Ten walruses in Greenland have been fitted with satellite tags in a new bid to confirm whether the blubbery beasts spend their summers in Canada.

- 09 / 05 / 2008 15:18

Last year, the same team tagged eight walruses in west Greenland; however, all but one of the sat-tags failed.

The lone working device, fitted to a female walrus, revealed that she had journeyed to Baffin Island, Canada.

The team now awaits the results of the latest study to see if this spot really is the walruses' secret summer hideout.

Until now, scientists have not known exactly where west Greenland's walruses migrate - come summer, the enormous animals simply vanish off the radar.

Like in 2007, the tagging team faced tough conditions when they set sail on the Arctic sea in late April.

Rune Dietz, who led this year's expedition, said: "There were severe ice conditions.

"At one point, there were discussions as to whether the boat would be able to get out of Sisimiut (a town in west Greenland) at all."

The team managed to tag 10 walruses, using small, matchbox-sized satellite tags, which relay coordinates to the researchers via the Argos satellite system.

The devices were attached remotely using a modified harpoon and a CO2-powered gun - because the walruses have such thick skin, they feel little when the devices are secured, say the researchers.

The biologist, who is based at the Danish Natural Environmental Research Institute, said: "Out of the 10 tags we got on, one never gave us a signal, another stopped working after a couple of days, but the rest are signalling well, which is a great start.

"At the moment they are showing that most of the walruses have not yet left west Greenland."