Search results
Results from the WOW.Com Content Network
An earthdog test or earthdog trial tests the working ability and instinct of the small, often short-legged terriers or Dachshunds. [1][2][3] These dogs were bred to hunt vermin and other quarry which lived in underground dens. Earthdog den tests involve human-made tunnels that the dogs must navigate, while scenting a rat, "the quarry".
One of Pavlov’s dogs with a saliva-catch container and tube surgically implanted in its muzzle, Pavlov Museum, 2005. The history of animal testing goes back to the writings of the Ancient Greeks in the 4th and 3rd centuries BCE, with Aristotle (384–322 BCE) and Erasistratus (304–258 BCE) one of the first documented to perform experiments on nonhuman animals. [1]
Ground loop (electricity) In an electrical system, a ground loop or earth loop occurs when two points of a circuit are intended to have the same ground reference potential but instead have a different potential between them. [1] This is typically caused when enough current is flowing in the connection between the two ground points to produce a ...
In this pedigree chart, G is the progeny of C and F, and C is the biological uncle of F. To find the coefficient of inbreeding of G, first locate a loop that leads from G to the common ancestor through one parent and back down to the other parent without going through the same individual twice. There are only two such loops in this chart, as ...
Dog communication is the transfer of information between dogs, as well as between dogs and humans. [135] Communication behaviors of dogs include eye gaze, facial expression, [ 136 ] [ 137 ] vocalization, body posture (including movements of bodies and limbs), and gustatory communication (scents, pheromones, and taste).
Dog breed. Montage showing the morphological variation of the dog. A dog breed is a particular type of dog that was purposefully bred by humans to perform specific tasks, such as herding, hunting, and guarding. Dogs are the most variable mammal on Earth, with artificial selection producing upward of 360 globally recognized breeds. [1]
Dirofilaria immitis, also known as heartworm or dog heartworm, is a parasitic roundworm that is a type of filarial worm, a small thread-like worm, and which causes dirofilariasis. It is spread from host to host through the bites of mosquitoes. Four genera of mosquitoes transmit dirofilariasis, Aedes, Culex, Anopheles, and Mansonia. [2]
Dogs can detect a change in movement that exists in a single diopter of space within their eye. Humans, by comparison, require a change of between 10 and 20 diopters to detect movement. [36] A test has estimated poodles' visual acuity to have a Snellen rating of 20/75, a relatively low score compared to humans' vision. [28]