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2014 ; 97
(ä): 1-12
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Male mate preferences in mutual mate choice: finches modulate their songs across
and within male-female interactions
#MMPMID25242817
Heinig A
; Pant S
; Dunning J
; Bass A
; Coburn Z
; Prather JF
Anim Behav
2014[Oct]; 97
(ä): 1-12
PMID25242817
show ga
Male songbirds use song to advertise their attractiveness as potential mates, and
the properties of those songs have a powerful influence on female mate
preferences. One idea is that males may exert themselves maximally in each song
performance, consistent with female evaluation and formation of mate preferences
being the primary contributors to mate choice. Alternatively, males may modulate
their song behaviour to different degrees in the presence of different females,
consistent with both male and female mate preferences contributing to mutual mate
choice. Here we consider whether male Bengalese finches, Lonchura striata
domestica, express mate preferences at the level of individual females, and
whether those preferences are manifest as changes in song behaviour that are
sufficient to influence female mate choice. We tested this idea by recording
songs performed by individual unmated males during a series of 1 h interactions
with each of many unmated females. Across recording sessions, males
systematically varied both the quantity and the quality of the songs that they
performed to different females. Males also varied their song properties
throughout the course of each interaction, and behavioural tests using female
birds revealed that songs performed at the onset of each interaction were
significantly more attractive than songs performed by the same male later during
the same interaction. This demonstration of context-specific variation in the
properties of male reproductive signals and a role for that variation in shaping
female mate preference reveals that male mate preferences play an important role
in mutual mate choice in this species. Because these birds thrive so well in the
laboratory and are so amenable to observation and experimentation across
generations, these results yield a new model system that may prove especially
advantageous in disentangling the role of male and female mate preferences in
shaping mutual mate choice and its long-term benefits or consequences.