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Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. It is found in all major animal groups, including birds , mammals , fish , reptiles , amphibians, insects , and crustaceans .
Wildebeest migrating in the Serengeti. Migration, in ecology, is the large-scale movement of members of a species to a different environment.Migration is a natural behavior and component of the life cycle of many species of mobile organisms, not limited to animals, though animal migration is the best known type.
A catt of the Bakhtiari people, Chaharmahal and Bakhtiari Province, Iran Global map of pastoralism, its origins and historical development [1]. Pastoralism is a form of animal husbandry where domesticated animals (known as "livestock") are released onto large vegetated outdoor lands for grazing, historically by nomadic people who moved around with their herds. [2]
Migration generally takes place within the political boundaries of a single state these days. Each of the peripatetic communities is multilingual, it speaks one or more of the languages spoken by the local sedentary populations, and, additionally, within each group, a separate dialect or language is spoken.
Alongside the transportation innovations of globalization, the spread of biological technology has allowed the world to enter a new global economy. Because agriculture is such a huge economic sector it is large portion of the economy, and a large portion of that is the production of wheat in the last few centuries. Technically wheat is an ...
Since animals are higher on the food chain, pastoralism supports a thinner population than agriculture. Pastoralism predominates where low rainfall makes farming impractical. Full pastoralism required the Secondary products revolution when animals began to be used for wool, milk, riding and traction as well as meat. Where grass is poor herds ...
In China, where much less animal power was required, it was not necessary to maintain the mixed arable-pasture economy typical of Europe: fallows could be reduced and the arable area expanded, and a considerably larger population could be supported than on the same amount of land in Europe. [14] —
[244] [245] Linnaeus founded an early branch of ecology that he called the economy of nature. [244] His works influenced Charles Darwin, who adopted Linnaeus' phrase on the economy or polity of nature in The Origin of Species. [229] Linnaeus was the first to frame the balance of nature as a testable hypothesis. Haeckel, who admired Darwin's ...