Long-lines were used by ichthyologists during two seasons. They were also used by commercial fishermen who had used only gill nets before the project. Fishermen were contracted according to the scheme “information for scientists / free gears for fishermen”: In total about 3000 hooks were delivered to contracted fishermen.
After careful examinations of the results following statement about long-lining methods were made:
1. After some learning period the long-lines are quite easy to set out (~20 min for 100 hooks / 100m nets).
2. Long-lines efficiency while catching cod is similar to the gill nets.
3. By-catch of the cod under commercial size limit (L<38 cm) is similar to gill nets (while using typical commercial gill nets with mesh sizes 50-55-60 mm). So, in sense of saving small fish they are not worse, but also not much better.
4. There was no by-catch events of birds or other animals recorded during the use of long-lines. At the same time some ducks (more specifically, long-tailed ducks Clangula hyemalis) were caught using gillnets.
5. Both long-lining and gillnetting caused some by-catch of short-spined sculpin Myoxocephalus scorpius (the species deserves some attention from the point of nature protection).
6. Seals made damage both to long-lines and gill nets. However, it must be mentioned that it is less expensive to repair long-lines. Gill nets, in contrary, should typically be replaced, which costs more.
7. Long-lining for salmon was not that successful as for cod. It seems that it needs more experience and is less efficient.
Results of the project - Long-lines