Russian experts recommend keeping rare fish in "dangerous" environments
Experts from the State University of St. Petersburg, Russia, suggest that keeping fry in rare fish in a “dangerous†environment is more conducive to obtaining necessary survivability before returning to the natural world.
According to the University’s fish experts, carp is a fish that has important economic value. At present, there are few wild salmon. In order to protect the fish, Russian researchers hatched and reared eggs and fry separately. Then put it into the river. However, experts have discovered that small-bred broilers are less likely to survive in nature. The reason is that the squid that grew up in the fish pond was not agile and did not know what to fear. Many captive squid became the mouth of other animals about four hours after entering the river. In addition, some small squids compete for food. After 40 days into the river, the body's fat content was reduced by about half.
In order to solve the above problems, ichthyologists conducted comparative experiments on small carps that lived in different environments. Researchers divided 6000 salmon fish weighing about 18 grams into A and B groups. Group A lived in an ordinary fish pond. In group B, fish ponds were surrounded by metal nets and surrounded by five large freshwater fish that feed on small fish. Eight months later, researchers found that compared with group A, the central nervous system of group B carp, which was associated with “danger†all day long, was more developed and its action was more agile. In the river, group B carp is better at discerning directions, looking for food and avoiding danger.
According to the above experimental results, Russian researchers suggest that the pool of rare fish fry be kept as close as possible to the natural environment to exercise the survivability of the fry.
Experts from the State University of St. Petersburg, Russia, suggest that keeping fry in rare fish in a “dangerous†environment is more conducive to obtaining necessary survivability before returning to the natural world.
According to the University’s fish experts, carp is a fish that has important economic value. At present, there are few wild salmon. In order to protect the fish, Russian researchers hatched and reared eggs and fry separately. Then put it into the river. However, experts have discovered that small-bred broilers are less likely to survive in nature. The reason is that the squid that grew up in the fish pond was not agile and did not know what to fear. Many captive squid became the mouth of other animals about four hours after entering the river. In addition, some small squids compete for food. After 40 days into the river, the body's fat content was reduced by about half.
In order to solve the above problems, ichthyologists conducted comparative experiments on small carps that lived in different environments. Researchers divided 6000 salmon fish weighing about 18 grams into A and B groups. Group A lived in an ordinary fish pond. In group B, fish ponds were surrounded by metal nets and surrounded by five large freshwater fish that feed on small fish. Eight months later, researchers found that compared with group A, the central nervous system of group B carp, which was associated with “danger†all day long, was more developed and its action was more agile. In the river, group B carp is better at discerning directions, looking for food and avoiding danger.
According to the above experimental results, Russian researchers suggest that the pool of rare fish fry be kept as close as possible to the natural environment to exercise the survivability of the fry.