What is migration? Migration is the movement of individuals or groups from one region to another. Migration is typical of several animal groups, such as birds, fish, mammals, insects, etc., and it occurs in response to certain needs. What does

Human-induced climate change is causing a dangerous and generalized perturbation in nature and it is affecting the life of billions of people worldwide. The people and ecosystems with a lower capacity to deal with this situation are the most affected

Migratory freshwater fish, such as trouts, salmons or Amazon catfishes, have decreased their populations by 76% worldwide and 93% in Europe during the last fifty years as a result of habitat fragmentation, overfishing, climate change and pollution. These are the

Being 2.5 m long and weighting up to 130 kg, the wels catfish (Silurus glanis) is one of the most invasive exotic species in our rivers. This fish, without demanding high water quality, came from central Europe to the Iberian