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COSEWIC Assessment and Update Status Report on the Carmine Shiner in Canada

Technical Summary

Notropis percobromus (Cope, 1871)

carmine shiner
tête carminée

Range of Occurrence in Canada: Manitoba, Whitemouth River watershed and other nearby areas of the Winnipeg River watershed in Manitoba


Extent and Area Information

Extent of occurrence (EO)(km2)
See Table 1
~120



Specify trend in EO

unknown

Are there extreme fluctuations in EO?

unknown

Area of occupancy (AO) (km2)
See Table 1

~3.4



Specify trend in AO

unknown

Are there extreme fluctuations in AO?

unknown

Number of known or inferred current locations

Whitemouth, Birch, Bird, and Winnipeg rivers, and the Pinawa Channel.

Specify trend in #

Unknown

Are there extreme fluctuations in number of locations?

No


Specify trend in area, extent or quality of habitat

Unknown


Population Information

Generation time (average age of parents in the population)
2-3 years


Number of mature individuals

Unknown

Total population trend:

Unknown

% decline over the last/next 10 years or 3 generations.




Are there extreme fluctuations in number of mature individuals?

Unknown


Is the total population severely fragmented?

No


Specify trend in number of populations

Unknown

Are there extreme fluctuations in number of populations?

Unknown


List populations with number of mature individuals in each:

Unknown


Threats (actual or imminent threats to populations or habitats)

Overexploitation, species introductions, and pollution have the potential to threaten carmine shiner habitats or populations. However, too little is known of the species’ life history requirements and habitat use to assess the actual threats each may pose. Habitat degradation is likely in some reaches of rivers inhabited by the carmine shiner, particularly related to stream regulation, and poses the most significant threat to survival of the species.


Rescue Effect (immigration from an outside source)

Status of outside population(s)?
USA:
not at risk

Is immigration known or possible?
Unknown, but unlikely due to drainage patterns and intervening unsuitable habitat

Would immigrants be adapted to survive in Canada?

Likely


Is there sufficient habitat for immigrants in Canada?

Unknown


Is rescue from outside populations likely?

Unlikely


Quantitative Analysis

Insufficient data.


Existing Status

  • Nature Conservancy Ranks (NatureServe 2006)
    • Global – G5
    • National
      • US – N5
      • Canada N2
    • Regional
      • US: AR – S4, IL – S3, IN – SNR, IA – S5, KS – S4, MI – SNR, MN – SNR, MO – SNR, ND – S3, OH – SNR, OK – S4, SD – S2, WI – SNR
      • Canada: MB – S2
  • Wild Species 2000 (Canadian Endangered Species Council 2001)
    • Canada - NA
    • MB - 2
  • COSEWIC
    • Designated Special Concern in April 1994. Status re-examined and designated Threatened in November 2001 and in April 2006.

Eligibility for assessment by COSEWIC: Carmine shiner is a named and recognized species. Notropis percobromus (Cope 1871) was a synonymized but available name that was recently resurrected by Wood et al. (2002) for some US populations of what was then called Notropis rubellus, the rosyface shiner. Unpublished morphometric studies by Stewart and Watkinson and genetic studies by Wilson have determined that the Manitoba population is refer able to N. percobromus. The 6th edition of the American Fisheries Society’s Common and Scientific names of fishes from the United States, Canada, and Mexico (Nelson et al. 2004) has accepted this evidence and recognizes the Manitoba population as referable to N. percobromus.


Status and Reasons for Designation

Status: Threatened
Alpha-numeric code: D2

Reasons for Designation: This freshwater fish species occurs in an extremely restricted area of Manitoba. The major threat to the species is the alteration in water flow as a result of stream regulation.


Applicability of Criteria

Criterion A (Declining Total Population):
Not Applicable - Criterion thresholds not met because not known.

Criterion B (Small Distribution, and Decline or Fluctuation):
Meets criteria B1 + 2a (5 locations) but neither b nor c are met.

Criterion C (Small Total Population Size and Decline):
Not Applicable - Criterion thresholds not met because not known.

Criterion D (Very Small Population or Restricted Distribution):
Meets D2 for Threatened (AO about 3.4 <20 km2) and five locations.

Criterion E (Quantitative Analysis):
Not Applicable.