TY - JOUR
T1 - Subspecies discrimination on the basis of acoustic signals
T2 - a playback experiment in a Neotropical songbird
AU - Demko, Alana D.
AU - Sosa-López, J. Roberto
AU - Mennill, Daniel J.
N1 - Publisher Copyright:
© 2019 The Association for the Study of Animal Behaviour
PY - 2019/11
Y1 - 2019/11
N2 - When animal mating signals diverge between populations, reproductive isolation and speciation may occur. Variation in animals' responses to these signals may reveal whether differences in perception contribute to behavioural differences between populations. We tested whether signal divergence influences receiver responses to playback in the rufous-capped warbler, Basileuterus rufifrons, a Neotropical resident songbird with a contact zone between two divergent subspecies, B. r. delattrii and B. r. rufifrons, in southern Mexico. Studying nearby populations of birds living in allopatry and sympatry, we presented warblers with playback-simulated territorial male rivals of each subspecies. In sympatry, both delattrii and rufifrons responded more strongly to songs of their own subspecies than to songs of the other subspecies, whereas in allopatry, delattrii responded strongly to songs of both subspecies, suggesting possible reproductive character displacement. Our research demonstrates that sympatric delattrii and rufifrons discriminate between each other's songs, suggesting that song is a premating isolating barrier between these divergent subspecies. This study adds to the growing literature on receiver response to vocal signal divergence in closely related sympatric and allopatric animal populations.
AB - When animal mating signals diverge between populations, reproductive isolation and speciation may occur. Variation in animals' responses to these signals may reveal whether differences in perception contribute to behavioural differences between populations. We tested whether signal divergence influences receiver responses to playback in the rufous-capped warbler, Basileuterus rufifrons, a Neotropical resident songbird with a contact zone between two divergent subspecies, B. r. delattrii and B. r. rufifrons, in southern Mexico. Studying nearby populations of birds living in allopatry and sympatry, we presented warblers with playback-simulated territorial male rivals of each subspecies. In sympatry, both delattrii and rufifrons responded more strongly to songs of their own subspecies than to songs of the other subspecies, whereas in allopatry, delattrii responded strongly to songs of both subspecies, suggesting possible reproductive character displacement. Our research demonstrates that sympatric delattrii and rufifrons discriminate between each other's songs, suggesting that song is a premating isolating barrier between these divergent subspecies. This study adds to the growing literature on receiver response to vocal signal divergence in closely related sympatric and allopatric animal populations.
KW - Basileuterus rufifrons
KW - character displacement
KW - playback experiment
KW - rufous-capped warbler
KW - song variation
UR - http://www.scopus.com/inward/record.url?scp=85072603170&partnerID=8YFLogxK
U2 - 10.1016/j.anbehav.2019.08.021
DO - 10.1016/j.anbehav.2019.08.021
M3 - Artículo
SN - 0003-3472
VL - 157
SP - 77
EP - 85
JO - Animal Behaviour
JF - Animal Behaviour
ER -