Across two spawning seasons, researchers have exposed Atlantic cod to powerful blasts from airguns during spawning and tracked the behaviour of the fish. The results have now been published.
Before surveying the area, scientists expected to find large areas of untouched seabed – and the odd trawl mark left by fishing boats. What they actually found was nothing like that.
They combined off-the-shelf products with a new, dynamic strategy: moving the salmon down – and up – away from the lice.
Four students were nevertheless able to complete their master’s projects in Norway. They have now returned to their home country with lots of valuable skills.
This autumn there has been a big increase in the number of string jellyfish along the coast. This colonial jellyfish can reach lengths of up to 30 metres and it can be fatal to farmed fish.