| T O P I C R E V I E W |
| flyfishingandflytying |
Posted - 02/05/2008 : 06:04:55
In the June issue of FF&FT Rod McGill says that combatting Gyrodactylus - should it ever be present in Scotland - will result in a kill-all policy with poison on the whole of the affected catchment - a treatment which has been used successfully in Norway. But could this work in Scotland? |
| 2 L A T E S T R E P L I E S (Newest First) |
| flyfishingandflytying |
Posted - 02/07/2008 : 04:09:36
A recent trip to Norway bore some of the reality of 'living with Gyrodactylus'. There are now disinfection stations all along the (unaffected) rivers, using Virkon treatments and certificates to show proof of disinfection. The damp felt soles of waders are thought of be the highest risk element in transferring the parasite, but waders, rods, reels, and even flies are given the treatment.
The most worrying aspect of all, especially for UK rivers, is that Gyrodactylus can enter a river, but its presence only manifests itself much later when the parr and smolts are affected by the parasite. By then it's too late to prevent the disease spreading, and the river is already destined to lose its year-classes for the immediate future.
We've all read the warnings about Gyrodactylus. The reality is stark, the practicalities of eradication are difficult, and the hassle and troubles of living with a notifiable fish disease are huge. All travelling anglers should take extra responsibility to help keep Gyrodactylus out of Britain. Ironically, despite all the precautions, Norwegian anglers believe that infection is most likely to come from fish farms rather than anywhere else. |
| aliferste |
Posted - 06/05/2008 : 16:38:12
Is there another way of dealing with it ? If not then yes, it would work in Scotland!
I just found out from wikipedia new method of treatment has been introduced, dosing small volumes of aqueous aluminium and sulfuric acid into rivers. An advantage of this method is the possibility to kill the parasite without harming the host. This new method has shown very good and promising results in Batnfjordselva River and Lærdalselva River, two rivers in Norway.
http://urbanflyfisher.com/ |
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