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COSEWIC assessment and status report on the Carmine Shiner and Rosyface Shiner in Canada

Evaluation

 

The Rosyface Shiner has a relatively wide distribution in Canada from southwestern Quebec to southcentral Manitoba.  There is no indication that the species is in decline in Quebec and it is probably secure in that province at present, at least in streams tributary to the Ottawa River which have undergone little or no disturbance since the last surveys undertaken in early 1970s.

There is no evidence that Ontario populations are in decline, although those of southwestern Ontario should be surveyed on a regular basis.  Scott and Crossman (1973) felt that it may be less common in some parts of the range than it was two or three decades ago, but had no evidence to support the supposition.  Streams in southwestern Ontario are subject to a variety of human disturbances which could affect critical habitat resulting in demise of the resident stocks.

The species was brought to the attention of COSEWIC for consideration because of its apparent rarity in Manitoba, where it was supposedly known from only one location in the province, i.e., from the Whitemouth River.  Its presence in Manitoba is undoubtedly of long standing, and it has likely previously escaped detection for a variety of reasons.  However, the species may be of concern there (Manitoba) since it has a restricted distribution and is dependent on clear, fast moving waters which are being threatened by agricultural activity (Stewart, personal communication).