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The vertical distribution of eggs and larvae of Blue whiting (Micromesistius poutassou) and Mackerel (Scomber scombrus in the eastern North Atlantic and North Sea
Coombs, S.H.; Pipe, R.K.; Mitchell, C.E. (1981). The vertical distribution of eggs and larvae of Blue whiting (Micromesistius poutassou) and Mackerel (Scomber scombrus in the eastern North Atlantic and North Sea. Rapp. et Proc.-Verb. Cons. Int. Explor. Mer 178: 188-195
In: Rapports et Procès-Verbaux des Réunions du Conseil Permanent International pour l'Exploration de la Mer. Conseil Permanent International pour l'Exploration de la Mer: Copenhague. ISSN 0074-4336
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Trefwoorden
    Cells > Sexual cells > Eggs > Fish eggs
    Developmental stages > Larvae > Fish larvae
    Distribution > Geographical distribution > Vertical distribution
    Layers > Discontinuity layers > Thermocline
    Stock assessment
    Surveys > Biological surveys > Plankton surveys > Ichthyoplankton surveys
    Micromesistius poutassou (Risso, 1827) [WoRMS]; Scomber scombrus Linnaeus, 1758 [WoRMS]
    Marien/Kust
Auteurs  Top 
  • Coombs, S.H.
  • Pipe, R.K.
  • Mitchell, C.E.
Abstract
    The vertical distributions of eggs and larvae of blue whiting (Micromesistius poutassou ) and mackerel (Scomber scombrus ) in the eastern North Atlantic and North Sea are described from the results of sampling with a Longhurst-Hardy Plankton Recorder. Blue whiting eggs were taken to the west of the British Isles from the surface to 600 m, with highest numbers between 250 and 450 m. Larvae less than or equal to 2.5 mm in length were found from the surface to 620 m with the majority below 400 m; larvae of 2.6-5.0 mm length were taken most frequently in upper 100 m and at 5.1-7.5 mm the majority were above 40 m depth. To the west of the British Isles, during March and April when there was no thermal stratification, eggs of mackerel were taken down to 590 m, with the majority from the surface to 200 m. During May and June, when the seasonal thermocline had developed, eggs were taken mostly in the upper 120 m, above the thermocline. In the North Sea more than 91% of mackerel eggs occurred above a thermocline at 26 m. The majority of mackerel larvae to the west of the British Isles were taken in the upper 50 m, and above the thermocline when present; in the North Sea more than 91% of the larvae were taken above the thermocline and highest numbers were recorded at a depth of 6-8 m.
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