The variability of DNA fingerprints in three species of swan

Meng, Anming; Carter, Royston E.; Parkin, David T.

doi:10.1038/hdy.1990.9

Cited by 38 publications

(15 citation statements)

References 15 publications

(9 reference statements)

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“…This observation of low variability is consistent with the observations of Barrett and Vyse (1982), Meng et al (1990) and Marsolais and White (1997) who noted low genetic diversity in trumpeter swans across their entire range. This remarkably low diversity coupled with the fact that most mitochondrial haplotypes differed by only one nucleotide change (Fig.…”

Section: Discussionsupporting

confidence: 92%

A rangewide population genetic study of trumpeter swans

et al. 2007

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For management purposes, the range of naturally occurring trumpeter swans (Cygnus buccinator) has been divided into two populations, the Pacific Coast Population (PP) and the Rocky Mountain Population (RMP). Little is known about the distribution of genetic variation across the species' range despite increasing pressure to make difficult management decisions regarding the two populations and flocks within them. To address this issue, we used rapidly evolving genetic markers (mitochondrial DNA sequence and 17 nuclear microsatellite loci) to elucidate the underlying genetic structure of the species. Data from both markers revealed a significant difference between the PP and RMP with the Yukon Territory as a likely area of overlap. Additionally, we found that the two populations have somewhat similar levels of genetic diversity (PP is slightly higher) suggesting that the PP underwent a population bottleneck similar to a well-documented one in the RMP. Both genetic structure and diversity results reveal that the Tri-State flock, a suspected unique, non-migratory flock, is not genetically different from the Canadian flock of the RMP and need not be treated as a unique population from a genetic standpoint. Finally, trumpeter swans appear to have much lower mitochondrial DNA variability than other waterfowl studied thus far which may suggest a previous, species-wide bottleneck.

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Section: Discussionsupporting

confidence: 92%

A rangewide population genetic study of trumpeter swans

et al. 2007

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“…This low genetic diversity is consistent with a study by Marsolais and White (1997) using minisatellite probes that found that trumpeter swans had higher band sharing coefficients, i.e. less variability, than three other species of swans (Meng et al 1990). These low levels of genetic variation in source populations, coupled with a known population bottleneck, make questions of genetic viability of reintroduced flocks particularly interesting.…”

Section: Introductionsupporting

confidence: 86%

Genetic consequences of trumpeter swan (Cygnus buccinator) reintroductions

2010

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Relocation programs are often initiated to restore threatened species to previously occupied portions of their range. A primary challenge of restoration efforts is to translocate individuals in a way that prevents loss of genetic diversity and decreases differentiation relative to source populations-a challenge that becomes increasingly difficult when remnant populations of the species are already genetically depauperate. Trumpeter swans were previously extirpated in the entire eastern half of their range. Physical translocations of birds over the last 70 years have restored the species to portions of its historical range. Despite the long history of management, there has been little monitoring of the genetic outcomes of these restoration attempts. We assessed the consequences of this reintroduction program by comparing patterns of genetic variation at 17 microsatellite loci across four restoration flocks (three wild-released, one captive) and their source populations. We found that a wildreleased population established from a single source displayed a trend toward reduced genetic diversity relative to and significant genetic differentiation from its source population, though small founder population effects may also explain this pattern. Wild-released flocks restored from multiple populations maintained source levels of genetic variation and lacked significant differentiation from at least one of their sources. Further, the flock originating from a single source revealed significantly lower levels of genetic variation than those established from multiple sources. The distribution of genetic variation in the captive flock was similar to its source. While the case of trumpeter swans provides evidence that restorations from multiple versus single source populations may better preserve natural levels of genetic diversity, more studies are needed to understand the general applicability of this management strategy.

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“…1987, Meng et al 1990, Westneat 1990, Jones et al 1991, Oring et al 1992. Furthermore, these outbred species have lower alíele frequencies (< 0.154) and higher mean number of alíeles per locus (> 6.5;Mengetal.…”

Section: Discussionmentioning

confidence: 99%

Genetic Analyses of Wild Populations of Hawaiian Geese Using DNA Fingerprinting

Rave

1995

The Condor

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Abstract. DNA fingerprinting was used to compare levels of genetic variation among 75 wild Hawaiian Geese, or Nene {Branta sandvicensis), from six populations on the islands of Hawaii, Maui, and Kauai and between the six wild populations and a captive colony of 29 Nene. Mantel tests were used to determine differences in similarity coefficient distributions (amount of genetic similarity among individuals within each population) among wild Nene and between wild and captive Nene. Nene from Hawaii Volcanoes National Park on the island of Hawaii had the lowest similarity coefficient distribution, whereas Nene on Kauai had the highest. Captive birds had an intermediate similarity coefficient distribution when compared to wild populations. No unique DNA fingerprint fragments were found in wild birds when compared to captive birds. Successful recruitment of migrants might have decreased similarity at Hawaii Volcanoes National Park, whereas inbreeding and captiverelease techniques might have increased similarity on Kauai. Varying levels of inbreeding or fixation by drift might explain differences in similarity coefficient distributions between wild and captive populations.

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The variability of DNA fingerprints in three species of swan

Cited by 38 publications

References 15 publications

A rangewide population genetic study of trumpeter swans

A rangewide population genetic study of trumpeter swans

Genetic consequences of trumpeter swan (Cygnus buccinator) reintroductions

Genetic Analyses of Wild Populations of Hawaiian Geese Using DNA Fingerprinting

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