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Thornback ray (Raja clavata) in divisions 7.a and 7.f-g (Irish Sea, Bristol Channel, Celtic Sea North)
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Species: Raja clavata
Stock code: rjc.27.7afg
Assessment Year:2018
Purpose:Advice
Assessment Key: 9997
Stock Key: 169204

 
 
 
 
 
 
 
 
       

 



YearBiomass IndexLandings
   
 kg/hourtonnes
19931.26 
19941.38 
19952.17 
19961.74 
19971.73 
19982.23 
19991.87 
20001.18 
20011.91 
20021.82 
20032.05 
20044.37 
20051.69 
20061.81 
20071.47 
20082.06 
20092.62671
20102.56780
20111.79944
20121.931165
20133.261048
20143.42790
20152.18903
20164.64861
20175.47876
Average2.34893

 


 
 Fishing pressure Stock size
  201520162017  201520162017
Maximum sustainable yieldFMSYUnknown MSY BtriggerUndefined
Precautionary approachFpa,FlimUnknown Bpa,BlimUndefined
Management planFMGTNot applicable BMGTNot applicable
Qualitative evaluation-Unknown -Increasing
 
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