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CELPIP Practice Reading: Reading for Information ID: #63080 Hard Polar bears of Hudson Bay: ice, hunting, and research

Read the following passage.

A. The polar bear is the largest land carnivore, and it depends on sea ice, which it uses as a hunting platform. In Hudson Bay, most or all of the ice melts by mid to late summer, so the whole western Hudson Bay population is forced ashore for two to four months in summer and early fall. On land the bears cannot hunt seals; they live mainly on their fat stores and stay inactive most of the time. In Manitoba, polar bears may not be hunted, even by Indigenous people.

B. Out on the ice, polar bears feed mainly on ringed seals and, less often, bearded seals. They catch seals that surface at breathing holes, creep up on seals lying on the ice, or break into the snow lairs where ringed seals give birth. Smell is their chief hunting sense: a bear can detect a breathing hole covered by 90 centimetres or more of ice and snow up to a kilometre away. If it cannot feed, a polar bear can slow its metabolism to save energy at any time of year, a change that starts after seven to 10 days without food. Young bears in their first year on their own are still learning to hunt, and larger bears often take their catch.

C. Scientists have followed this population for decades; the Canadian Wildlife Service has studied polar bear ecology since 1961. Researchers estimate its size with mark-recapture studies and aerial surveys, and long-term work has documented a fall of more than 25 per cent in its numbers, with some periods of stability. The survival of female bears of all ages was linked to the timing of ice break-up and freeze-up, but the same did not hold for males. Declines in the body condition of females and in reproduction have also been recorded in western Hudson Bay.

D. Some questions have been hard to settle. When scientists reported a decline in the Manitoba part of the range, local knowledge holders suggested that many bears had instead moved north along the Kivalliq coast of Nunavut. Later aerial surveys found no such shift and placed about 95 per cent of the summer bears in Manitoba. Recent counts are harder to read. Different methods produced estimates of 806, 949 and 1,030 bears for 2011, and a 2016 aerial survey gave 842. Because the confidence limits of most of these estimates overlap, the differences between them are not statistically significant.

E. Not given in any of the above paragraphs.

Decide which paragraph, A to D, has the information given in each statement below. Select E if the information is not given in any of the paragraphs.

- 1.
Scent lets these hunters find seals that are hidden from sight.

- 2.
Manitoba made it illegal to kill these bears so that its tourist trade would be protected.

- 3.
Scientists were able to rule out an explanation suggested by residents of the region.

- 4.
For months each year, these bears get by on reserves carried in their own bodies.

- 5.
The bears of this bay have fallen in number faster than any other group in Canada.

- 6.
The timing of the ice appeared to matter for one sex but not for the other.

- 7.
After the survey findings, Nunavut set new limits on how many bears its hunters may take.

- 8.
Even Indigenous hunters in Manitoba are not permitted to take these animals.

- 9.
The gaps between recent population figures could simply be due to chance.

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