Asymmetric discrimination of geographical variation in song in a migratory passerine

Colbeck, Gabriel J.; Sillett, T. Scott; Webster, Michael S.

doi:10.1016/j.anbehav.2010.05.013

Cited by 34 publications

(34 citation statements)

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“…Overall, these results indicate, on one hand, that lizards do not require a previous exposition to heterotypic distress calls to react to them, and second, that populations seem not to be equally tuned to their calls, resulting in an asymmetrical non‐local response to distress calls (Colbeck et al. ).…”

Section: Discussionmentioning

confidence: 78%

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Asymmetric Response to Heterotypic Distress Calls in the Lizard Liolaemus chiliensis

2016

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The weeping lizard, Liolaemus chiliensis, emits distress calls when trapped by a predator. Conspecific lizards respond to such calls with prolonged immobility, which may increase their probability of remaining undetected by a predator. This benefit, however, depends on the ability to react to the alert message of the call, which may be impaired by natural variation in the calls. The distress calls of L. chiliensis show geographic variation, and here we tested the response of two geographically distant populations (>700 km apart) to local (homotypic) and non‐local (heterotypic) distress calls; if populations are finely tuned to their local calls, they may not be able to respond to heterotypic calls. We found that geographic variation in calls affects the lizards’ response, but this effect was population dependent; whereas southern lizards responded to calls of both populations, the northern lizards only reacted to homotypic distress calls. The factors that determine this asymmetric response to heterotypic calls are unclear and we discuss three hypotheses that have a common component in the difference in body size between the tested populations, which seems to play a key role in determining the response to distress calls in this species.

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Section: Discussionmentioning

confidence: 78%

“…Finally, populations may experience different selective pressures, that cause an asymmetric ability to respond to heterotypic stimuli (Colbeck et al. ).…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Response to Heterotypic Distress Calls in the Lizard Liolaemus chiliensis

2016

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“…Recognition failure may be exacerbated if ustulatus signals, optimized for coastal rainforest habitat, do not transmit well in drier, interior swainsoni habitat. If a recognition failure is responsible for the asymmetrical response to song playbacks, then previous research suggests that the strength of the males response should decrease with increasing dissimilarity of the challenger’s signal (Nelson, 1988; Dabelsteen & Pedersen, 1992; Colbeck et al. , 2010).…”

Section: Discussionmentioning

confidence: 99%

Differences in timing of migration and response to sexual signalling drive asymmetric hybridization across a migratory divide

Ruegg

Anderson

Slabbekoorn

2012

J of Evolutionary Biology

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Ecological traits and sexual signals may both contribute to the process of ecological speciation. Here we investigate the roles of an ecological trait, seasonal migratory behaviour and a sexual trait, song, in restricting or directing gene flow across a migratory divide in the Swainson’s thrush (Catharus ustulatus). We show that short‐distance migratory ecotypes wintering in Central America arrive earlier at the breeding grounds than long‐distance migratory ecotypes wintering primarily in South America, providing the potential for some premating isolation. Playback experiments suggest that early‐ and late‐arriving forms recognize each other as competitors, but that the early‐arriving form responds more aggressively to a broader spectrum of stimuli. Genetic analysis suggests that hybridization occurs more often between males of the early‐arriving ecotype and females of the late‐arriving ecotype. Together our results suggest that differences in arrival times may reduce the temporal coincidence of mate choice, but asymmetry in response to heterotypic song may hinder complete divergence. These data provide further insight into the roles of ecological traits and sexual signals during the incipient stages of speciation.

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“…First, only 5 different sets of high-and low-elevation playback stimuli were used. Some research suggests that males may be more responsive to other male intruders prior to egg laying, when lost paternity still is a relevant concern (Langeman et al 2000;Otter et al 2002;Colbeck et al 2010). In addition, when stimulus set was included in the mixed model as a random factor, it did not explain the variation present in male responses (Table 1).…”

Section: Discussionmentioning

confidence: 99%

Do Male Mountain Chickadees Discriminate between Local and Non‐Local Elevation Intruders?

Branch

Pravosudov

2016

Ethology

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Song in temperate songbirds is typically learned from local males and commonly thought to function in mate choice and male–male competition. Because male song is learned locally and is phenotypically plastic, it often varies geographically and may serve as a cue for an individual's location of origin. In montane environments, environmental heterogeneity occurs across the elevation gradient, potentially leading to local adaptations on rather small spatial scales. If local adaptations are associated with restricted movements between elevations, this leads to the question of whether individuals can discriminate between birds from the same vs. different elevations. Mountain chickadees inhabiting high and low elevations are known to differ in numerous phenotypic traits, including male song structure. In addition, we previously reported that female high‐elevation mountain chickadees can discriminate between local and non‐local elevation males and here, we tested whether males also respond differentially to high‐ vs. low‐elevation male territory intruders. Playback stimuli were presented to resident high‐ (N = 24) and low‐ (N = 20) elevation males at our previously established study sites during spring to compare the males' behavioral responses to high‐ and low‐elevation male song playbacks. Both high‐ and low‐elevation males responded similarly to both types of playback stimuli, suggesting that they do not differentially respond to male intruders from their location of origin compared to non‐local males. These results are considered in the framework of our previous findings and the larger body of literature, which suggests that male songbirds readily discriminate between local and non‐local male intruders.

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Asymmetric discrimination of geographical variation in song in a migratory passerine

Cited by 34 publications

References 50 publications

Asymmetric Response to Heterotypic Distress Calls in the Lizard Liolaemus chiliensis

Asymmetric Response to Heterotypic Distress Calls in the Lizard Liolaemus chiliensis

Differences in timing of migration and response to sexual signalling drive asymmetric hybridization across a migratory divide

Do Male Mountain Chickadees Discriminate between Local and Non‐Local Elevation Intruders?

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