Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Air-sac PO2, arterial PO2, venous PO2 and heart rate profiles during shallow (<50 m), approximately 8 min dives of four emperor penguins. Elevations in air-sac, arterial and venous PO2 values and in heart rate all occur within the first 2 min of the dives. Air sac, bird 7 (Stockard et al., 2005); arterial, bird 10; venous, bird 5; heart rate, bird 37 (Meir et al., 2008). b.p.m., beats per min.
