Thank you, Darrell for your comment, you are right. Indeed, in Rio Xingu actually lives Heros efasciatus
Heckel, 1840. I only took those cichlids from this article (and here is the mistake on page 141
! - Heros severus
- Mauricio Camargo, Tommaso Giarrizzo & Victoria Isaac (2004): REVIEW OF THE GEOGRAPHIC DISTRIBUTION OF FISH FAUNA OF THE XINGU RIVER BASIN, BRAZIL - ECOTROPICA 10: 123–147, 2004 © Society for Tropical Ecologyhttp://www.gtoe.de/public_html/publicat ... 202004.pdf
"Of all Brazil’s regions, the Amazonian biome has suffered most from political turmoil."
"The Xingu River basin is a classic example of “unplanned development”.
"Fish fauna diversity.
In the Xingu River basin 467 fish species, belonging to 14 orders and 47 families, were identified (Appendix 1). (Cichlidae -(57 species))"
"Current knowledge on the biodiversity of the Xingu River fish fauna shows that more efforts should be deployed to provide data on the estimated 600 species (Camargo et al. 2002) that have not yet been properly studied. We have a detailed knowledge of the main channel fish fauna, but studies in small Xingu tributaries are rare.""Despite great collection efforts in some areas of the Xingu basin, little is known about the fish fauna of small tributaries, which are surely important contributors to the expected diversity."
Critics say the Belo Monte plant will be hugely inefficient, generating less than 10% of its capacity during the three to four months of the year when water levels are low.
Change in habit, producing change of function, is the main cause of the production of change in living structure. F. Wood Jones (1953) Trends of life