See also: Wolf (homonymy)
2 subspecies:
The wolf (API /lu/) or gray wolf ( Canis lupus ) is a Mammifère of the family of the Canidé S, and a close relation to the domestic Chien.
The female of the wolf is the she-wolf , its small is the wolf cub . The wolf howls .
The historical habitat of the gray wolf includes/understands all North America (of Mexico in Alaska and Greenland), all Europe (of north in the south) and almost all Asia. It was always absent from Southeast Asia, of Oceania, of Africa and South America.
The wolves were formerly very widespread in all the Northern hemisphere, but their population was decimated, by hunting on the one hand, but also following the occupation of their habitat by the man. One can even speak about extermination in second half of the 19th century in Western Europe, after work of Pasteur making wolf the principal wild vector of the Rage. Strong rewards were allotted to the hunters cutting down of the wolves, and of the corpses of animals poisoned with the Strychnine were deposited on their crossing points.
The wolves are predatory the, alive one and driving out in packs organized, according to a strict social hierarchy. The pack is directed by a male alpha and a female alpha . The couple alpha is generally the only one to procreate. This type of organization is also found at others canidés alive in packs, such as the Dhole S ( Cuon alpinus ) and the lycaons ( Lycaon pictus ), respectively wild dogs of Asia and Africa.
The bond between the wolf and the domestic dog is discussed enough. Some see the wolf like the direct ancestor of the dog, while others consider that this ancestor would be rather the gilded Chacal ( Canis aureus ). Currently the dog is regarded as a subspecies of Canis lupus . In fact, canidés are a family which evolved/moved only recently, and of the crossings between various species of the type Canis can still occur.
The wolf reaches its sexual maturity at 3 years for the male and 2 years for the female. The season of the loves takes place, according to the areas, from January to March. At the end of a gestation from 61 to 63 days, the female thus puts low between March and June.
The ranges count three to eight wolf cubs from 300 to 500 grams, that their mother nurses using her 5 pairs of udders.
The bite of the wolf reaches a pressure of 150 kg/cm ², that is to say the double of a large dog.
The wolf is a good swimmer and a better runner still: its top speed is from 45 to 50 km/h, and it can traverse up to 60 km in one night (a record of 190 km is attested).
Its sense of smell enables him to detect an animal to 270 m against the wind and its morphology offers an angle of vision with 250° to him (180° at the man). The night, the eyes of the wolf appear phosphorescent because they are papered of a layer of cells, the Tapetum lucidum , which enable him to be born as well as.
The hearing of the wolf enables him to hear sounds up to 40 Khz (20 Khz at the man), it perceives in particular other wolves to howl until a distance from 6,4 to 9,6 km.
The cardiac beats have a frequency of 90 pulsations per minute, up to 200 at the time of significant efforts.
The respiratory frequency is of 15-20/minute, up to 100 when the wolf halète.
A nonexhaustive examination of file in the parochial registers carried out by Jean-Marc Moriceau counts more than 1100 cases of predation of the man by the wolf, definitely distinguished from the deaths continuations to bites of mad wolves (more than 400 starting from the same sources), in France (current metropolitan territory), between the years 1580 and 1842. The victims are in very large majority of the children or isolated teenagers. This predation of the man, considered to be unusual by the contemporaries themselves, could be favoured (according to the author of the study) by the wars and disturbance political which, by strewing the campaigns with corpses without burial, would develop at a minority of wolves a taste for the human flesh. Although marginal with respect to mortality under the Old Mode, these cases had a great effect over the population and the imaginary collective, nourishing the fear and the hatred of the wolf.
However, as opposed to what wants to make it believe the popular belief, and its detractors (in particular certain stockbreeders and hunters), the only certificates of attacks of the man by wolves, in France, were listed only in death certificates (consigned in the parochial registers under the old Mode), which does not constitute an absolute proof. The only real conflicts having been noted in addition only in cases or the man would have come to attack the wolf, when it would have disturbed mothers seeking has to protect their small, or in period of prolonged famine.
There are thirty to forty million years, the species Miacis gave rise to two types of mammals which one can attach, thanks to two series of fossils, with the Chien and the Ours. The ancestor of the Dog, Cynodictis, had the same number of teeth as the wolf. He was smaller than this last, but its body was long and flexible like that of a Belette; its legs were of an intermediate size. The 15 million years which followed transfers the development of the family of the raccoons which dissociated itself to continue her evolution separately.
Thereafter, there is between 15 and 30 million years, the tendency was accentuated to give the characteristics of the contemporary wolf, Cynodictis while passing by Cynodesmus and Tomarctus. The upper part of the leg lay, as well as the legs which became more compact, the interior print became more atrophied on the back and more reduced leg on the front leg; the tail is shortened, and all these proportions started to approach those of the wolves and the Renard S.
The wolf and the Renard result both from Tomarctus and started to develop separately approximately 15 million years ago. Although the size of the Renard did not evolve/move much, the wolf as for him, continued to grow. Another connected species, the wolf " noir" ( Canis dirus ) also dissociated itself. Some of them were much larger than the wolves of today, but they disappeared today. Since approximately one or two million years, the wolf practically remained the same one.
