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3 Uppsatser om Lagopus lagopus - Sida 1 av 1

Förvaltningsverktyg för ripjakt i Jämtlands län

Jakten på ripa är mycket populär bland svenska jägare och även bland jägare från andra länder. På grund av denna popularitet är rippopulationen på statens mark ovan odlingsgränsen och renbetesfjällen i Jämtlands län utsatta för ett högt jakttryck. Detta har lett till att jakten behöver regleras. Länsstyrelsen, som har uppdraget att upplåta småviltsjakten på statens mark, har i vissa samebyar infört kvotering genom lottning. Det innebär att max fem jägare per område och dag tillåts, vilka dessa jägare är avgörs genom lottning.

Användande av avskjutningsstatistik i förvaltning : påverkar tidigare jakt CPUE?

In fisheries, there is a long tradition to use catch data when evaluating changes in the stock and effects from harvesting. It is a common practice to use Catch Per Unit Effort (CPUE) as an index of population size, and several studies have investigated the properties of CPUE in relation to population abundance, spatial distribution and efficiency of gear. In research, catch rate on trap-transects is used as an index of abundance for wildlife species but CPUE is rarely applied as a tool in harvest management.In 1993, more than 60 000 km2 of the state managed mountain range in Sweden was opened to the public for small game hunting, under the responsibility of the county administrative boards in Jämtland, Västerbotten and Norrbotten. The total area is now divided into 332 hunting units (median=73 km2) and an internet based system is used to administer licences and reporting bag statistic. Each hunter has to register the results within two weeks after the hunt.

Undersökning av förekomst av okända virus hos svenska fjällrävar med encefalit :

The artic fox is under threat of extermination in Europe. The population decreased strongly at the beginning of the twentieth century because of intensive hunting. The artic fox was placed under protection by law 1928 in Sweden but despite this the population has had difficultly to recover. This can depend on several reasons, but the main threats are shortage of food and competition from the red fox. Along with Norway and Finland, Sweden has carried out a project called SEFALO (Saving the Endangered Fennoscandian Alopex lagopus), whose objectives were to prevent continued decreased populationnumbers and through, for example supplementary feeding, help the population to recover.