CN114766400A - Moving floating deepwater staged culturing method for nacre - Google Patents
Moving floating deepwater staged culturing method for nacre Download PDFInfo
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- CN114766400A CN114766400A CN202210353982.7A CN202210353982A CN114766400A CN 114766400 A CN114766400 A CN 114766400A CN 202210353982 A CN202210353982 A CN 202210353982A CN 114766400 A CN114766400 A CN 114766400A
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- 238000000034 method Methods 0.000 title claims abstract description 8
- 238000012258 culturing Methods 0.000 title claims description 27
- 241001212699 Pinctada martensii Species 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 claims abstract description 18
- 238000009395 breeding Methods 0.000 claims abstract description 11
- 235000015170 shellfish Nutrition 0.000 claims description 26
- 241000490567 Pinctada Species 0.000 claims description 13
- 238000004140 cleaning Methods 0.000 claims description 11
- 238000007796 conventional method Methods 0.000 claims description 9
- 238000012136 culture method Methods 0.000 claims description 8
- 241000219503 Casuarina equisetifolia Species 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 2
- 230000004083 survival effect Effects 0.000 abstract description 12
- 230000001488 breeding effect Effects 0.000 abstract 4
- 239000011049 pearl Substances 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 239000013535 sea water Substances 0.000 description 3
- PFTAWBLQPZVEMU-DZGCQCFKSA-N (+)-catechin Chemical compound C1([C@H]2OC3=CC(O)=CC(O)=C3C[C@@H]2O)=CC=C(O)C(O)=C1 PFTAWBLQPZVEMU-DZGCQCFKSA-N 0.000 description 2
- 241000195493 Cryptophyta Species 0.000 description 2
- 241000893038 Hemiptelea Species 0.000 description 2
- 241000237502 Ostreidae Species 0.000 description 2
- 241001490476 Pinctada maxima Species 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000000366 juvenile effect Effects 0.000 description 2
- 235000020636 oyster Nutrition 0.000 description 2
- 244000089265 zong er cha Species 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 241001474374 Blennius Species 0.000 description 1
- 241000195628 Chlorophyta Species 0.000 description 1
- 241000238557 Decapoda Species 0.000 description 1
- 241000692870 Inachis io Species 0.000 description 1
- 241000565675 Oncomelania Species 0.000 description 1
- 241000737257 Pteris <genus> Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 241000934878 Sterculia Species 0.000 description 1
- 235000021282 Sterculia Nutrition 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010984 cultured pearl Substances 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009313 farming Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229940059107 sterculia Drugs 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/54—Culture of aquatic animals of shellfish of bivalves, e.g. oysters or mussels
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K61/00—Culture of aquatic animals
- A01K61/50—Culture of aquatic animals of shellfish
- A01K61/51—Culture of aquatic animals of shellfish of gastropods, e.g. abalones or turban snails
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Zoology (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
Abstract
The invention discloses a moving floating raft deepwater staged breeding method for pinctada martensii, which belongs to the technical field of pinctada martensii breeding and comprises the steps of moving floating raft manufacturing, breeding mesh bag manufacturing, double-layer mesh bag hanging breeding management on pinctada martensii (seedlings, young pinctada martensii, small pinctada martensii and medium pinctada martensii), moving to a conical cage for breeding when the shell height of the pinctada martensii is more than 70mm, and the like; the method is suitable for the staged deep-water sea area artificial culture of the young pinctada martensii, the small pinctada martensii and the medium pinctada martensii, can provide a stable growth environment for the young pinctada martensii to the medium-sized sea area during culture, improves the survival rate and the growth speed, is easy to popularize and apply in production units and farmers, and has good social benefit, economic benefit and ecological benefit.
Description
Technical Field
The invention belongs to the technical field of nacre culture, and relates to a moving floating deepwater staged nacre culture method.
Background
Pinctada maxima is also called Pinctada maxima, belongs to Pinctada of Pinctada, and is the only pearl shellfish capable of culturing black Nanyang pearl. The nacre has various shell color varieties and strains, and can produce black series pearls such as silver gray, grey white, grey black, light gray, peacock green, purplish red, dark black and the like. The French Borisia of the south Pacific ocean is the largest base for producing the black pearls, the culture areas are mainly distributed in social (Society) archipelago, Gambier (Gambier) archipelago and Tuamotu archiu archipelago, and the cultured black pearls account for more than 95 percent of the total value of the black pearls in the world. The problem of low sea area culture survival rate of the seedlings still exists in the pearl oyster culture in China, the survival rate of the pearl oyster seedlings cultured in the sea area until the survival rate of the adult oyster is lower than 5 percent, wherein the high death rate mainly occurs in two stages of culturing the seedlings to the height of 25-35mm from the sea and culturing the mother oyster to the height of 50-60mm from the sea, so that the pearl oyster cannot be industrially cultured to produce black pearls in China.
