I haven't had telephone or electricity for a week so have not been able to run down the facts behind this article (hope to have power next week). The only NZMS in the country who can thrive in lakes is a strain found in the Great Lakes. The guys we have in California are obligate river dwellers. Either the Shasta snails have evolved from our river strain (not too far fetched) or they were transplanted from Lake Ontario. In either case we are presented with an interesting scenario.
Huck - the females are parthenogenetic.
SF- Wading gear can transport didymo, whirling disease, millfoil, NZMS, zebra mussels, and a limitless number of other nasties. I believe both Patagonia and SIMMS provide literature in their wader boxes that is produced by "protect your waters"
http://www.protectyourwaters.net/
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