The cell yields of batch and semicontinuous cultures in f/2 medium of
the marine diatom Chaetoceros sp., widely used in Mexican mariculture,
may be improved by more than 30% by the addition of 10 mg l(-1) of ex
perimental zeolitic products to the medium. Over 3 days, the best yiel
ds are obtained with ZESTEC 56 and ZESEP 56, but ZEBEN 06 gives better
results after 5 days, or in semicontinuous cultures. (C) 1997 Elsevie
r Science B.V.