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Dec 31 2011

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Egg specific gravity and incubation in the Sooty Tern and Brown Noddy.

Sooty Tern (Sterna fuscata) Science Article 11

abstract

Flotation characteristics of birds’ eggs are commonly used to estimate their age. Schreiber (1970) and Hays and LeCroy (1971) have recently attempted to quantify the relationship between the appearance (degree of emergence and position) larid eggs placed in water and the age of the eggs. Westerskov (1950) has claimed that these flotation characteristics more precisely estimate the age of eggs than specific gravity

William Y. Brown, Auk, Vol. 93

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