| ulcerative disease outbreak in crayfish orconectes propinquus linked to saprolegnia australis in big muskellunge lake, wisconsin. | crayfish populations in the area of the north temperate lakes long term ecological research (lter) project, wisconsin, usa, have been monitored for >25 yr. in 2005, native crayfish orconectes propinquus from big muskellunge lake were found with ulcerated lesions in the cuticle. in 2006, lesions occurred in 9.5% of sampled crayfish from the lake (n=3146). ulcers generally occurred on the appendages of affected individuals but varied in location and severity. the prevalence of ulcers varied widely ... | 2010 | 20853742 |