The magical species of nature always make people have a black look , from diet to mating, showing all kinds of strange characteristics.
A look at the dog
Even dogs domesticated by humans have the strange mating behavior . They are locked back to back after mating. In a sense, isn't it very dangerous? ?
The darling of human beings
According to research, the ancestor of dogs is gray wolf , which was domesticated by people as early as 16,000 years ago and became a "powerful leader" of human beings.
Experts speculate that during the primitive tribe period, gray wolf and humans were likely to be two groups that were incompatible with water and fire.
There are many similarities between in meat recipes, which leads to mutual snatching during the hunting process.
Both sides are group-like, and no one will give in to each other when they fight.
Although it is very similar to Husky, it is indeed a gray wolf
Later, it was smart humans gained the upper hand and "beat" a group of gray wolf, and people found that the sharp sense of smell and observation ability of gray wolf could not reach the level of reach of.
At this time, some people want to domesticate the gray wolf and treat them as hunting assistants.
Later, after a period of time, the gray wolf gradually adapted to life with humans, because the gray wolf found that following humans had soup and meat to eat, so from the beginning of hostility became intimate .
In this way, after a group of gray wolves were domesticated, the gene changed to a certain extent and was inherited.
Wolfs were domesticated step by step
Due to the different types of domesticated gray wolf, living conditions are different, and coupled with the influence of the geographical environment, the dog after domestication has derived different races .
In archaeological discoveries, all dogs in the world are originated from the middle and lower reaches of the Yangtze River in in China.
From the perspective of genetics , dogs may have been domesticated by humans earlier, and perhaps they have become human "companies" 100,000 years ago.
No matter what, the predecessor of the dog comes from natural . So is the strange mating behavior also an innate habit that cannot be changed?
Attachment and mating behavior
is actually the opposite. The Attachment and of the dog only appeared after entering human society.
And locking is an indispensable "ritual" during mating.
Canines are similar to felines. The entire mating process seems to be very long, but in fact they are all "fast gunners".
As the saying goes, there is not enough time, and it seems to be half an hour or even an hour. In fact, the canines have and mating more than a dozen times.
This behavior of multiple mating is to fully ensure that sperm cells can bind to egg cells.
In addition, the number of sperm cells produced by dogs is sparse and is small. Only after multiple accumulations can it be possible to reach the number of other animals at one time.
5~8 is the sperm cell of dogs
Dogs have also evolved unique functions on their organs.
There are two things similar to airbags at the end of the organ. After mating is carried out for a few minutes, the airbags begin to expand. When the expansion reaches a certain level, the two dogs are basically fit together unless mating is completed. Otherwise, it cannot be separated easily.
This is also the time when dogs are most fragile , they have organs connected. Once they face natural enemies, they have almost no ability to resist.
So, don’t want to separate the dogs out of curiosity when they are mating. The most likely result is that the two dogs both die .
So, why do dogs use this locking method? Is it bad for other methods?
locking reasons
The first reason why dogs use locking is that the first point is that dogs have organs that are very tough and can still make large moves after they are "online".
The second is that atresia can allow the sperm cells in male dogs to fully transport into female dogs.
Dogs are walking animals with four limbs, and their bodies are not like humans. They have limited movement postures, and the locking method is the best solution for dogs.
The third thing is to talk about the gray wolf being domesticated entering human society.
It is hard to believe that wolves can actually be domesticated
In nature, in order to cope with the ever-changing external world, gray wolves usually choose to mating while playing.
On the one hand, it is to make the other party happy so that the female gray wolf can ovulate quickly and complete mating. On the other hand, it is also warning the surrounding animals, indicating that they can still act, and do not attempt to " take advantage of the situation and enter " .
In nature, even gray wolves face various threats to at all times and . In order to deal with the "variables" that may occur at all times, gray wolves dare not use the lockdown method.
This is different for domestic dogs. They are deeply protected by in human places and they have the ability to mating in any way.
Dogs don’t have to worry about the mating process being disturbed, they will naturally enjoy it.
Over time, the dog evolved a completely different mating method from the Gray Wolf period, which is something that animals in nature cannot envy.
When it is worth mentioning, the female dog does not have a clear ovulation , which also increases the uncertainty of conception. Only after sufficient "communication" can the male dog be psychologically and physiologically relieved.
At this time, some friends may be more curious about why animals in nature have clear ovulation period in , but dogs do not?
Dog ovulation period disappears
Why do dogs ovulation period disappears? It starts with why , the animals in nature, have a clear ovulation period.
Egg cell
In nature, there is the law of survival of the fittest . Each species has tried every means to continue, and the clear ovulation period can mention the opportunity for species to reproduce.
Because during this period, the probability of female animals ovulation is very high, and the mating desire emitted in the body attracts males to mating.
Therefore, as long as sufficient mating is performed during this period, the probability of female conception is relatively high.
Fertilized egg development
Many animals choose to ovulate in spring because considering the baby's raising, the temperature in spring is suitable for the baby's growth, and there is plenty of food.
Dogs live in human society and "eat and drink" with humans. They don't have to worry about food, but they don't consider the factors of natural enemies.
Dogs are playing and playing
In other words, it doesn’t matter which season the dog wants to give birth, and the temperature of is not very important, so the dog simply hides his ovulation period.
The same is true. After humans formed the group , they have received certain guarantees in all aspects, so naturally there is no need for a clear ovulation period.
Human civilization and dogs
It can be said that the development of human civilization cannot be separated from the participation of dogs. Although dogs are more used for viewing pets, Guda's dogs really play a role .
In ancient times, dogs followed the hunters of the tribe, searching for traces of prey through 's keen sense of smell . Sometimes humans injured their prey, but unfortunately letting their prey escape was to rely on the dog's keen sense of smell to find traces. .
Doululu
Dog's keen perception ability also allowed people from the primitive tribe to avoid many risks . When night came, the proud vision of human beings no longer works, and the dog replaced human beings Eyes.
When the dog finds that there are large carnivores around him, he will bark constantly to remind the owner of the crisis.
After entering feudal society, goubi also entered ordinary families, which was the best choice for guarding the house.
When feudal society handles cases in the government and finds criminals, it will also use the dog's sense of smell to find clues at the scene of the case.
Dogs compiled
thousands of years ago, and even dogs were trained as "warriors" , used in war
. After that, many expensive breeds have been differentiated among dogs. Become rich gradually People's pets.
Since time, whether it is a domestic pet or a military trainer, the dog has become the most loyal partner of human
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