Measures and methods for the fight against chickens

摘要

The present invention relates to a zona pellucida (ZP) protein or peptide for use in preventing the increase in the number of animals in an animal population. The invention also relates to the use of a ZP protein or peptide to prevent the growth of the number of animals in an animal population. The invention also relates to a method for preventing the increase in the number of animals in an animal population comprising the administration of a ZP protein or peptide to at least one female animal of the animal population and a feed containing a ZP protein or peptide.