a play that is the evolutionary drama is performed. In this play, new characters (which would be the introduced species) can enter the scene. If there is a small change in the script, the consequences can be negligible, but when the new character alters the scene so much that it changes to the stage in which it is represented (the environment), the actors with less role (the native species) they become extinct. It is then when it is spoken of invasion. The fish expert from the UCM explains that during the second half of the 20th century the construction of large dams transformed the rivers of the peninsula. In this new scenario, river fisheries managers introduced new species such as pike or largemouth bass, “most of them large and predatory; We put the fox in the henhouse for our fish ”.
The introduction of exotic species Burkina Faso Email List has important environmental, socioeconomic and health consequences, although the latter are hardly appreciated in the case of freshwater fish, the zoologist indicates. For example, since 1949 the royal variety of carp was introduced in large numbers, “a profound alteration species of the river ecosystem”, according to Elvira. Carp change the physics of the water, making it cloudy and damaging the vegetation. Thus, in the Zóñar lagoon (Córdoba), due to the lack of water transparency, the species of diving ducks disappeared when they could not find their food. With this new scenario, a dance of species took place: cormorants and herons arrived, and diving ducks disappeared. “I don’t know what the new fishing model should be, but why do we have to stick with the one from the middle of the 20th century?
Those managers did what they thought was best, but now we have to develop a new model and reach a consensus ”, the expert maintains. Elvira advocates turning to sustainable development and thus turning around a recreational fishing activity based on exotic species that endangers the natural environment and biodiversity.Scientists from the Institute of Evolutionary Biology ( IBE ), a joint center of Pompeu Fabra University ( UPF ) and the Higher Council for Scientific Research ( CSIC ), have discovered a new type of currently extinct hominid that lived in South-East Asia. This species, not described to date, is an ancestor of humans like Neanderthals or Denisovans and interbred with modern humans tens of thousands of years ago. The results are published today in the journal Nature Genetics and confirm