Problem ER13

The following table reports the numbers of a lynx (Lynx lynx) population in Sweden (see Fig. 4) as censused during a decade

Year	1956	1957	1958	1959	1960	1961	1962	1963	1964	1965	1966
Numbers	11	8	3	10	10	18	11	21	19	55	45

**Figure 4:** Swedish lynx in the snow.
$\includegraphics[width=0.5\linewidth]{Skogens_Konung_Lynx_2.eps}$

Estimate the instantaneous rate of demographic increase for the Swedish lynx population. Suppose that you want to repopulate an Alpine region in which Lynx lynx is no longer present because it was exterminated in the past centuries. You decide to release 10 lynxes (sex ratio 1:1) which have been captured in Sweden. Calculate the long-term extinction risk for the new population. To this end assume that the average lifetime of a lynx is about 10 years and that the rate of demographic increase is the same as the one you estimated for the Swedish population.