New information on bird migration were revealed by an international team of scientists, which confirmed that the Arctic tern travels more than 70 000 km (migratory routes revealed by the study are between 59 500-81 600 km) during his trip annual migration from one pole to another.
Scientists from British Antarctic Survey (BAS), Greenland, Denmark, the United States and Iceland, mapped the migration of this bird by using location-based miniaturized devices. Weighing only 1.4 g this highly specialized unit has been developed specifically for tracking animal migrations. Already used on other animals such as albatrosses, penguins and seals, they recorded regularly light intensity, which is then used to generate two geographical positions per day.
This study confirms that the Arctic tern makes the longest annual migration in the world, from Greenland to the Weddell Sea in Antarctica, before returning again in its northern breeding areas. The birds studied have not traveled immediately to the south, but spent nearly a month at sea in the middle of the North Atlantic Ocean about 1000 km north of the Azores. After the stopover, the birds continued their long journey south via the coast of northwest Africa. But it is in the vicinity of the Cape Verde Islands, that the behavior of birds surprised the research team. Indeed, while about half of the birds went down at the coast of Africa, the other half crossed the Atlantic to follow a route parallel to the coast of South America.
All birds studied have spent the winter in Antarctic waters. Interestingly their long journey home, the birds did not choose the shortest route to their breeding grounds in Greenland. Instead, the Arctic Terns have taken a route different from the go, S-shaped across the Atlantic Ocean, a detour of several thousand kilometers, but made twice as fast by taking full advantage of the systems World of prevailing winds to reduce energy costs.
The analysis shows that the birds' behavior is highly correlated with the biological and physical parameters encountered along the migration path. They stopped in their migration south to spend time in highly productive waters in the middle of the Atlantic Ocean.
Text translated into French from the official version of the British Antarctic Survey.
it's really interesting !!!!!!!!!!!!
Hi Samuel,
We have questions to ask you about the journey of Arctic terns:
* How are the terns to eat during the trip?
* How many days will they migrate?
* Why is it that the terns were arrested in the Atlantic Ocean? Is it to let the babies grow up before the big trip?
* What are the terns in Antarctica to the Arctic if they are babies?
Samuel Bye!
Small polar explorers
Hello,
are exactly those questions that I asked three days ago to co-author of the study, I am still waiting the answer. However, I can tell you about some things, for food, terns that eat mainly fish, fish in the sea during their voyage.
In fact these birds breed during the Arctic summer, and leave the area because the winter conditions (cold, wind, lack of food, ice ...) are difficult. When it is winter in the Arctic, the only place where they found the same climate in the north is in the Antarctic, that's why they come here.
See you soon!
Paradisaea!
When I read that, I was stuck, as they say ... if just it does not stick.
So I weigh about one hundred grams. I offer two summer seasons in the same year: the northern summer hemisphere Arctic and Antarctic Southern hemisphere, and that for twenty years.
With my coefficient of air penetration unmatched, I escape from the carbon tax. My CO2 emissions are a Copenhagen summit as they have made a mountain. Surely I hold the record for distance traveled in the animal world. I am ...?
Every summer, I lays an egg in the Arctic, then I leave for the Antarctic and, hang on, I'll be back in the same year. Eight months in flight. 70,000 kms of average approved. Researchers are finally realizing that I do not take the most direct line, especially for the return. Energy saving volatile with us: and where are you at your fossil? Commonly known as the sea swallow, I? The Arctic Tern.
That's an airhead, another sparrow singer has in his entire cockpit of a supersonic technology to locate, all the silent power, economic, non polluting to move, makes three times the distance Earth-Moon during his life, and ... Well I, I'm Scotch, and the dry land.
The Arctic Tern connects one half of the globe to another as easily as I can do, half side of my brain prior to the other. Hemispheres. Hemispheres!
Frankly, I Bet I boot. The sense of wonder. The wonder, the only engine of mobilization for saving the planet, much more effective than some soothing speeches, now on sale, market stalls on the environment.
Wonderful nature that offers me the Arctic tern.
Come on, I throw out ballast: the people who oppress me, the future worries me, the border of my papers. I empty the attic of my cluttered hemispheres. Caress those of my battered globe. Deep breath in spite of the state of my lungs. Forget the time of my appointment. Take the wings on my neck. You said Stern. My pet name? Paradisaea .... Come on!
Note: this text is the ticket radio by Pierre WHITE on January 26, 10 FCR Isere
Here are some additions to this article after receiving a response from one of the authors of this study:
- The path of the southward migration lasts about 40 days and 93 for the rise towards the north.
- The Arctic terns go into effect in the Weddell Sea in Antarctica because it is during the austral summer and that this area of the world's richest in terms of food. They go for there krill.
Samuel
I just know its respiratory organs and respiratory behavior especially thank you in advance
cordially. Haider Mahamane 5th class college Denis Diderot massy 91 300 Ile de France
What is particularly respiratory behavior?
Bsr
I discovered your site tonight, so ....
I was in Amsterdam in 1996 I received the paths of Argos and the Amsterdam albatross as MTO and the cards one day with my colleague we had fun MTO has ben overlay maps and not at all Scientologists that were We have seen that almost 48 hours before their return trips of fishing (A + 2000km) they anticipated or depressions and they expected they pass or they plunged in the right direction of the wind (time, memory) to allow driven by a storm and could win up to 48 hours for the small ravito.
And yet they look good cons on the ground; "))
Here voilou
Hi Samuel,
My name is Basil, I ans.Je 11 carries out work for the end of my sixth primary, I chose the
theme of migration. Can you tell me if there is a site or book that describes the timeline of the annual movement of the tern?
thank you in advance.
Hello Basile,
it is a good broad, beautiful and exciting topic that you chose! It's enough to say ...
Unfortunately I have no paper in French about it, just scientific publication in English, I can send it to you if you want.
Samuel
I agree that you send me this document, my mom and dad will help me to translate. I look impatience.Un big thank you for your help.