Integrative approach detects natural hybridization of sympatric lambaris species and emergence of infertile hybrids.

ABSTRACT: Despite its relevance for ecology, evolution and conservation of species, natural hybridization and hybrids biology are still poorly studied in freshwater fish. Here, we tested the hypothesis that sympatric species Astyanax paranae and A. fasciatus are able to interbreed in the natural environment and presented evidence for the first record of hybridization between these species. We analyzed anatomical traits, gametogenesis, reproductive biology, and genetic variations of the COI and S7 genes of both species and putative hybrids. Intermediate morphometric and meristic features were observed in hybrids when compared to A. paranae and A. fasciatus. Overlap in reproductive season was showed for these species, with greater reproductive activity from August to January, but hybrids did not prese

SUBMITTER: Pinheiro APB 

PROVIDER: S-EPMC6416303 | biostudies-literature | 2019 Mar

REPOSITORIES: biostudies-literature