What are the hazards of overfishing?

The harm of overfishing does not include environmental pollution.

Harm of overfishing:

1. damage to fishery resources: overfishing will lead to the reduction or even extinction of fishery resources, which will have a great impact on fisheries.

2. Disrupting the ecological balance: Some fishery resources are an important part of the ecosystem, and overfishing will disrupt the ecological balance and have an impact on other biological populations.

3. Affect the local economy: Fishery is an important economic source in many areas. Overfishing will lead to unemployment of local fishermen and affect local economic and social stability.

4. Increase marine pollution: Overfishing will increase the number of fishing boats and the use of fishing gear, leading to an increase in marine pollution.

5. Increase marine disasters: Overfishing will reduce the number of some marine species, which will further affect the marine ecosystem and increase the incidence of marine disasters.

6. Impact on human health: Overfishing will reduce fishery resources, thus affecting human food chain and possibly human health.

The concept and classification of overfishing;

Concept:

Overfishing, also known as overfishing, refers to the fishing industry reducing fish resources below acceptable levels. It can occur in any water area between the fish pond and the ocean.

Overfishing may eventually lead to the exhaustion of resources, increase of fishery subsidies, decrease of biological growth rate and serious decrease of biological density. In particular, overfishing of sharks has disturbed the entire marine ecosystem.

The natural recovery speed of fish depends on whether the ecosystem conditions are suitable for fish growth. The sudden change of species composition in an area may lead to the change of energy balance, which may cause other species to replace the original species (ecosystem change). For example, if all the trout are removed, carp will replace the trout, and it is almost impossible to restore the trout population.

Classification:

Overfishing young fish:

It refers to fishing before the fish grows to a reasonable size, so that the total output is less than that when the fish grows to a reasonable size. Appropriate reduction of fishing efficiency and leaving young fish will help to obtain maximum benefits.

Overfishing adult fish:

Refers to the situation that adult fish and fat fish cannot replenish their own quantity normally because of the decrease in catch. There are not enough adult fish to breed. Managers can restore the number of overfished individuals by increasing the number of individuals who lay eggs to a certain extent, usually by suspending fishing and setting fishing quotas and sizes.