1. Overview
7
KIller Whale
(OrcJnus orca)
AUantie Bottlenose Dolphin
~ . (Tuunrs.,iooppss truneatus)
.
Risso's Dolphin
~
(Grampusgrfseus)
:. . '.-.~' .. ·~azonRiVerDoIPhln ~
~ (/ni. Geoffrensis) : ~ Chinese River DOlphin
_
-~
.. . _
(Lepotes vexiltifer)
!ueuxi •
Harbor Porpoise
(Sot.lia flUViatilis)
(Phoeoena ph ocoena)
FIGURE 1.3. Pictorial diagram showing the relative sizes of all the odontocetes
(except for T. gilli) whose audiograms are shown in Figure 2.
the effects of increasing pressure may affect the auditory capabilities of
these animals. P. catodon dive to much deeper depths; a whale carrying a
sonar transponder dove as deep as 2km (Watkins et al. 1993). Ridgway et
al. (1998) recently measured the hearing sensitivity of two D. Leucas at
7
KIller Whale
(OrcJnus orca)
AUantie Bottlenose Dolphin
~ . (Tuunrs.,iooppss truneatus)
.
Risso's Dolphin
~
(Grampusgrfseus)
:. . '.-.~' .. ·~azonRiVerDoIPhln ~
~ (/ni. Geoffrensis) : ~ Chinese River DOlphin
_
-~
.. . _
(Lepotes vexiltifer)
!ueuxi •
Harbor Porpoise
(Sot.lia flUViatilis)
(Phoeoena ph ocoena)
FIGURE 1.3. Pictorial diagram showing the relative sizes of all the odontocetes
(except for T. gilli) whose audiograms are shown in Figure 2.
the effects of increasing pressure may affect the auditory capabilities of
these animals. P. catodon dive to much deeper depths; a whale carrying a
sonar transponder dove as deep as 2km (Watkins et al. 1993). Ridgway et
al. (1998) recently measured the hearing sensitivity of two D. Leucas at