50m3水槽を用いたシオミズツボワムシ耐久卵の量産〔英文〕

概要

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Two trials of mass production of L-type rotifer Brachionus plicatilis resting eggs were conducted in 50m3 tanks (40m3 in water volume). Culture temperature was regulated at 18-25°C and salinity at 10-16ppt. Two replicate tanks were used for each trial. The feeding amount in Trial I (fed with Nannochloropsis oculata diet alone) was 7.81kg (dry weight), while it was 32.53kg in Trial II (fed with N. oculata and baker's yeast).The average maximum rotifer density during the 10-day culture period was 151 and 425 individ./ mlin Trials I and II, respectively. The mixis rate was 27.9 (Trial I) and 40.1% (Trial II). No significant difference was found in fertilization rates between trials. The number of resting eggs produced per tank was 1.05×109 (Trial I) and 3.53×109 (Trial II). The number of resting eggs produced from 1g dry weight diet ranged from 87×103 to 149×103, and it did not vary among trials.
日本水産學會の論文