摘要:
The invention provides a method for producing a sufficiently large pearl in a short time without requiring a skilled person. Genes of mantle cells of a shellfish for forming a pearl layer are incorporated into genes of monads or ultramicro organisms that generate a viscous secretion, by which pearl generating organisms are prepared. By these pearl generating organisms, pearl constituents are formed from calcium ions or magnesium ions in seawater and carbonate ions. By the viscous secretion, the pearl constituents are made to adhere to and stack onto the outer peripheral surface of a core composed of a synthetic resin, shell, ceramic, wood, or metal, so that a pearl layer is formed up.
摘要:
The present invention relates to a method of control of the Zebra Mussel from infestation of:(a) waterworks by applying an effective amount of ozone to a fresh (raw) water system of the waterworks,(b) cooling system of power plants and industrial plants by applying an effective amount of ozone to the intake water of the system, and(c) industrial process water systems by supplying an effective amount of ozone to the intake water of the system.
摘要:
A preparation for activating hemocytes of bivalves for pearl production containing a mitogen as an effective component, and a method for producing pearl through nucleus insertion operation of a bivalve for pearl production which comprises treating a section of the mantle part of a donor to be inserted with a mitogen.By the treatment with the present preparation, hemocytes of the wound site due to the nucleus insertion operation are activated, tissue growth of the section of the mantle part of the donor is accelerated and a good pearl sac is formed around the nucleus. As a result, the number ejected nuclei is decreased and the pearl quality and production amount are enhanced.These effects are further enhanced by using a mitogen treated with an aluminum adjuvant or the like.
摘要:
Artificial substrates for use in open sea enhancing biomass and/or absorbing wave energy, improved by means of particular dispositions and devices concerning their number, mooring, flotation, and using buried anchors and inertia weights. The artificial substrates are associated with affixed sessile organisms such as algae and shellfish and implanted securely even in very rough seas. The fulfill economical requirements for the development of aquacultural farms, aquacultural breakwaters, algae fields and shellfish reefs.
摘要:
A system for the culture of mollusca especially oysters or for collecting mollusca larvae in a water stretch. This system is characterized by the presence of a source of gas under pressure, an inflatable and deflatable floatation device, a conduit connecting the gas source to the floatation device, a mechanism for the introduction of gas under pressure into the floatation device in order to inflate it and for the removal of gas from the floatation device in order to deflate it and fastenings associated with the floating device attaching the latter to a grid constituted of a three dimensional grid type arrangement of culture baskets or of a group of mollusca larvae collectors. The invention also relates to a method for the culture of mollusca, specially oysters in a water stretch, characterized by the following steps: (a) introducing mollusca strains in screen baskets thereby permitting the water to circulate freely through each basket; (b) disposing the baskets containing mollusca strings in a three dimensional grid type arrangement hereinafter called grid; (c) fixing an inflatable and deflatable gas floating device to the grid and varying the quantity of air into the floating device in such a way as to simply submerge the grid or allowing it to rest on the bottom of the water stretch.
摘要:
Microbiologically contaminated shellfish are rendered edible by depurating the tainted shellfish in ultraviolet light irradiated salt water. The inlet water is first irradiated with ultraviolet light from an ultraviolet light source immersed in the water. The ultraviolet treated inlet water is then circulated through a filter which is provided to remove solid impurities from the circulating salt water whose salt and oxygen contents, temperature and flow rates are carefully controlled. Before returning to the depurating tank the water is again passed through an ultraviolet light irradiation zone.
摘要:
A method and a device for collecting oyster broods utilizing a collecting grill with the following features: (a) a rectangular frame onto which are attached a series of parallel bars, (b) a series of ribs encircling each bar, spaced the length of one oyster apart, and which rise above the bars, a height slightly less than the height of the lime coating, which forms on the grill.A number of sections are formed by the intersection of the bars and ribs; each section is large enough for one oyster.The oysters attach to the lime coating on each space. When a sudden force is applied to the grill, the coating and the oysters detach from the collector, without the oysters coming into contact with each other.
摘要:
A method for rearing commercially desirable bivalve molluscs such as oysters, clams, mussels, and scallops under artificial conditions to any marketable size in substantially reduced time periods. Oyster spat (
摘要:
A system is described for holding dense population of filter-feeding organisms, such as free, or "cultchless" oysters and hardshell clams in a configuration opposed to currents of nutrient-laden sea water. The system consists of means that both channel currents, or water flows developed by pumping, gravity flow, or tidal forces and hold the populations in opposition to these currents. A distributing flow of water is achieved throughout the populations contained in the system so that individual members of the population may filter at optimum rates, with waste products of their filtering activities being removed by the current.The system is capable of taking tiny hatchery-derived seed and growing them to commercial maturity in a series of stages designed to optimize handling and feeding requirements at the various stages. At the stages where the organisms are approaching commercial maturity and require a greater current flow and more nutrients, the system is capable of developing an increased level of efficiency in regard to the utilization of resources of current flow and nutrients. At its most efficient level, the system contemplates harvest of a phytoplankton resource of any estuarial area at optimum sustainable levels.