79 results about "Benthic diatom" patented technology

The invention relates to a method for realizing ecological larval culture on rapana venosa. The method is characterized by comprising the following steps of: firstly selecting a pond which is convenient in water exchange, takes lithoherm and stone bottom as a substrate and is in the size of 2-5Mu; then placing mature rapana venosa with the length of 7-10cm into the pond in the quantity of 100kg per Mu, mating and spawning after the rapana venosa eats ruditapes and mussel for 2-3 days, when enough oocysts are obtained, removing the rapana venosa away, incubating the oocysts for 20-22 days at the water temperature of 20-25 DEG C to obtain planktonic larva, growing the planktonic larva by eating the planktonic larva in the pond, starting to throwing polyethylene corrugated plate adherence ortile under the condition that the water temperature is 22-25 DEG C after 15-16 days, sticking benthic diatom and the planktonic larva onto the polyethylene corrugated plate or tile, transfigurating the planktonic larva of the rapana venosa into young spiral shell after 5-6 days, growing the transfigurated young spiral shell by eating the planktonic larva and benthic diatom on the corrugated plate, wherein the survival rate of the transfigurated young spiral shell on the corrugated plate can reach more than 50%, and feeding small low-value bivalve to the young spiral shell with the length morethan or equal to 3mm. By applying the method provided by the invention, the defects that the survival rate is low and the larval yield is low as bait conversion is difficult and water is polluted when carnivorous fish mice are used as feed in indoor artificial larval culture can be overcome, and the larval yield is improved by more than 50% compared with the indoor artificial larval culture. Meanwhile, the production cost is saved as no bait is thrown into the pond, thus the method is environment-friendly, and the produced larval is strong.

The invention provides a method for ecologically controlling artificial breeding of abalone and relates to the abalone. The method comprises the following steps of: pumping pollution-free sea water of a clean sea area; carrying out sand leach by a sand leach system; precipitating and sterilizing the sea water subjected to the sand leach; and then introducing the sea water to a breeding pond; beginning to culture benthic diatoms on an abalone adhering substance surface 2 months before collecting an abalone fry; inoculating the benthic diatoms initially; adding nutritive salt; keeping micro-aeration; controlling illumination intensity; dumping the pond every 7-10d; then adding treated fresh sea water and continuously culturing the benthic diatoms; scattering EM (Effective Microorganism) bacteria 1 week before collecting the abalone fry to promote the formation of a microorganism flora on the abalone adhering substance surface; regulating the illumination intensity according to water temperature and water quality condition in the phase of culturing a young abalone; and adding 2-5g of microbial ecological agent to a water body per cubic meter every 10-15d. The method for ecologically controlling the artificial breeding of the abalone can effectively lower the production cost of the artificial breeding of the abalone, reduce environmental pollution and improve the abalone survival rate.

The present invention belongs to the technical field of aquaculture, and relates to a large-scale artificial fingerling cultivation method of boleophthamus pectinirostris. The method comprises the following steps: site selecting, pond establishing, cleaning the pond for eliminating the harm, cultivating benthic diatom, selecting and putting the parent fish, cultivating the parent fish, spawning and hatching, fry rearing, fingerling cultivating, etc. The method of the invention has the advantages of scientific and reasonable property, easy actualization and excellent practicability. The method can realize large-scale artificial fingerling cultivation of large-standard boleophthamus pectinirostris. Furthermore the quality of cultivated fingerling is excellent. The survival rate of cultivated fingerling is high and the economic benefit is excellent.

The invention aims to provide a stichopus japonicus and abalone integrated-breeding method. In other words, both abalone and stichopus japonicus are put into abalone breeding cages and are bred in a shallow sea raft mode, and the stichopus japonicus and abalone integrated-breeding method is free of pollution and ecological and environmentally friendly. According to the method, the stichopus japonicus is bred in abalone breeding cages, the characteristic of deposition feeding habits of the stichopus japonicus is fully utilized, feces of the abalone in the breeding cages are removed, and the pollution of the organic matter in the feces of the abalone to the seabed is reduced. Meanwhile, the stichopus japonicus feeds organic detritus, benthic diatom and the like which are attached on the breeding cages so that the breeding environment can be cleaned, and flow inside and outside the breeding cages is smooth.

The invention discloses a nutrition formula used for promoting rapid growth of benthic naviculaceae. The nutrition formula is characterized in that the nutrition formula comprises macroelements, microelements and vitamins, wherein the macroelements comprise nitrogen, phosphorus and silicon, the microelements comprise iron, zinc, copper, manganese, molybdenum and cobalt, and the vitamins comprise vitamin B1, vitamin B12 and vitamin H. According to growth characteristics of requirements of the benthic naviculaceae to different nutritive salts, the formula can achieve an objective of promoting rapid growth of purebred benthic diatom cultures. The nutrition formula has reasonable nutrition collocation, and is capable of effectively promoting rapid division growth of the naviculaceae, promoting absorption and utilization of a variety of nutrients, accelerating metabolism of naviculaceae cells and improving the production quantity.

