Based on the ICES approach for data-limited stocks, ICES advises that catches should be no more than 68 tonnes.
This is the first year that ICES is providing quantitative advice for data-limited stocks (see Quality considerations).
Overall Assessment Results
|Figure 184.108.40.206 Brill in Subdivisions 22–32 (Baltic Sea). Official landings (in tonnes, left panel). Combined 1st and 4th quarters cpue (no./hr) (weighted average per depth stratum area), of fish equal to or larger than 20 cm, from the Baltic international trawl survey (BITS-Q1+Q4) in Subdivisions 22, 23, and 24 (right panel, from ICES DATRAS database). |
Assessment ModelQuality consideration
Data collection, especially regarding stock structure and stock identification and on the amount of discards, needs to be improved in order to get a better understanding of the state of brill in the Baltic Sea.
The advice is based on a combined abundance index from two surveys, used as an indicator of stock size. The uncertainty associated with the index values is not available.
The methods applied to derive quantitative advice for data-limited stocks are expected to evolve as they are further developed and validated. The harvest control rules are expected to stabilize stock size, but they may not be suitable if the stock size is low and/or overfished.Scientific basis
||Commercial landings and survey data from the Baltic International Trawl Survey (BITS-Q1+Q4).
|Discards and bycatch
||Information not available.
|Working group report