Song Dialects and Genetic Differences in White-Crowned Sparrows (Zonotrichia leucophrys)

Baker, Myron Charles

doi:10.2307/2407210

Cited by 88 publications

(78 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Data consistent with these predictions have been presented previously (Baker, 1975;Baker and Mewaldt, 1978). Yet the dialect population is often extensive in comparison to the distribution of dispersal distances suggesting that a dialect population may not be panmictic.…”

Section: Introductionsupporting

confidence: 80%

“…nuttalli should exhibit strong genetic heterogeneity. The patterns that do exist in electrophoretically detectable enzyme polymorphisms (Baker, 1975) The observed F, of 00046 (from allozyme frequencies) may also be compared to that expected from the effective size of a neighbourhood, calculated earlier to be 36. The theory for calculating this expected value of F5, is due to Wright (1951).…”

Section: Discussior'imentioning

confidence: 80%

See 1 more Smart Citation

Effective population size in a songbird: some possible implications

Baker

1981

Heredity

Self Cite

View full text Add to dashboard Cite

SUMMARYSong dialects in White-crowned Sparrows (Zonotrichia leucophrys nuttalli) may act as partial barriers to the tree exchange of genes. Within a dialect population, a genetic neighbourhood comprises about 100 individuals. Other factors combine to reduce the effective number to less than 50. By Wright's methods, the genetic divergence among subpopulations (Fr,) expected in a population exhibiting this size effective number with neutral alleles is about an order of magnitude larger than the observed F,, calculated from electrophoretically detectable alleles. Natural selection may therefore be maintaining greater homogeneity within a dialect than expected by assuming that alleles are neutral. From the torus model of Maruyama, however, the expected F,, values are close to those observed, suggesting no major departures from panmixia within dialect popuiations. The degree of genetic isolation exhibited between dialect populations may provide an explanation for the more rapid rate of speciation in passerine birds.

show abstract

Section: Introductionsupporting

confidence: 80%

Section: Discussior'imentioning

confidence: 80%

Effective population size in a songbird: some possible implications

Baker

1981

Heredity

Self Cite

View full text Add to dashboard Cite

show abstract

“…In addition to the role of song in mate selection at the species level, female mate preferences may also be influenced by intraspecific variation in song (figure 1). It has long been suggested that preferences for a local dialect may lead to reproductive divergence and potentially speciation (Marler & Tamura 1962;Nottebohm 1969;Baker 1975;Baptista 1975;Baker & Mewaldt 1978). However, an extensive search for assortative mating based on intraspecific acoustic variation has led to a large number of studies with conflicting results.…”

Section: Introductionmentioning

confidence: 99%

Bird song, ecology and speciation

Slabbekoorn

Smith

2002

Phil. Trans. R. Soc. Lond. B

485

413

View full text Add to dashboard Cite

The study of bird song dialects was once considered the most promising approach for investigating the role of behaviour in reproductive divergence and speciation. However, after a series of studies yielding conflicting results, research in the field slowed significantly. Recent findings, on how ecological factors may lead to divergence in both song and morphology, necessitate a re-examination. We focus primarily on species with learned song, examine conflicting results in the literature and propose some potential new directions for future studies. We believe an integrative approach, including an examination of the role of ecology in divergent selection, is essential for gaining insight into the role of song in the evolution of assortative mating. Habitat-dependent selection on both song and fitness-related characteristics can lead to parallel divergence in these traits. Song may, therefore, provide females with acoustic cues to find males that are most fit for a particular habitat. In analysing the role of song learning in reproductive divergence, we focus on post-dispersal plasticity in a conceptual framework. We argue that song learning may initially constrain reproductive divergence, while in the later stages of population divergence it may promote speciation.

show abstract

“…1 -Distribution of the dialects in the study area. songs in the border area between dialects (Baker 1974, Baker and Thompson 1985, Baptista and King 1980, but hybrid songs were not found in Z. capensis; perhaps the simple structure of its song cannot reflect its hybrid origin.…”

Section: Discussionmentioning

confidence: 98%

“…Studies of geographic song variation and vocal dialects have been conducted for a long time in North America, mostly on the White-crowned Sparrow Zonotrichia leucophrys (Baker 1974, Baptista 1977. Argentine populations of its Neotropical relative, the Rufous-collared Sparrow Zonotrichia capensis, were studied by Nottebohm (1975), but the Brazilian populations of this species are little known.…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of the song of the Rufous-collared Sparrow Zonotrichia capensis (Emberizidae) between Campinas and Botucatu, São Paulo State, Brazil

Avelino

Vielliard

2004

An. Acad. Bras. Ciênc.

View full text Add to dashboard Cite

At the other two localities, they sang up to 5 different song types. This occurs at the boundaries of the regiolects, and was also where individuals singing more than one song type were found. Similarities between song types were not related to geographic distance between the respective singers. A comparative analysis showed similarities in these regiolects with song of populations from Northeastern Brazil.

show abstract

Song Dialects and Genetic Differences in White-Crowned Sparrows (Zonotrichia leucophrys)

Cited by 88 publications

References 6 publications

Effective population size in a songbird: some possible implications

Effective population size in a songbird: some possible implications

Bird song, ecology and speciation

Comparative analysis of the song of the Rufous-collared Sparrow Zonotrichia capensis (Emberizidae) between Campinas and Botucatu, São Paulo State, Brazil

Contact Info

Product

Resources

About