228 THE ESSEX NATURALIST The Shrimping Industry in Essex* M. N. MISTAKIDIS (Fisheries Laboratory, Burnham-on-Crouch, Essex) THE Thames Estuary is known widely for its shrimp fishery. Crabs and lobsters are found only in small numbers, since these species prefer a rugged coast and rough sea-bottom during their life, especially during the earlier part, and also after moulting. The shrimps fished in the Thames area are of two kinds, the "brown" (Crangon vulgaris L.) and the "pink" or "red" (Pandalus montagui Leach). The pink shrimp is more allied to the true prawn (Palaemon (= Leander) serratus), and perhaps it is this similarity that it is known in other parts of the country as "Fleetwood prawn", "sprawn" or "Aesops prawn". The true prawn and the allied species (Palaemon squilla) are irregularly distributed in the Thames Estuary, but occasionally they are found amongst pink shrimp catches. Shrimps, brown and pink, are found all around the English and Welsh coastline, but their densities vary considerably from area to area. The three main centres of the shrimp fishery are the Wash, the Thames Estuary, and the Lancashire coast. Land- ings of pink and brown shrimps at ports on the above-mentioned areas amount approximately to 80 per cent of total landings. The total landings of shrimps for England and Wales during the past 48 years show that they fluctuate between 17,500 and 73,000 cwts. (Fig. 1). As far as landings are concerned the Thames Estuary is second in importance, the Wash being first. Certain distinct falls in landings may have been due to the reduced effort 1910 1915 1920 1925 1930 1935 1940 1945 1950 1955 Figure 1.—Landings of pink and brown shrimps in England and Wales for the years 1910 to 1958. *Paper given for the Essex Field Club, at West Ham Technical College, 17th January, 1959.