Dogs

The dog is unmammifère descanidés family servant, and close duloup durenard. Formerly grouped in a separate species, known as Scientific Canis canis familiaris or Canis, sonorigine is actually believed to be distinct [1], [2]. By default, the scientists bring together all desraces of dogs in a group called Canis lupus familiaris, a subspecies of Canis lupus, to which also belong to other subspecies as leloup gray. Domesticated dogs devenusmarrons have created their own homogeneous group, which are considered as subspecies of Canis lupus, for example lesdingos Lechien and singer.

There are nombreusesraces dogs. About three-quarters of those recognized are very old and from natural selection on morphology, combined with artificial selection on behavior (examples: Siberian Husky, Berger de Brie). The last quarter came from a recent artificial selection (examples: German Shepherd, Golden Retriever); they are often modeled as the most popular at the convenience of man. Some dog breeds were created from crosses in the past. Today, so that a dog can be called a pure breed by law in countries governed by laFédération Cynologique Internationale (including North America and Europe), it must be recorded in studbook of the country of birth. Without these records, a dog, although they appear to belong to a race, could have crosses in her pedigree and should therefore be considered as such by law [3], [4].

It is also a designation for several other species of canids typeAtelocynus etSpeothos or derongeurs of genreCynomys (prairie dog).