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8 mai 2017

Birds choose their neighbours based on personality [Phys]

Birds of a feather nest together, according to a new study which has found that male great tits (Parus major) choose neighbours with similar personalities to their own.
Oxford University researchers investigated whether the personality of birds influences their social lives – in particular who they choose to nest near. The study involved analysing social network structure in a population of wild great tits at Wytham Woods, Oxfordshire, over six consecutive breeding seasons.

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5 mai 2017

Les plantes absorbent toujours plus de CO2 [Sciences et Avenir - Nature & Environnement]

La photosynthèse des plantes a augmenté de 30% au cours du XXe siècle. C’est la première fois que l’on évalue à grande échelle la réponse du couvert végétal à l’augmentation de dioxyde de carbone dans l’atmosphère.

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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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