Northern Brook Lamprey Saskatchewan - Nelson River populations
Scientific Name: Ichthyomyzon fossor
Other/Previous Names: Northern Brook Lamprey (Saskatchewan - Nelson population)
Taxonomy Group: Fishes
COSEWIC Range: Manitoba
COSEWIC Assessment Date and Status Change: November 2020
COSEWIC Status: Endangered
COSEWIC Status Criteria: B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v)
COSEWIC Reason for Designation: This small, nonparasitic lamprey has a very limited distribution in the Winnipeg River watershed in southeastern Manitoba. The number of mature individuals is declining based on observed reductions in extent of occurrence, area of occupancy, and number of locations, and an inferred decline in quantity and quality of aquatic habitat. These populations are exposed to threats, such as decreases in stream flows under current and future climates, and are very susceptible to anticipated increases in water temperature. Substantial recent targeted sampling, using both conventional methods and environmental DNA (sampling water to confirm presence of DNA from the species), now provides sufficient data to conclude that this species is at risk of extinction.
COSEWIC History of Status Designation: The species was considered a single unit and designated Special Concern in April 1991. When the species was split into separate units in April 2007, the "Saskatchewan-Nelson population" unit was designated Data Deficient. Status re-examined and designated Endangered in November 2020.
SARA Status: Schedule 3, No Status - (SARA Schedule 1 provisions do not apply)
Date of Listing (yyyy-mm-dd):
Please note that this information is provided for general information purposes only. For the most up to date and accurate list of species listed under the Species at Risk Act, please see the Justice Laws Website.
|Northern Brook Lamprey||Non-active||Special Concern|
Species that have been designated at risk by COSEWIC since the Species at Risk Act (SARA) was written must be added to Schedule 1 through a regulatory amendment. Information on this procedure is available in the Assessment section. If Northern Brook Lamprey, Saskatchewan - Nelson River populations, is added to Schedule 1, it will benefit from the protections afforded by SARA. More information about SARA, including how it protects individual species, is available in the Species at Risk Act: A Guide.
Provincial and Territorial Protection
PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.
5 record(s) found.
- COSEWIC Status Reports (2 record(s) found.)
- Response Statements (1 record(s) found.)
- COSEWIC Annual Reports (2 record(s) found.)
COSEWIC Status Reports
COSEWIC Assessment and Update Status Report on the Northern Brook Lamprey (Ichthyomyzon fossor) (Great Lakes – Upper St. Lawrence populations and Saskatchewan – Nelson population) in Canada (2007-08-30)The Northern Brook Lamprey is one of six species of the genus Ichthyomyzon. It is eel-like in appearance, reaches approximately 160 mm in length as an adult, and is non-parasitic. Adults can be distinguished from other lampreys by a single dorsal fin and characteristic teeth patterns. Ammocoetes (larval lampreys) within the genus are generally indistinguishable from one another. Some recent genetic analyses have questioned whether this species is truly distinct from the silver lamprey. Although its taxonomic status has been the subject of some debate, this question has not yet been resolved and pending resolution it is herein recognized as a distinct species.
COSEWIC Annual Reports
COSEWIC Annual Report - 2007 (2007-08-30)2007 Annual Report to the The Minister of the Environment and the Canadian Endangered Species Conservation Council (CESCC) from the Committee on the Status of Endangered Wildlife in Canada.
COSEWIC Annual Report 2020 to 2021 (2021-10-12)Over the past year COSEWIC assessed a total of 66 wildlife species, of which 4 were assigned a status of Not at Risk. Of these 66, COSEWIC re-examined the status of 41 wildlife species; of these, 80% were reassessed at the same or lower level of risk. To date and with the submission of this report, COSEWIC’s assessments now include 826 wildlife species in various risk categories including 369 Endangered, 196 Threatened, 239 Special Concern, and 22 Extirpated (i.e. no longer found in the wild in Canada). In addition, 19 wildlife species have been assessed as Extinct, 62 wildlife species have been designated as Data Deficient, and 202 have been assessed as Not at Risk.