Why should carp be at least 12 inches long when stocked in water bodies?

The reason carp should be at least 12 inches long when stocked in water bodies primarily relates to their survival rate from predators. Smaller fish are generally more vulnerable to predation, particularly from larger fish and birds. By ensuring that the stocked carp are at least 12 inches long, they are more likely to be outside the size range that many predators target, thereby increasing their chances of surviving in the new environment.

In establishing a stable population of carp, this size threshold helps ensure that most individuals can evade predation, leading to a higher survival rate and allowing the population to establish itself effectively. This strategy aids in managing aquatic ecosystems, as larger carp can also contribute to controlling vegetation and maintaining ecological balance.