Seaweeds were reared
in a biofiltration unit with fishpond waste water effluents. The three algal species were found to contain high protein contents
which would be related to its production under the high nitrogen culture conditions of the biofilter system. Protein and
carbohydrate contents were highest in H. musciformis and lowest in G. cornea. Survival rates of juvenile abalone were very
good, regardless of the algae fed. Feed intake of H. spinella was highest, followed by H. musciformis. Growth rates of abalone
were within the range obtained under commercial conditions, final shell length and weight being significantly highest in animals
fed H. spinella and lowest in those fed G. cornea.