Fish are animals present in a wide variety of habitats and are distributed all over the world. The diversity of forms, behaviors and niches associated with the evolutionary characteristics of these animals make them important ...

Fertility is directly related to oocyte developmental competence. In this context, oocyte mitochondria play a crucial role and have become an important target in assisted reproduction therapies. However, the molecular ...

Orchid bees (Apidae, Euglossini) are important Neotropical pollinators. Two main features characterize these species: the tongue, which reaches at least half the body length, enabling the search for food resources in ...

Anastrepha is a species-rich genus, with a geographic distribution that covers tropical and subtropical regions of the Americas. Twenty-one species groups have been recognized in this genus, the most economically relevant ...

Astyanax fasciatus is characterized as a cytogenetically diverse species. Sympatric and syntopic occurrence of distinct cytotypes corroborates the hypothesis that A. fasciatus might represent a species complex sharing a ...

Pimelodidae comprises 114 valid species, whith few of them are cytogenetically characterized, mainly, especially with respect to molecular cytogenetics. In addition, the species taxonomic delimitation is still very imprecise ...

The analysis of demographic and genetic data is recommended for the success of conservation programs. The integration of this information to generate guidelines for establishing self-sustaining populations and retain the ...

Dourado (Salminus brasiliensis Cuvier, 1816) is an excellent migratory fish, possessing large body and wide distribution in South America, with presence in Paraná, Uruguay, Paraguay and La Plata River Basins (Argentina, ...

To remain competitive in the market of meat production, it is crucial that the Brazilian producer is aware of the criteria used by consumers for local and international markets. One factor that determines the beef quality ...

The network of South American rivers network has experienced deep changes during Late Miocene through Pleistocene, including major marine transgressions, Andean uplift driving drainage changes, and changes in eustatic ...