Is global warming making fish stupid? If you can't catch any fish... | BoLan Daily

Is global warming making fish stupid ? If you can't catch any fish...

A foreign study found that global warming is not only changing the living environment of marine fish, but also affecting their ability to survive. The survival instinct of some fish has been weakened, and sometimes they will foolishly swim towards predators and fall into their own trap.

Studies have shown that global warming and rising carbon dioxide levels disrupt fish's sensory systems, including taste, hearing and vision, thereby impairing their behavioral abilities.

Fish have already been victimized by the "7-second memory" rumor and are considered not very smart. Now they are continuing to become even dumber, which makes us feel a little sorry for the fish.

With estimates that CO2 levels in marine ecosystems could rise 2.5 times by the end of the century, it’s no wonder that fish are suffering.

A wave of warming is coming , and people in the north can no longer wear thick clothes.

The coldest days of winter are over, the coldest period has passed, and the weather will become warmer.

In the next few days, the warm sun will continue to accompany the north, and the temperature will not stop rising. Before the 15th, the highest temperature in many places from North China to Jianghan will rise to above 20℃, and the highest temperature in the central and southern parts of Northeast China will also rise to above 10℃. The highest temperature in the North China Plain will be around 20℃, and you will feel the strong spring.

After a brief period of clearing up in the southern region, a new round of rainfall began last night. As the shallow trough on the plateau moves eastward, the rainfall will continue to move eastward tomorrow and the day after tomorrow. On the 15th, the rainfall intensity increased. There were moderate to heavy rains in the border areas of Hunan, Hubei and Jiangxi, accompanied by weak thunderstorms in some areas.

Generally speaking, until the 19th, the rainfall in my country will be concentrated in the south of the Yangtze River and southern China, and the continuous rainy state will continue. The precipitation will weaken and stop from the 19th to the 20th, but the southerly airflow will begin to strengthen significantly after the 21st, and the severe convective weather will gradually develop and strengthen in the later period.

What makes us human? A genetic competition between our ancestors and predecessors!

"Who are we and where do we come from?" This question has puzzled mankind since ancient times. Now, scientists are trying to find the answer by comparing the genetic sequences of modern humans and ancient humans.

There are significant differences between early modern humans and extinct hominin groups. For example, although both practice exogamy, which involves seeking female mates outside of one's own small, close-knit group, modern humans show higher genetic diversity. This means that our ancestors were more genetically dispersed, while Neanderthals and Denisovans show signs of inbreeding.

Another notable feature of modern humans is their migration and expansion. Our ancestors set out from Africa and not only occupied the survival territories of other ancient humans, but also spread to distant places such as the Sahara Desert, the Americas, and Oceania. This rapid and widespread expansion is called the "Allee effect," which suggests that larger population sizes and closer social ties contribute to the survival and reproduction of individuals.

Paleogenomics also helps us understand how modern humans adapt to different environments. For example, mutations in the EDAR gene in northern East Asia may have helped our ancestors survive in low-UV environments, while variants in the EPAS1 gene from Denisovans may have helped plateau dwellers adapt to life at high altitudes.

How to define ourselves and understand our uniqueness as human beings is a complex and difficult problem. As scientists continue to unlock the secrets of ancient DNA, we will see a clearer picture of human evolution.

The content of this article comes from a commentary article published in the journal Cell by Researcher Fu Qiaomie from the Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences.

Can myopia offset presbyopia?

I don’t know if you have ever heard of this saying: Although myopia is uncomfortable, it is good to endure it until you get older, because people with myopia will see things more clearly and will be less likely to suffer from presbyopia. But in fact, two negatives do not equal a positive...

Myopia and presbyopia are two different refractive error conditions with different causes and effects. They affect the ability to see far and near respectively. Myopia makes distant objects appear blurry, while presbyopia affects the ability to see objects clearly at close range.

As people age, they may be able to read close objects more comfortably without glasses because myopia reduces the effects of presbyopia to some extent, but this does not mean that the two can completely offset each other.

In fact, presbyopia develops independently of myopia and is caused by the aging of the lens. Therefore, even if you have myopia, presbyopia will still develop as you age. When myopia and presbyopia coexist, bifocal or multifocal glasses may be needed to see objects clearly at different distances, which is even more troublesome!

The idea that myopia in youth can alleviate the effects of presbyopia in old age to a certain extent simplifies the complexity of vision problems. It is important to have regular eye examinations and take appropriate vision correction measures according to the advice of an ophthalmologist.

Image source: pixabay

The content is compiled from China Science Popularization Expo Weibo, China Weather Network, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences, and Science Refutation

This article was first published on China Science Expo (kepubolan). Please indicate the source of the public account for reprinting