Why do fish breed?

Biological mechanism of fish reproduction

The reproduction of fish is related to its biological sex. Male fish will release sperm when laying eggs, while female fish will release eggs, and sperm and eggs will combine to form embryos. These embryos will drift to the right environment with the current and hatch into young fish. In addition, the breeding process of fish is also related to many biological factors, such as fish weight, age, environmental temperature and so on.

When the temperature rises, fish will start to lay eggs, which is related to the changes of hormones in the body. During the spawning period, the male fish will release a lot of sperm, and the female fish will release a lot of eggs. The combination of egg and sperm has become the smallest life form in history-fertilized egg.

2. The importance of fish reproduction

Fish reproduction is one of the important processes to maintain aquatic ecosystem. The success of fish reproduction is closely related to environmental quality. For example, water pollution, water temperature changes and weather changes will all affect fish reproduction. If these factors are not suitable for fish reproduction, then they will not reproduce normally, which will eventually lead to the imbalance of aquatic ecosystem.

In addition, fish is also an important food source for human beings. Through the reproduction of fish, the output of aquaculture can be increased and the food demand of human beings can be guaranteed.

3. The mechanism and protection of fish reproduction.

There are various breeding mechanisms and ripening methods of fish. For example, some fish will use physical factors, such as water flow, temperature, sunlight, etc. to stimulate reproductive behavior; Some fish can reproduce themselves by external factors, such as the weather, the moon and other natural factors.

At the same time, in order to protect natural resources and aquatic ecosystems, governments and protection organizations have also formulated a series of protection measures. For example, fishing is prohibited for a certain period of time, and fishing is prohibited during the breeding period, and germplasm reserves are set up to protect the breeding and living environment of fish.

4. Factors affecting fish reproduction

There are many factors affecting fish reproduction, mainly including the following aspects:

(1) Water quality: Water pollution will affect the reproduction of fish. For example, if the concentration of impurities in water is too high, it will adversely affect the growth and reproduction of fish.

(2) Water temperature: Too high or too low water temperature will affect fish reproduction. Different kinds of fish have different adaptability to temperature.

(3) Biological environment: Habitat and food required for fish reproduction will also affect its reproduction. If the environmental conditions are not suitable, it will have a negative impact on reproduction.

(4) Human activities: Industrialization, urbanization, large-scale fishing and other human activities have had a great impact on fish reproduction and changed the living environment of fish.