How costly is clutch formation in the Audouin’s Gull Larusaudouinii?

Audouins Gull (Ichthyaetus audouinii) Science Article 2


During the Audouin’s Gull’s breeding season at the Ebro Delta in 1993, 24 fresh eggsfrom eight three-egg clutches (modal clutch-size) were collected at the peak of thelaying period. Eggs were processed to obtain formalin-fixed yolks, which were halvedand stained using the potassium dichromate method.

Xavier Ruiz et al, J. Avian Biol. 31: 467-575.

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