Significance of caribou (Rangifer tarandus) ecotypes from a molecular genetics viewpoint

@article{Courtois2004SignificanceOC,
  title={Significance of caribou (Rangifer tarandus) ecotypes from a molecular genetics viewpoint},
  author={R. Courtois and L. Bernatchez and J. Ouellet and Laůrier Breton},
  journal={Conservation Genetics},
  year={2004},
  volume={4},
  pages={393-404}
}
Three caribou ecotypes are present in easternNorth America: the mountain caribou which isfound south of the St. Lawrence River, thebarren-ground caribou which calves in thetundra, and in between, the forest-dwellingecotype which lives all year long in the borealforest. Blood and muscle samples were collectedfrom seven populations and characterized ateight microsatellite loci to test thehypotheses that forest-dwelling andbarren-ground ecotypes constitute a singlemetapopulation and that… Expand

Figures and Tables from this paper

Population genetics of woodland caribou (Rangifer tarandus caribou) on the island of Newfoundland
The purpose of this study was to characterize the genetic variation and genetic structure of caribou herds on the island of Newfoundland. A 2223 bp sequence of mitochondrial DNA from the ControlExpand
Genetic diversity and relatedness of boreal caribou populations in western Canada
Abstract We studied genetic diversity within and gene flow among six ‘threatened’ populations of boreal caribou ( Rangifer tarandus caribou ) inhabiting Alberta and British Columbia, Canada. MeanExpand
Reindeer introgression and the population genetics of caribou in southwestern Alaska.
TLDR
The results suggest that despite previous movement data indicating metapopulation-like dispersal in this region, there may be unknown barriers to reproduction by dispersing individuals and support findings that wild and domestic Rangifer can hybridize. Expand
The eastern migratory caribou: the role of genetic introgression in ecotype evolution
TLDR
The historical reconstruction of the eastern migratory ecotype further supports its current classification as a conservation unit, specifically a Designatable Unit, under Canada’s Species at Risk Act and has implications for other sub-specific contact zones for caribou and other North American species in conservation unit delineation. Expand
Historical Changes and Current Distribution of Caribou, Rangifer tarandus , in Quebec
We examined published historical information, reports on aerial surveys conducted since 1953, and harvest data collected since 1971 to describe changes in the distribution and abundance of Caribou (Expand
Population size and major valleys explain microsatellite variation better than taxonomic units for caribou in western Canada
TLDR
This work used microsatellite markers to evaluate the suitability of existing intra‐specific taxonomic designations to act as population units for conservation and contrasted this with landscape features that were independent of taxonomy, suggesting that genetic structure did not correspond to existing taxonomic designation. Expand
Refugial origin and postglacial colonization of holarctic reindeer and caribou
The classification and colonization of reindeer and caribou (Rangifer tarandus) was assessed from analysis of both proteins, nuclear DNA and mitochondrial DNA. I demonstrate that the currentExpand
Which Caribou? Misnaming population units leads to conservation
  • 2020
In reviewing the genetic, morphological, behavioural, and ecological distinctiveness of caribou throughout Canada, the Committee on the Status of Endangered Wildlife in Canada (COSEWIC) (2011)Expand
High genetic connectivity and introgression from domestic reindeer characterize northern Alaska caribou herds
TLDR
The findings indicate long-term genetic exchange among North Slope caribou herds when their ranges overlap, and suggest that herd size may influence susceptibility to reindeer introgression. Expand
Genetic structure and effective size of an endangered population of woodland caribou
TLDR
The effective population size of this population of woodland caribou appears to have declined by 53% over the last 15 years and is now estimated at Ne = 16 individuals, and genetic substructure among subgroups has increased in recent years. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 72 REFERENCES
Genetic variation of Woodland caribou (Rangifer tarandus) in North America
TLDR
To maintain the residual genetic variation in this population and to slow the rate of accumulation of inbreeding, it is recommended the division of Anahim and Revelstoke populations into neighborhoods and a conservative strategy of transplants from these groups, without symmetrical exchange among populations in the western region. Expand
Microsatellite DNA evidence for genetic drift and philopatry in Svalbard reindeer
TLDR
Svalbard reindeer appeared to conform to the paradigm of island populations made genetically depauperate by genetic drift, which is the first study to report significant differentiation at microsatellite loci in Rangifer at such short geographical distances. Expand
Characterization of microsatellite loci in caribou Rangifer tarandus, and their use in other artiodactyls
TLDR
Genetic analysis of caribou populations using microsatellites will be useful in addressing a number of population issues in this species, including the amount of genetic variation within and between populations, gene flow and herd identity. Expand
Demographic characteristics of circumpolar caribou populations: ecotypes, ecological constraints, releases, and population dynamics
TLDR
It is found that each ecotype is exposed to different ecological constraints and releases, which influence the demographic characteristics of their populations, and that in North America, the woodland caribou subspecies (genotype) forms the largest barren-ground ecotype herd in the world. Expand
Dynamics of woodland caribou populations at the southern limit of their range in Saskatchewan
TLDR
Based on serum progesterone levels, first conception by females occurred at 16 months and the overall pregnancy rate was 94%, and in addition the minimum parturition rate was 86%, all of which indicate adequate nutrition, which is comparatively low, though similar to results from other studies on woodland caribou. Expand
Genetic variation in domestic reindeer and wild caribou in Alaska.
TLDR
There is considerable genetic variation in reindeer and caribou for all three loci, including five, three and six alleles for DQA, kappa-casein and D-loop respectively, which suggests that gene flow has been limited. Expand
Status of woodland caribou in western north America
TLDR
Managers in southern caribou ranges stress the need for a better understanding ofCaribou population stability within mixed prey/predator regimes; how habitat changes affect these regimes; and how to develop effective land use guidelines for resource extraction that can sustian caribous populations and maintain resource industries. Expand
Genetic variation in transferrin as a predictor for differentiation and evolution of caribou from eastern Canada
TLDR
The findings, together with genetic identity analyses, suggest that the caribou in Manitoba, Ontario, and Quebec/Labrador are mainly of the R.t. tarandus type, and that little interbreeding has occurred with other subspecies. Expand
The distribution and movement patterns of four woodland caribou herds in Quebec and Labrador
Recent studies of woodland caribou (Rangifer tarandus caribou) in northern Quebec and central Labrador have demonstrated similar patterns of seasonal movements and distribution among four herds.Expand
Population status, distribution, and movements of woodland caribou in west central Alberta
TLDR
Twenty-four woodland caribou in the mountains and foothills of west central Alberta were radio collared to obtain information on seasonal movements, location and extent of seasonal ranges, rutting and calving areas, and population status. Expand
...
1
2
3
4
5
...