000			01935nab a22002657a 4500
003			EC-PaCDF
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008			170816t20102010xxu|||||||||||||||||eng||
040			_aEC-PaCDF
041			_aeng
082	0	4	_221 _a598.883
100	1		_aBrumm, Henrik.
245	1	0	_aEvolutionary Dead End in the Galápagos: _bDivergence of Sexual Signals in the Rarest of Darwin’s Finches.
520	0		_aUnderstanding the mechanisms underlying speciation remains a challenge in evolutionary biology. The adaptive radiation of Darwin’s finches is a prime example of species formation, and their study has revealed many important insights into evolutionary processes. Here, we report striking differences in mating signals (songs), morphology and genetics between the two remnant populations of Darwin’s mangrove finch Camarhynchus heliobates, one of the rarest species in the world. We also show that territorial males exhibited strong discrimination of sexual signals by locality: in response to foreign songs, males responded weaker than to songs from their own population. Female responses were infrequent and weak but gave approximately similar results. Our findings not only suggest speciation in the mangrove finch, thereby providing strong support for the central role of sexual signals during speciation, but they have also implications for the conservation of this iconic bird. If speciation is complete, the eastern species will face imminent extinction, because it has a population size of only 5–10 individuals.
546			_aEnglish
653			_aDarwin’s Finches.
653			_aPinzones de Darwin.
653			_aCamarhynchus heliobates.
700	1		_aFarrington, Heather. _9955
700	1		_aPetren, Kenneth. _9956
700	1		_aFessl, Birgit. _92278
773	0		_gVol. 5, no. 5 (June 2010), p. 1-7 _tPLOS ONE.
856			_uhttp://dx.doi.org/10.1371/journal.pone.0011191
942			_2ddc _cARTICLE
999			_c13113 _d13113