we propose that male polar bears may prepare for successful breeding not only during this period but also throughout the year by getting closer to females. The selective advantages of periodically “closing the proximity gap” might
A predator(捕食性动物) kills and eats other animals as prey(猎物).Sometimes it also becomes food for other predators. Polar bears are the largest of all the land predators. They can run across snow and swim in icy water for hours without rest. Their favorite food is seal. Not all big ...
While I’m not done with polar bears completely, it seems I’ve been so successful at informing the public and defanging the rabid activists that fewer examples of nonsense seem to pop up. And it turns out I have other things I’d like to write about. ...
The Unique Case of Pregnant Polar Bears Go Up Entering the world of polar bears, one might encounter complexities and curiosities that defy common bear behaviors. Among these variations, the behavior of pregnant polar bears is particularly intriguing and raises a common question:Do polar bears hiber...
A predator(捕食性动物) kills and eats other animals as prey(猎物).Sometimes it also becomes food for other predators. Polar bears are the largest of all the land predators. They can run across snow and swim in icy water for hours without rest. Their favorite food is seal. Not all big ...
2016. Demography of an apex predator at the edge of its range: impacts of changing sea ice on polar bears in Hudson Bay. Ecol. Appl. 26: 1302-1320. doi: 10.1890/15-1256. PMID: 27755745.Lunn NJ, Servanty S, Regehr EV, Convers SJ, Richardson E, Stirling I (2016) Demography of an...
A new study finds polar bears in the wild have higher metabolic rates than previously thought, and as climate change alters their environment a growing number of bears are unable to catch enough prey to meet their energy needs.
“Polar bears prey mainly upon ringed seals and, to a lesser degree, on bearded seals.Polar bears appear to be more abundant in polynya areas and along shoreleads, probably because the densities of seals are greater and they are more assessable. For example, between March and June in th...
Polar bears live in the Arctic, on ice-covered waters. Polar bears rely on sea ice to access the seals that are their primary source of food, as well as to
This sudden fall is linked partly to “pizzly” bears taking up polar bears’ ranges, where they outcompete them, but also to polar bears’ highly specialized diets. “Polar bears mainly consumed soft foods even during the Medieval Warm Period, a previous period of rapid warming,” DeSantis...