I stole your sperm, the child you gave birth to have nothing to do with you | Natural little speaker

Welcome to the 13th issue of the natural small speaker column. In the past half a month, we collected these fun and interesting natural news and research:

1) Catfish hijacked sperm and gave birth to the descendants of no father

2) The small elephant falling into the pit was successfully rescued

3) Fish that look like jelly, also bring their own suction cups

4) Fluorescent fish

5) Will the woodpecker be a brain shock?

6) 50,000 White Whale Bear Online Live

Hijacking sperm

As the most successful invasion of fish in Europe, Silver has an unexpected method of breeding- "fraud" sperm, but it is used to self -cloning.

Female Silver Capital (Carassius Gibelio) | KUHL et al., 2022

Female silver is not expected to find the right spouse. What they need is only sperm -sperm can come from any other catfish species, such as different species of black torion. In order to obtain sperm, female silver will mix in a group of catfish, waiting for the sperm of other catfish.

However, after the seizure of egg encounter, conventional fertilized eggs will not be formed. Under the stimulation of sperm, the egg cells start to split, and at the same time decompose the genetic material from the sperm, and finally the offspring of the offspring does not carry male genes at all. In other words, although sperm is needed, the child born to female silver is nothing to do with "children". Sperm is just a tool for split egg cells -this reproduction method is called "lonely female who depends on sperm. Reproductive.

Silver: Need objects, but not completely needed | женя / wikimedia Commons

The different ways of reproduction of silver are attributed to the hybridization between different species. Animals generally have only 2 groups of dyeing, but there are 6 groups of silver. This is the result of hybridization with different species. Their genome has a total of 150 chromosomes, more than three times the human genome.

Scientists speculate that during the hybridization process, there was an accident in the decreasing division, and the offspring became multiple bodies. Such a coincidence makes it possible to reproduce monomers, and quickly expand silver, successfully occupying the habitat and food resources of local catfish.

Elephant was rescued

In Thailand, people rescued a poor little elephant from the drainage tank of the golf course.

The stadium is located in the suburbs, and the elephant group lives nearby. The small elephant who fell into the drainage tank couldn't climb, and the mother couldn't help it.

Fortunately, a passing resident found a small elephant and its anxious mother. In the rain, the veterinarian and rescuers quickly arrived at the scene, but the mother was afraid that people would hurt their children and stayed with the small elephant to prevent rescuers from approaching. In desperation, the veterinarian had to inject three doses of sedatives for the mother. Unexpectedly, even if the mother was about to lose her consciousness, she walked towards the child, and finally fell into the pit, but she took the elephant under her.

The rescued elephant and helpless small elephant in the pit | references [2]

The rescue worker rescued Xiang Mom from the pit with a truck, climbing to it for the cardiopulmonary resuscitation (CPR). At the same time, they cleaned the soil in the pit with an excavator and opened a path for the small elephant to allow it to climb out of the mud.

Xiaoyang can finally climb out! | References [2]

After more than 3 hours of rescue, the Xiaoyan was finally rescued from the drainage tank. The like mother also resumed consciousness, and also fed milk that was shocked and afraid of the small elephant. In the end, their figures disappeared together in the jungle.

Xiang Mom returned to the jungle safely with the child with the child | References [2]

The whole process of saving elephants is so touching!

Deep -sea jelly

Recently, scientists found jelly in the sea of ​​Alaska ... Oh no, it is a fish that looks like jelly!

Looks like jelly, it feels more like jelly's round spotted lion fish | Sarah Friedman / Noaa

This fish is called Crystallichthys Cyclospilus, living in a place where it is 100-800 meters deep underwater, so it is rarely recognized by the public. Not only do they look like jelly, their feel is also very Q -bomb -scientists believe that this is to maintain buoyancy and fight against the pressure of deep sea. In addition to their eyes and stomachs, their bodies are almost completely transparent, which allows them to integrate with the background of the dark paint in the deep sea and invisible in the eyes of predators.

This lion fish also has a unique structure -suction cup. The suction cup evolves from the abdominal fins, allowing them to adsorb on the rocks and corals on the bottom of the sea, and it is motionless in the water flow. At present, people only know that lionfish predation of small vertebrates, and more features have yet to be studied.

