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Preservation of blood and tissue samples for stable-carbon and stable-nitrogen isotope analysis
Researchers engaged in collecting animal material for stable-carbon and stable-nitrogen isotope analysis are frequently faced with the need to preserve tissues prior to transportation to the…
Similarity of contemporary and historical gene flow among highly fragmented populations of an endangered rattlesnake
The results suggest that recent habitat fragmentation has had little effect on the genetic characteristics of these snakes, but rather that this species has historically existed in small isolated populations that may be resistant to the long‐term negative effects of inbreeding.
Genetic evidence for female host-specific races of the common cuckoo
- H. Gibbs, M. Sorenson, K. Marchetti, M. Brooke, N. Davies, Hiroshi K. Nakamura
- 14 September 2000
Genetic evidence that gentes are restricted to female lineages is provided, with cross mating by males maintaining the common cuckoo genetically as one species, and there is differentiation between gentes in maternally inherited mitochondrial DNA, but not in microsatellite loci of nuclear DNA is shown.
Limited differentiation in microsatellite DNA variation among northern populations of the yellow warbler: evidence for male‐biased gene flow?
The presence of low population imbalance index values and significant isolation‐by‐distance relationships for both FST and RST suggests that these populations are at evolutionary equilibrium and that the high degree of similarity between populations may be due to high levels of male‐biased gene flow.
Inferring species-level phylogenies and taxonomic distinctiveness using multilocus data in Sistrurus rattlesnakes.
These methods provide evidence that a currently described species, the massasauga rattlesnake (Sistrurus catenatus), consists of two well-supported clades, and suggest that an active period of speciation within SistRurus occurred within the late Pliocene/Pleistocene eras.
Realized Reproductive Success of Polygynous Red-Winged Blackbirds Revealed by DNA Markers
Genetically based measures of reproductive success show that individual males realize more than 20% of their overall success from extra-pair fertilizations, on average, and that this form of mating behavior confounds traditional measures of male success.
Genetic structure of populations of the threatened eastern massasauga rattlesnake, Sistrurus c. catenatus: evidence from microsatellite DNA markers
- H. Gibbs, K. Prior, P. Weatherhead, G. Johnson
- Environmental Science, BiologyMolecular ecology
- 1 December 1997
Six microsatellite DNA loci are used to generate information on the degree of genetic differentiation between, and the levels of inbreeding within, populations of the threatened eastern massasauga rattlesnake to understand how evolutionary processes operate in these populations and aid the development of conservation plans for this species.
Phylogeography and genetic structure of northern populations of the yellow warbler (Dendroica petechia)
Yellow warblers collected from seven locations across Canada and from Alaska suggest that individual populations of migrant birds may form demographically isolated management units on a smaller scale than previously appreciated.
Ancestral polymorphisms in genetic markers obscure detection of evolutionarily distinct populations in the endangered Florida grasshopper sparrow (Ammodramus savannarum floridanus)
- N. Bulgin, H. Gibbs, P. Vickery, A. Baker
- Biology, Environmental ScienceMolecular ecology
- 1 April 2003
It is argued that despite the lack of phylogenetic distinctiveness of floridanus genotypes the observed genetic differentiation and previously documented phenotypic differences justify continued designation of this subspecies as a protected population segment.
Determining the reproductive behaviour of individual brown-headed cowbirds using microsatellite DNA markers
Parents analyses of young and adults from a marked population at Delta, Manitoba for 1 year revealed key features of the reproductive behaviour of the brown-headed cowbird, including monogamy is the predominant genetic mating system, and realized annual fecundity of females may be lower than previously suggested.