That's an interesting link Alouette.
My initial response to 'fisherman' was 'Fisher King', so I googled till I found a version of the legend / myth that might correspond to the song.
The lyrics lament being abandoned by a lover, whose departure leaves him wounded...
we discussed above that he felt she was the arbiter of his destiny. In effect, he is damaged or wounded. Often the Fisher King's appellation is the 'Wounded King'.
The following is a literary reference:
Chrétien de Troyes' Perceval http://www.lib.rochester.edu/camelot/fisherking/fkessay.htm"As a literary character, the Fisher King originates in Chrétien de Troyes' Perceval. The reader first encounters the Fisher King when Perceval meets a fisherman who offers Perceval lodging. In his castle, the fisherman reveals himself to be a king who is weak and bedridden, and yet has such an abundance of wealth that he can provide his guest a grand feast. During the feast, Perceval witnesses a Grail Procession but fails to ask his host any questions pertaining to what he sees. As a result, all the inhabitants of the castle disappear the next morning (Chrétien de Troyes 32-37).
The fisherman is later said to be the rich Fisher King who "was wounded in a battle and completely crippled, so that he's helpless now, for he was struck by a javelin through both his thighs; and he still suffers from it so much that he can't mount a horse. But when he wants to engage in some pleasure and sport he has himself placed in a boat and goes fishing with a hook" (38). His healing depends on Perceval and his asking of the necessary Grail questions, such as "who does the Grail serve?" and "what is the meaning of the Bleeding Lance?" (38-39). This description, of
a suffering king who depends for his healing on another person, becomes the prototype for all variations of the Fisher King in literature."
I know this is a stretch, but I'm enjoying the discussion.