How many sterile male flies are released weekly in the Screwworm Barrier Maintenance Program?

In the Screwworm Barrier Maintenance Program, the release of sterile male flies is a critical component of controlling the population of the screwworm, which is harmful to livestock due to its larval stage feeding on living tissue. The correct answer indicates that 20 million sterile male flies are released weekly as part of an effective strategy to prevent the reproduction of screwworms in affected areas.

Releasing such a large number of sterile males ensures that they compete with the wild male population for mating opportunities. The high ratio increases the chances that these sterile males will breed with wild females, thus leading to a reduction in the overall population of screwworms over time. This method is based on the Sterile Insect Technique (SIT), which leverages the principles of population control through biological means rather than chemical interventions.

The volume of 20 million sterile males is strategically chosen to maximize the impact on the screwworm population, reflecting thorough research and practical experience in managing this pest effectively while minimizing negative effects on the surrounding ecosystem.