title: Hygiene and hatchability of duck eggs--a field study.
mesh_terms: D000818:Animals; D004372:Ducks / Q000254:growth & development / Q000502:physiology*; D004531:Eggs; D005260:Female; D006799:Housing, Animal; D006813:Humidity; D006920:Hygiene; D007185:Incubators; D013696:Temperature