Most water bodies in Brazil, and in the world, are contaminated by some types of pollutants, ranging from sewage to metal/chemicals, carcinogenic products, and biodegradable detergents. Despite the extensive knowledge on ...

The Nile tilapia, Oreochromis niloticus (Linnaeus, 1758), uses filter feeding and visual predation to catch prey. In filter feeding, the mucus secreted in their gill rakers traps planktonic organisms. In visual predation, ...

The development of the chub mackerel (Scomber japonicus) first gill-arch was studied from measurements in 18 organisms caught in Bahía Magdalena, B.C.S., México. The graphic analysis shows a relationship between the standard ...

Hemiodus jatuarana, a new species of the Hemiodontidae from Oriximina, rio Trombetas, Amazon Basin, Brazil, is described. The new species can be readily distinguished from its congeners by the presence of a horizontally ...

The methyl cycle is a universal metabolic pathway providing methyl groups for the methylation of nuclei acids and proteins, regulating all aspects of cellular physiology. We have previously shown that methyl cycle inhibition ...

Detritivory is the common freshwater fishes, especially in the Neotropical region, and for many species are scarce information about the digestory tract, as is the case of the species Steindachnerina notonota, in which, ...