Abstract
A 2-month period of oxygen deficiency occurred in parts of the southern Kattegat during the late summer of 1986, and was accompanied by commercial catches of Nephrops which included dead, moribund, and pale-coloured animals. Haemocyanin levels in live animals at this time were very low when compared with a representative population sampled off eastern Scotland. It is contended that the hypoxia affected the feeding activity of Nephrops and that the resulting starvation induced the low haemocyanin values. Such events have been observed elsewhere in laboratory studies. In some of the sampling areas, population haemocyanin levels recovered following the return to normoxic conditions after autumnal storms.
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