Redbreast sunfish (Lepomis auritus) COSEWIC assessment and status report: chapter 11
Technical Summary
Lepomis auritus
Redbreast sunfish – Crapet rouge
Range of Occurrence in Canada:
New Brunswick
Extent and Area Information
Extent of occurrence (EO) (km²)
[Polygon Method using Figure 3]
~ 25,000 km²
Specify trend in EO
Stable
Are there extreme fluctuations in EO?
No
Area of occupancy (AO) (km²)
[See Distribution for methodology of estimates]
Unknown, but > 1450 km² < 2800 km²
Specify trend in AO
Unknown, possible decrease
Are there extreme fluctuations in AO?
Number of known or inferred current locations
15
Specify trend in #
Although found at 2 new sites since 1989 its presence at 4 (pre-1989) sites is unconfirmed, voucher specimens for 3 sites are unavailable and these sites have been re-sampled since the 1970s. Uncertain, may be decrease
Are there extreme fluctuations in number of locations?
No
Specify trend in area, extent or quality of habitat
Stable
Population Information
Generation time (average age of parents in the population)
4 yr
Number of mature individuals
Unknown
Total population trend:
Unknown
% decline over the last/next 10 years or 3 generations.
Unknown
Are there extreme fluctuations in number of mature individuals?
Unknown
Is the total population severely fragmented?
Yes
Specify trend in number of populations
Unknown
Are there extreme fluctuations in number of populations?
List populations with number of mature individuals in each:
- Yoho Lake, NB - 743 (2007)
- Anne Lake (unknown)
- Oram Lake (abundant, 1999)
- Oromocto Lake (unknown)
- South Oromocto River (continued presence unconfirmed)
- Oromocto River (unknown)
- Swan Creek Lake (unknown)
- Saint John River (unknown)
- George Lake (unknown)
- Kennebecasis River (continued presence unconfirmed)
- Canaan River (continued presence unconfirmed)
- Rusagonis Stream (continued presence unconfirmed)
- Modsley Lake (questionable record, unconfirmed)
- Knockdrin Lake (questionable record, unconfirmed)
- Shadow Lake (questionable record, unconfirmed)
Threats (actual or imminent threats to populations or habitats)
Shoreline development for cottages and year-around residences, urban and, agricultural, industrial and forestry practices leading to habitat loss and degradation.
Rescue Effect (immigration from an outside source)
Unlikely
Status of outside population(s)? [other jurisdictions or agencies]
USA: common and widespread over its range
Is immigration known or possible?
Natural immigration unlikely
Would immigrants be adapted to survive in Canada?
Yes
Is there sufficient habitat for immigrants in Canada?
Yes
Is rescue from outside populations likely?
Unknown
Quantitative Analysis
Not Applicable
Existing Status
- Nature Conservancy Ranks (NatureServe 2006)
- Global – G5
- National
- US – N5
- Canada – NNR
- Regional – U.S.
- AL – S5
- AR – S4?
- CT – S5
- DE – S4
- DC – S5
- FL – SNR
- GA – S5
- KY – SNA
- LA – SNA
- ME – SU
- MD – S5
- MA – S3
- MI – SNA
- NH – S4
- NJ – S5
- NY – S3
- NC – S5
- OK – SNA
- PA – S5
- RI – S3
- SC – SNR
- TN – S5
- TX – SNA
- VT – S4
- VA – S5
- WV – S5
- Canada: NB – S4
- Wild Species 2005 (Canadian Endangered Species Council 2006)
- Canada – 4
- NB – 4 (secure)
- COSEWIC
- Special Concern 1989
- Data Deficient 2008
Status and Reasons for Designation
Status: Data Deficient
Alpha-numeric code: Not Applicable
Reasons for Designation: Insufficient information to determine actual distribution, number of locations, and population sizes and trends.
Applicability of Criteria
Criterion A (Declining Total Population): Not Applicable - total population unknown and there is insufficient information on which to determine population trends.
Criterion B (Small Distribution, and Decline or Fluctuation): Not Applicable - total population unknown and there is insufficient information to determine AO and population trends.
Criterion C (Small Total Population Size and Decline): Not Applicable - total population unknown and there is insufficient information on which to determine population trends.
Criterion D (Very Small Population or Restricted Distribution): Not applicable - the number of mature individuals, although unknown would be in excess of 1000, the AO is well in excess of 20 km², and there are more than five known locations.
Criterion E (Quantitative Analysis): Not Applicable – no data.
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