Nature dans tous ses états

www.facebook.com/242753169143438/photos/...2457/?type=3&theater

les beaux cygnes!!! des fois on en voit faire escale au stang (comprendre : l'étang), en bas de chez moi, un étang à marée séparé de la rade par un sillon et une écluse. On y voit des hérons cendrés, des aigrettes, des foulques, nos habituels goélands (cendrés et marins) et cormorans, et parfois donc les cygnes plus habitués d'une autre anse de la rade, vers l'île du renard.
Voilà une petite série prise hier après-midi!

et si je me retourne ça donne ça! notre petit cimetière à bateaux, les cales et le petit port, et dans le fond : le Relecq-Kerhuon et Brest!

Merci Gribouille, c'est toujours émouvant ces cimetières à bateaux et à chaque fois mon esprit vagabonde vers d'autres cieux, d'autres mers. Un jour je suis pêcheur de langoustes en Mauritanie, une autre fois je traque le germon dans le golfe de Gascogne ou alors je suis en pleine pêche de belles langoustines sur le banc de porcupine à l'ouest de l'Irlande..... Je m'évade.....

Désolée c'est en anglais mais c'est trop génial. Il y a une vidéo en suivant le lien. On peut aussi écouter le début de la Tête au carré de ce vendredi : www.franceinter.fr/emissions/la-une-de-l...ence-24-fevrier-2017 :
Encore une très belle preuve de l'intelligence des insectes avec des bourdons anglais qui apprennent à jouer au golf et qui transmettent leur apprentissage.

Des chercheurs anglais montrent que les bourdons sont capable d’apprendre et de transmettre très rapidement de nouvelles techniques de nourrissage. Une publication dans la revue Science qui permet de défendre dl'idée d'une proto-culture animale. Nous commentons cette recherche avec Mathieu Lihoreau chargé de recherche CNRS au Centre de Recherche sur la Cognition Animal (CRCA) de Toulouse.

www.theguardian.com/science/2017/feb/23/...ch-other-study-finds

Goal! Bees can learn ball skills from watching each other, study finds

Bees are better at problem solving than previously thought, and can learn tasks totally unlike their natural behaviour, say researchers

Nicola Davis
@NicolaKSDavis

Thursday 23 February 2017 19.00 GMT
Last modified on Thursday 23 February 2017 22.00 GMT

Bumblebees can learn how to manoeuvre a ball just by watching others carry out the task, researchers have discovered in the latest study to shed light on the insects’ surprising talents.

While bees have already been shown to be able to learn how to pull on strings, push caps and even rotate a lever to access food, researchers say the new study shows that bees are better at problem solving than we thought.

“Previous [research] has found that bumblebees can do complex tasks but those tasks have always been really close to natural behaviour,” said Olli Loukola, first author of the research from Queen Mary University of London, pointing out that bees often have to manipulate different parts of a flower to access nectar. “Now we have shown that they can learn something that is totally unnatural, like moving balls.”

In the first part of the study, published in the journal Science, bees were presented with a platform, a yellow ball and a target area containing a concealed reservoir of sucrose.

The bees were repeatedly shown how to manoeuvre the ball over the target area to gain access to the sweet treat by means of fake bee on a stick. They were then tested on their abilities. While 10 bees who were not shown a demonstration almost never managed to succeed in the task, the nine that were all succeeded. What’s more, they improved over test trials, taking less time and shorter paths.

The second experiment involved a platform on which rested three balls at various distances from the centre. Bees were then presented with one of three different training scenarios: a trained bee that moved the furthest ball to the centre, a magnet that could move the furthest ball to the centre, or no training where just one ball was presented and placed in the centre of the platform. The bees were then tested to see if they could accomplish the task of moving one of three balls to the centre to receive a drop of sugar solution.

The results reveal that the bees were on average more successful when trained by other bees than with the magnet and that both were more effective than no training, with success rates of around 99%, 78% and 34% respectively. Intriguingly, unlike the demonstrations, the bees generally chose to move the ball closest to the centre, a result that held even when that ball was black rather than yellow.

“This means that the bees didn’t just simply copy the demonstrator and could improve upon the demonstrator’s technique or strategy,” said Loukola. “The fact that they saw the task in different ways than the demonstrator shows a very impressive amount of cognitive flexibility.”

Paul Graham, an expert in insect navigation from the University of Sussex who was not involved in the research, described the findings as a beautiful example of animal behaviour, but added that it was not clear whether the bees chose the closest ball due to strategic planning or for other reasons.

Nevertheless, says Graham, the study emphasises that bees are adapted to persevere when it comes to accessing food. “[It] is further evidence of social learning and the fact that bees can learn to associate certain actions with reward – both of which reinforce the view that these are smart critters,” he said.

merci pour l'émission France inter : très intéressante en effet et en français pour les intéressés ..

et super la vidéo du gardian ! [/color][/i][/b]

peut être les mêmes créateurs comme les deux îles sont proches...sinon les oiseaux ce n'est pas mon post