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You searched for: Journal name Conservation genetics Remove constraint Journal name: Conservation genetics Subject gene flow Remove constraint Subject: gene flow Subject term genetic variation Remove constraint Subject term: genetic variation
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1. Fragmentation by weirs in a riverine system: A study of genetic variation in time and space among populations of European grayling (Thymallus thymallus) in a Danish river system

Author:
Torben Meldgaard; Einar E. Nielsen; Volker Loeschcke
Source:
Conservation genetics 2003 v.4 no.6 pp. 735-747
ISSN:
1566-0621
Subject:
DNA; Thymallus; fish; gene flow; genetic variation; habitat destruction; humans; microsatellite repeats; population; population size; rivers; sampling; temporal variation; testing; weirs; Denmark
Abstract:
... Human induced habitat alterations affect the genetic structure of many fish populations. Weirs in particular have caused fragmented populations previously connected by gene-flow. We studied the effects of weirs on the distribution of genetic variation within European grayling (Thymallus thymallus) populations from the Skjern River, Denmark. We compared microsatellite data from DNA extracted from h ...
DOI:
10.1023/B:COGE.0000006115.14106.de

2. Genetic variability in migratory and endemic island songbirds (genus Vireo): A comparative assessment using molecular and morphological traits

Author:
Patrick W. Zwartjes
Source:
Conservation genetics 2003 v.4 no.6 pp. 749-758
ISSN:
1566-0621
Subject:
Passeriformes; extinction; gene flow; genetic markers; genetic variation; indigenous species; migratory behavior; population; prediction; risk; songbirds; Jamaica; Puerto Rico
Abstract:
... Low genetic variation is thought to increase the risk of extinction in island species; however, these species can differ both in terms of endemism and gene flow. In a previous study, the endemic species of Puerto Rico (V. latimeri) and Jamaica (V. modestus and V. osburni) were shown to have less genetic variability than a continental relative, V. griseus. In this study, a migratory island species, ...
DOI:
10.1023/B:COGE.0000006116.44051.65

3. Genetic variation and island biogreography: Microsatellite and mitochondrial DNA variation in island populations of the Australian bush rat, Rattus fuscipes greyii

Author:
G. Hinten; F. Harriss; M. Rossetto; P.R. Braverstock
Source:
Conservation genetics 2003 v.4 no.6 pp. 759-778
ISSN:
1566-0621
Subject:
Rattus; denaturing gradient gel electrophoresis; gene flow; gene frequency; genetic distance; genetic drift; genetic variation; geographical distribution; haplotypes; heterozygosity; islands; loci; microsatellite repeats; mitochondrial DNA; mutation; population; population dynamics; rats; testing
Abstract:
... To understand the impact of various factors on the maintenance of genetic variation in natural populations, we need to focus on situations where at least some of these factors are removed or controlled. In this study, we used highly variable, presumably neutral, microsatellite and mtDNA markers to assess the nature of genetic variation in 14 island and two mainland populations of the Australian bu ...
DOI:
10.1023/B:COGE.0000006113.58749.ac

4. Microsatellite variation in Bavarian populations of European grayling (Thymallus thymallus): Implications for conservation

Author:
Bernhard Gum; Riho Gross; Oswald Rottmann; Wolf Schröder; Ralph Kühn
Source:
Conservation genetics 2003 v.4 no.6 pp. 659-672
ISSN:
1566-0621
Subject:
Thymallus; alleles; ancestry; breeding stock; drainage; drainage systems; gene flow; genetic distance; genetic variation; genotype; guidelines; immigration; microsatellite repeats; population; Germany
Abstract:
... European grayling populations in Bavaria have shown steady declines during the last 10–20years. In order to provide guidelines for conservation strategies and future management programs, we investigated the genetic structure of 15 grayling populations originating from three major Central European drainages (the Danube, the Elbe and the Rhine/Main) using 20 microsatellite loci. Genetic divergence b ...
DOI:
10.1023/B:COGE.0000006106.64243.e6

5. Asymmetric gene flow and the evolutionary maintenance of genetic diversity in small, peripheral Atlantic salmon populations

Author:
Consuegra, Sofía; Verspoor, Eric; Knox, David; García de Leániz, Carlos
Source:
Conservation genetics 2005 v.6 no.5 pp. 823-842
ISSN:
1566-0621
Subject:
Salmo salar; adults; gene flow; genetic variation; heterozygosity; inbreeding; microsatellite repeats; population dynamics; population size; Iberian Peninsula; Scotland
Abstract:
... Small populations may be expected to harbour less genetic variation than large populations, but the relation between census size (N), effective population size (N e), and genetic diversity is not well understood. We compared microsatellite variation in four small peripheral Atlantic salmon populations from the Iberian peninsula and three larger populations from Scotland to test whether genetic div ...
DOI:
10.1007/s10592-005-9042-4

