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5 mai 2017

Colony density, not hormones, triggers honeybee ’puberty’ [Phys]

New research helps answer a long-standing mystery of how honeybees sense the size and strength of their colony, a critical cue for the bees to switch from investing solely in survival to also investing in reproduction.
In a paper published May 3 in the Journal of Experimental Biology, a Cornell-led research group reports on how workers detect that their colony has reached a threshold to invest in a special type of reproductive comb.

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5 mai 2017

Pigeon related to dodo found on Australian mainland for first time [The Guardian]

A rainbow-coloured pigeon native to islands in the Indian and Pacific oceans has been found on the Australian mainland for the first time, by Indigenous rangers working near Broome.

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5 mai 2017

Parasite living inside fish eyeball controls its behaviour [New Scientist]

A common parasite that lives in fish eyeballs seems to be a driver behind the fish’s behaviour, pulling the strings from inside its eyes.
When the parasite is young, it helps its host stay safe from predators. But once the parasite matures, it does everything it can to get that fish eaten by a bird and so continue its life cycle.

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5 mai 2017

Le bruit de l’homme affecte les espèces jusque dans les aires protégées [Le Monde - Biodiversité]

La pollution sonore provoquée par l’homme entraîne des effets en cascade pour l’ensemble des écosystèmes, selon une étude publiée dans la revue « Science ».

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4 mai 2017

Long lost monitor lizard ’re-discovered’ on Papua New Guinean island [Phys]

Scientists have recently found and re-described a monitor lizard species from the island of New Ireland in northern Papua New Guinea. It is the only large-growing animal endemic to the island that has survived until modern times. The lizard, Varanus douarrha, was already discovered in the early 19th century, but the type specimen never reached the museum where it was destined as it appears to have been lost in a shipwreck.

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