Rearing Method of Cephalopods, Prevention Method of Protozoa, Extermination Method of Protozoa and Cephalopod Larva
AssigneeNissui Corporation
InventorsKentaro Fujii, Kagayaki Morishima, Ippei Arimoto
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Abstract
A cephalopod breeding method, which is for breeding cephalopod larvae in a breeding water tank, comprises, during the floating breeding period of the cephalopod larvae, forming a high concentration area where the salinity concentration is higher compared to seawater at the bottom of the breeding water tank and, after the passage of a predetermined time from the formation of the high concentration area, removing the high concentration area.
Claims68
A rearing method of cephalopods for breeding a cephalopod larva in a rearing tank, the method comprising:
- in a floating rearing period of the cephalopod larva,
- forming a high-concentration region at a bottom part of the rearing tank, the high-concentration region having a salt concentration higher than that of seawater;
- and
- removing the high-concentration region after a predetermined time has elapsed from the forming of the high-concentration region.
A rearing method of cephalopods for breeding a cephalopod larva in a rearing tank, wherein in the floating rearing period of the cephalopod larva, a protozoan density in water in the rearing tank is controlled to be 350 individuals/mL or less.
A prevention method of protozoa for preventing a protozoan from developing in a rearing tank in breeding a cephalopod larva in the rearing tank, the method comprising:
- in a floating rearing period of the cephalopod larva,
- forming a high-concentration region at a bottom part of the rearing tank, the high-concentration region having a salt concentration higher than that of seawater;
- and
- removing the high-concentration region after a predetermined time has elapsed from the forming of the high-concentration region.
A method of reducing or eliminating live protozoa from an inside of a rearing tank in breeding a cephalopod larva in the rearing tank, the method comprising:
- in a floating rearing period of the cephalopod larva,
- forming a high-concentration region at a bottom part of the rearing tank, the high-concentration region having a salt concentration higher than that of seawater;
- and
- removing the high-concentration region after a predetermined time has elapsed from the forming of the high-concentration region.
A cephalopod larva bred in a rearing tank by a breeding method comprising:
- adding a cephalopod larva to the rearing tank,
- in a floating rearing period of the cephalopod larva:
- forming a high-concentration region at a bottom part of the rearing tank, the high-concentration region having a salt concentration higher than that of seawater;
- removing the high-concentration region after a predetermined time has elapsed from the forming of the high-concentration region;
- and
- obtaining cephalopod larvae bred in the rearing tank after 15 days.
Dependencies are inferred from the claim text.