Cephalopod rearing method, cephalopod rearing apparatus, protozoa prevention method, and protozoa extermination method
AssigneeNissui Corporation
InventorsIppei Arimoto, Kentaro Fujii, Kagayaki Morishima
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Abstract
Provided herein is a method for breeding cephalopod larvae in a rearing tank having a water changing means. The method includes a water-changing period during which the ratio of water changed by the water-changing means per day is 200% or more relative to the quantity of water in the rearing tank in a floating breeding period of the cephalopod larvae.
Claims25
A cephalopod rearing method comprising rearing cephalopod larvae in a rearing tank comprising a water exchange mechanism,
- wherein the cephalopod larvae are common octopus larvae, and
- wherein a planktonic paralarval stage for the cephalopod larvae includes (i) a high water exchange rate period in which a water exchange rate relative to an amount of water in the rearing tank per day by a water exchange mechanism is 200% or more, and (ii) an adjustment period before the high water exchange rate period, in which the water exchange rate relative to the amount of water in the rearing tank per day by the water exchange mechanism is 90% or less.
A method of preventing protozoa occurrence in a rearing tank with cephalopod larvae, comprising rearing cephalopod larvae in the rearing tank having a water exchange mechanism,
- wherein the cephalopod larvae are common octopus larvae, and
- wherein a planktonic paralarval stage for the cephalopod larvae includes (i) a high water exchange rate period in which a water exchange rate relative to an amount of water in the rearing tank per day by the water exchange mechanism is 200% or more, and (ii) an adjustment period before the high water exchange rate period, in which the water exchange rate relative to the amount of water in the rearing tank per day by the water exchange mechanism is 90% or less,
- thereby preventing protozoa occurrence in the rearing tank.
A method of exterminating a protozoa in a rearing tank with cephalopod larvae, comprising rearing cephalopod larvae in the rearing tank having a water exchange mechanism,
- wherein the cephalopod larvae are common octopus larvae, and
- wherein a planktonic paralarval stage for the cephalopod larvae includes (i) a high water exchange rate period in which a water exchange rate relative to an amount of water in the rearing tank per day by the water exchange mechanism is 200% or more, and (ii) an adjustment period before the high water exchange rate period, in which the water exchange rate relative to the amount of water in the rearing tank per day by the water exchange mechanism is 90% or less,
- thereby exterminating the protozoa in the rearing tank.
Dependencies are inferred from the claim text.