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Reserves and Sanctuaries
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Itaipu maintains ten protected areas  in Brazil and Paraguay. These protected areas and the reservoir protection strip , , sum up  almost  100.000 hectares.

They ensure the conservation of animal and plant species threatened by man's predatory action.

Brazil holds the biological sanctuaries Bela Vista (1,920/ha) and Santa Helena (1,482/ha), while Paraguay runs the natural reserves of Tati Yupi (3866 hectares), Pikyry (2866 hectares), Itabó (18293 hectares), Yvyty Rokai (4864 hectares), Limoy (22529 hectares), Pozuelo (5521 hectares), Carapa (4382 hectares), and the Binational Management Natural Reserve Mbaracayu (1436 hectares) .

On the border between the two countries, between the Paraguayan department of Kanendiyu and the Brazilian state of Mato Grosso do Sul, we find the Binational Maracaju Sanctuary (1,356/ha) covering an area under litigation between Brazil and Paraguay.

The Binational Maracaju Sanctuary is undergoing a reforestation process that has already rehabilitated 620 hectares, nearly half of its 1,356 hectare area.

On the site, Itaipu keeps a fire brigade, conducts forest research, and helps surveillance and environmental protection activities.

On the Brazilian side, animal studies take place at the Itaipu Binacional Wild Animal Nursery (Casib) located at the Bela Vista biological sanctuary, near the power plant dam.

There, wild animals reproduce in captivity and are later released on the lake protection strip and biological sanctuaries on the Brazilian side of the reservoir. Casib is capable of housing up to 300 animals.

The center has bred approximately 800 animals of 42 species. Survival rate among baby animals exceeds 70%.

Today, reproduction work is focused on endangered species in Brazil and those rare to the area. Captive reproduction of small felines is one of the highlights at the center.

Researchers from Itaipu, CNPq, Ibama, the Federal University of Paraná and the Curitiba Zoo have reached excellent results in the reproduction of little spotted cats (Leopardus tigrinus), margays (Leopardus wiedii) and ocelots (Leopardus pardalis).

On the Paraguayan side, animal studies take place at the Wild Animal Research Centre (CIASI),  researchers have been achieving great success in the reproduction of Bare-faced curassow (Crax fasciolata), Chacoan peccary (Catagonus wagneri) and marsh deer (Blastocerus dichotomus), all of them endangered species for the country. CIASI’s main purpose is to take care and reproduce genetically valuable animals to enrich wild populations at the protected areas.

Studies conducted since 1986 on the area's wild animals estimate that on the reservoir protection strip, reserves and sanctuaries located on the Brazilian side of the Itaipu lake there are 44 mammal, 305 bird, and 37 reptile species.

 

On the Paraguayan side, where native forest have not been dramatically altered, 62 mammal and 409 bird species have been registered.

In the protected areas, researchers come across with species rare today, like margays (Leopardus wiedii), pygmy brockets (Mazama nana), and king vultures (Sarcoramphus papa).

Read more: Paraguay Biodiversity

"Taken together with the riparian forest of the reservoir, the Itaipu protected areas total over 100,000 hectares."
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