Marine fish culture in Britain IX. Growth of cultured plaice to marketable size in the laboratory

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Abstract
Plaice (Pleuronectes platessa) were reared in unheated sea water in the laboratory through two generations. Selected second generation plaice were measured and weighed every two months. One group of fish cultured at a density of 13 fish per m2 of tank area gave a yield of 11·6 kg of marketable plaice 21 months from hatching for a food consumption of 56 kg. Plaice cultured in laboratory tanks grew faster than wild plaice in the sea and were heavier for their length. Seasonal variations in growth of cultured plaice were similar to those shown by wild plaice in the sea.