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SPECIATIONAL HISTORY OF AUSTRALIAN GRASS FINCHES (POEPHILA) INFERRED FROM THIRTY GENE TREES*
Estimates of population divergence times and ancestral population sizes of three closely related species of Australian grass finches distributed across two barriers in northern Australia strongly support Pleistocene timing for both speciation events, despite the fact that many gene divergences across the Carpentarian region clearly predated the pleistocene.
Speciation in birds: Genes, geography, and sexual selection
- S. Edwards, S. Kingan, M. Sorenson
- BiologyProceedings of the National Academy of Sciences…
- 25 April 2005
The challenge for ornithologists is to inform well studied examples of speciation in nature with increased molecular resolution—to clone speciation genes if they exist—and thereby evaluate the relative roles of extrinsic, intrinsic, deterministic, and stochastic causes for avian diversification.
Systematics of the lizard family pygopodidae with implications for the diversification of Australian temperate biotas.
We conducted a phylogenetic study of pygopodid lizards, a group of 38 species endemic to Australia and New Guinea, with two major goals: to reconstruct a taxonomically complete and robustly supported…
Dependence of the garter snake Thamnophis elegans on amphibians in the Sierra Nevada of California
Shifts in the Relative Abundance of Snakes in a Desert Grassland
A significant shift in the relative abundance of snake species is found: Thamnophis marcianus and Crotalus atrox have increased in relative abundance and C. scutulatus has decreased, correlated with succession of local Semidesert Grasslands to Chihuahuan Desertscrub.
Defining evolutionary boundaries across parapatric ecomorphs of Black Salamanders (Aneides flavipunctatus) with conservation implications
It is concluded that Black Salamanders in north‐western California belong to at least three or four populations or species, and these all meet criteria for being Evolutionary Significant Units or ‘ESUs’ and therefore warrant conservation consideration.
Desert Tortoises (Gopherus agassizii) Are Selective Herbivores that Track the Flowering Phenology of Their Preferred Food Plants
It is suggested that herbaceous perennials, which were rare on the study area but represented ~30% of tortoise diet, may be important in sustaining tortoise populations during droughts when native annuals are absent.
Barcoding the Neotropical freshwater fish fauna using a new pair of universal COI primers with a discussion of primer dimers and M13 primer tails.
A new pair of COI primers are presented, which have yielded high quality barcodes across six teleost orders-Characiformes, Cichliformes and Cyprinodontiformes-native to South America, and tailed their primers with M13 forward and reverse primers to facilitate the DNA sequencing process.
TERRITORIAL BEHAVIOR IN THE AUSTRALIAN SCINCID LIZARD CTENOTUS FALLENS
It is hypothesize that C. fallens may exploit an opponent's tail as an "Achilles' heel" during aggressive interactions, confounding interpretation of tail break frequencies as being primarily due to predation attempts.
On the independent gene trees assumption in phylogenomic studies
- W. B. Jennings
- BiologyMolecular Ecology
- 14 September 2017
It is shown that the IA approach is more conservative, is simpler to use and requires fewer assumptions than the IG approaches, which allows researchers to obtain more precise and accurate estimates of species trees and historical demographic parameters.