▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

Genetic tests are located in China the first dogs

Investigadores suecos han encontrado nuevas pruebas de que el origen de la variedad de lobo ancestro de los perros domésticos se localiza en el Southeast Asia. These results go against the theories that place the canine cradle in the Middle East.

El doctor Peter Savolainen, researcher in evolutionary genetics at the Royal Institute of Technology (KTH), concludes in a new study published this Wednesday that an Asian region south of the Yangtze River was the main place, and probably unique, where were wolves first domesticated by man.

Data on genetics, morphology and behavior clearly show that dogs are descended from wolves, but there has never been a scientific consensus on where in the world the domestication process began. “Our Y-chromosome DNA analysis confirms that wolves were first domesticated south of the Yangtze River, in southern China or Southeast Asia, what you called region ASY”, says Savolainen.


Chromosome data and support the prior evidence of mitochondrial DNA. “As a whole, the two studies provide strong evidence that dogs originated in this region”, says Savolainen.

Los datos arqueológicos y un estudio genético publicado recientemente en la revista Nature sugerían que los perros se originaron en Oriente Medio. But Savolainen rejects that view. “Since none of these studies includes signs of the ASY region, ASY evidence has been overlooked”, says.

Peter Savolainen and Mattias Oskarsson doctoral student worked with Chinese colleagues to discuss the male DNA of dogs around the world. Su estudio ha sido publicado en la revista científica Heredity.

Approximately half of the genetic reserve is shared universally around the world, mientras que sólo la región ASY tenía toda la gama de diversidad genética. “This shows that the gene pools of all other regions of the world probably originate in the region ASY”, says Savolainen.

Source: europapress

▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

Sociocognitivo of canine behavior resembles that of a small child

comportamiento sociocognitivo

A new study says that dogs not only capture the words we say, but also our intention to communicate with them, as published by the researchers in 'Current Biology'. These findings could help explain why so many people treat their furry friends as if they were children., the receptivity of the dogs for communication is surprisingly similar to the responsiveness of young children, say scientists.

“The increase of the evidence supports the idea that human beings and dogs share some social skills; the sociocognitivo of canine behavior, for example, It resembles a child of between 6 months and 2 years of age, in many ways”, says József Topál, of the Hungarian Academy of Sciences, who adds that “the use of ostensible signals is one of these characteristics: dogs, as well as human babies, they are sensitive to the signals that indicate the communicative intention”. These signals include oral care and eye contact, although it is not yet clear whether dogs use similar pathways in the brain for signal processing..

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▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

10 of the things you shouldn't do with your pet.

The relationship between a person and your pet can be absurd and sometimes petty. Even activities seemingly innocent as push a cat in a buggy or put bonds in the hair of a dog can be a cruel torture for the animal.

Here they are 10 of the things that owners likes to do with their pets.

Vestir a tu mascota

Dress up your pet

Today's pet owners are obsessed with dressing their dogs and cats in ridiculous suits and ...

Put duct tape on his legs.

Pets bear a great deal of humiliation, but one of the most humiliating things that the owners ...
Inconvenientes de despertar mascotas

Inconvenientes de despertar mascotas

Contenido Los Inconvenientes de Despertar a Nuestras Mascotas: Respetando su Sueño y Bienestar Despertar a nuestras queridas mascotas puede parecer ...

Make fun of them

Some pet owners have a habit of making fun of their dogs and cats with toys and goodies. You can enjoy ...
Gatos: libertad vs correa

Cats: freedom vs leash

Contenido Los Inconvenientes de Colocar una Correa a Nuestros Gatos: Una Reflexión sobre la Libertad Felina La práctica de colocar ...
Hacerlos bailar

Make them dance

No animal likes to dance. Many owners find it funny to dance around their pets by putting them in ...
Los Inconvenientes de pintar las uñas a tus mascotas

The Disadvantages of Painting Your Pets' Nails

The Disadvantages of Painting Your Pets' Nails: Una Práctica Cuestionable Pintar las uñas de las mascotas puede parecer ...
Pasearlos en cochecitos y bolsos

Walk them in strollers and bags

Content "La Absurda Tendencia de Pasear a Nuestras Mascotas en Cochecitos y Bolsos: Una Crítica Reflexiva" In the modern era, ...

Hang your embarrassing moments on YouTube

Pet owners get a lot of entertainment from seeing their dogs and cats every day., ...
Capturando el glamour de nuestras mascotas

Capturing the glamor of our pets

Capturando el Glamour de Nuestras Mascotas: Consejos para Fotografías Inolvidables Las mascotas ocupan un lugar especial en nuestros corazones y ...

▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

Put duct tape on his legs.

Pets bear a great deal of humiliation, but one of the most humiliating things that owners love to do is put the tape in their legs.

It seems funny to see cats and dogs twist and adhere to the ground with each step that give. This joke, seemingly innocent, It is frankly a torture for the animal.

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▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

Make fun of them

Ultimate Dog Tease

Some pet owners have a habit of making fun of their dogs and cats with toys and goodies.

You can enjoy watching your dog looking for without rest a ball you never tiraste, but this kind of jokes can make it unstable and make him an aggressive and disobedient animal.

▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

Intelligence of dogs
Performed by Stanley Coren

Classification of dogs according to their functional and obedience intelligence

Of 1 to 10: The 10 races with functional intelligence and highest obedience. Less than five exercises to understand orders new. Ability to remember without the need to repeatedly practice tests. They respond to the first order the 95 % of the times at least. They have a rapid response even at a distance. They learn to properly being trained by coaches relatively inexperienced.

Border Collie
Border Collie

Of 11 to 26: Excellent working dogs. Learning of simple orders between 5 and 15 repetitions of the exercise. Remember easily but do improve with practice. They respond to the first order on the 85 % of the times. For more complex orders need more time. Possibly at some distance from the owner takes a little to respond. Virtually all coaches can obtain good results.

Pembroke Welsh Corgi
Pembroke Welsh Corgi

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▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

Vision of the dog

visión canina

Its rango de campo visual es más amplio que el de los humanos pero ve menos detalles, towards what the dog is the background of vision is therefore “short-sighted” that distinguishes details them you very fuzzy because they see in shades of gray and certain ranges of colours but these gradations are indistinguishable at a distance.

This type of vision and the increased importance of the other senses in the dog because his predecessors were crepuscular hunters and in light conditions the sight was inefficient, therefore they had to be guided more by smell and hearing. From this it is concluded that the canine visual system is designed to be efficient under low light conditions in contrast to the human that was designed to work in broad daylight.

The canine visual system is perfectly capable of working adapting to a wide range of light conditions., its visual in conditions of low light ability helps him as a predator, since if he could not see very well in twilight conditions he would not be able to hunt his prey, the amount of light a dog needs to see is far less than a human needs.

The retina del ojo canino está compuesta principalmente por fotorreceptores en forma de bastones, These photoreceptors work very well in low light conditions, They also have a limited amount of photoreceptors in cone-shaped working in good lighting conditions. These cones are responsible for in human color vision because the human eye contains large amount of cones and fewer sticks, exactly to the setback that in dogs therefore the vision of these is not in colors completely.

The visión nocturna o crepuscular de los canes es ayudada también por el uso del tapetum lucidum que asemeja a una pantalla reflectiva localizada por detrás de los fotorreceptores, This membrane is what makes shine the eyes of dogs when light reaches them in the dark, this membrane acts as a kind of light amplifier and makes the photoreceptors work as if there were a greater amount of light. This membrane is located in the upper half of the retina, the lower part is called tepetum nigrum and is composed of dark pigments not refractory, These two parts are the dog to have good vision in conditions of low light or with a very bright sky or light conditions which reflect very clearly (Sea, desert, etc).In Rod photoreceptors are responsible for the detection of movement and the shadows which is more difficult to do in cone photoreceptors.

The visión del perro por lo tanto está muy bien preparada para detectar movimientos a distancias superiores a los 850 m, But if the same object is still only can differentiate it into one smaller distance range (less than the 550 m).
The visual field of dogs varies to some degree depending on the breed due to the particular shape of the skull., position of the eyes and shape and position of the nose.


The campo visual promedio de un perro se encuentra entre los 240 – 250 degrees, much larger than the human that is only 180 degrees. Is this difference in the visual field dogs detected movements to its around us still by his side can not perceive, This visual field is wider than sideways in the dog but turn the dog sees far less detail than the human.The depth of the visual field, as already said, It is directly related to the cranial structure, therefore it differs according to the race and the type of skull.

The profundidad promedio del campo visual en los perros va de los 30 to the 60 degrees, much smaller than the human that is in 140 degrees through its binocular vision.This shallow in the visual field of the dog makes you cannot very well measured distances far away and allows you to distinguish detail at certain distances, nor are they working in the accommodation of the visual and just focus can carry it out with placed objects between the 50 and 33 cm., In contrast to the children that can do you with placed objects to 7 cm., dogs compensate for this lack using his other senses such as smell and taste, as humans age dogs begin to have disorders in visual accommodation.

