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Old 06-21-2010, 05:05 PM
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Default Gill Lice In Popular Driftless Stream

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I sent this photo to Dave V and asked him if this Gill Lice was a serious threat.

This was his response:

Len,
It is unlikely gill lice will destroy all of the brookies in **** Creek although I have seen infestations that were heavy enough (***** Creek, Monroe Co.) to interfere with the fish's respiration leaving them vulnerable if dissolved oxygen levels are reduced. The infestations seem to worsen when fish are stressed (low water levels or high water temps) but may totally disappear when conditions are good. We are aware of the problem and will continue to monitor but there is little that can be done (the only good way to remove gill lice from fish is with a formalin dip).
Dave

David Vetrano
Fisheries Supervisor
3550 Mormon Coulee Rd.
La Crosse WI, 54601
608-785-9009
David.Vetrano@dnr.state.wi.us



I have another email out to Dave asking if the gill lice can be transferred by an angler to another stream on gear/net/waders. Will update when he responds.
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Old 06-22-2010, 10:49 AM
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Default Re: Gill Lice In Popular Driftless Stream

Len,
Anglers should get in the habit of disinfecting their waders, shoes and landing nets that touched stream water or fish before they move from one stream to another to prevent transfer of a variety of diseases and parasites. We use a 1% bleach solution to rinse off our waders and electrofishing gear before we move from stream to stream when we are doing fish surveys (a small spray bottle works well for waders). If you're not going to fish for awhile, letting your gear dry completely can also be effective (most aquatic parasites cannot tolerate dessication).
Dave
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