We all know that DOG is a man's best four-legged friend.
But have you ever wondered, when and how it happened, and since when its origins date back? These and some other questions, I will look back on, in this post.
DOGS are found in distant prehistoric in the Stone Age as evidenced by the oldest skeletons of DOGS, found 12,000 years ago. Therefore, we can say that DOG is the first animal species that was domesticated by man - before sheep, cattle, pigs, or ducks.
However, the real story of the development of DOG as an animal species begins 50 million years ago, with the appearance of carnivorous mammals from the order of the beast.
They were carnivorous myacides with short legs and long bodies, as we find today in wolves and weasels. Their upper jaw had 2 strong tusks, 6 small incisors, and 6 molars, the lower also, plus 8 front teeth.
The DOMESTIC DOG (Canis familiaris) also developed from them, and together with the wolf, coyote, jackal, and fox, they belong to the Canidae family, which appeared 25-30 million years ago. Today we find them on all continents except Antarctica.
DOGS evolved during the Oligocene period (34-23 million years ago) in the area of present-day North America from animal size and fox-like.
There are several theories about the origin of DOGS. Thus Darwin assumes that DOG evolved from wolves, coyotes, and various species of jackals, while the famous modern zoologist, Norad Konrad Lorenz believes that some BREEDS of DOGS evolved from wolves and others from golden jackals. He later modified that theory, saying that DOG is actually a descendant of the Asian wolf species.
At the forefront of modern science is the theory that DOGS evolved by domesticating the wolf.
DOGS are thought to be descended from jackals in the south and from WOLVES in the north. Its closest relatives are the common wolf, jackal, prairie wolf, and Australian DOG (dingo).
We come across the first connections between man and wolf with the appearance of homo sapiens 40 thousand years ago, while the DOMESTIC DOG appears 12-15 thousand years ago. The relationship between man and DOG was fully established at the end of the Ice Age 10,000 years ago.
Here's how it all went. Man has domesticated the wolf, isolating it in conditions different from its natural habitat, which has influenced the development of new genetic traits of the wolf — those similar to today’s DOMESTIC DOG.
Opinions that dominate are that the domestication of DOG began in different areas of the globe, as evidenced by the existence of different BREEDS from the very beginning of breeding, and climatic and geographical conditions have played an important role in this development.
Thus, in the area of Europe, South Asia, and Australia the BREEDS were developed which are probably the descendants of the little wolf from West Asia (Canis lupus Arabs), while in China the first DOGS developed from the small Chinese DOG. It's assumed that the Eskimo BREEDS, descendants of the North American wolf. By crossbreeding and selection, new BREEDS have developed, and each of these BREEDS has further developed to lead to other, new BREEDS, etc. All these BREEDS have been bred by man.
There are 358 BREEDS of DOGS in the world today. They differ in: physique, mental abilities, color and length of fur, temperament, visual and auditory abilities, etc.
They can be divided into 5 groups:
1.VERY LARGE (from 45 kg and more)
2.LARGE (26 kg-44 kg)
3.MEDIUM (11 kg-25 kg)
4.SMALL (5 kg-10 kg) )
5.VERY SMALL DOGS (up to 4 kg).
Except for the zoological classification, there is one based on their practical application: HUNTING DOGS (SETTER, POINTER, SPANIEL ...), SHEPHERD DOGS AND GUARDS (ST. BERNARD DOG, BERN MOUNTAIN DOG, GERMAN SHEPHERD ...), LUXURY DOGS (SPITZ, PEKINGESE DOG, MALTESE DOG ...).
In the end, we can conclude that DOG has always and in all periods of civilization played an important role for men and the development of industry in the early 19th century "imposed" on him the popular "title" of PET, which he still proudly carries.
THIS POST WAS ORIGINALY POSTED IN "WORLD OF CATS AND DOGS BLOG" AND THE LINK TO THE BLOG IS:
"We take care of our pets as for ourselves."