Among ray-finned fishes that provide parental care, many spawn in constructed nests,
ranging from bowls, burrows and ridges to nests made of algae or bubbles. Because a nest …

Invasive species threaten native taxa with extirpation and extinction via several biological
mechanisms. One such mechanism, hybridization and subsequent introgression of invasive …

Both time and low gene flow are the key factors by which different biological species arise.
The divergence process among lineages and the development of pre-or postzygotic …

Sexual selection is most often thought of as acting on organismal traits, such as size or color.
However, individuals' habitat use may also affect mating success. Here, we show that, in …

The genus Hypophthalmus encompasses four valid South American freshwater catfish
species: H. marginatus, H. edentatus, H. fimbriatus, and H. oremaculatus. More recently two …

Intraspecific niche differentiation can contribute to population persistence in changing
environments. Following declines in large predatory fish, eutrophication, and climate …

Tropidacris Scudder, 1869 is a genus widely distributed throughout the Neotropical region
where speciation was probably promoted by forest reduction during the glacial and …

Benthic and limnetic threespine stickleback (Gasterosteus aculeatus) are a classic example
of ecological speciation. Behavioural and armour divergence between these species has …

Migration occurs in most fishes at certain stages of their life, be it for food or for reproduction.
Anadromous fishes live most of their lives at sea and come into inland water bodies of lower …

Biotic interactions among species are thought to be important for the generation of
phenotypic diversity. Intraguild predation is a common ecological interaction that occurs …