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COSEWIC assessment and status report on the Bocaccio in Canada

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 locationsKnown 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 habitatOverall 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 individualsOverall 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 eachNot 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