So far, the world's population has reached 7.594 billion. At the same time, the population is also increasing year by year. As the population increases, so does the demand for food. In order to solve this problem, humans began to hunt animals for no reason.
On this basis, many animals are threatened with extinction. In fact, experts have long pointed out that wanton killing of fish will cause many problems and that humans will eventually feel the consequences of their own cultivation.
First, let me explain the concept of 7.594 billion people. For one person, if we eat 200 grams of food, we will eat 600 grams of food per day. Food consumed by human beings in a day: 7 billion × 0.6 kg = 4.556 billion kg. The data is so amazing.
If you eat one fish every day, you will eat 7.594 billion fish over a long period of time, which is a kind of damage to the fish.
Three-quarters of the earth is covered by the ocean, which is why many people believe that fish resources are very abundant and that humans have renewable and infinite fish resources to feed themselves.
According to relevant research, whales eat five tons of krill per day. Whales have lived on land for many years. The number of krill has not decreased, but since humans began hunting it, the number of krill. Krill have declined. Humans have arbitrarily eroded marine fisheries resources, causing harm to marine fishes during most of the fish breeding season.
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Recently, scientists have pointed out that humans have been unscrupulously fishing for marine life, leading tocaused changes in some fish. Of course, here the change refers. to the change in size of the fish.
Darwin's theory of evolution has been fully verified here: some smaller fish are better able to escape human fishing nets. “Natural selection, survival of the fittest”. It is for this reason that many small fish have escaped human hunting, thus passing on smaller genes to the next generation during future reproduction.
Changes in the size of these fish are caused by large-scale hunting by humans.
To test this theory, scientists studied 6 groups of silver carp. They caught the largest and smallest fish, respectively, and after four generations of reproduction, the sizes of the two types of fish differed by 2 times.
From a scientific point of view, large-scale fish hunting by man ewill ultimately lead to a decline in the quality and quantity of fish, which will further affect the ecological balance of the entire ocean. What do you think?