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18 novembre 2016

Fungi and the quest for old polyploids [The Molecular Ecologist]

Polyploidy, that curious increase in a species’ number of genomes, is now a well recognized force in the evolutionary history of plants and animals. Those extra genomes are often much more than just extra : having a spare genome or four may help lineages radiate into unexplored niches and colonize harsh environments previously uninhabitable by parental species.

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17 novembre 2016

Les approximations de l’UICN coûtent cher à certaines espèces d’oiseaux [Sciences et Avenir - Animaux]

Selon un article publié dans Sciences Advances, la catégorisation des espèces en danger par l’UICN serait partiellement inexacte. Ainsi la menace qui pèse sur 200 espèces d’oiseaux est gravement sous-estimée.

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17 novembre 2016

Two new lizards with ’heroic past’ discovered in the Chilean Andes [EurekAlert]

Two new species of lizards have been discovered in the Andean highlands of Southern Chile. Collected from areas of heroic past, both small reptiles were named after courages tribal chiefs who have once fought against colonial Spaniards in the Arauco war. The study, conducted by a team of Chilean scientists, is published in the open access journal ZooKeys.

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17 novembre 2016

These 3 new miniature salamanders are already headed for extinction [Mongabay]

From the remote mountains of Oaxaca in Mexico, scientists have described three new species of miniature salamanders that are smaller than a matchstick.
These tiny creatures belong to the elusive genus Thorius, members of which are the smallest four-legged animals on earth, scientists report in a new study published in PeerJ.

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17 novembre 2016

Le développement de l’agriculture par nos ancêtres a modifié le génome des chiens [Sciences et Avenir - Animaux]

Selon une étude parue en novembre 2016, le développement de l’agriculture durant le Néolithique aurait engendré une modification du génome des chiens.

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