Paternity and performance of golden-winged warblers (Vermivora chrysoptera) and golden-winged X blue-winged warbler (V. pinus) hybrids at the leading edge of a hybrid zone

Vallender, Rachel; Friesen, Vicki L.; Robertson, Raleigh J.

doi:10.1007/s00265-007-0413-3

Cited by 36 publications

(47 citation statements)

References 42 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%

“…data; eastern Manitoba: L. Moulton unpubl. data), wbereas renesting is common in Ontario (Vallender et al 2007a). Combined with the higher rates of parasitic infection, the populations in Manitoba may face fitness cballenges compared witb populations in Ontario and Quebec.…”

Section: Discussionmentioning

confidence: 99%

“…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.…”

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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: 99%

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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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“…Indeed, Mennill et al (2002) found that a song can function as both mate attraction and territory defense simultaneously. bREEDINg bIOlOgY golden-winged Warblers are known to produce broods of mixed paternity via extra-pair fertilizations (Reed et al 2007, Vallender et al 2007a. Moreover, golden-winged Warblers regularly hybridize and produce fertile offspring with the congeneric blue-winged Warbler (V. pinus;gill 1980gill , Neville et al 2008.…”

Section: Study Species' Songmentioning

confidence: 99%

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

Harper

Vallender

Robertson

2010

Condor

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Resumen. Investigamos los rasgos distintivos de los cantos de los machos y la relación entre las variables de los cantos y la selección de pareja por parte de las hembras en Vermivora chrysoptera. Registramos y cuantificamos los cantos de 23 machos para examinar los rasgos vinculados con el desempeño y los contenidos específicos de cada canto. Realizamos análisis de función discriminante para comparar la variación en un mismo macho y entre machos de las características de los canto tipo I y II. Empleamos ADN microsatelital para identificar a los padres de 62 pichones provenientes de 17 nidos. Mediante la asignación de paternidad a los machos de nuestra población, pudimos examinar la relación entre la elección de las hembras y las variaciones en los cantos de los machos comparando las características de los progenitores de una pareja y los externos a las parejas. A pesar de que fuimos capaces de discriminar estadísticamente entre los cantos individuales de los machos, no encontramos diferencias significativas en las variables de los cantos entre los machos de una pareja y los externos a las parejas para un nido determinado. Por ende, las hembras de V. chrysoptera no parecen estar usando estas diferencias en los cantos para elegir a su pareja. Se necesita más investigación sobre V. chrysoptera para entender la función del canto y para mejorar los conocimientos de la biología reproductiva de la especie. Ambas líneas de investigación pueden tener implicancias importantes para la conservación de esta especie cuyas poblaciones están disminuyendo. MAlE SONg VARIATION AND FEMAlE MATE ChOICE IN ThE gOlDEN-WINgED WARblERVariación del Canto en Machos y Selección de Pareja por parte de la hembra en Vermivora chrysoptera Abstract. We investigated the distinctiveness of males' song and the relationship between song variables and females' mate choice in the golden-winged Warbler (Vermivora chrysoptera). We recorded the songs of 23 males and quantified them to examine performance-related traits and specific song content. We carried out discriminant function analysis to compare variation within and among males for characteristics of both song types I and II. We used microsatellite DNA to identify the parents of 62 nestlings from 17 nests. by assigning paternity to males in our population we could examine relationships between females' choice and variation in males' song by comparing characteristics of within-and extra-pair sires. While we were able to discriminate statistically between individual males' songs, we found no significant differences in song variables between the within-and extra-pair males at a given nest. Therefore, female golden-winged Warblers do not appear to be using these differences in song in choosing a mate. Further research on the golden-winged Warbler is needed to understand song function and to gain insight into this species' reproductive biology, both of which could have important conservation implications for this declining species.

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“…Vallender et al (2007) reported a high rate of GWWA intraspecies extra pair matings and suggested this might also be common with the BWWA. Hybridization between the two species has received extensive phenotypic (Parkes 1951, Gill 1980, 1987, mitochondrial DNA (mtDNA) (Gill 1997, Shapiro et al 2004, Dabrowski et al 2005, and nuclear DNA ) study indicating genetic introgression is bi-directional (Shapiro et al 2004, Dabrowski et al 2005) and extensive (Vallender et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Fire created habitat partitioning and isolation between hybridizing warblers

King¹,

Boysen²,

Brenneman³

et al. 2015

Ecosphere

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Abstract. Hybridization or the breakdown of reproductive barriers has perplexed conservationists for centuries. Hybridization between the golden-winged warbler (Vermivora chrysoptera) and blue-winged warbler (Vermivora cyanoptera) has received extensive study across North America for more than a century and indicates widespread, bi-directional genetic introgression. We found evidence fire is creating habitat conditions leading to isolation between nesting golden-winged warblers and blue-winged warblers. This effect is likely the result of fire's ability to promote grass cover and suppress woody plants, leading to habitat use partitioning between golden-winged warblers and blue-winged warblers. In addition to minimizing contact between the species, fire is creating habitat conditions on mixed sites that greatly favors golden-winged warblers over blue-winged warblers. Fire provides a plausible explanation for the original split in these sister species and its near elimination from eastern North America provides at least a partial explanation for the golden-winged warbler's extensive range-wide decline. Fire also provides a potential conservation tool by isolating golden-winged warbler and blue-winged warbler nesting populations. If nesting populations can be isolated, relatively rapid phenotypic sorting can be achieved, which could lead to a clearer distinction between the taxa as well as species preservation.

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Paternity and performance of golden-winged warblers (Vermivora chrysoptera) and golden-winged X blue-winged warbler (V. pinus) hybrids at the leading edge of a hybrid zone

Cited by 36 publications

References 42 publications

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

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

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

Fire created habitat partitioning and isolation between hybridizing warblers

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