Dog

 

 

Taiwan 2009
Initially, the Labrador retriever was bred as a working dog, helping fishermen from Labrador to haul nets, fetch ropes, and retrieve fish from the chilly North Atlantic. Today, it is a popular family dog. – During a Taiwanese Daoist festival, dedicated to the Mother Goddess Mazu, pilgrims often walk for days, from temple to temple. This Labrador, joining his master, is well equipped for the journey. (Photo copyright © by Kaj Halberg)

 

 

The origin of the domestic dog is a complicated matter. DNA evidence indicates that the dog (Canis lupus familiaris), the modern grey wolf (C. l. lupus), as well as the now extinct Taimyr wolf (C. l. cf. lupus), all diverged from a now extinct wolf that once lived in Europe. The dog and the present grey wolf form two sister clades, and modern wolves are not very closely related to the wolves that were first domesticated.

According to some archaeologists, the first burial of dogs along with humans took place c. 14,700 years ago, while others maintain that it took place long before that, namely c. 36,000 years ago. Under all circumstances, the archaeological evidence shows that the first wolves were domesticated by hunter-gatherers, being the first domesticated animal of all. This domestication took place at different localities simultaneously, probably in Western Europe, Central Asia, and East Asia. New genetic research points out that an initial wolf population split into East and West Eurasian groups, both of which, before going extinct, were domesticated independently into two distinct dog populations, between 14,000 and 6,400 years ago. The Western Eurasian dog population was partially replaced by East Asian dogs, introduced by humans at least 6,400 years ago. (Sources, see en.wikipedia.org/wiki/Origin_of_the_domestic_dog).

Two types of dogs, which descended from the ancestral dog, are so different from other dogs that they have been given subspecific status: the Australian Dingo (C. l. dingo) and the African Basenji (C. l. basenji). They differ from other dogs in that they cannot bark, and they come into oestrus only once a year, as opposed to twice or more annually in other dogs. They also both lack a distinctive body odour. Genetic evidence indicates that the Dingo originated from East Asian domestic dogs. It was introduced to Australia about 4,000 years ago by seafaring tribes, and today feral populations live in most of the continent, barred from access to the south-eastern part of the country by a so-called ‘dingo fence’. Today, it is the largest terrestrial predator in Australia, as the indigenous thylacine, or Tasmanian wolf (Thylacinus cynocephalus), was extirpated by farmers in the 1900s. Dingoes are often a threat to livestock, but at the same time they benefit farmers, as they mainly prey on rabbits, kangaroos, and rats – three major pests in Australian farming.

The Basenji is said to have originated in the Congo Basin in West Africa. Dogs, resembling modern Basenjis are depicted in Egyptian tombs, sitting with pricked ears and tightly curled tails, just as they do today. Dogs of this type were originally kept in Egypt for hunting small game. (Dollman, 1937)

Through their long relationship with humans, dogs have become uniquely attuned to human behaviour, and they are able to thrive on a starch-rich diet that would be inadequate for wild members of the dog family. At least 200 dog breeds are known, varying immensely in size, shape, and colours, from the 300-pound English mastiff to the Chihuahua, which weighs only 1-2 kilograms. Dogs are utilized in countless activities, ranging from companionship and protection to hunting, herding, racing, pulling sledges, rescuing, assisting police and customs, and aiding handicapped people, to mention but a few. No wonder, the dog has been given the sobriquet ‘man’s best friend’.

 

 

Dogs 01a
Phylogenetic tree of extant grey wolf populations, with divergence times calculated, using an assumed mutation rate of Lindblad-Toh, 2005 (1×10−8, shown in blue), and Skoglund, 2015 (0.4×10−8, shown in green, in brackets). (Illustration borrowed from en.wikipedia.org/wiki/Origin_of_the_domestic_dog)

 

 

Skandinavien 2001-14
Initially, the domestic dog was utilized by Neolithic people during hunting, and possibly also during warfare. This Bronze Age rock carving may depict men in battle, accompanied by dogs. – Fossum, Bohuslän, Sweden. (Photo copyright © by Kaj Halberg)

 

 

Nordindien 1991
The gestation period of dogs varies between 58 and 68 days, depending on size. Pups can be weaned after app. 8 weeks, but pups of stray dogs, like this one in Jodhpur, Rajasthan, India, probably suckle much longer, if their mother allows them. (Photo copyright © by Kaj Halberg)

 

 

Jylland 1996-99
Usually, dogs and cats are sworn enemies, but if they grow up together, like this cat and wire-haired dachshund, they can be the best of friends. (Photo copyright © by Kaj Halberg)

 

 

Bangkok 2005-07
Well-dressed dog, sleeping on a sidewalk, Bangkok, Thailand. I don’t know what its owner has been thinking, because the temperature was around 30o Centigrade! The snout is just protruding to the left. (Photo copyright © by Kaj Halberg)

 

 

