The oldest fish in the world lived to be 112 years old
Have you ever thought about how old the fish live? Based on the fact that most of them have to dwell near the dangerous predators in very unpleasant conditions, one might think that they do not live more than two or three years. However, it is not so - recent 112-year-old fish was found in the waters of South Dakota American state. Scientists have calculated that she was born in 1907, when the steamer "Titanic" has not yet embarked on his tragic voyage, and the imminent start of the First World War, no one even suspected.
results fish belongs to the species bigmouth buffalo (Ictiobus cyprinellus). The average life span of this species is about 26 years. I found the individual had lived four times longer than most of their relatives, and in his long life gained 22 kilograms of weight, which is very impressive for this kind of fish. However, this is not a record weight - ever was a case where people were caught and 30-kilogram specimen.
How many fish live?
The life span of the fish depends on the species and their habitats. It is logical that tiny aquarium fish can live for quite a long time, thanks to a safe environment - the main thing that the owners time to purified water and do not forget to feed them. Fish living in the wild, constantly risking their lives because they can fall prey to predators and fishermen.
The life span of the fish:
- Pike - 7 years;
- Salmon - 15 years;
- Mackerel - 20 years;
- Carp - 20 years;
- Perch - 23 years;
- Sturgeon - 100 years.
For a long time it was thought that the most long-lived fish are pike. In particular, the authors of some books claimed that in 1794, near Moscow, the fishermen have caught a pike, which stuck to the gills ring with the inscription "I planted Tsar Boris Fedorovich." It is known that Boris Godunov rule from 1598 to 1605 years, that is, the pike was about 200 years old. Of course, due to the lack of any evidence, the story is just a legend.
That bigmouth buffalo can live more than 100 years, biologists have long guessed. To verify this, from 2011 to 2018, they occasionally catch these fish and determined their date of birth. Age was determined by the so-called otoliths - rock formations on the bodies of fish that are in regular intervals acquire new layers. Considering their number, it is possible to determine the age of many fish and crustacean creatures.
This 112-year-old fish survived two wars
Total scientists have been caught and studied about 386 fish. They were surprised because most of the bigmouth buffalo were older than 80 years, and among them there were very few young animals. The researchers quickly found the cause of the small number of young fish by examining the history of the city of Pelican Rapids Minnesota in whose waters and fish were caught.
Why do not breed fish?
It turned out that at the end of 1930 in the city was built the dam that blocked the fish to the location of their breeding. In the end, it turned out that the town in the vicinity of almost new born fish in the water and almost always lived individuals born during the war. They were able to survive, because it is almost not used in food and can be caught only in the interest of sport. Apparently, Minnesota sport fishing is not very much and developed.
Do you know of any disease helps the fish diet?
carp in the United States - why they do not like?
With all this, bigmouth buffalo are huge benefits to local rivers. The fact that they are actively destroying the carp that were brought to the US in 1970 from Kazakhstan's Lake Balkhash. Foreign to American waters fish multiplied and began to eat the local fish - some species are already on the verge of extinction. A carp for Americans themselves almost no interest - if in Russia they are happy to catch and eat, then in the United States do not like them because of the abundance of seed.
As you can see, even these inconspicuous creatures, like fish, are still able to surprise us. Yet some amazing fish are sinegolovye talasomy females which in a very short time can turn into males. On a complete change in appearance and character they take about 10 days. But the interesting thing is that they change the floor for a reason - it has a very good reason.
If you are interested in science and technology news, subscribe to our channel at Yandex. Zen. There you will find materials that have not been published on the website!