6. Does time since colonization influence isolation by distance? A meta-analysis

Author:
Crispo, E.; Hendry, A. P.
Source:
Conservation genetics 2005 v.6 no.5 pp. 665-682
ISSN:
1566-0621
Subject:
gene flow; genetic distance; genetic drift; genetic markers; genetic variation; meta-analysis; prediction; refuge habitats; wildlife management
Abstract:
... Isolation by distance (IBD) is a phenomenon characterized by increasing genetic divergence and decreasing gene flow with increasing geographic distance. IBD is often used in conservation biology to infer the extent of gene flow among populations. An assumption inherent to this approach is equilibrium between genetic drift and gene flow, which may take thousands of years to achieve. This implies th ...
DOI:
10.1007/s10592-005-9026-4

7. Gene flow among San Joaquin kit fox populations in a severely changed ecosystem

Author:
Schwartz, Michael K.; Ralls, Katherine; Williams, Dan F.; Cypher, Brian L.; Pilgrim, Kristine L.; Fleischer, Robert C.
Source:
Conservation genetics 2005 v.6 no.1 pp. 25-37
Subject:
habitat destruction; geographical distribution; microsatellite repeats; endangered species; alleles; Vulpes; heterozygosity; foxes; gene flow; ecosystems; genetic variation; genetic markers; California
Abstract:
... The San Joaquin kit fox (Vulpes macrotis mutica) was once ubiquitous throughout Californias San Joaquin Valley and its surrounds. However, most of its habitat has been lost to irrigated agriculture, urban development, and oil fields. The remaining foxes are concentrated in six areas, although there are several small pockets of foxes throughout the Valley. To help conserve kit foxes, we sought an e ...
Handle:
10113/37855
DOI:
10.1007/s10592-004-7719-8

8. Genetic differentiation and intraspecific structure of Eastern Tropical Pacific spotted dolphins, Stenella attenuata, revealed by DNA analyses

Author:
Escorza-Treviño, Sergio; Archer, Frederick I.; Rosales, Maria; Lang, Aimee; Dizon, Andrew E.
Source:
Conservation genetics 2005 v.6 no.4 pp. 587-600
ISSN:
1566-0621
Subject:
coasts; dolphins; gene flow; gene frequency; genetic distance; genetic variation; genotyping; haplotypes; microsatellite repeats; mitochondrial DNA; phylogeny; population
Abstract:
... Mitochondrial DNA (mtDNA) control region sequences and microsatellite loci length polymorphisms were used to investigate genetic differentiation in spotted dolphins (Stenella attenuata) in the Eastern Tropical Pacific and to examine the intraspecific structure of the coastal subspecies (Stenella attenuata graffmani). One-hundred and thirty-five animals from several coastal areas and 90 offshore an ...
DOI:
10.1007/s10592-005-9013-9

9. Genetic diversity and differentiation of the endangered Japanese endemictree Magnolia stellata using nuclear and chloroplast microsatellite markers

Author:
Ueno, Saneyoshi; Setsuko, Suzuki; Kawahara, Takayuki; Yoshimaru, Hiroshi
Source:
Conservation genetics 2005 v.6 no.4 pp. 563-574
ISSN:
1566-0621
Subject:
Magnolia stellata; chloroplasts; gene flow; genes; genetic distance; genetic markers; genetic variation; haplotypes; loci; microsatellite repeats; planning; Japan
Abstract:
... Genetic diversity and differentiation were analyzed in 11 populations of Magnolia stellata (Sieb. and Zucc.) Maxim. (Magnoliaceae) in the Tokai district, Japan. Variation at four nuclear microsatellite (nSSR) loci was examined, three chloroplast microsatellite (cpSSR) markers were developed and 13 haplotypes identified. The 11 populations were divided into three groups (A, B and C). Each populatio ...
DOI:
10.1007/s10592-005-9011-y

10. Genetic diversity and population divergence in fragmented habitats: Conservation of Idaho ground squirrels

Author:
Garner, Alisse; Rachlow, Janet L.; Waits, Lisette P.
Source:
Conservation genetics 2005 v.6 no.5 pp. 759-774
ISSN:
1566-0621
Subject:
Spermophilus; endangered species; gene flow; genetic variation; habitat conservation; habitat destruction; habitat fragmentation; inbreeding; microsatellite repeats; mitochondrial DNA; Idaho
Abstract:
... The Idaho ground squirrel, which consists of a northern (Spermophilus brunneus brunneus) and a southern subspecies (S. b. endemicus), has suffered from habitat loss and fragmentation, resulting in a reduction in both numbers and geographic range of the species. The northern Idaho ground squirrel (NIDGS) is listed as a threatened subspecies under the Endangered Species Act, and the southern Idaho g ...
DOI:
10.1007/s10592-005-9035-3

