I am studying SFL grammar and I have this sentence that I need to break down into clauses and say what type of clauses they are.
Studies show that when caught by fishermen, sea trout are more likely to be returned to the water than salmon.
I assume that the first part is a projecting clause, but it is the "when caught by fishermen" that perplexes me.
Is it an embedded clause within the projecting clause?
Or is it an embedded 'by'-clause with ellipted participant and process -- "when caught by fishermen"?