Offspring body condition and immunocompetence are negatively affected by high breeding densities in a colonial seabird: a multiscale approach.
J L Tella, M G Forero, M Bertellotti, J A Donázar, G Blanco, and O Ceballos
Proc Biol Sci. 2001 July 22; 268(1475): 1455–1461. doi: 10.1098/rspb.2001.1688.PMCID: PMC1088763