Posted onMay 6, 2022|Comments Off on Ancient polar bear remains explained by sea ice and polynyas: my peer-reviewed paper
My open-access, peer-reviewed paper on the ecology of ancient polar bears in relation to sea ice has just been published in Open Quaternary. It’s called ‘Polar Bear Fossil and Archaeological Records from the Pleistocene and Holocene in Relation to Sea Ice Extent and Open Water Polynyas’.
A unique compilation of more than 104 polar bear skeletal records from the Holocene and late Pleistocene shows that most ancient remainsare associated with existing or ancient open water polynyas or the expansion of sea ice during past cold periods. This big-picture analysis indicates that as they do today, polar bears were most commonly found near polynyas throughout their known historical past because of their need for ice-edge habitats.
Read my longer summary below and download the paper here. This is a much-updated and expanded analysis based on an informal study I did in 2012.
Posted onJanuary 24, 2018|Comments Off on Early Holocene polar bear skeleton from Norway vs. other ancient remains
A press release issued yesterday (23 January 2018) by the University of Stavanger tells the story of decades of work on the most complete ancient polar bear skeleton in the world, found in 1976 in southern Norway, that culminated in an articulated museum display. This specimen was described in my research paper, Annotated Map of Ancient Polar Bear Remains of the World (Crockford 2012), which shows how many very early Holocene remains have been found outside current polar bear range.
There is but one exception to this pattern: Zhokhov Island in the East Siberian Sea, Russia (see Fig. 1 below). Almost four hundred polar bear bones were recovered from two of the 13 semi-subterranian houses discovered on the island, well-preserved by permafrost for over 8,200 years. It is by far the largest – and the oldest – collection of polar bear bones left by human hunters anywhere in the world and it is described in a fascinating paper published in 1996 by Vladimir Pitul’ko and Aleksey Kasparov [contact me if you’d like to see it].
The East Siberian Islands are included in the Laptev Sea subpopulation of polar bears, the only Russian region that contributes a count (800-1,200 bears) to the global population estimate, based on an aerial survey conducted in 1993 (see previous post here).
Figure 1. Map of the New Siberian Islands off Siberia, with tiny Zhokhov Island circled. Map from Wikipedia