| 摘要 |
The populations of crustacea, algae and bacteria are maintained at a stage of dynamic reproduction and growth and the crustacea produced are harvested batchwise or continuously by filtering machines, the amount caught and the sizes harvested being adapted to the stage of development of the plankton populations. Organic substances in solution or in suspension, which can be assimilated by the planktonic crustacea, are absorbed wholly or partially on mineral particles taken in by the crustacea. The plankton is used as it is or as a composite food for feeding and rearing fish, or for feeding poultry or livestock. |
