00000nam 2200000za 4500 9.814004 CaOODSP 20240527135429 cr ||||||||||| 160330s2015 oncobd ob f000 0 eng d 978-0-660-05005-8 CaOODSP eng n-cn--- CW69-14/492-2016E-PDF COSEWIC assessment and status report on the Rainbow Villosa iris in Canada [electronic resource] / Committee on the Status of Endangered Wildlife in Canada. COSEWIC status report on the Rainbow Villosa iris in Canada 2015 Ottawa : Environment Canada, Canadian Wildlife Service, COSEWIC Secretariat, c2015. xii, 82 p. : photos, maps, charts. Issued also in French under title: Évaluation et rapport de situation du COSEPAC sur la Villeuse irisée Villosa iris au Canada. "Special concern 2015"--Cover. Includes bibliographical references (p. 63-76). This small mussel is widely distributed in southern Ontario. Surveys since the previous assessment in 2006 have found large numbers of individuals in previously unknown localities, especially at headwaters of larger rivers. There is strong evidence of recent recruitment in six of the seven subpopulations examined. Although it has been lost from Lake Erie and the Detroit and Niagara Rivers, it was apparently never common in these waters. Two subpopulations (Ausable River and Lake St. Clair) have low abundance and are showing signs of continued decline. Ongoing threats to some subpopulations include invasive species (dreissenid mussels and Round Goby) and pollution (household sewage and urban wastewater as well as agricultural effluents). The species may become Threatened if threats are not effectively managed or mitigated. gccst Endangered species Committee on the Status of Endangered Wildlife in Canada. Canadian Wildlife Service. Évaluation et rapport de situation du COSEPAC sur la Villeuse irisée Villosa iris au Canada (CaOODSP)9.814005 PDF 2.09 MB https://publications.gc.ca/collections/collection_2016/eccc/CW69-14-492-2016-eng.pdf