Noninvasive Determination of Embryonic Heart Rate during Hatching in the Brown Noddy (Anous stolidus)

Abstract

S2 TL;DR: The audiocartridge measuring system was used to elucidate the changes in heart rate of the Brown Noddy during development, particularly just before and during the prolonged pip-to-hatch period, and the effect of ambient temperature change on the embryonic heart rate was estimated.