COSEWIC assessment and status report on the Rainbow Villosa iris in Canada / Committee on the Status of Endangered Wildlife in Canada.: CW69-14/492-2016E-PDF

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.

Permanent link to this Catalogue record:
publications.gc.ca/pub?id=9.814004&sl=0

Publication information
Department/Agency Committee on the Status of Endangered Wildlife in Canada.
Canadian Wildlife Service.
Title COSEWIC assessment and status report on the Rainbow Villosa iris in Canada / Committee on the Status of Endangered Wildlife in Canada.
Variant title COSEWIC status report on the Rainbow Villosa iris in Canada 2015
Publication type Monograph
Language [English]
Other language editions [French]
Format Electronic
Electronic document
Note(s) 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).
Publishing information Ottawa : Environment Canada, Canadian Wildlife Service, COSEWIC Secretariat, c2015.
Description xii, 82 p. : photos, maps, charts.
ISBN 978-0-660-05005-8
Catalogue number
  • CW69-14/492-2016E-PDF
Subject terms Endangered species
Request alternate formats
To request an alternate format of a publication, complete the Government of Canada Publications email form. Use the form’s “question or comment” field to specify the requested publication.
Date modified: