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22 septembre 2017

Even jellyfish get sluggish if they don’t have enough sleep [New Scientist]

Birds do it, bees do it, even enervated fleas do it. Sleep is widely believed to be common to all animals with a central nervous system, but it turns out to be even more ubiquitous than that.
Jellyfish have been found to enter a sleep-like state at night, and become dozy the next day if their rest is interrupted. This is remarkable for an animal with a simple, diffuse nervous system and no centralised brain.

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22 septembre 2017

Important déclin du Moineau domestique à Paris [CORIF - LPO]

Depuis 2003, le Centre ornithologique Île-de-France et la LPO Île-de-France étudient l’évolution de la population de moineaux domestique à Paris.
Quatorze vagues d’observations sur près de 200 points montrent que trois moineaux sur quatre ont disparu du paysage parisien en treize ans.
Avec un retard d’une bonne décennie, les moineaux parisiens subissent le même sort que leurs congénères des autres grandes villes européennes.

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22 septembre 2017

Scientists discover unique Brazilian frogs that are deaf to their own mating calls [The Guardian]

Pumpkin toadlet frogs are only known case of an animal that continues to make a communication signal even after the target audience has lost the ability to hear it.

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21 septembre 2017

Sexual competition among ducks wreaks havoc on penis size [Nature]

When forced to compete for mates, some birds develop longer penises and others almost nothing at all.

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21 septembre 2017

Plants combine color and fragrance to procure pollinators [Phys]

Who knew that it’s possible to predict the fragrance of a flower by looking at its color ?
This is true for many of the 41 insect-pollinated plant species growing in a Phrygana scrubland habitat on the Greek island of Lesbos. An international research team published their findings Sept. 4 in Nature Ecology & Evolution.

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