Male Song Variation and Female Mate Choice in the Golden-Winged Warbler

Harper, Sherilee L.; Vallender, Rachel; Robertson, Raleigh J.

doi:10.1525/cond.2010.080093

Cited by 5 publications

(7 citation statements)

References 46 publications

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“…The lack of difference in infection rates in Golden-winged Warblers and bybrids (Table 2) is consistent witb recent work tbat suggested tbe absence of postzygotic selection against bybrids in the Golden-winged x Blue-winged warbler bybridization system (e.g.. Reed et al 2007, Vallender et al 2007a, Harper et al 2010. Higher parasite abundance in hybrids in other systems has suggested tbat disturbances in genetically based resistance may result from bybridization (Strauss 1994).…”

Section: Discussionsupporting

confidence: 84%

“…Differences in infection rates across the geographic range of a species may indicate differential exposure to vectors because of differences in microhabitat or microclimate preferences, rainfall, or both (Möller et al 2004, Valkiünas 2005, Ishak et al 2008). Comparisons of rainfall at the five study sites in May, June, and July 2009and 2010witb tbat in 2007 sbowed no differences by year or by study site (data not sbown).…”

Section: Discussionmentioning

confidence: 91%

“…To date, this has been examined in relation to the ability to attract mates ofthe parentat species through the use of song by males (Harper et al 2010), to produce viabte offspring (Vallender et al 2007a), to produce clutches of balanced sex ratio (i.e., not biased toward the homogametic sex, in accordance with Hatdane's rute; Nevitle et al 2008), and to successfutty fledge young (Reed et at. 2007, Valtender et at.…”

mentioning

confidence: 99%

“…Model-averaged parameter estimates (± SE) and odds ratios with unconditional 95% confidence intervals (in parentheses) for the covariates identified as affecting the avian malaria infection status ofGolden-winged Warblers in Canada, 2009-2010 …”

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confidence: 99%

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Blood parasite infection and heterozygosity in pure and genetic-hybrid Golden-winged Warblers (Vermivora chrysoptera) across Canada

Vallender

Bull

Moulton

et al. 2012

The Auk

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We examined beterozygosity at bypervariable microsatellite loci and blood parasite presence-absence in five populations of Golden-winged Warblers {Vermivora chrysoptera) tbat span tbe species' Canadian range. All populations were predominantly composed of genetically pure individuals, witb small proportions of pbenotypic and genetic bybrids. By comparing beterozygosity and infection status in concert, we tested wbether more-heterozygous individuals bave lower parasite prevalence, perbaps because tbey possess a more robust immune system. By considering tbe genetic status (pure vs. bybrid) of individuals in relation to infection by parasites and beterozygosity, we build on existing researcb tbat examines tbe effect of Blue-winged Warbler {V. cyanoptera) hybridization on Golden-winged Warbler populations. Finally, by looking at populations across tbe east-west range of tbe species, we could bypotbesize what role geographic variation in vectors might play in population-level infection rates. We found no difference in infection probability between pure and bybrid individuals, but a greater frequency of infection in populations in the western portion of tbe range. Our results add to tbe growing evidence tbat bybrids in this system do not face postzygotic selection, and tbat Golden-winged Warblers breeding in the most northwestern extent of their range may face challenges that could impede their conservation. Ongoing work that compares reproductive success of Ontario and Manitoba populations is likely to add an important dimension to our findings and could furtber inform conservation efforts for tbe species. Infección por Parásitos Sanguineos y Heterocigosidad en Lineas Genéticamente Puras e Híbridas deVermivora chrysoptera en Canadá RESUMEN.-Examinamos la beterocigosidad en loci microsatelitales bipervariables y la presencia/ausencia de parásitos en la sangre de cinco poblaciones de Vermivora chrysoptera a lo largo del área de distribución de la especie en Canadá. Todas las poblaciones estuvieron compuestas predominantemente por individuos genéticamente puros, con pequeñas proporciones de bíbridos genotípicos y morfológicos. Mediante la comparación de la heterocigosidad con el estado de infección, evaluamos si los individuos más heterocigotos tienen menor prevalencia de parásitos, tal vez debido a que poseen un sistema inmune más robusto. Al considerar el estado genético (puro vs. bíbrido) de los individuos en relación con la infección parasitaria y la beterocigosidad, aprovecbamos las investigaciones ya existentes sobre el efecto de la bibridación con V. cyanoptera en las poblaciones de V. chrysoptera. Finalmente, mediante el análisis de poblaciones localizadas a lo largo del sector oriente-occidente de la distribución de esta especie, podemos proponer bipótesis sobre cuál es el efecto que puede tener la variación geográfica de los vectores sobre las tasas de infección especificas de cada población. No encontramos diferencias en la probabilidad de infección entre individuos puros e bibridos, pero si una mayor frecuenc...

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 91%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Blood parasite infection and heterozygosity in pure and genetic-hybrid Golden-winged Warblers (Vermivora chrysoptera) across Canada

Vallender

Bull

Moulton

et al. 2012

The Auk

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“…Similarly, Harper et al. () observed a Golden‐winged Warbler ( Vermivora chrysoptera ) using its First Category song during the dawn chorus and its Second Category song later in the day, in reverse of the normal pattern. There is some evidence that context‐appropriate use of wood‐warbler song categories is a learned behavior (Spector et al.…”

Section: Discussionmentioning

confidence: 90%

Interspecific song imitation by a Prairie Warbler

Byers

Kramer

Akresh

et al. 2013

Journal of Field Ornithology

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Song development in oscine songbirds relies on imitation of adult singers and thus leaves developing birds vulnerable to potentially costly errors caused by imitation of inappropriate models, such as the songs of other species. In May and June 2012, we recorded the songs of a bird that made such an error: a male Prairie Warbler (Setophaga discolor) in western Massachusetts that sang songs seemingly acquired by imitating the songs of a Field Sparrow (Spizella pusilla). Another song type in the bird's repertoire was a near‐normal Group A Prairie Warbler song, but the bird used this song in contexts normally reserved for Group B songs. Despite its abnormal singing behavior, the aberrant bird successfully defended a territory and attracted a mate that laid two clutches of eggs. Results of playbacks of the focal bird's heterospecific song suggested that neighboring conspecific males learned to associate the Field Sparrow‐like song with the focal male, and responded to the song as if it were a Prairie Warbler song. Our evidence suggests that the focal bird's aberrant singing evoked normal responses from potential mates and rivals. If such responses are widespread among songbirds, the general failure of heterospecific songs, once acquired, to spread through populations by cultural transmission is probably not attributable to a lack of recognition by conspecifics of the songs of heterospecific singers.

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