Biology Reference
In-Depth Information
Fig. 4.4
Representation of the effect of amplitude variation and environmental degradation
(represented by size of
arrows
) on receiver with increase of distance of the sender
Fig. 4.5
Undegraded (
a
)
and artificially degraded (
b
)
song of the Carolina wren
(
Thryothorus ludovicianus
).
The degradation is similar
to a song perceived at a
distance of 50 m
(Reproduced with
permission from Naguib
1996
)
to distinguish the overall amplitude, reverberation, and the relative intensity atten-
uation of high frequencies (Naguib
1995
). In this way this species has at least two
mechanisms available to assess ranging in a variable environment and to defend
territories efficiently in habitats with different sonic properties.
Search WWH ::
Custom Search