Singing Behavior, Mating Associations and Reproductive Success in a Population of Hybridizing Lazuli and Indigo Buntings

Baker, Myron Charles; Boylan, Jeanette T.

doi:10.2307/1370179

Cited by 52 publications

(46 citation statements)

References 26 publications

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“…Although there is no direct evidence that hybrid females produce fewer eggs, field studies suggest the possibility. In their field study of mating associations between P. cyanea and P. amoena , Baker & Boylan (1999) tracked the reproductive success of mated pairs in the contact zone over the course of four years. They found that when the female in a pair was a hybrid, the pair had a lower chance of producing eggs than if the female was not a hybrid.…”

Section: Discussionmentioning

confidence: 99%

Speciation inPasserinabuntings: introgression patterns of sex‐linked loci identify a candidate gene region for reproductive isolation

Carling

Brumfield

2009

Molecular Ecology

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Sex-chromosomes are thought to play an important role in speciation, but few studies of non-model organisms have investigated the relative influence of multiple sex-linked markers on reproductive isolation. We collected 222 individuals along a geographical transect spanning the hybrid zone between Passerina amoena and P. cyanea (Aves: Cardinalidae). Using maximum-likelihood cline fitting methods, we estimated locus-specific introgression rates for 10 z-linked markers. Although the cline width estimates ranged from 2.8 to 584 km, eight of 10 loci had cline widths between 224 and 271 km. We also used coalescent-based estimates of locus-specific divergence times between P. amoena and P. cyanea to test a recently proposed hypothesis of an inverse relationship between divergence time and cline width but did not find a significant association. The narrow width (2.8 km) of the cline estimated from the VLDLR9 locus indicates strong selection retarding introgression of alleles at this locus across the hybrid zone. Interestingly, a mutation in the very low density lipoprotein receptor (VLDLR) gene, in which VLDLR9 is an intron, is known to reduce the egg-laying ability of some chickens, suggesting a possible link between this gene region and reproductive isolation between P. amoena and P. cyanea. These results underscore the importance of sampling multiple loci to investigate introgression patterns across a chromosome or genome and support previous findings of the importance of sex-linked genes in speciation.

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Section: Discussionmentioning

confidence: 99%

Speciation inPasserinabuntings: introgression patterns of sex‐linked loci identify a candidate gene region for reproductive isolation

Carling

Brumfield

2009

Molecular Ecology

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“…Cody (1969) used the term ''character convergence'' to describe numerous possible examples of interspecific resemblance in song components and plumage among interspecifically territorial birds (Cody 1969, Cody and Brown 1970, Cody and Walter 1976; see also Grant 1966, Hagen et al 1972, Emlen et al 1975. These examples, however, have since been contradicted by experimental evidence, criticized for a lack of experimental evidence, or found to be complicated by other factors (Grant 1972, Murray 1976, Brown 1977, Martin and Thibault 1996, Baker and Boylan 1999, Scott and Foster 2000. Song sharing between territory neighbors (Wilson and Vehrencamp 2001) may be the only currently accepted example of mimicry among equal competitors.…”

Section: Mimicry Of a Competitormentioning

confidence: 99%

Competitive Mimicry: Synthesis of a Neglected Class of Mimetic Relationships

Rainey

Grether

2007

Ecology

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Abstract. Protective mimicry has been studied extensively for over a century. Mimicry in a competitive context, however, has remained largely neglected. It has been overlooked in mimicry classification schemes, and few systems have been rigorously studied. We define ''competitive mimicry'' as mimicry that enables access to a defended resource or aids in defense of a resource. We explain how competitive mimicry fits with existing mimicry classification schemes and outline criteria for identifying competitive mimicry systems. For each form of competitive mimicry, we describe the effects of the mimic on the model and receiver, predict the evolutionary dynamics of the system, and present examples. We then identify key directions for the study of competitive mimicry.

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“…From this point of view, it seems interesting that song convergence occurs frequently in many secondary contact zones of closely related birds [8], [12], [23], [32], [33]. This raises the question whether song convergence in sympatry could be adaptive in some respects.…”

Section: Introductionmentioning

confidence: 99%

The Causes and Evolutionary Consequences of Mixed Singing in Two Hybridizing Songbird Species (Luscinia spp.)

et al. 2013

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Bird song plays an important role in the establishment and maintenance of prezygotic reproductive barriers. When two closely related species come into secondary contact, song convergence caused by acquisition of heterospecific songs into the birds’ repertoires is often observed. The proximate mechanisms responsible for such mixed singing, and its effect on the speciation process, are poorly understood. We used a combination of genetic and bioacoustic analyses to test whether mixed singing observed in the secondary contact zone of two passerine birds, the Thrush Nightingale (Luscinia luscinia) and the Common Nightingale (L. megarhynchos), is caused by introgressive hybridization. We analysed song recordings of both species from allopatric and sympatric populations together with genotype data from one mitochondrial and seven nuclear loci. Semi-automated comparisons of our recordings with an extensive catalogue of Common Nightingale song types confirmed that most of the analysed sympatric Thrush Nightingale males were ‘mixed singers’ that use heterospecific song types in their repertoires. None of these ‘mixed singers’ possessed any alleles introgressed from the Common Nightingale, suggesting that they were not backcross hybrids. We also analysed songs of five individuals with intermediate phenotype, which were identified as F1 hybrids between the Thrush Nightingale female and the Common Nightingale male by genetic analysis. Songs of three of these hybrids corresponded to the paternal species (Common Nightingale) but the remaining two sung a mixed song. Our results suggest that although hybridization might increase the tendency for learning songs from both parental species, interspecific cultural transmission is the major proximate mechanism explaining the occurrence of mixed singers among the sympatric Thrush Nightingales. We also provide evidence that mixed singing does not substantially increase the rate of interspecific hybridization and discuss the possible adaptive value of this phenomenon in nightingales.

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Singing Behavior, Mating Associations and Reproductive Success in a Population of Hybridizing Lazuli and Indigo Buntings

Cited by 52 publications

References 26 publications

Speciation inPasserinabuntings: introgression patterns of sex‐linked loci identify a candidate gene region for reproductive isolation

Speciation inPasserinabuntings: introgression patterns of sex‐linked loci identify a candidate gene region for reproductive isolation

Competitive Mimicry: Synthesis of a Neglected Class of Mimetic Relationships

The Causes and Evolutionary Consequences of Mixed Singing in Two Hybridizing Songbird Species (Luscinia spp.)

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