Narwhals in a sentence

Mark added it isn’t uncommon to see polar bears, narwhals and bowhead whales near Kugaaruk.

Menopause may explain why some female whale species such as belugas and narwhals live around 40 years longer than others, scientists have said.

Episode 1, “The Great Melt,” reveals how the summer melt of Arctic ice opens up nearly 3 million square miles of ocean and land to beluga whales, foxes, seabirds and narwhals.

Adult narwhals mate in April or May when they are in the offshore pack ice.

As such, despite changing conditions narwhals will continue returning to the same areas during migration.

Conservation issues Narwhals are one of many mammals that are being threatened by human actions.

Diet Narwhals have a relatively restricted and specialized diet.

Due to strong site fidelity, changes in weather and ice conditions are not always associated with narwhal movement toward open water and therefore more data is needed to determine how vulnerable narwhals are to future sea ice changes.

In repeated attempts in the 1960s and 1970s, narwhals kept in captivity died within months.

In the winter, the male narwhals occasionally dive up to convert in depth, with dives lasting up to 25 minutes.

It evolved in the late Pliocene, and so is moderately accustomed to periods of glaciation and environmental variability. citation An indirect danger for narwhals associated with changes in sea ice is the increased exposure in open water.

Life span and mortality A polar bear scavenging a narwhal carcass Narwhals can live up to at least 50 years.

Male narwhals attain sexual maturity at 11 to 13 years of age, when they are about convert long.

Mortality often occurs when the narwhals suffocate after they fail to leave before the surface of the Arctic waters freeze over in the late autumn.

Most of the world's narwhals are concentrated in the fjords and inlets of Northern Canada and western Greenland.

Narwhals are difficult to keep in captivity.

Narwhals are mammals and need air to breathe, so when open water is no longer accessible and the ice is too thick for them to break through, they can drown.

Narwhals, being black, hunt in large pods in the aphotic zone, but their underbelly still remains white to remain camouflaged when something is looking directly up or down at them.

Narwhals can also die of starvation, especially the young.

Narwhals from Canada and West Greenland winter regularly in the pack ice of Davis Strait and Baffin Bay along the continental slope with less than 5% open water and high densities of Greenland halibut.