Birdsnest
Well-Known Member
I'm posting this separately with the hopes that the topic can remain the centre of the discussion but there is no doubt that some will have difficulty with that and continue to deflect from topics by dismissing participants contributions by using terms such a "PR Machine", "Industry representatives" etc.
Lets just have a discussion and not a competition.
Anyway, here it is:
http://www.dfo-mpo.gc.ca/Library/322459.pdf
From the paper:
"Our main conclusions are that the “individual” cage-reared salmon consume few number of wild fish or plankton. Given the results examined, we were unable to extrapolate the potential impact from the entire “population” of cage-reared fish on wild prey. We found that the most common wild organisms consumed were caprellids, which live on the side of net pen cages. We found few fish in the gut samples, most of those were juvenile herring. We cannot rule out the possibility that some larval stages of fishes were consumed and digested. Most larval fish are quite small (<1cm) in length and may not be recognizable in gut contents, even after short periods (< 1 hour) of digestion. None were noted in stomachs from cage-reared salmon analyzed for gut contents. However, if fish were frequently consumed, they might not have been recognizable, even after very short periods of digestion. "
Lets just have a discussion and not a competition.
Anyway, here it is:
http://www.dfo-mpo.gc.ca/Library/322459.pdf
From the paper:
"Our main conclusions are that the “individual” cage-reared salmon consume few number of wild fish or plankton. Given the results examined, we were unable to extrapolate the potential impact from the entire “population” of cage-reared fish on wild prey. We found that the most common wild organisms consumed were caprellids, which live on the side of net pen cages. We found few fish in the gut samples, most of those were juvenile herring. We cannot rule out the possibility that some larval stages of fishes were consumed and digested. Most larval fish are quite small (<1cm) in length and may not be recognizable in gut contents, even after short periods (< 1 hour) of digestion. None were noted in stomachs from cage-reared salmon analyzed for gut contents. However, if fish were frequently consumed, they might not have been recognizable, even after very short periods of digestion. "