H. Yasunobu, H. Nagayama, K. Nakamura, K. Hatai-1997
Nippon Suisan Gakkaishi, 63: 56-63, in Rotifer News, 30 (Dec '97)
Experimental infections using zoea-I demonstrated that the infection with H. okinawaensis was controlled by keeping the pH of rearing water at 9.25. Acute toxicities of pH 9.25 to swimming crab zoea, rotifer Brachionus plicatilis rotundiformis, brine shrimp Artemia salina, and unicellular alga Nannochloropsis sp. were not observed. Survival rates of swimming crab larvae from zoea-I to juvenile crab-I in the center were apparently raised by applying this pH adjustment at 9.25.
(Hyogo Prefectural Fisheries Expt. Stn., Akashi, Hyogo 674, Japan)