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Dogs in the United States have significant popularity and status, which has been acknowledged by a number of observers. Dogs are treated as family members. Currently, the American Kennel Club is the largest registry of pure breed dogs across the world. ==History== Some of the earliest archaeological traces of the existence of dogs in the United States can be dated back to 9,000 to 35,000 years ago. It is generally held that dogs came to America after crossing from Siberia to Alaska, and it was during this period that the domestication of dogs began in America. The sequence divergence in this clade proposes that dogs originated about 100,000 years ago. Prior to the modern dog, the dire wolf, known as Canis dirus, occupied North America alongside its evolutionary predecessor, Canis lupus. Both grey wolves, Canis lupus the smaller of the two, are believed to have coexisted for 400,000 years, including the time period at which humans first entered the continent. The earliest example of Canis lupus is the Himalayan wolf, native to Kashmir, Himachal Pradesh (Indian states), Nepal and Tibet. This particular Himalayan wolf is considered to have originated 800,000 years ago. These early traces, along with others in Eurasia, show a wide habitat for Canis lupus. However, the dire wolf's habitat was more limited by 10,000 B.C.E., ranging from southern Alberta to Peru before a host of factors accelerated its decline. One of the better recorded events is an estimate of at least 1,646 dire wolves having died at the Rancho La Brea tar pits in southern California. These pits, centers of asphalt accumulation for 25,000 years, are known to have decoyed thousands of animals, quite commonly dire wolves. Information suggests that dire wolf populations were significant around 10,000 B.C.E, but had nearly disappeared by 8,500 years ago. The most recent incidences of the departed canidae are from the western United States in 7500 B.C.E., long after humans crossed the Bering Strait. A variety of American dog breeds are noted to have been mixed with Spanish and French dog breeds. The European idea of registering dog breeds and breed clubs led to the foundation of Kennel Club in Great Britain in 1873. The American Kennel Club, prevalent in The United States, was highly influenced by this European predecessor. Currently, The American Kennel Club is the largest purebred dog registry, and registers more than 1 million dogs each year. The kennel club also organizes events for purebred dogs. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dogs in the United States」の詳細全文を読む スポンサード リンク
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