The size of the packs varies simple couple with the dozen individuals. However rare cases of Meute of more than 30 wolves were observed, thus the most pack ever observed were made up of 36 members and lived in Alaska. It also varies according to the period of the year: the independent factors are mortality and dispersions. Indeed, certain wolves decide to leave the pack (like the wolves omega) or are banished after having failed at the time of a conflict. Tensions can be born for several reasons: when food is done rare and not very available (especially at the end of the winter), to be able to couple itself (at the end of the autumn) or quite simply to dominate the other wolves. The majority of the wolves thus leave their native pack between 9 and 36 months. A new pack is formed when two dispersing wolves meet and have a suitable territory (i.e where food is accessible and sufficient) to found a new family.
For social animals like the wolves, the life in pack has several advantages:
The howl is undoubtedly the most known means of communication of the wolf. The wolves howl - inter alia - to gather and maintain a cohesion in the group. These songs also inform the wolves in the neighborhoods of the presence of the pack, in order to prevent against the intrusions. Just like the moanings, the howls are composed of several harmonics what gives the impression which the pack which howls is much more numerous than it is it really. It happens sometimes that a solitary wolf howls to announce itself to a potential spouse. Each wolf has a voice frequency which is clean for him and which distinguishes it from the others.
Another direction used for the external Communication in the wolf is the Odorat. Its nose whose faculties are much more thorough than at the man makes it possible to distinguish the odor from its congeneric. It thus uses markings out of the ground such as the Urine or the Fèces (excrements). These markings are used to delimit its Territoire, but also to give information on itself such as the sexual state (hormonal) of the females for the period of reproduction.
The wolves use a whole range of growls, moanings and short barkings to communicate between them within the Meute that is to express the Peur, the anxiety, the domination or the tender, the protest or to play or inform the pack of the presence of an intruder.
The wolves add to these aural signals of the visual signals, mainly by the expression of their face, their posture their movements and the position of their tail. A wolf in an aggressive state will have for example the glance fixes, the apparent chops rolled up, hooks, will be held right the hairs of the roughcast backs and the tail raised to seek to impress. Conversely, a wolf in a state of tender will be done smaller, the fleeing glance and the ears dropped, the tail between the legs. The wolf can in the event of tender passivates, to roll on the back and to expose its génito-anal area in order to show that it is dominated with the other wolf.
In addition to the markings out of the ground, the odor left by a wolf if it is rolled on snow or rubs against a tree will be like a “calling card”. The wolf secretes many odorous substances: at the base of the hairs, legs, on the level of the génito-anal area.
There remains a share of mystery in the Communication in the wolf, in particular on the exact functions of the howl although its function first is after the pleasure, the reaffirmation of the bonds which link the wolves of the clan. The tactile communication (for example: the physical contact of the Muzzle of the wolf cub on the lips of elder for régurgiter of food) and the gustatory communication also are studied still little.
The wolf adapted various manners, in its large surface of distribution. Sous-espèce S were born. This subdivision is however disputed by the specialists.
In Europe, all the wolves are described like gray wolves. There exist however considerable differences: in Italy and Spain, for example, the wolves are smaller and more russet-red, and especially more apprehensive than the live animals more in north.
According to the references one finds from 15 to 40 Sous-espèce S, however the tendency today is to be reduced considerably this list of subspecies by considering that it acts in the majority of the cases of local adaptations of the species Canis lupus (in particular by the analyzes and statistics of the taxonomist Ron Nowak). One can distinguish 2 groups from subspecies: those of America and those of Europe.
Wolf of Alberta, Canis lupus occidentalis (gathers
Wolf of the Large Plains, Canis lupus nubilus (gathers
Wolf of the Canada, Canis lupus lycaon
Arctic Wolf, Canis lupus arctos (gathers
Wolf of the Mexico, Canis lupus baileyi
common gray Wolf, Canis lupus lupus (gathers
Wolf of Siberia, Canis lupus albus
(note: Certain species (*) are not recognized by all the taxonomists)
The taxonomists recognizing the existence of the red wolf classify it in 3 subspecies:
Canis rufus rufus , (almost extinct, present in captivity or reintroduced)
Chien domesticates Canis lupus familiaris
This classification of the dog and the nutcase tends to currently be essential, in competition with old the denomination which were respectively Canis familiaris and Canis familiaris nutcase or Canis nutcase. That in fact of the subspecies of the wolf.
Convention of Bern of September 19th, 1979:
Favorable
This difference in opinions follows the chronological evolution of mentalities. The Middle Ages and until worms XIXe, the wolf had a representation, if it hostile, is not at least mitigated. Typically, it was represented like an animal pleutre and imbecile.
It is only as from the moment when one started to realize of his strong decimation (from XIXe) that the image of the wolf suddenly improved.
It remains in the imaginary collective this double representation.
the Little Red Riding Hood and Tom Thumb, drawn from the Tales of my mother Oye (1697) of Charles Perrault
With the limit of the history and folklore:
In the “Golden Legend”
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