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Keywords: ultrasonography.
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Journal Articles
J Exp Biol (2001) 204 (12): 2167–2173.
Published: 15 June 2001
... mass. Gizzard size decreases when these birds eat soft foods, e.g. while breeding in the tundra. We studied the reversibility and time course of such changes using ultrasonography. Two groups of shellfish-adapted knots ( N =9 and N =10) were fed alternately a hard and a soft food type. Diet switches...