Bocaccio (Sebastes paucispinis) COSEWIC assessment and status report: chapter 14
Technical Summary
Sebastes paucispinis Ayres, 1854
Bocaccio
B.C. Marine Waters
Extent and Area Information
| Extent of occurrence (EO) (km2) | Coastal marine waters of B.C. (perhaps >48 000 km2) |
| specify trend (decline, stable, increasing, unknown) | Perhaps stable |
| are there extreme fluctuations in EO (> 1 order of magnitude)? | No |
| area of occupancy (AO) (km2) | Coastal marine waters of B.C. (perhaps >48 000 km2) |
| specify trend (decline, stable, increasing, unknown) | Perhaps stable |
| are there extreme fluctuations in AO (> 1 order magnitude)? | No |
| number of extant locations | Known from outer coast, Hecate Strait, Strait of Georgia, some inlets. |
| Specify trend in # locations (decline, stable, increasing, unknown) | Unknown |
| are there extreme fluctuations in # locations (>1 order of magnitude)? | No |
| habitat trend: specify declining, stable, increasing or unknown trend in area, extent or quality of habitat | Overall perhaps stable, but declining in Strait of Georgia. |
Population Information
| generation time (average age of parents in the population) (indicate years, months, days, etc.) |
9 years (@M=0.2, age at maturity=4) |
| number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values) | Unknown |
| total population trend: specify declining, stable, increasing or unknown trend in number of mature individuals | Overall unknown. Significant decline off central and southwest coast of Vancouver Island. |
| if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period) | Overall unknown; off west coast of Vancouver Island, > 90% over last 10 years and > 95% over last 20 years (data to 2001). |
| are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)? | Unlikely over short term. |
| is the total population severely fragmented (most individuals found within small and relatively isolated (geographically or otherwise) populations between which there is little exchange, i.e., ≤ 1 successful migrant / year)? | Probably not |
| list each population and the number of mature individuals in each | Not applicable |
| specify trend in number of populations (decline, stable, increasing, unknown) | Not applicable |
| are there extreme fluctuations in number of populations (>1 order of magnitude)? | No |
Threats (actual or imminent threats to populations or habitats) [add rows as needed]
- Commercial harvest, recreational harvest, bycatch from fisheries
Rescue Effect (immigration from an outside source)
| does species exist elsewhere (in Canada or outside)? | Yes (outside Canada) |
| status of the outside population(s)? | In serious decline in U.S. states (Washington, Oregon, California). Unknown in Alaska. |
| is immigration known or possible? | Probably as larvae and juveniles |
| would immigrants be adapted to survive here? | Probably |
| is there sufficient habitat for immigrants here? | Probably |
Quantitative Analysis
No
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