After hugging the tail of the fish

"Want to go see it?"

No need to ask, of course he wants to see it!

Mating, mating and reproduction are one of the focuses of marine biology research. In fact, as early as he learned the language of mermaids and learned that the purpose of their coming to the Arctic Ocean is for the continuation of the race, he had already begun to look forward to the arrival of the breeding season.

He had heard from Zhang Chang before that the mermaids could only complete their final union by migrating to the waters below Iceland every year.

This made him feel a little puzzled, because in his opinion, mermaids are similar to humans in many ways, with similar body organs and similar group behaviors.

So he prefers that mermaids and humans have the same ancestors.

Humans are continuous reproductive organisms, they can mate at any time of the year, and they don't need to wait for a certain season to combine.

Like bears, salmon, etc., they have their own fixed estrus period, and they will breed in specific seasons of the year, while other times are not easy to estrus.

Having said that, I have to mention the classification of animal reproduction.

There are four types, namely seasonal breeding animals, periodic breeding animals, opportunistic breeding animals and non-breeding periodic animals.

Animals that breed seasonally will reproduce under conditions that are most suitable for the survival of their cubs in terms of temperature, climate, and environment, and their estrus period will follow. It can be said that no matter their estrus period or breeding season It serves for the survival of the cubs and the continuation of the race.

Animals that reproduce periodically have their own reproductive cycle. No matter how the external environment changes, their sexual behavior has a fixed cycle and will not be greatly affected.

Animals that reproduce opportunistically will immediately adjust their menstrual cycle, put themselves in estrus, and even adjust their reproductive cycle as long as the environment is suitable and conditions permit, in order to give birth to their offspring in a safer place.

There are also many animals without a reproductive cycle, such as mice, orangutans, and humans.They can reproduce all year round, and the number of these animals is generally more than other types of animals, and they are not easy to endanger.

Yu Guiyang felt that according to Zhang Chang's description, mermaids were more like seasonal breeding animals.

But they have to be under Iceland to soften the fish scales, facilitate the mating setting, and tend to opportunistically breed animals.

If there is no hindrance of fish scales, is it possible for mermaids to mate at any time like humans?

Or does it mean that the mermaid's estrus period is fixed, and only in winter is it possible to estrus?

These are the topics that he wants to study in depth.

Since it is engaged in marine biological research, a series of things such as field observation and sample recording are indispensable.

Time waits for no one. Compared with the exploration of science, the hotness of the body seems to be less unbearable.

Yu Guiyang voluntarily climbed onto Chi Yuan's broad back, and he didn't know if it was his illusion. When his chest was pressed against Chi Yuan's back, a cool feeling rushed to his heart along the place where they touched .

Wow, so comfortable.

He couldn't help hugging Chi Yuan even tighter, and the restlessness in his body was well soothed.

What he didn't know was that Chi Yuan felt the same way, even stronger than him.

Not daring to think too much, Chi Yuan swung his tail away and took the little mermaid to swim towards Iceland.

As I said before, Iceland, in the perception of mermaids, is the island that is covered with snow all the year round, which is the widest island formed by sea ice in the middle of the Arctic Ocean.

The further you swim to the center, the more ice there is on the sea.

The temperature of the seawater has not changed anymore, because it has reached the coldest minus degree, and if the water temperature is lower, it will freeze.

It didn't take long for Yu Guiyang to notice that sunlight could no longer penetrate the thick ice to reach the water.

This is due to the lower temperature of the sea surface.

The closer you are to the center of the North Pole, the cooler the sea surface will be, and the extent of sea ice will continue to expand.

Where Yu Guiyang and Chi Yuan are now, they are already in the seawater covered by sea ice.

Thick ice blocked the light, and the underwater became dim. However, with their excellent night vision, the mermaids could still see everything around them clearly under the dim Iceland.

He found that the distribution of ice is also very interesting, from thin to thick, forming a parabola, and finally extending to the bottom of the deep sea.

According to his estimates, the extent and thickness of sea ice will continue to increase in the following months, and the trend of increase will not stop until the following spring.

This is a good thing for animals living in the polar regions, it means they have more living space.

In fact, when the greenhouse effect was not so severe, the extent of sea ice in the Arctic Ocean was far more than that.

However, with the deterioration of the environment and the rise of temperature, the sea ice that had never melted all year round could not withstand the scorching summer and gradually melted, which brought disaster to many polar creatures.

Similarly, the melting sea ice has turned into a large amount of sea water, flooding the towns and villages closest to the Arctic Ocean and Antarctica or at lower altitudes, and people have paid a heavy price for their wanton environmental damage.

Therefore, the concept of the global village has never been just a talk. The fate of all living things in the sky, land, and ocean is closely related. To protect biodiversity is to protect human beings.

This is also his original intention of becoming a marine biologist. He hopes to make a small contribution to human beings' attention to the ocean and the protection of marine ecology.

While thinking about it, Chi Yuan suddenly stopped and took the little mermaid to swim to a more secluded seabed.

Yu Guiyang asked him: "Have we arrived yet?" He hadn't seen any other mermaids yet.

"Well, it's just ahead," Chi Yuan replied while swimming, "but we need to ensure our own safety first, so as not to be accidentally injured by the restless mermaid."

When Chi Yuan said this, Yu Guiyang understood.

When an animal enters the estrus period, its body functions will undergo certain changes, and its temperament will also become irritable and irritable.

He also heard from Zhang Chang that mermaids will start a series of fights in order to compete for their mates, and many mermaids die in the fights every year.

For this reason, Yu Guiyang specifically told Gao and the others to avoid fighting as much as possible.

But it was obvious from their expressions that they couldn't listen at all.

Yes, pay attention to safety or something, it will always be precious only when an accident happens.

Finally, they came to the sea closest to Iceland, the center of the North Pole.

I also saw mermaids wandering around here.

Mermaids who have no target for the time being will wander around in this sea area.

Just like a catwalk, this sea area is their booth, where they need to show themselves to the fullest in order to get the attention of the opposite sex.

They may also go to the sea ice to hunt some big guys, showing their powerful abilities.

Anyway, in order to attract the attention of the opposite sex, it is right to do everything possible.

Some of these mermaids were familiar faces, while some Yu Guiyang had never seen before.

Their appearances are also different. In addition to hair color and tail color, Yu Guiyang also saw that some mermaids have forked tail fins, and some mermaids even have dorsal fins, which look a bit alien...

Well, according to his aesthetics, these mermaids with dorsal fins might lose their right to choose a mate forever.

As for Big Brother Mermaid, it is bound to attract bees and butterflies, and the market is huge.

He rubbed Chi Yuan's shoulder and asked him in a low voice, "Are you going too?"

Chi Yuan, who is also a mermaid, is also looking forward to finding a partner to comfort and warm each other in this cold sea?

作者有话要说：池渊：我已经找到了，傻瓜。感谢在2021-09-0223:47:22~2021-09-0319:02:06期间为我投出霸王票或灌溉营养液的小天使哦~

Thanks to the little angel of irrigation nutrient solution: NO2 bottle; Anjibei 1 bottle;

Thank you very much for your support, I will continue to work hard!