The Nosivolo River is a river in eastern Madagascar and a primary tributary of the Mangoro River. It begins east of Fandriana.Campbell, Gwynn. David Griffiths and the Missionary "History of Madagascar", p. 488–89 (Brill 2012) (citing Aldegheri, Marius. The Rivers and Streams on Madagascar, in Battistini, Rene & G. Richard-Vindard (ed.), Biogeography and Ecology in Madagascar (1972)) The village of Marolambo, capital of the Marolambo District in the Atsinanana region, is located along the river at the junction with the Sandranamby River.
It is an important river in Madagascar due to its biodiversity (including the cichlids Katria katria and Oxylapia polli, and Malagasy rainbowfish), which has spurred efforts to protect it. It was designed the first river Ramsar site in the country in 2010.(20 September 2010). Nosivolo is designated as Madagascar's first riverine Ramsar site, Conservation.org(20 September 2010). Crystal-clear river becomes first in Madagascar to wins Ramsar protected status, WildMadagascar.orgFiche technique du site Ramsar - ‘Rivière Nosivolo et affluents’ Madagascar (2010)(detailed Ramsar report on river)
The primary tributaries of the Nosivolo are the Sandranamby River (which joins near Marolambo), Sahadinta, Manandriana, and Sahanao.
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