Threats and efforts for conservation in the Madeira basin: Solutions pass through scientists, citizens and traditional populations.
In the heart of the Amazon, the Madeira River is the river with the largest number of known fish species in the world. This great diversity of fishing resources makes an important role both in the economy and in local food security, being the main source of animal protein for the riverine population that lives along of this river. Among this ichthyic richness, the most diverse migrations can be observed, but one in particular stands out: that of Brachyplatystoma rousseauxii, a catfish popularly known as “Dourada”. This species breeds in the headwaters of the Amazon and Madeira rivers, close to the Andes Mountain range, its juveniles then migrate to the estuarine region of the Lower Amazon, and after growing for approximately 2 years in the Central Amazon, the adults return to the headland to reproduce. In addition to this incredible migratory journey, studies on otolith microchemistry confirmed the famous homing behavior (reported for some species of Salmon and eels) for this catfish. That is, the Dourada, even after migrating a spectacular 5,500 km to the estuary, returns to the same river where it was born, making up more than 11,000 km at the end of this journey. Without a doubt the largest migration entirely within freshwater ever described for a species of fish. But unfortunately, this fantastic life cycle has been interrupted on the Madeira River by the construction of dams. Considering the close relationship between the community, local fishermen and the Amazon ichthyofauna, in particular, the importance of these actors in the conservation and preservation of fisheries resources, the ichthyology and fisheries laboratory, will hold two events (through models, games, and recreational activities) to raise awareness of the importance of preserving the connectivity of rivers for the maintenance of migratory species, which are closely associated with the health and diversity of Amazonian rivers.
Online Event - No
Country - Brazil
Name of contact person - Marília Hauser