Abstract
1. 1. The concentration of copper in the blood of Crangon vulgaris collected in the autumn 1967 from East Anglesey and West Anglesey ranged from 41 to 159 μg/ml respectively. Individual variation in blood copper concentration could not be correlated with sex or size. 2. 2. A significant correlation was found betwee blood copper concentration a moult stage; highest values were found in the late premoult (D 2/D 3) animals and lowest values found in postmoult (A-B) animals 3. 3. Hepatopancreas (Cu) varied from 13 to 480 μg/g dry wt. for animals collected in the autumn from East Anglesey and 118 to 2900 μg/g dry wt. for West Anglesey. 4. 4. Histochemical studies revealed copper located in vacuoles within cells of the hepatopancrease of all animals examined. Wide variation was found in the sizes of these bodies, their numbers and the number of cells containing them. 5. 5. The copper content of the blood of shrimps maintained in copper-enriched sea water did not increase whereas the hepatopancreas accumulated copper. 6. 6. All the detectable copper eluted from agar electropherograms of blood was carried by haemocyanin. An estimate of approximately 0·2 per cent was found for the copper/protein ratio of unpurified Crangon haemocyanin.
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