11. Genetic structure and gene flow in an endangered perennial grass, Arctophila fulva var. pendulina

Author:
Kreivi, Marjut; Rautiainen, Pirjo; Aspi, Jouni; Hyvärinen, Marko
Source:
Conservation genetics 2005 v.6 no.5 pp. 683-696
ISSN:
1566-0621
Subject:
Arctophila; amplified fragment length polymorphism; drainage; field experimentation; gene flow; genetic variation; grasses; habitats; heterozygosity; meadows; models; outcrossing; population structure; seedlings; seeds; Baltic Sea; Finland; Sweden
Abstract:
... Arctophila fulva var. pendulina is a rare endemic perennial grass confined to seashore and riverbank meadows around the Bothnian Bay, the northernmost part of the Baltic Sea. The number of A. fulva populations has decreased during the last few decades in Finland and Sweden, and nowadays there are only eight populations left in the drainage area of the Bothnian Bay. We investigated the distribution ...
DOI:
10.1007/s10592-005-9027-3

12. Increased genetic differentiation in a specialist versus a generalist bee: implications for conservation

Author:
Zayed, Amro; Packer, Laurence; Grixti, Jennifer C.; Ruz, Luisa; Owen, Robin E.; Toro, Haroldo
Source:
Conservation genetics 2005 v.6 no.6 pp. 1017-1026
ISSN:
1566-0621
Subject:
extinction; founder effect; gene flow; genetic variation; hosts; insects; pollen; population size; population structure
Abstract:
... Oligolectic bees are specialists that collect pollen from one or a few closely related species of plants, while polylectic bees are generalists that collect pollen from both related and unrelated species of plants. Because of their more restricted range of floral hosts, it is expected that specialists persist in more isolated populations than do generalists. We present data on the population struc ...
DOI:
10.1007/s10592-005-9094-5

13. Population structure and genetic variation in the endangered Giant Kangaroo Rat (Dipodomys ingens)

Author:
Loew, S. S.; Williams, D. F.; Ralls, K.; Pilgrim, K.; Fleischer, R. C.
Source:
Conservation genetics 2005 v.6 no.4 pp. 495-510
ISSN:
1566-0621
Subject:
Dipodomys; endangered species; extinction; gene flow; genes; genetic distance; genetic drift; genetic variation; habitats; loci; microsatellite repeats; mitochondrial DNA; population size; population structure; risk; rodents; topography
Abstract:
... Populations of the endangered giant kangaroo rat, Dipodomys ingens (Heteromyidae), have suffered increasing fragmentation and isolation over the recent past, and the distribution of this unique rodent has become restricted to 3% of its historical range. Such changes in population structure can significantly affect effective population size and dispersal, and ultimately increase the risk of extinct ...
DOI:
10.1007/s10592-005-9005-9

14. Spatial and temporal genetic differentiation and effective population size of brown trout (Salmo trutta, L.) in small Danish rivers

Author:
Jensen, Lasse F.; Hansen, Michael M.; Carlsson, Jens; Loeschcke, Volker; Mensberg, Karen-Lise D.
Source:
Conservation genetics 2005 v.6 no.4 pp. 615-621
ISSN:
1566-0621
Subject:
Salmo trutta; gene flow; genetic variation; immigration; lakes; microsatellite repeats; models; pollution; population size; rivers; trout; variance; Denmark
Abstract:
... The spatial and temporal genetic structure of brown trout populations from three small tributaries of Lake Hald, Denmark, was studied using analysis of variation at eight microsatellite loci. From two of the populations temporal samples were available, separated by up to 13 years (3.7 generations). Significant genetic differentiation was observed among all samples, however, hierarchical analysis o ...
DOI:
10.1007/s10592-005-9014-8

15. The effects of gene flow and population isolation on the genetic structure of reintroduced wild turkey populations: Are genetic signatures of source populations retained?

