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Witch (Glyptocephalus cynoglossus) in Subarea 4 and divisions 3.a and 7.d (North Sea, Skagerrak and Kattegat, eastern English Channel)
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DOI: 10.17895/ices.data.10139
Species: Glyptocephalus cynoglossus
Stock code: wit.27.3a47d
Assessment Year:2020
Purpose:Advice
Assessment Key: 13549
Stock Key: 169309

 
 
 
 
 
 
 
 
       

 



YearRecruitment97.5%2.5%Spawning Stock Biomass (SSB)97.5%2.5%LandingsDiscardsFishing pressure97.5%2.5%BMS 
 Age 1       Ages 4-8    
 Number of individuals in thousands (x1000)  tonnes  tonnestonnesYear-1   t 
19502609248585140123586743717302379 0.290.530.159  
19512704449358148183539734817052568 0.300.550.164  
19523007154510165893378712816012554 0.310.570.167  
19533361160031188193109675314312263 0.300.580.159  
19543546863367198522870635612961590 0.280.540.142  
19553388961854185672873641312872027 0.290.570.149  
19562858253510152672899641513101936 0.290.560.148  
19572351744866123263016654513891991 0.290.560.151  
19582080839058110863172676814872678 0.310.590.166  
19592010836773109953133664914772333 0.320.600.167  
19601912035710102372990646713822563 0.330.630.174  
1961170213223789872676602511892093 0.320.630.165  
1962151592835181062384553310281419 0.300.590.148  
196313898259867433225452909601523 0.310.610.154  
196412279236526374212150009001760 0.330.650.167  
196510724209415492187944377961356 0.320.640.161  
196610601202425552167439747051137 0.310.630.157  
196712461228116807152636376401125 0.330.650.163  
196816976301649554137733365681174 0.340.690.170  
196921685384701222411962964482891 0.320.670.156  
197024555439811370910952706443597 0.280.600.135  
197124667440621380911652783488843 0.300.610.144  
197224574444461358713252988587908 0.300.600.147  
1973243184393813459158034127321494 0.310.610.161  
1974247914501113654176236908411138 0.290.570.152  
1975266824842214703198941019651841 0.310.590.167  
19763081455421171322065423510071496 0.300.560.162  
19773904869067220772159441710551618 0.300.560.164  
19785007986497289952238454611021664 0.300.550.166  
197958533102911332922354468211831572 0.290.520.162  
198059534106428333022614499713671883 0.290.510.167  
198156338101173313723033548116791933 0.280.480.168  
19825333695837296833715633021803155 0.310.490.192  
19835185092936289274305697226593606 0.320.480.21  
19845359194854302784631730229363903 0.320.480.21  
19855571197341318854774746630533979 0.320.480.22  
19865587598365317394816751530863579 0.310.460.21  
19875096591206284784847756631053700 0.310.460.21  
19884516181967248824877755931473290 0.300.430.20  
19894118974762226935120784033433841 0.300.430.21  
19904100173568228515204784234543862 0.300.420.21  
19914304276389242525205772935063641 0.280.400.20  
19924696282529267235042742434243164 0.270.380.191  
19934999387783284724891719133262673 0.250.360.179  
19945169391937290654803705432712696 0.250.360.178  
19955132691185288904911721433432810 0.250.360.180  
19965061088930288024972726134042790 0.260.370.184  
19974840285053275455137749735213494 0.290.410.20  
19984520980304254525060744034413786 0.320.450.22  
19994163374789231764812721132114024 0.350.510.24  
20003974571509220914454682229084422 0.390.560.27  
20014134771374239524068627526384206 0.410.590.29  
2002402836853323678361355512352381315290.420.600.30  
200335667599632121532234820215533083490.430.590.31  
200427864466891663028954147202130593690.430.570.32  
200524109401781446727243699200629604190.410.530.32  
200625322409461565926093381201323352960.380.470.30  
200722939382031377426083283207122711990.360.440.29  
200848202729743183925163132202119993180.350.430.28  
2009899701316926146722942893181918634550.360.450.28  
2010863191277725831522202847173115315590.320.410.25  
201142216631012824326213403202015675470.240.320.179  
201232683489542182034414519262019525550.200.270.150  
201334382518842278444515950332920132540.1920.260.140  
201434253524932235154487430399526853070.210.280.152  
201522471349281445756427848405622404490.1960.270.140  
20161340621750826359108409415427443900.1890.270.132  
201724699411631482062179154422328502360.200.300.1400.085 
201818469324571050962769684406730101990.1920.290.1260.378 
201936285705871865259939860364225802160.200.320.1281.09 
202024699  5598         
Average35436618392058534795829211524254250.300.500.1890.518 

 


 
 Fishing pressure Stock size
  201720182019  201820192020
Maximum sustainable yieldFMSYAbove MSY BtriggerAbove trigger
Precautionary approachFpa,FlimHarvested sustainably Bpa,BlimFull reproductive capacity
Management planFMGTNot applicable BMGTNot applicable