The invention belongs to the industry of aquaculture and particularly relates to a benthic diatom culture method used for culturing breeding feed. The method is characterized by comprising the following steps: inoculating navicula tenera obtained by separation and purification and nitzchia palea to a liquid F culture medium in certain cell density, putting a circulating pump in the liquid F culture medium, and performing intermittent circulation, namely performing circulation for 10 minutes at intervals of every 2 hours, wherein the formula of the improved F culture medium comprises 149.6mg ofNaNO3, 8.8mg of NaH2PO4, 3.9mg of FeC6H5O7.5H2O, 1mL of trace element solution mother liquor, 1mL of vitamin solution mother liquor, 1000mL of pure water, vitamin mother liquor, 100mg of vitamin B1,0.5mg of vitamin B12 and 500mL of pure water; culturing benthic diatom in a 5000mL conical flask; and normally boiling seawater by adopting the improved F culture medium, wherein the salinity is 31, the illumination intensity is 50mu mol E.m<-2>s<-1>, the illumination period is 16L:8D, and the temperature is 20 DEG C. The benthic diatom culture method is simple, convenient and fast in operation, low in cost and suitable for popularization and application.

The invention relates to an artificial optimized culture method for sea squirts, microalgae and stichopus japonicus. The artificial optimized culture method for sea squirts, microalgae and stichopus japonicus is a bio-remediation technology for realizing self-purification of a culture water body and a sustainable marine product culturing method by utilizing a biological mutual benefit mechanism of a seawater polyculture system. The bait microalgae are inoculated in culture seawater; and the stichopus japonicus and the sea squirts are put into the culture water body with increased microalgae biomass. The inorganic nutritive salt in the seawater is converted into the microalgae biomass through the bioconversion of the microalgae so as to provide abundant bait for cultured organisms and simultaneously increase the concentration of dissolved oxygen in the water body. The sea squirts filtrate a large amount of sea water to remove grains and excess microalgae in the water body and settle a large quantity of aqueous layer particulate organic matters into a substrate in the form of feces and false faces. The demersal stichopus japonicus with a detritus food habit ingest the organic debris, benthic diatoms and microorganisms in the substrate so as to improve a substrate environment and reduce water body pollution. The artificial optimized culture method for sea squirts, microalgae and stichopus japonicus utilizes the polyculture system to promote the culture proliferation of the stichopus japonicus, carry out the self-purification and remediation of the culture water body, and realize the sustainable development of stichopus japonicus culture industry.

The invention relates to a cultivating method of young snails in hemifusus tuba artificial young snail growing, and belongs to the technical field of aquaculture. The cultivating method comprises thespecific steps of starting to cultivate benthic diatom for the initially hatched young snails to ingest food in an outdoor cement pool the third day to the fifth day after hemifusus tuba parent snailsgrow oocysts, wherein adherance of the benthic diatom is white PVC plastic corrugated tiles; washing and disinfecting a young snail growing pool the second day to the third day before the young snails are hatched out of the oocysts, uniformly laying the adherance fully grown with the benthic diatom at the bottom of the young snail growing pool and loading the oocysts to a plastic frame to be putto the young snail growing pool to be hatched; sifting the size through a sifting frame the ninth day to the tenth day after the young snails are hatched, and pool dividing cultivation is conducted. The cultivating method is easy and convenient to operate, the technology is easy to grasp, requirements for the young snails who just come out of film to be opened for bait can be met, the mutual slaughter of the young snails can also be effectively lowered, the survival rate of young snail cultivation in hemifusus tuba artificial young snail growing is increased by a large margin, and the growth of the young snails is promoted.

The invention discloses a seedling device and method for preventing mass mortality of larval haliotis diversicolor. The seedling device comprises attachment plates, a breeding pool, filter sea water, nutritive salts and a shading net; the attachment plates are used for breeding and attaching benthic diatoms and the larval haliotis diversicolor; the breeding pool is used for breeding the larval haliotis diversicolor; the filter sea water is arranged in the breeding pool and used for inoculating the benthic diatoms which are attached to the attachment plates which are arranged in the filter sea water; the nutritive salts are arranged in the filter sea water so as to promote the growth of the benthic diatoms; the shading net covers the breeding pool so as to adjust the growth rate of the benthic diatoms which are attached to the attachment plates. The seedling device is simple in structure, the seedling method is easy to operate, the larval haliotis diversicolor can climb onto the new attachment plate automatically after feeding benthic diatoms of the original attachment plate and continue feeding benthic diatoms of the new attachment plate so as to feed sufficient benthic diatoms and grow rapidly, and accordingly the larval haliotis diversicolor mass mortality caused by shortage or aging of bait which is arranged on the original attachment plate is avoided in the process of seedling and the survival rate of the larval haliotis diversicolor is improved.