
Article Synopsis
- Widespread species like the Sailfin molly show significant environmental variations across their natural habitats, which span from Mexico to North Carolina and into central Florida.
- Researchers used genetic analysis, life-history assessments, and environmental measurements to study 18 populations of Sailfin mollies and identified six distinct genetic clusters, indicating population structure and migration patterns.
- While there is strong genetic differentiation and isolation by distance, the presence of migrants between populations suggests human impacts, such as channels created for shipping, may facilitate fish migration despite the lack of cryptic speciation.
Asexual reproduction is ancestral in prokaryotes; the switch to sexuality in eukaryotes is one of the major transitions in the history of life. The study of the maintenance of sex in eukaryotes has raised considerable interest for decades and is still one of evolutionary biology's most prominent question. The observation that many asexual species are of hybrid origin has led some to propose that asexuality in hybrids results from sexual processes being disturbed because of incompatibilities between the two parental species' genomes.
View Article and Find Full Text PDF, a small euryhaline guppy is reported at the Maceió River micro-basin in the Fernando de Noronha oceanic archipelago, northeast Brazil. However, the origin (human-mediated or natural dispersal) of this insular population is still controversial. The present study investigates how this population is phylogenetically related to the surrounding continental populations using the cytochrome oxidase I mitochondrial gene from eleven river basins in South America.
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