A novel method of eliminating copepods on attached diatoms collection plates during the artificial mass production of juvenile abalones
2008
Nakamuta, H.(Saga-ken. Genkai Fisheries Research and Development Center, Karatsu (Japan))
A major problem encountered during the artificial mass production of juvenile abalones by using attached diatoms collection plates is the feeding of attached diatoms by parasitic copepods. Therefore, we investigated a suitable method to eliminate parasitic copepods from attached diatoms collection plates by attempting to promote the proliferation of attached diatoms by soaking the plates in carbon dioxide (CO2)-enriched seawater. In addition, we investigated the influence of soaking in CO2-enriched seawater on parasitic copepods and juvenile abalones. Soaking in CO2-enriched seawater affected parasitic copepods earlier than juvenile abalones. Furthermore, we could efficiently eliminate parasitic copepods from attached diatoms collection plates by washing the plates with seawater immediately after soaking in CO2-enriched seawater.
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