Tuesday August 9, 2011
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Conservation Genetics of
the Eurasian Otter in Sweden
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 non-invasive 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 is 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 toe have large effects on the probability of extinction of this population.
For full text, see link: http://www.diva-portal.org/diva/getDocument?urn_nbn_se_uu_diva-7633__fulltext.pdf
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