Browsing NINA Brage by Author "Prop, Jouke"
Now showing items 1-4 of 4
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Climate change and the increasing impact of polar bears on bird populations
Prop, Jouke; Aars, Jon; Bårdsen, Bård-Jørgen; Hanssen, Sveinn Are; Bech, Claus; Bourgeon, Sophie; Fouw, Jimmy de; Gabrielsen, Geir W.; Lang, Johannes; Noreen, Elin; Oudman, Thomas; Sittler, Benoit; Tombre, Ingunn; Wolters, Eva; Moe, Børge; Stempniewicz, Lech (Peer reviewed; Journal article, 2015)The Arctic is becoming warmer at a high rate, and contractions in the extent of sea ice are currently changing the habitats of marine top-predators dependent on ice. Polar bears (Ursus maritimus) depend on sea ice for ... -
Identifying individual polar bears at safe distances: A test with captive animals
Prop, Jouke; Staverløkk, Arnstein; Moe, Børge (Peer reviewed; Journal article, 2020)The need to recognise individuals in population and behavioural studies has stimulated the development of various identification methods. A commonly used method is to employ natural markers to distinguish individuals. In ... -
Isbjørnens effekt på fugl i et arktisk klima i endring. Sluttrapport for Svalbards miljøvernfond
Moe, Børge; Prop, Jouke; Aars, Jon; Bårdsen, Bård-Jørgen; Hanssen, Sveinn Are; Bech, Claus; Bourgeon, Sophie; Fouw, Jimmy de; Gabrielsen, Geir Wing; Lang, Johannes; Noreen, Elin; Oudman, Thomas; Sittler, Benoit; Stempniewicz, Lech; Tombre, Ingunn; Wolters, Eva (NINA Rapport;1163, Research report, 2015)Arktis blir stadig varmere og utbredelsen av havis blir mindre. Det forandrer leveområdet til de mange artene som er avhengige av havis. Isbjørnen er avhengig av havis for å jakte på sel, og økende lengde på den isfrie ... -
Land‑based foraging by polar bears reveals sexual conflict outside mating season
Prop, Jouke; Black, Jeffrey M.; Aars, Jon; Oudman, Thomas; Wolters, Eva; Moe, Børge (Peer reviewed; Journal article, 2024)According to sexual selection theory, the sexes are faced with opposing evolutionary goals. Male fitness benefits from access to females, whereas female fitness is constrained by food resources and safety for themselves ...