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| | Chapter VI - 3 |
 | | The infestation of Baltic cod with conspicuous externally visible parasites, the copepod Lernaeocera branchialis in the gill chamber and encysted metacercariae of the digenean Cryptocotyle lingua in the skin, is restricted to the southwestern parts of the Baltic Sea (see REF : 34,378). |
 | | The diseases and parasites of Baltic herring, that have been the subject of most scientific activities during the past twenty years, are the infestation by larvae of the parasitic nematode Anisakis sp. |
 | | Mean prevalences in herring in the size range 20-27 cm total length, sampled west of Bornholm (ICES Sub-divisions 22 and 24) in December 1987 and 1988, were in the range of 30-45 %, whereas prevalences in areas east of Bornholm (ICES Sub-divisions 25 and 26) were between 0.3 and 0.7 % (see REF : 385). |
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