Genetic Differentiation in Salamanders of the Desmognathus ochrophaeus Complex (Plethodontidae)

Tilley, Stephen G.; Merritt, Robert B.; Wu, Biao; Highton, Richard

doi:10.2307/2407413

Cited by 38 publications

(42 citation statements)

References 6 publications

(10 reference statements)

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“…Mean values for all Acanthodactylus samples are P = 50%, A = 1.74, H = 0.18. Among vertebrates, a similar genetic heterogeneity is found only in a few Amphibians Tilley et al, 1978). One reptile population (Cnemidophorus) displays a heterozygosity of 14.6% (Gorman et al, 1977).…”

Section: Variability At the Interspecific Levelmentioning

confidence: 81%

High genetic variability of lizards of the sand-dwelling lacertid genus Acanthodactylus

Blanc

Cariou²

1980

Genetica

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Section: Variability At the Interspecific Levelmentioning

confidence: 81%

High genetic variability of lizards of the sand-dwelling lacertid genus Acanthodactylus

Blanc

Cariou²

1980

Genetica

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“…In the southern Appalachian Mountains of the eastern United States this species consists of many disjunct populations among which there is considerable genetic differentiation, striking variation in body size, life history, and color pattern and, for two of them, significant, though incomplete, ethological isolation (4,6). We here report on the extent and nature of variation in levels ofethological isolation among southern Appalachian D. ochrophaeus populations and specifically address two questions: is the extent of ethological isolation correlated with the degree of allozyme divergence among populations, and how do these two manifestations of evolutionary divergence relate to geographic distances among populations?…”

mentioning

confidence: 99%

Correspondence between sexual isolation and allozyme differentiation: a test in the salamander Desmognathus ochrophaeus.

Tilley

Verrell

Arnold

1990

Proc. Natl. Acad. Sci. U.S.A.

133

147

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Ethological reproductive isolation and genetic divergence across 26 protein loci were measured among populations of the salamander Desmognathus ochrophaeus in the southern Appalachian Mountains. Levels of ethological isolation varied from none to complete and were statistically significant for all but two pairings between populations inhabiting different mountain ranges. When geographic and genetic distances were treated as independent variables in multiple correlation analyses, they accounted for about halfthe variance in levels of ethological isolation. When genetic distance is held constant, the remaining relationship between ethological isolation and geographic distance is still statistically significant. When geographic distance is held constant, the remaining relationship between genetic distance and levels of ethological isolation is nonsignificant, as is the relationship between geographic distance and genetic distance when ethological isolation is held constant. Ethological isolation and genetic divergence evidently both reflect the gradual divergence of allopatric populations, but genetic distance is a poor predictor of ethological isolation in these salamanders.

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“…A phylogenetic hypothesis for the subfamily is available (see Larson, 2001) based on studies of molecular markers reported by Titus & Larson (1996) and Tilley & Mahoney (1996).…”

Section: Methodsmentioning

confidence: 99%

Sexual behaviour of the Black Mountain dusky salamander (Desmognathus welteri), and the evolutionary history of courtship in the Desmognathinae

Verrell

Mabry

2003

Journal of Zoology

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Plethodontid salamanders of the North American subfamily Desmognathinae offer excellent opportunities for an integrative understanding of the form, functions and phylogeny of sexual behaviour patterns. The first description of courtship in the Black Mountain dusky salamander Desmognathus welteri is presented. Once oriented toward their partners, males produce multiple tactile, visual and chemical stimuli that probably function to stimulate, or 'persuade', females to mate. Persuasion is accomplished by behaviour patterns that include head rubbing, butterfly, pulling and snapping, and perhaps nudging and tail undulation. Sperm transfer is indirect by a spermatophore that is deposited on the substrate during a sequence of behaviour patterns involving both sexes known as tail-straddling walk. Fine-scale synchronization and orientation of partners at this time is crucial for successful insemination. The evolutionary histories of eight sexual behaviour patterns for 19 taxa of desmognathine salamanders are then reconstructed. Our phyloethological analyses suggest that the courtship of desmognathines consists of a mosaic of ancestral (plesiomorphic) and derived (apomorphic) behavioural traits. The greatest variation among taxa involves behaviour patterns that are exhibited early in sexual encounters as, or shortly after, males orient toward females. Behaviour patterns that occur at closer range and most obviously are persuasive in function show less variation among taxa, and those that lead to sperm transfer (tail-straddling walk) are invariant. While our phyloethological analyses reveal aspects of the evolutionary history of behavioural form in the Desmognathinae, further work is needed before thorough analyses of behavioural functions can be conducted.

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Genetic Differentiation in Salamanders of the Desmognathus ochrophaeus Complex (Plethodontidae)

Cited by 38 publications

References 6 publications

High genetic variability of lizards of the sand-dwelling lacertid genus Acanthodactylus

High genetic variability of lizards of the sand-dwelling lacertid genus Acanthodactylus

Correspondence between sexual isolation and allozyme differentiation: a test in the salamander Desmognathus ochrophaeus.

Sexual behaviour of the Black Mountain dusky salamander (Desmognathus welteri), and the evolutionary history of courtship in the Desmognathinae

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