For the last 72 hours we have been constantly recording sounds from Qaqaliaq.
We are interested in the day / night variation in the singing. As the recorder goes all the time we also hope to get signals that we do not normally hear on our daily 30 min recordings . For this longer recordings we go out every 6 hours checking and to change batteries. Many people have passed by and asked about the setup and the animals. Some of them have heard the whales live.
Not only whales get recorded Ice moving and cracking is a major part of the sound recordings. Also hunters passing by in fast boats send out powerfull sounds ,and we are now specialists in distinguishing a two stroke from a four stroke engine
On the first night a group of hunters got stuck in the ice almost on top of the hydrophone. A contact person at land was following them pointing out the best leads in the ice. All managed to get the boats over the obstructive ice float and in the water on the other side and from there they were able to reach harbour.
But of course most of all we are interested in sounds from bowheads. We do hear them all the time and several of them at the same time . On Wednesday morning at 06-00 between 6 and 8 animals were slowly milling around on the surface at a max distance of 1500 m from Qaqqaliaq
We have not checked all the recorded files but frequent check up in the real time recordings and the first harddisk brought back home shows plenty of data
The setup is made from a:
Hydrophone –a fixed placed extension cable – powersupply for the hydrophone – preamplifier – computer with a(n) automatic file storing program – and a harddisk.