Traditional industries have substantially declined - even if new variations on old themes, such as the salmon farms of the west, have evolved.
This comparison suggests that some regeneration may occur in the chinook salmon, especially in the upper half of the retina.
Vertical transmission of the parasite may be facilitated by the relative timing of smolt migration and adult lice-infected salmon returning to the coast.
Over the past 20 years this parasite has caused significant economic losses in farmed salmon production and possibly in wild salmonid populations locally.
To increase the readability, the complete curves for a number of the salmon are not shown.
Thus, in isolated hosts, the parasites could either not establish or only reproduce to a limited degree on salmon.
A trifle in a glass bowl, neatly cut bread already buttered, and of course, that most essential for all significant occasions, the red salmon.
Canning of salmon gave rise to similar problems.