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Genetic evaluation of an otter translocation program
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Biologiska sektionen, Institutionen för ekologi och evolution, Zooekologi.
Vise andre og tillknytning
2004 (engelsk)Inngår i: Conservation Genetics, ISSN 1566-0621 (Print) 1572-9737 (Online), Vol. 5, nr 1, s. 79-88Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
2004. Vol. 5, nr 1, s. 79-88
Identifikatorer
URN: urn:nbn:se:uu:diva-95530OAI: oai:DiVA.org:uu-95530DiVA, id: diva2:169785
Tilgjengelig fra: 2007-03-02 Laget: 2007-03-02 Sist oppdatert: 2009-03-31bibliografisk kontrollert
Inngår i avhandling
1. Conservation Genetics of the Eurasian Otter in Sweden
Åpne denne publikasjonen i ny fane eller vindu >>Conservation Genetics of the Eurasian Otter in Sweden
2007 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

In this thesis, molecular genetic methods were used to study a threatened species, the Eurasian otter. Estimates of population size and population dynamics parameters were obtained, the genetic effects of a restocking program was evaluated, and a population viability analysis was conducted to assess which demographic parameters are most important for the future viability of an otter population. Many of the studies were based on noninvasive genetic sampling of faeces.

In the genetic evaluation of the restocking program, it was found that the released otters had contributed to subsequent generations. However, the effects were to a large degree limited to the near surroundings of the release areas.

Comparison of two census methods, snow-tracking and noninvasive genetic census based on faeces, showed that approximately only half of the otters detected with the genetic census were found with the snow-tracking census. It is recommended to combine these two methods to obtain the most reliable estimates of population size.

A short-term study on population dynamics in otters showed that apparent survival was higher in females than in males and that the rate of addition was also high and likely influenced by migration.

The population viability analysis incorporated both genetics and demography and revealed that survival to first reproduction was the most crucial demographic parameter affecting the viability of the study population. This result suggests that conservation efforts should be focused on protocols that enhance the survival prospects of young females. Environmental stochasticity was also found to have large effects on the probability of extinction of this population.

sted, utgiver, år, opplag, sider
Uppsala: Acta Universitatis Upsaliensis, 2007. s. 60
Serie
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 278
Emneord
Ecology, in situ conservation, individual identification, microsatellites, mtDNA, noninvasive genetic sampling, population dynamics, population size, PVA, restocking, Ekologi, Lutra lutra
Identifikatorer
urn:nbn:se:uu:diva-7633 (URN)978-91-554-6816-3 (ISBN)
Disputas
2007-03-23, Zootissalen, F d zoologiska institutionen, Villavägen 9, Uppsala, 10:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2007-03-02 Laget: 2007-03-02 Sist oppdatert: 2009-03-31bibliografisk kontrollert

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