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2 novembre 2017

Croaking Science : The Problem of Data Deficiency in Amphibian Conservation [Froglife]

There are currently 7737 recognised species of amphibian and new species are being added to the list each month. This is either due to new species discoveries or as a result of taxonomic revisions where a taxonomic split of one previously recognised species results in several new species. Each species is given an extinction risk by the International Union for the Conservation of Nature (IUCN) which ranges from Extinct through four threatened categories (Extinct in the Wild, Critically Endangered, Endangered and Vulnerable) to Near Threatened, Data Deficient and Not Evaluated (NE).

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30 octobre 2017

Des chercheurs créent un "crayon génomique" pour réécrire les lettres de l’ADN [Sciences & Avenir - Santé]

Des chercheurs ont créé une sorte de "crayon génomique" qui permet de réécrire le génome à la lettre près. Une technique qui serait plus efficace que les fameux ciseaux moléculaires CRISPR-Cas9.

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30 octobre 2017

Quand des poissons carnivores utilisent les glucides [INRA]

En analysant le comportement alimentaire de truites des Iles Kerguelen, des chercheurs de l’Inra ont démontré que ces poissons, carnivores et peu enclins à utiliser des glucides pour favoriser leur croissance, sont pourtant capables de les digérer et les métaboliser. Cette faculté leur a permis de s’adapter aux changements environnementaux, mais aussi de coloniser de nouveaux milieux.

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27 octobre 2017

Why insects can develop from unfertilized egg cells [Phys]

A scientist from the Lomonosov Moscow State University, Faculty of Biology, has, together with his Russian colleague, has explained the frequent occurrence of parthenogenesis development of insects from unfertilized egg cells. Studying this phenomenon could contribute to controlling the species that cause damage to agriculture. The results were published in the Journal of Zoological Systematics and Evolutionary Research.

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27 octobre 2017

Lemur species losing favorite food to climate change, new study says [Mongabay]

Bamboo-eating lemurs in Madagascar could be slowly starving as a changing climate slashes the availability of their favorite part of the plant, a new study shows.

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