Björnen i Sverige En rapport från Skandinaviska ... - NINA
Björnen i Sverige En rapport från Skandinaviska ... - NINA
Björnen i Sverige En rapport från Skandinaviska ... - NINA
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INNEHÅLLSFÖRTECKNING<br />
HISTORIK ..................................................................................................................................................1<br />
Koloniseringen av Skandinavien .....................................................................................................1<br />
Populationsutveckling sedan 1800-talet ..........................................................................................1<br />
NUVARANDE STATUS ................................................................................................................................2<br />
Utbredning.......................................................................................................................................2<br />
Rovdjursobservationer och relativa tätheter ....................................................................................3<br />
Populationsuppskattning..................................................................................................................4<br />
FYSISKA ATTRIBUT....................................................................................................................................5<br />
FÖDA.........................................................................................................................................................6<br />
BETEENDE.................................................................................................................................................8<br />
Hemområden ...................................................................................................................................8<br />
Dygnsrytm .......................................................................................................................................9<br />
Habitatval ......................................................................................................................................11<br />
Vintersömn och idesvistelse ..........................................................................................................12<br />
Utvandring.....................................................................................................................................14<br />
Social organisering bland honor ....................................................................................................15<br />
<strong>Björnen</strong>s parningssystem...............................................................................................................16<br />
REPRODUKTION.......................................................................................................................................16<br />
Dräktighetsperioden ......................................................................................................................16<br />
Kullstorlek och intervall ................................................................................................................17<br />
Ålder vid första och sista reproduktion .........................................................................................18<br />
DÖDLIGHET.............................................................................................................................................19<br />
Dödsorsaker...................................................................................................................................19<br />
Sexuellt Selekterat Infanticid (SSI) (dråp av ungar)......................................................................21<br />
POPULATIONENS LIVSKRAFTIGHET..........................................................................................................22<br />
Demografisk livskraftighet ............................................................................................................23<br />
Genetisk livskraftighet...................................................................................................................23<br />
FÖRHÅLLANDET MELLAN BJÖRN OCH MÄNNISKA....................................................................................24<br />
Effekt av jakt (legal och illegal) på den svenska björnstammen....................................................25<br />
Effekten av vägar och bebyggelse på björnens utbredning ...........................................................27<br />
Skador på tamdjur och bin orsakade av björn................................................................................28<br />
<strong>Björnen</strong>s effekt på rennäringen......................................................................................................30<br />
<strong>Björnen</strong>s inverkan på jaktuttag av älg ...........................................................................................31<br />
Vilken fara utgör björnen för människor? .....................................................................................32<br />
FRAMTIDSSCENARIO ...............................................................................................................................34<br />
BIBLIOGRAFI ...........................................................................................................................................37<br />
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