The use of model organisms is important for basic and applied sciences. Several laboratory
species of fishes are used to develop advanced technologies, such as the zebrafish (Danio …

Tropical river basins have experienced dramatically increased hydropower development
over the last 20 years. These alterations have the potential to cause changes in hydrologic …

Climate change is now recognized as a reality and along with human pressures such as
river fragmentation by dams, amplifies the threats to freshwater ecosystems and their …

Natural river flow provides the conditions required to sustain freshwater ecosystems, and the
greater the departure from the natural regime, the greater the loss of those ecosystems. In …

The pacu Piaractus mesopotamicus is an omnivorous fish considered a promising species
for aquaculture. Little is known about the endocrine regulation of feeding in this species. In …

Many frugivorous animals act simultaneously as seed predators and dispersers, and shifts in
the abundance and mean phenotype of the frugivore population can alter the prevalence of …

Seminal characteristics in teleost fish with an annual reproductive period, such as pacu
(Piaractus mesopotamicus), may vary during the breeding season. The sperm formed before …

We studied the reproductive biology of Astyanax lacustris in the southern Pantanal, Brazil. A
total of 382 fish were analyzed from February 2009 to January 2011. The sex ratio differed …

The diets of frugivorous animals result from the interaction between feeding preference and
ecological factors such as availability of alternative resources and interactions with other …

No presente estudo é descrita a biologia reprodutiva de uma população de Astyanax
henseli Melo & Buckup, 2006 do curso superior do rio dos Sinos, Caraá, Rio Grande do Sul …