Based on the ICES approach for data-limited stocks, ICES advises that catches should be less than 220 tonnes.
This is the first year that ICES is providing quantitative advice for data-limited stocks (see Quality considerations).
Overall Assessment Results
|Figure 220.127.116.11 Turbot in Subdivisions 22–32 (Baltic Sea). ICES estimates of 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 (SD) 22–28 (data from ICES DATRAS database, right panel). |
Assessment ModelQuality consideration
Almost all aspects of data collection need to be improved to get a better understanding of the state of turbot in the Baltic.
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
|Assessment type ||Survey trends. |
|Input data ||Commercial landings and survey data from the Baltic International Trawl Survey (BITS-Q1+Q4). |
|Discards and bycatch ||Information not available. |
|Indicators ||None. |
|Other information ||None. |
|Working group report ||WGBFAS |