Publications by authors named "Paola Palacios-Barreto"
Article Synopsis
- The study examines the genetic diversity and distribution of the endangered bonnethead shark, Sphyrna tiburo, in the western Atlantic, revealing it consists of three independent lineages, particularly distinguishing a unique Brazilian cluster.
- Researchers utilized mitochondrial sequences and Bayesian analyses to trace the evolutionary history and dispersal of S. tiburo, suggesting it originated in the northern region and spread southward due to geological changes over the last 5 million years.
- Findings indicate that environmental factors like ocean currents and freshwater discharge (especially from the Amazon-Orinoco Plume) played significant roles in the diversification and genetic structuring of the bonnethead shark populations.
Characterization of the complete mitochondrial genome of the brazilian cownose ray Rhinoptera brasiliensis (Myliobatiformes, Rhinopteridae) in the western Atlantic and its phylogenetic implications.
Mol Biol Rep
May 2023
Background: The Brazilian cownose ray, Rhinoptera brasiliensis has undergone a global population reduction and is currently classified by IUCN as Vulnerable. This species is sometimes confused with Rhinoptera bonasus, the only external diagnostic characteristic to distinguish between both species is the number of rows of tooth plates. Both cownose rays overlap geographically from Rio de Janeiro to the western North Atlantic.
View Article and Find Full Text PDFThe genus Rhinoptera is composed of eight species widely distributed in tropical, subtropical and temperate coastal waters, which inhabit bays, estuaries and river mouths. Cownose ray Rhinoptera bonasus has been reported to inhabit the Western Atlantic including the Gulf of Mexico and the Caribbean, whereas the Brazilian cownose ray R. brasiliensis has been considered endemic to the coast of Brazil.
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