A composição e a distribuição da ictiofauna de interesse ornamental no estado do Pará

Abstract

The icthyfauna of ornamental interest of the Para State has been studied with focus on the composition and distribution on Para hidrographic regions. It revealed through the invetory of species divided in: Loricariidae (329), followed by the Characidae (139), Cichlidae (133), Callichthyidae (51), Lebiasinidae e Auchenipteridae (22), Pimelodidae (21), Potamotrygonidae and Doradidae (19), Anostomidae and Rivulidae (16) and Crenuchidae and Poeciliidae (10). There were also registered cases of families with less than 10 spp, having been registered a richness of 928 species, belonging to 271 genres and distributed in 47 families and 14 orders. From registered species, 595 species presented taxonomic identifications and registers in the different databases, while 333 species were identified with taxonomic “status” yet undefined. Even with the register of 270 distinct genres, stands out the very elevated richness in 12 genres with numbers above 15 species: Loricariidae with genres Ancistrus (44, 4,74%), Hypancistrus (24, 2,59%), Hypostomus (24, 2,59%), Baryancistrus (23, 2,48%), Pseudacanthicus (22, 2,37%) and Peckoltia (30, 3,23%); Callichtyidae with genres Corydoas (44, 4,74%); Cichlidae with genres Crenicichla (44, 4,74%) and Apistogramma (24, 2,59%); Characidae with genres Moenkhausia (20, 2,16%) and Hyphessobrycon (18, 1,94%) and Potamotrygonidae with genre Potamotrygon (16, 1,72%). Therefore, we define as groups of greater diversification the small and médium “acaris”, “corredoras”, “acaras” e “jacundas”, “tetras” e “arraias”. Even endangered species, being vulnerable or even the critically endagered, are still been clandistinely commercialized in the state. Discussions about lists of species found and permitted and a comparison of the hydrographic regions ichthyofauna of the Para state are presented.