Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Supportive release from a zoo population by cross-fostering can significantly increase genetic variation in the highly inbred wild Swedish wolf population
Stockholm University, Faculty of Science, Department of Zoology, Population Genetics. (Populationsgenetik)
Linköpings Universitet. (Kolmården)
Stockholm University, Faculty of Science, Department of Zoology, Population Genetics. (Populationsgenetik)ORCID iD: 0000-0001-9286-3361
(English)Manuscript (preprint) (Other academic)
Abstract [en]

The wild wolf population (Canis lupus) in Sweden is classified as Endangered and descends from only five individuals. The population is isolated and highly inbred; individuals are on average more related to each other than siblings. Inbreeding depression expressed as reduced litter size and a high frequency of spinal disorders have been reported. Management goals include reducing levels of inbreeding, and one suggestion to achieve this is through crossfostering release of pups from a zoo conservation breeding program into wild dens. We used pedigree data of the wild and zoo populations, respectively, to evaluate to what extent the zoo population can support the wild one with respect to increased genetic variation and reduction of inbreeding. The results show a potential to almost double genetic variation measured as founder alleles from 11.2 to 21.1, despite the fact that the two populations have three common founders. Potentially, the number of founder genome equivalents can be increased from present 1.8 to around 3.2. However, to achieve maximum genetic support, almost 50 percent of the wild population gene pool must consist of genes from the zoo population. Average kinship in the joint population of zoo and wild wolves is 0.15, thus release of zoo wolves cannot in itself be expected to reduce average inbreeding below the management target of 0.1. We conclude that releases from the zoo can support but not resolve the genetically precarious situation of the wild Swedish wolf population.

Keyword [en]
captive breeding, pedigree analysis, Swedish wolves, conservation policy, genetic rescue
National Category
Genetics
Research subject
Population Genetics
Identifiers
URN: urn:nbn:se:su:diva-100602OAI: oai:DiVA.org:su-100602DiVA: diva2:694838
Available from: 2014-02-07 Created: 2014-02-07 Last updated: 2014-10-13Bibliographically approved
In thesis
1. Assessing inbreeding and loss of genetic variation in canids, domestic dog (Canis familiaris) and wolf (Canis lupus), using pedigree data
Open this publication in new window or tab >>Assessing inbreeding and loss of genetic variation in canids, domestic dog (Canis familiaris) and wolf (Canis lupus), using pedigree data
2014 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Genetic variation is necessary to maintain the ability of wild and domestic populations to genetically adapt to changed selective pressures. When relationships among individuals are known, conservation genetic management can be based on statistical pedigree analysis. Such approaches have traditionally focused on wild animal conservation breeding in captivity. In this thesis, I apply pedigree-based techniques to domestic and wild animal populations, focusing on two canids – the domestic dog and the wild wolf.

Main objectives include to 1) develop a means for making any pedigree fit the input requirements of the software Population Management x (PMx) and to use this program to 2) investigate rate of inbreeding and loss of genetic variation in dog breeds, including possible correlations between recent inbreeding and health problems, 3) estimate effects on inbreeding of the 2010 hunt of the endangered Swedish wolf population, and to 4) evaluate the potential to genetically support this wolf population through cross-fostering releases of zoo bred pups from a conservation breeding program.

Results include successfully developing the converter program mPed (Paper I) and applying both mPed and PMx to dog and wolf pedigrees. I found extensive loss of genetic variation and moderate rates of recent inbreeding in 26 dog breeds, but no major difference in these parameters between breeds classified as “healthy” vs. “unhealthy“ (Paper II). I found average inbreeding coefficients to more than double (from F=0.03 to 0.07) and founder genetic variation to decrease by c. 30 percent over the past few decades in traditional Swedish dog breeds identified as being of conservation concern (Paper IV). Hunting will make it less likely to reach genetically based Favourable Conservation Status criteria for the Swedish wild wolf population (Paper III), but release of zoo bred wolves through cross-fostering may potentially almost double founder genetic variation of this population (Paper V).

Place, publisher, year, edition, pages
Stockholm: Department of Zoology, Stockholm University, 2014. 72 p.
National Category
Zoology
Research subject
Population Genetics
Identifiers
urn:nbn:se:su:diva-100371 (URN)978-91-7447-858-7 (ISBN)
Public defence
2014-03-07, Nordenskiöldsalen, Geovetenskapens hus, Svante Arrhenius väg 12, Stockholm, 13:00 (English)
Opponent
Supervisors
Note

At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 2: Epub ahead of print. Paper 4: Manuscript. Paper 5: Manuscript.

Available from: 2014-02-13 Created: 2014-02-03 Last updated: 2014-10-13Bibliographically approved

Open Access in DiVA

No full text

Search in DiVA

By author/editor
Jansson, MijaLaikre, Linda
By organisation
Population Genetics
Genetics

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 278 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf