Fishing incurs costs from many different aspects the vessel itself, fuel, fishing equipment, crew, licences, and so forth. Making sure every bit of a catch counts as income is essential especially where fishers are running on tight margins.
Salmon migrating from the open ocean to inland waters do more than swim upstream. To navigate the murkier freshwater streams and reach a spot to spawn, the fish have evolved a means to enhance their ability to see infrared light. Humans lack this evolutionary …