The vision or not in colors of dogs there are studies to the contrary and to favour, the most modern and scientifically controlled indicate that dogs have a type of color vision, but not in the same grades than humans.


The photoreceptor used in color vision is the cone and cone in the retinas of the dogs have been found. These cones are present but in much fewer numbers and represent slightly less than the 10% of the total of the photoreceptors of the dog.

Aparentemente hay dos tipos de conos en la retina canina: one of them see in shades of purple and the other type does see yellow greenish shades. Due to this, it could be said that the visual spectrum of dogs is divided into two tonalities., in the purple range- purplish blue (probably more bluish) and the other yellow-green yellow and Red (probably be seen as yellowish).

The greenish-blue tones are probably seen by dogs as grey shades. The dogs are unable to distinguish colors that we appear as green, yellow-green, Orange or red and are also unable to differentiate between the blue-green gray. But dogs are much better able to differentiate between the different shades of grey that people which is a great advantage to be able to see and discriminate objects with low light.

All preceding may indicate us that the visual system of the canines is worse than the human but this occurs only in some aspects, in others, such as seen in bright or low-light conditions (Sea, desert, snow) differentiation of gray and their depths, etc. the canine system is much more efficient than the human. These differences must be in a 90% to each visual system is made to measure for each species natural and primitive living conditions.

Source:”Vision in dogs”, Paul E. Miller, DVM and Christopher J. Murphy, DVM.

▷ The world of Pets: Dogs, cats, birds, reptiles, amphibians

List of longest dogs

The dogs listed as “Verified” they are the ones whose ages have been published in Guinness World Records or in other reliable sources. Those listed as “not verified” they are those whose supposed age is less certainty.


Dogs live longer verified:

1Bluey07 de junio 191014 de noviembre 193929 years 160 daysCattle dog, AustraliaAustralia
2Bella197906 de septiembre 200828 years 252 daysLabradorUnited Kingdom
3Teddy190806 de agosto 193728 years 218 daysPoodleUnited States
4Max09 de agosto 1983Live27 years 298 daysTerrierUnited States
5Bramble01 de septiembre 197531 de marzo 200327 years 211 daysBorder CollieUnited Kingdom
6Adjutant14 de agosto 193620 de noviembre 196327 years, 98 daysLabradorUnited Kingdom
7Butch1975200327 years, un díaBeagleUnited States
8MiniusRescued 16 de enero 1985Live26 years 138 daysMestizoPoland
9Pusuke01 de abril 1985Live26 years, 63 days?Japan
10Smokey18 de enero 1986Live25 years 136 daysShih TzuUnited States
11Sugar18 de agosto 195213 de agosto 197724 years 360 days?United States
12Piccolo01 de octubre 198726 de diciembre 201023 years, 86 daysMestizoItaly
13Chanel06 de mayo 198828 de agosto 200921 years 114 daysSausage dogUnited States
14Otto14 de febrero 198914 de enero 201020 years 334 daysDachshund-Terrier CruzeUnited Kingdom
15Heidi12 de enero 1991Live20 years 142 daysSausage dogUnited States

Unverified dogs live longer:

1Chilla01 de marzo 1952198432 years, 12 daysLabrador and Australia won CruzeAustralia
2Jerry1983Live27 years 276 daysMestizoAustralia
3Penny1984Live27 years 153 daysBernese mountain dogGermany
4Ned1987Live24 years 138 days?New Zealand
5One01 de enero 1988Live23 years 153 daysAmerican Cocker SpanielUnited States
6Ebby1987Agosto 201023 years, 61 daysPastorUnited Kingdom
7Gracie1988Live22 years 155 daysCairn Terrier CruzeUnited Kingdom
8BillyDiciembre 1988Live22 years 154 daysYorkshire TerrierUnited Kingdom
9Scruff20 de enero 1989Live22 years 134 daysOf mixed raceUnited Kingdom
10Bertie29 de enero 1989Live22 years 125 daysTibetan Terrier crossUnited Kingdom
11Lulu1989Viva22 years, 97 daysBeagle cruzeUnited Kingdom
12Jerry08 de julio 198806 de junio 201022 years, 29 daysGerman ShepherdCanada
13Fergie1989201021/22 yearsYorkshire TerrierUnited States
14Molly13 de agosto 198902 de febrero 201121 years 173 daysPomeranianUnited States
15JD1989Live21 years 155 days?New Zealand
16Paco Sosa05 de septiembre 198912 de febrero 201020 years 160 daysSausage dogUnited States
17Midge01 de septiembre 1990Live20 years 275 days?United States

Source: wilkipedia