Actually it isnt really hysteria. NZ is not affected by whirling disease (there are other parasites and viruses that do similar damage though) like many other countries. YES people are trying to protect their income.....wouldnt you? Relaxing the regulations and allowing trout to be sold in restaurants would create a multi million dollar poaching market, and access to waterways would eventually be stopped completely
Whirling disease is an important factor as it is a parasite that attacks the nervous and cartilage system of trout. I do not know whether it affects other species that are not in the salmonoid family but you never know. Something else to note. Whirling disease
Quote from www.whirlingdisease.org
"Whirling disease" is a disease of Salmonid fish (trout, salmon, whitefish) caused by a microscopic parasite known as Myxobolus cerebralis. This tiny parasite has a fairly complicated life cycle which involves two hosts; a small worm(tubifex, sludge ) that lives on the bottom of a stream or other body of water, and a fish. The fish becomes infected after a form of the parasite (the TAM stage) emerges from the worm and enters the water column. The parasite finds a fish, attaches to the fish and penetrates the skin. The parasite eventually finds its way to the cartilage of the fish where it matures into the mature whirling disease spore. It stays there until the fish dies, releasing spores into the water, which ultimately are ingested by the worms and the life cycle starts all over.
There is a lot of information available online about whirling disease and trout and salmon importation.
Who is to say that NZ native fish would not be affected???????