Regulatory News


The Center for Biosciences at the Federal University of Rio Grande do Norte has research that delves deeper into the study on the acoustic variation of the estuarine dolphin living in Baía Formosa, on the southern coast of the Brazilian northeastern state. The work was done between February and May last year, on a group of 60 to 90 members of the species that inhabit the region.

The researchers found that the sound emitted by the dolphins varies not only according to factors such as size and age of the dolphin, but also because of the presence of vessels, other animals and even sea currents. Data was compared with information obtained on aquatic mammal species in other regions of Brazil and in Costa Rica and Venezuela. The study concluded that the whistles of the Rio Grande do Norte porpoises are more similar to those living on the coast of Rio de Janeiro than those who living nearer on the coastline.

© 2007 CRE Brazil - All Rights Reserved.