Summary: Z .Comparative Biochemistry and Physiology Part A 129 2001 797 809
The diving behavior of blue and fin whales: is dive
duration shorter than expected based on oxygen stores?
Donald A. Crolla,U
, Alejandro Acevedo-Gutierreza,1
, Bernie R. Tershya
Institute of Marine Sciences, A316 Earth and Marine Sciences Bldg., Uni¨ersity of California, Santa Cruz, CA 95064, USA
Departamento de Biologia Marina, Uni¨ersidad Autonoma de Baja California Sur, A.P. 19-B, 23080 La Paz, BCS, Mexico´ ´
Received 25 September 2000; received in revised form 21 February 2001; accepted 22 February 2001
Many diving seabirds and marine mammals have been found to regularly exceed their theoretical aerobic dive limit
Z .TADL . No animals have been found to dive for durations that are consistently shorter than their TADL. We attached
Z .time depth recorders to 7 blue whales and 15 fin whales family Balaenopteridae . The diving behavior of both species
was similar, and we distinguished between foraging and traveling dives. Foraging dives in both species were deeper,
longer in duration and distinguished by a series of vertical excursions where lunge feeding presumably occurred.