ID_egg: Unique ID for each egg
StudySite: name of the study site
Nestbox: Unique ID for each nestbox
DateColl: date of egg collection (Julian date)
LayingSeq: laying sequence (1 = first-laid egg)
Incubation: whether incubation had started or not
plaque: ID of the plate
Lysozyme: Concentration of lysozymes (µg/ml)