Guatemala 1998
In the wake of the deadly 1998-hurricane Mitch, huge amounts of rain fell in Central America between October 29 and November 3 – unofficial reports say 1,900 millimetres. This picture from Todos Santos, Guatemala, taken on October 30, shows a drenched dog, smeared in mud. (Photo copyright © by Kaj Halberg)

 

 

Myanmar 2007
Dogs, enjoying the evening sun on a bench, Bagan, Myanmar. (Photo copyright © by Kaj Halberg)

 

 

Sydasien 1982-83
During the Hindu festival Dipávali, or Tihar (popularly called ’Festival of Lamps’), which lasts five days, the second day, Kukur Puja, is dedicated to the dog, as it is the servant of the god of death, Yama, guiding the souls of the dead to him for judgement. A red tika mark is placed on the forehead of the dog, and a malla (a garland of marigolds) is draped around its neck. The dog is worshipped with incense, whereupon huge amounts of food are presented to it, before the family itself eat breakfast. – Sauraha, southern Nepal. (Photo copyright © by Kaj Halberg)

 

 

 

Lahaul-Ladakh 2014
By September, this herding dog, living near Lake Tso Kar, Ladakh, India, had still not shed its fur from the previous winter, giving it a rather ragged appearance. (Photo copyright © by Kaj Halberg)

 

 

Bali 2009
These girls, dressed in their finery for a dancing performance at a Hindu temple festival near Ubud, Bali, Indonesia, are inspected by a dog. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2014a
This miniature pinscher in Taitung, Taiwan, is warmly dressed as a protection against the ‘winter cold’. The temperature was around 17o Centigrade! (Photo copyright © by Kaj Halberg)

 

 

Jylland 1996-99
Sleeping wire-haired dachshund pup, 3 weeks old. This short-legged breed comes in three forms: smooth-coated, long-haired, and wire-haired. The dachshund was developed to chase foxes and badgers out of their dens, for the hunter to shoot them. In America, they have also been used to chase prairie dogs out of their dens. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2018c
This smooth-coated dachshund is so lazy that it doesn’t even bother to raise its head to bark at me. – Taichung, Taiwan. (Photo copyright © by Kaj Halberg)

 

 

Bornholm 2016a
The St. Bernard dog is a famous rescue dog of enormous size, originating in the western part of the Alps, around the Great and Little St. Bernard Passes. – This St. Bernard dog is peeping through a hole in a hoarding, Bornholm, Denmark. (Photo copyright © by Kaj Halberg)

 

 

Guizhou 2009
This dog in Guiyang, Guizhou Province, China, may have some Tibetan spaniel genes, and probably also some Pekingese, due to its very prominent lower jaw. (Photo copyright © by Kaj Halberg)

 

 

Sydindien 2000-01
Doberman pinschers, about one year old, Mysore, Karnataka, India. This breed originated in Germany, developed around 1890. If well trained, they can become loving family dogs, but on the other hand, there has been a number of incidents, in which Dobermans were mauling children. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2014a
I asked the owner of this little terrier in Taichung, Taiwan, why it was wearing sunglasses. She said that it was to prevent the dog from getting cataract. (Photo copyright © by Kaj Halberg)

 

 

Nepal 2013
Tibetan mastiff, guarding outside a road-side restaurant, Trisuli Valley, central Nepal. This large dog breed was developed by Tibetan herders to protect their sheep and goats from being attacked by various predators, such as snow leopards and wolves. (Photo copyright © by Kaj Halberg)

 

 

Taiwan 2014
Pup of Taiwan dog, or Takasago dog, c. 10 weeks old, Taichung, Taiwan. During Chinese New Year, a red scarf has been tied around its neck, with a red envelope fastened to it, on which is written ‘Wang-Wang’. The red envelope and the text both denote well-wishing. At the same time, ‘wang-wang’ is an imitation of a dog’s barking. (Photo copyright © by Kaj Halberg)

 

 

Jylland 1991-95
The Samoyed originated among nomadic Samoyed people in Siberia, to pull sledges and to help herding reindeer. Today, it is a very popular family dog in the West. (Photo copyright © by Kaj Halberg)

 

 

Guizhou 2009
The Chinese pug is known to be a sociable and loving companion dog. As its name implies, it was developed in China, but it arrived in Europe as early as the 16th Century. – This picture is from Guiyang, Guizhou Province, China. (Photo copyright © by Kaj Halberg)

 

 

References
Dollman, G. (1937). The Basenji Dog. Journal of the Royal African Society 36 (143): 148-149
Lindblad-Toh, K. et al. (2005). Genome sequence, comparative analysis and haplotype structure of the domestic dog. Nature 438 (7069): 803-819
Skoglund, P. (2015). Ancient wolf genome reveals an early divergence of domestic dog ancestors and admixture into high-latitude breeds. Current Biology 25 (11): 1515-9

 

 

More pictures of members of the dog family are found on this website, see Gallery – Animals: Dogs.

 

 

(Uploaded September 2017)

 

(Revised March 2018)