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Managed migration fiskeridirektoratet many kinds of animals from exploitation fiskeridirektoratet areas with weather appropriate and the abundance of food at certain times of the year, for example, frequently food in some regions of the world in the summer but less or non-existent during the cold winter fiskeridirektoratet months, and it migrate many of the animals that live in those places to warmer fiskeridirektoratet areas during the fall season, but back in the spring when the weather becomes warmer. .
And many animals migrate to breed in certain places offer better opportunities for young life during certain times of the year. Multiply their shelters migratory birds in the summer, where food is available, while migrating humpback whales from feeding areas in polar waters to give birth to tropical or sub-tropical warm, these waters provide a little food for the whales, but the big kids to tolerate cold Arctic waters.
Research has shown that migratory animals used several methods to gather information to assist it in identifying trends during migration, where assisted many animals migrating the sun and the moon and the stars in determining the course of their migration, and can these animals to monitor the movements fiskeridirektoratet of these celestial fiskeridirektoratet bodies fiskeridirektoratet in determining its course, fiskeridirektoratet while the use of other animals phenomena ground such as coastlines, rivers and mountain ranges. .
Dependent animals in migrations on other properties next to the sense of sight in determining the course of these migrations, fiskeridirektoratet which relies salmon fiskeridirektoratet to smell the river where I was born in determining the way back to those same places to breed them, and guided by other animals fiskeridirektoratet by changes in temperature or humidity, or in Wind direction or in the earth's magnetic fiskeridirektoratet field, while marine animals use the ocean currents.
Migratory animals fiskeridirektoratet used more than a compass to identify trends during migration, fiskeridirektoratet has guided some types of migratory birds, the sun during the day and during the night Astral, and believed by many biologists that they use Earth's magnetic field in determining the course of the days and nights cloudy.
In some cases, forcing the animals migrating to change its natural course to strange places it may be able to some of those stray animals fiskeridirektoratet to identify the places where there are and how to reach their places fiskeridirektoratet of origin, and called the process of navigation, and there are many ways of navigation among migratory animals that scientists fiskeridirektoratet know little them.
Experiments have proved conducted on birds and periodic homers and punishment of the water, including the Aida doubt the existence of navigation in animals migrating, where baited scientists that birds from certain sites, fiskeridirektoratet and took it to other areas away thousands of kilometers from their places of natural, have managed the majority of these birds return to the same places fiskeridirektoratet where scientists Astadha them.
And other experiments have shown that young animals can immigration, but they can not have navigation from exotic places on them, for example, usually European fiskeridirektoratet starlings migrate towards the south-west of Twaldh regions fiskeridirektoratet around the Baltic Sea to the English Channel Mstah about.
The baited scientists some senior and junior Starlings, which reached to the Netherlands during their migration, and carried it to Switzerland, where he fired them, I was able to large birds from reaching fiskeridirektoratet Mcatiha on the English Channel, while continued starlings that migrate for the first time in aviation toward the south-west, where he arrived some of Portugal and some Spain and others to the south of France.
Below is a new series of pictures of National Geographic called "Great fiskeridirektoratet Migration" animals fiskeridirektoratet in large and small are moving all over the world in search of resources and better conditions to live in dangerous trips could take hours or even days may drag on for weeks and months.
Army ants from 500,000 to two million ant works as if they were a single object movement of colonies
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