Author:
Latch, Emily K.; Rhodes, Olin E. Jr.
Source:
Conservation genetics 2005 v.6 no.6 pp. 981-997
ISSN:
1566-0621
Subject:
alleles; gene flow; genetic variation; introduced species; microsatellite repeats; models; monitoring; turkeys; wildlife management; Indiana
Abstract:
... To counter losses of genetic diversity in reintroduced populations, species sometimes are reintroduced into networks of populations with the potential to exchange individuals. In reintroduced populations connected by gene flow, patterns of genetic structure initiated by the founding event may become obscured, and populations may eventually follow an isolation-by-distance model of genetic different ...
DOI:
10.1007/s10592-005-9089-2

16. Does genetic variation and gene flow vary with rarity in obligate seeding Persoonia species (Proteaceae)?

Author:
Paul D. Rymer; David J. Ayre
Source:
Conservation genetics 2006 v.7 no.6 pp. 919-930
ISSN:
1566-0621
Subject:
Persoonia; amplified fragment length polymorphism; buried seeds; extinction; gene flow; gene pool; genetic drift; genetic variation; loci; mature plants; outcrossing; perennials; population; rare species; risk; sowing
Abstract:
... Theory predicts that genetic variation is a determinant of persistence, and that the abundance and distribution of variation is strongly dependent on genetic drift and gene flow. Small, isolated populations are expected to be less diverse and more differentiated than large, inter-connected populations. Thus rare species may be more at risk of extinction. We used 389 putative AFLP loci to compare g ...
DOI:
10.1007/s10592-006-9135-8

17. Microsatellite variation and population structure of a recovering Tree frog (Hyla arborea L.) metapopulation

Author:
Paul Arens; Rob Bugter; Wendy van’t Westende; Ronald Zollinger; Jan Stronks; Claire C. Vos; Marinus J. M. Smulders
Source:
Conservation genetics 2006 v.7 no.6 pp. 825-835
ISSN:
1566-0621
Subject:
Hyla; gene flow; genetic variation; habitat destruction; microsatellite repeats; ponds; population; population size; population structure; testing; Netherlands
Abstract:
... Numbers and sizes of populations of the European tree frog in The Netherlands have dramatically decreased in the second half of the last century due to extensive habitat destruction and fragmentation. We have studied the genetic structure of a slowly recovering meta-population. Strong genetic differentiation, estimated at eight microsatellite loci, was found between clusters of populations (F ₛₜ-v ...
DOI:
10.1007/s10592-005-9112-7

18. Significant patterns of population genetic structure and limited gene flow in a threatened macropodid marsupial despite continuous habitat in southeast Queensland, Australia

Author:
Stephanie L. Hazlitt; Anne W. Goldizen; Mark D. B. Eldridge
Source:
Conservation genetics 2006 v.7 no.5 pp. 675-689
ISSN:
1566-0621
Subject:
dispersal behavior; endangered species; landscapes; Petrogale; gene flow; environmental factors; genetic variation; population; population structure; habitats; population dynamics; genetic markers; forests; Queensland
Abstract:
... Many endangered species worldwide are found in remnant populations, often within fragmented landscapes. However, when possible, an understanding of the natural extent of population structure and dispersal behaviour of threatened species would assist in their conservation and management. The brush-tailed rock-wallaby (Petrogale penicillata), a once abundant and widespread rock-wallaby species acros ...
DOI:
10.1007/s10592-005-9101-x

19. Variation in DNA microsatellites of the ferruginous pygmy-owl (Glaucidium brasilianum)

Author:
Glenn A. Proudfoot; Rodney L. Honeycutt; R. Douglas Slack; Michael F. Ingraldi
Source:
Conservation genetics 2006 v.7 no.6 pp. 945-956
ISSN:
1566-0621
Subject:
Strigiformes; gene flow; genetic variation; heterozygosity; microsatellite repeats; mitochondrial DNA; population; Arizona; Mexico; Texas
Abstract:
... Eleven polymorphic microsatellite loci were used to assess genetic variation in the ferruginous pygmy owl (Glaucidium brasilianum) from North America. Analysis of genotypic variation suggests restricted gene flow between pygmy-owl populations in Arizona-Sonora and Sinaloa, and Texas and the remaining states in Mexico. The Arizona-Sonora population showed signs of a recent genetic bottleneck, an ob ...
DOI:
10.1007/s10592-006-9138-5

20. Conservation of Hymenocallis coronaria genetic diversity in the presence of disturbance and a disjunct distribution

Author:
Markwith, Scott H.; Parker, Kathleen C.
Source:
Conservation genetics 2007 v.8 no.4 pp. 949-963
ISSN:
1566-0621
Subject:
Hymenocallis; aquatic plants; biogeography; chloroplast DNA; gene flow; genetic variation; genome; habitats; haplotypes; hydroelectric power; microsatellite repeats; population distribution; population size; power generation; regression analysis; watersheds; United States
Abstract:
... Evidence shows that dam construction has affected faunal species distribution and diversity in the southeastern U.S. However, the effects of this perturbation on aquatic flora of the region are heretofore uninvestigated. The objective for this research is to examine the effects of hydroelectric power generation and habitat characteristics on the size and distribution of populations of Hymenocallis ...
DOI:
10.1007/s10592-006-9249-z