repandum with antibiotics, germanium dioxide, and scrubbing did not significantly reduce settlement of H.
The treatment comprised (1) 30 sec of vigorous scrubbing with a nylon brush under running 1-[micro]m-filtered ultraviolet-treated seawater followed by (2) soaking in a cocktail of antibiotics and germanium dioxide for 3 days, and finally (3) a repeat of the scrubbing treatment immediately prior to bioassay.
repandum with antibiotics, germanium dioxide, and scrubbing failed to reduce settlement of H.
repandum with scrubbing, antibiotics, and germanium dioxide had no effect on the alga's settlement-inducing activity.
When the densities of diatoms on algal surfaces were altered by soaking the algal fragments in a germanium dioxide solution ora modified Jorgensen medium, neither treatment (increased or reduced diatom densities) affected the larval settlement percentage on M.
Inhibiting diatom growth treatment: ACA fragments were held in an aerated 2.5 mg/L germanium dioxide solution for 3 wk.
Germanium dioxide significantly reduced the diatom density (3,000 [+ or -] 2,000 cells / [cm.sup.2]) on the ACA fragments compared with densities before the soaking process (17,000 [+ or -] 2,000 cells/[cm.sup.2]; P < 0.05).