Journal of the Marine Biological Association of the United Kingdom

Research Article

The effect of algal and artificial diets on the growth and fatty acid composition of Crassostrea gigas Spat

C. J. Langdona1 p1 and M. J. Waldocka2 p2

a1 M.A.F.F. Fisheries Experiment Station, Conwy, Gwynedd

a2 N.E.R.C. Unit of Marine Invertebrate Biology, Marine Science Laboratories, Menai Bridge, Gwynedd

Crassostrea gigas spat were fed diets of Pavlova lutheri, Dunaliella tertiolecta or Tetraselmis suecica. The D. tertiolecta diet contained no fatty acid longer or more unsaturated than linolenic acid (18:3ω3) and the T. suecica diet was deficient in decosahexaenoic acid (22:6ω3). The algal diets were supplemented with micro-encapsulated triolein, oyster lipid extract or 22:6ω3. Spat were also starved or fed carbohydrate diets.

Correspondence:

p1 Present address: Mariculture Centre, College of Marine Studies, University of Delaware, Lewes, U.S.A.

p2 Present address: M.A.F.F., Fisheries Laboratory, Burnham-on-Crouch, Essex, CMo 8HA.