The pet trade is known to be one of the most important pathways of aquatic non-native
species introduction and Indonesia is a significant trade partner. Popular ornamental South …

Habitat transitions are key potential explanations for why some lineages have diversified
and others have not—from Anolis lizards to Darwin's finches. The ecological ramifications of …

Determining the extinction risk of poorly known species is difficult, as data on both their
biological traits and the threats to which they are exposed are often not available …

Evolutionary transitions between marine and freshwater ecosystems have occurred
repeatedly throughout the phylogenetic history of fishes. The theory of ecological opportunity …

Instances of convergent or parallel evolution provide a potent model system for exploring
contingency and determinism in evolutionary biology. Likewise, the multiple, independent …

Guyana, located in northern South America north of Brazil between Venezuela and
Suriname, includes portions of the Orinoco, Amazon, and Courantyne river basins, a …

The evaluation of hematological and plasma biochemical parameters and the subsequent
establishment of reference intervals facilitate the diagnosis of the health status of animals …

Multiple paternity (MP) is a phenomenon observed for more than 30 elasmobranch species.
The Batoidea is more specious than the Selachii, but only three studies of MP have been …

De quase 1300 espécies de Chondrichthyes atualmente conhecidas, 13, 4% ocorrem no
Brasil em ambientes marinhos e de água doce, sendo que mais da metade está ameaçada …

Neotropical freshwater stingrays (subfamily Potamotrygoninae) are carnivorous bottom
feeder batoids widely distributed in most river basins of South America. They represent the …