Environmental factor that affect fish spawning

1. Temperature: Fish require specific water temperatures for spawning, and changes in water temperature can impact spawning success.

2. Water Quality: Water quality is a crucial factor for spawning, and water pollutants can adversely affect egg hatching, larval growth, and survival of the fish.

3. Water Flow: Water flow rate, direction, and consistency greatly influence the successful natural spawning of fish.

4. Oxygen Levels: Fish require sufficient oxygen levels for successful spawning, and low oxygen levels in water can reduce spawning success.

5. Habitat Availability: Changes to the natural habitat of fish can impact spawning, and the destruction or loss of spawning habitats can severely impact the spawning cycle of fish.

6. Light: The presence or absence of light can influence fish spawning cycles, and changes in lighting patterns, including artificial light, can impact the breeding success of fish species.

7. Predators and Disease: Predators and diseases can impact the survival of eggs and larvae during spawning.

8. Human Activities: Human activities such as overfishing, habitat destruction, and pollution can have a significant impact on the spawning success of fish populations.