In this survey, scientists also encountered many strange marine creatures: huge orange sea spiders, with long legs comparable to supermodels;

Orange Sea Spider | Sarah Friedman / Noaaa

The body -shaped mini catfish has a fierce big mouth with sharp teeth inside.

Daishu | Sarah Friedman / Noaa

Night light fish

Irish researchers have discovered a new fluorescent creature: this is a cyclopterus lumpus larvae, which will emit green light under the inspiration of ultraviolet light.

Tiring and glowing round fin fish larvae | Thomas juhasz-Dora

This fish is distributed in some areas of the North Atlantic and Arctic Ocean, and they have strange appearance and changing body color. Researchers have observed 11 round fin fish larvae under different light conditions. They are light green under natural light, but under ultraviolet light, the whole body is bright green light, raised nodules, raised nodules The strongest fluorescence.

At present, it is not clear whether this bright fluorescence has a role in round fin fish. Researchers speculate that biofluorescences may be the communication signals between these fish, and they may be able to identify each other through fluorescence. It may also be related to attracting prey, or it is not special.

No fear of brain shock

Woodpecker is so hard topert, why do they have no brain shock? In the past, a common explanation was that their skulls could absorb impact and protect their brains -but new studies published in "Contemporary Biology" pointed out that this statement was not established.

Dryocopus Pileatus under high -speed photography | Current Biology / Van Wassenbergh et al.

In the past, people speculated that the "sponge -shaped" bone behind the beak of the woodpecker had the effect of absorbing impact. However, high -speed photography analysis shows that this structure has always performed very hard in the process of woodpecker, and there is almost no shock absorption effect. Researchers also pointed out that evolving and impacting skulls will reduce the efficiency of woodpeckers, which will not be conducive to the survival of woodpeckers.

In the past, people guessing the bones of the green part in the picture can help the woodpecker to absorb the impact, but it does not actually have this effect | Van Wassenbergh et al.

Although the skull is not protected, the brain of the woodpecker is still safe -this is mainly because their brains are relatively small, and they will not bear the large pressure changes like the human brain at the same acceleration. According to the calculations of researchers, these woodpeckers should increase the speed of woodpecker to twice it to cause brain fluctuations.

White Whale Live

The sun is hot, come to see the scene in the Arctic Sea, "Cloud cooling"!

July 15th is the Arctic Sea Ice Day. A research vessel of a Arctic protection organization has continued to broadcast the migration of the White Whale from this day. At this time of each year, about 55,000 white whales migrate from the Arctic to the Hudson Gulf of Canada; when the bay is frozen in winter, they will migrate north.

White whale that migrates to the Bay of Hudson | Ansgar Walk / Wikimedia Commons

For the White Whale, the Bay of Hudson is a safe shelter that allows them to escape the hunter -killer whale. Moreover, the Gulf of Hudson is connected to the estuary of the Churchill River. It has sufficient food resources, warm, and low salinity. It is very friendly to the little white whales that do not grow enough whale fat. molt.

Research ships that provide live broadcasts are named Delph, which comes from the abbreviation of the White Whale's name Delphinapterus Leucas. There are two camera positions on the Delphi ship, one on the deck, one under the water, and they can also capture the various barks of the white whale, such as clicking, screaming, and brisk breath.

Beloto whale asked everyone to ask you well | Madison Stevens / Polar Bears International

Here

Live broadcast not only allows animal lovers to be full of eyes, but also provides researchers with precious first -hand information. By observing the white whale population that migrates to the Bay of Hudson every year, researchers can confirm their health and reproduction. Once abnormalities occur, they can formulate protection measures in time.

references

[1] https://phys.org/news/2022-07-invasive-fish-sperm-hijacking-success.html

[2] https://phys.org/news/2022-07-baby-elephant-thailand-manhole.html

[3] https://www.liveScience.com/translucent- jell-e-fish

[4] https://onlineelibrary.wiley.com/doi/epdf/10.1111/jfb.15154

[5] https://www.cell.com/current-biology/FullText/s0960-9822 (22) 00855-77

[6] https://www.liveScience.com/beluga- cam-whales-migrate

Author: Cat swallow, the window knocks on the rain

Edit: Mai Mai

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