[Molecular techniques for cyanobacteria detection at Riogrande II and La Fe water reservoirs, Colombia].

In lentic water bodies as reservoirs occur eutrophication processes, originated mainly from human activities (i.e. agriculture, animal exploitation).

[Genetic variability of Brycon henni (Characiformes: Characidae) in the middle basin of Nare and Guatapé Rivers, Magdalena River system, Colombia].

Brycon henni is a native species in Magdalena's River basin, and because of its cultural and economic importance, is strongly overexploited. This study aimed to describe the genetic variability and population structure of this species from Nare and Guatapé rivers basins. A total of 195 individuals were collected and DNA extractions were obtained from muscle and blood tissue.