Diets of Baird's Beaked Whales, Berardius
bairdii, in the southern Sea Of Okhotsk and off the Pacific coast of Honshu, Japan.
There were only 6 sightings of beaked whales, but all 3 genera (Ziphius, Berardius, and Mesoplodon) known to be present off Southern California were detected.
Baird's beaked whale Berardius bairdii Stejneger, 1883: Arnoux's beaked whales Berardius arnuxii Duvernoy, 1851.
The absence of California sightings for two beaked whale genera (Mesoplodon and Berardius
, Table 7) since 1996 is disconcerting, especially in light of recent discoveries about the susceptibility of this group to loud anthropogenic sounds (Simmonds and Lopez-Jurado, 1991; Cox et al.
Julian and Beeson (1998) reported a total of 20 Cuvier's beaked whales, Ziphius cavirostris; one Baird's beaked whale, Berardius
bairdii; one Stegneger's beaked whale, Mesoplodon stegnegerii; five Hubb's beaked whales, Mesoplodon hubbsi; two unidentified mesoplodont beaked whales, Mesoplodon sp.
longirostris (4%) (Dizon et al, 1991), between Mesoplodon, Berardius
and Hyperoodon (4.
In odontocete males, these characteristics are present in the form of "weapons," such as the tusk of the narwhal (Monodon monoceros) and the teeth in species of the genus Grampus, Physeter, Berardius
, Hyperoodon, and Mesoplodon used in male-male combats (MacLeod, 1998).