Introduction:
First, from the characteristics analysis
1.1 Catfish like to eat a variety of foods
Catfish are omnivorous fish that eat grass, plankton, and other small fish, among other things. This dietary habit allows them to get more nutrients.
1.2 Catfish have a relatively long lifespan
Catfish have a long lifespan and generally live to more than 20 years. Due to their longer lifespans, they have enough time to eat more food in order to grow and survive.
1.3 Catfish grow fast
Catfish is a relatively fast-growing fish. With the right water temperature and environment, they can grow quickly and gain a lot of weight in a short period of time.
Second, from the analysis of environmental factors
2.1 Environment inhabited by catfish
Catfish generally live in rivers, lakes, and oceans in fresh or saltwater water. These waters are rich in nutrients and oxygen, making them ideal for catfish growth.
2.2 Influence of water temperature
Water temperature is a key factor in the growth of catfish. When the water temperature is higher, the catfish's metabolism becomes faster and its ability to digest food increases. This helps them grow and gain weight quickly.
2.3 Other Environmental Factors
The growth of catfish is also affected by other environmental factors, such as light, water quality, etc. If these factors are in line with the growth needs of catfish, then they will be able to grow and reproduce better, and thus grow larger.
Third, from the impact analysis of human activities
3.1 A constant flow of nutrients
Modern human activity has brought about many changes, some of which are inevitable. For example, emissions from factories and cities allow pollutants and nutrients to enter water bodies.
These substances are very helpful for the growth of catfish, and they can grow rapidly with a continuous supply of these nutrients.
3.2 Overfishing
Despite the rapid growth of catfish, overfishing is still a very serious problem. When people overfish catfish, they lose their chance to reproduce and grow, and may even become extinct. Therefore, it is crucial to protect catfish resources.
Summary:
In summary, there are many reasons why catfish grow so much, including their innate characteristics, habitat and the influence of human activities.
It is necessary for us to protect the water environment, reduce pollution and fishing, etc., in order to preserve the precious biological resource of catfish.