Fortunately, for us the problem had been solved a long time ago by Inuit hunters. They figured out their dogs could smell the seal holes under the snow. |
If you have lots of small isolated populations, each one of them is more vulnerable to local extinction. |
What happens is that the seal swims up through an open net into the breathing hole. We hear the seal breathing through a microphone and transmitter that we've placed in the snow and that transmits back to our hut. |