Warning This Web page has been archived on the Web.

Archived Content

Information identified as archived on the Web is for reference, research or recordkeeping purposes. It has not been altered or updated after the date of archiving. Web pages that are archived on the Web are not subject to the Government of Canada Web Standards, as per the Policy on Communications and Federal Identity.

Skip booklet index and go to page content

Recovery Strategy for the Lake Chubsucker

Appendix A: Definition of Status Rankings

G-Rank (global): Rank assigned to an element based on its range-wide conservation status rank (G1 to G5, in decreasing order of priority). Elements ranked G1, G2 or G3 are considered imperilled. G-rank is assigned by NatureServe or the conservation data centre responsible for the element in question.

N-Rank (national): Rank assigned to an element based on its national conservation status rank (N1 to N5, in decreasing order of priority). Elements ranked N1, N2 or N3 are considered imperilled.

S-Rank (subnational): Rank assigned to element based on its provincial or state conservation status rank (S1 to S5, in decreasing order of priority. Elements ranked S1, S2 or S3 are considered imperilled).

Definition of Status Rankings
Priority ranking valuePriority ranking definition
S1(extremely rare)Usually 5 or fewer occurrences in the province or very few remaining individuals; often especially vulnerable to extirpation.
S2 (very rare)Usually between 5 and20 occurrences in the province or with many individuals in fewer occurrences; often susceptible to extirpation.
S3 (rare to uncommon)Usually between 20 and100 occurrences in the province; may have fewer occurrences, but with a large number of individuals in some populations; may be susceptible to large-scale disturbances.
S4 (common)apparently secure in Ontario; usually with more than 100 occurrences in the province.
S5 (very common)demonstrably secure in Ontario.

For more information on status ranks see: www.mnr.gov.on.ca/MNR/nhic/