It turned out that the digestive efficiency was higher in pairs with offspring as compared to pairs without offspring or unpaired birds. Furthermore, individuals with high ADOM (apparent digestibility of organic matter) were more likely to breed successfully in the following season than those with low ADOM.
Publication in "Scientific Reports":
Frigerio, D., Kotrschal, K., Fabro, C., Puehringer-Sturmayr, V., Iaiza, L., Hemetsberger, J., Mason, F., Sarnataro, C., Filacorda, S. Social context modulates digestive efficiency in greylag geese (Anser anser). DOI: 10.1038/s41598-018-34337-3
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