2004 Volume 69 Issue 2 Pages 187-190
The present work was conducted to evaluate the effects of Tributilin (TBT) on chromosomes of the Neotropical fish Astyanax sp. Twenty nine individual fishes (8 females and 21males) were divided into two groups. Within 15 fishes in one group, 7 fishes were treated with TBT for 19 d, while other 8 fishes were without, and were sacrificed for the observation. Another 14 fishes (8 for treatment, and 6 as control) were treated for 37d. Chromosomal aberration was detected in both group of treated and of non-treated fishes. However, the frequency of aberration of chromosome was significantry higher in the treated fishes. These data represent the first evidence of the effects of TBT on chromosomes of a Neotropical fish species.
