Abstract The principle and the techniques applied in DNA extraction play a pivotal role obtention of purified genetic material. present study investigates efficiency eight protocols Hypostomus commersoni, an essential component South American freshwater ichthyofauna. quality samples was assessed through spectrophotometry, gel electrophoresis, PCR-RAPD markers amplification. influenced both by m...

This study aimed to estimate the parameters of length-weight relationship, sex ratio, and diet three freshwater fish species that inhabit streams in Pomba River basin (Rio de Janeiro, Brazil). Fishes were sampled with seine nets (2.0 × 1.20 m, 2 mm mesh size) dip (0.46 0.33 from October December 2018. Measurements taken for total length (TL - 0.1 cm precision) weight (TW 0.01 g precision). Grow...

A new subfamily, Delturinae, is described to accommodate the loricariid catfish genera Delturus Egenmann & Eigenmann, 1889 and Hemipsilichthys Eigenmann & Eigenmann, 1889, a clade recently demonstrated to be the sister group of all remaining loricariids except Lithogenes . The genus Hemipsilichthys is restricted to three species, H. gobio (Lütken, 1874), its sister species H. papillatus Pereira...