Full title: "Re-hashing a 25 year old theory on how Salmon might find their way back to their Scottish birthplace".
Wonder what it is that Leeds them back.
I think the bigger puzzle is how do they find there way to Norway and Greenland?
They can be imprinted on their journey with the route they took but they have never been to the feeding grounds before.
On a trip to Scotland last year my party walked across a bridge and observed salmon going/jumping back up a river. Don’t ask me what river.
FYI, PBS is currently running a superb series on volcanoes. A recent episode dealt with how certain Alaskan salmon adapted some 2000 y ears ago, when a volcano erupted and completely blocked their access to the rivers and streams where they spawned. They were somehow, immediately able to modify their behavior. The episode should be on the PBS website.
GPS
A sixth sense that humans have lost or never needed
