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Vie et mort de la manne blanche des riverains de la Saône

Abstract : While allochthonous species of insects multiply and become invasive during hot spells, some traditionally prolific invertebrates associated with lowland rivers are now vanishing. Little is known about why. The fact that people come to watch and exploit mass mayfly emergences shows the level of interest in them: these swarms can be seen as spectacular, or aberrant and invasive. The insects’ emergence from the water as a multitude of winged adults is called the “manne blanche,” or “white manna, a phenomenon that fishers and locals who harvest the manna along the Greater Saône know well. Their sudden proliferation is expected but occurs at irregular intervals. When it does not occur, it forces people to raise questions about the development of the Saône River and the environmental impact of their actions.
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Submitted on : Monday, January 3, 2011 - 10:21:31 AM
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  • HAL Id : halshs-00549716, version 1


Nicolas Césard. Vie et mort de la manne blanche des riverains de la Saône. Études rurales, Éditions de l'École pratique des hautes études, 2010, janvier-juin 2010 (185), pp.83-98. ⟨halshs-00549716⟩



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