The survival rate and the growth speed of the nacre fries in the period from the cultivation of the nacre fries to the sea area of adult nacre are influenced by environmental factors such as the specific gravity of seawater, the water temperature, the dissolved oxygen content, the abundance of floating algae and the like in the sea area of the cultivation. And is also influenced by the discharge of the runoff, the production and domestic wastewater and the discharge of the aquaculture wastewater of the fishes and prawns near the bank. At present, the sea area cultivation of the nacre is to load the artificially cultivated young seedlings with the shell height of 3-5mm into mesh bags and hang the young seedlings on floating raft or extension ropes for cultivation, and the mesh bags are cleaned once every 3-4 days for cultivation; according to the growth condition of the mother shellfish, the cages are divided and replaced once every 15 to 20 days, and the time interval between the cages is increased to once every 30 to 40 days as the growth of the mother shellfish and the increase of attachments. When the shells are separated, the shells need to be taken out from an old mesh bag or a mesh cage, and the shells are easy to be injured due to the fact that the nacre is firmly attached, the byssus is pulled and the attachments on the shells are removed, so that the survival rate is influenced. Secondly, the cultivation site is fixed at a position in the sea area, and the cultivated female shellfish is killed greatly under the adverse conditions such as continuous high temperature, red tide, heavy rain and strong wind and wave. Therefore, it is necessary to develop a new sea farming method to improve the survival rate and growth rate of nacre.
Disclosure of Invention
Aiming at the problem that the survival rate of the nacre seedlings is extremely low in the sea area culture period, the invention provides the moving floating deepwater staged nacre culture method, which can improve the culture survival rate of the nacre seedlings, the young nacres, the small nacres and the medium nacres in the sea area, has obvious economic, social and ecological benefits and is suitable for the culture of the nacre in the deep sea area.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a nacre moving floating deepwater staged breeding method comprises the following steps:
(1) preparing a movable floating raft: selecting a conventional pearl oyster cultivation floating raft, erecting a sunshade net with the shading rate of more than 80 percent, and dragging the cultivation floating raft to a cultivation sea area by a ship;
(2) manufacturing a culture mesh bag: manufacturing a box-shaped mesh bag with the length of 300-;
(3) culturing nacre: and (3) putting young seedlings, young shells, small shells and middle shells of the nacre into the mesh bags manufactured in the step (2), filling 10-15 pteris gigas with the weight of 5-10 g/each in each bag, hanging and culturing on the floating transverse roots, moving to an open-sea deepwater sea area which is far away from the shore, smooth in water flow, 15-20m in water depth, 24-30 ℃ in water temperature, 2-4m in transparency and 1.021-1.024g/cm3 in relative density, and culturing and managing the nacre according to a conventional method for culturing the nacre.
Preferably, the movable floating raft in the step (1) is a floating raft for cultivating pearl oyster bundled by casuarina equisetifolia strips.
Preferably, the height of the shell of the young nacre in the step (3) is 4-8mm, the mesh of the mesh bag is 2-3mm, the cultivation density is 200-.
Preferably, the shell height of the young shellfishes in the step (3) is 8-20mm, 4.5-15mm mesh bags are replaced, the culture density is 100-.
Preferably, the height of the seashell in the step (3) is 20-40mm, a mesh bag with the mesh of 15-25mm is replaced, the culture density is 50-100 per bag, the cage is cleaned for 1 time every 4-6 days, and the outer mesh bag is separated and replaced for 1 time every 20-30 days.
Preferably, the height of the middle shell in the step (3) is 40-70mm, mesh bags with meshes of 25-30mm are replaced, the culture density is 30-50 per bag, the cleaning is carried out for 1 time every 7-10 days, and the bag is divided into bags per cage for 1 time every 30-40 days.
Preferably, the bag dividing is to transfer the required mesh cloth of the young shellfish, the small shellfish and the medium shellfish which are attached to the inner mesh bag into a new mesh bag according to the attachment condition.
Preferably, the mother shell in the step (3) is transferred to a conical cage for cultivation according to a conventional method of pearl oyster when the size of the mother shell is more than 70 mm.
Compared with the prior art, the invention has the following beneficial effects:
the floating raft is cultured by using the pearl shells, the sunshade net is installed, and the floating raft is towed to a sea area by a ship for culture, so that the floating raft can be transported to a suitable sea area for culture when the sea area environment is poor, and the negative influence of environmental factors is avoided. The like Leizhou peninsula is affected by strong southwest wind in 6-7 months, the water body is turbid, a large quantity of cultured pearl shells die, and at the moment, the floating raft is moved to an east sea area or a sea area with a dam or a protruded mountain ridge for shielding southwest wind for culture; and as another example, the mobile raft is dragged to a wind shelter in a typhoon season to avoid the influence of typhoon. Secondly, a certain amount of hemiptectinathus chinensis is cultured in the culture mesh bag in a matching way, and by utilizing the feeding properties of algae, seaweed and organic debris of the hemiptectinathus chinensis, the hemiptectinathus chinensis can eat attachments such as diatom, green algae and organic debris attached to the culture mesh bag, so that the attachments are reduced, the culture mesh bag is kept clean, water flow is smooth, and the feeding and sufficient oxygen obtaining of the pinctada martensii are facilitated. Thirdly, the double-layer mesh bag is adopted, when the attachments need to be cleaned, only the outer layer mesh bag needs to be replaced without taking out the cultured pinctada martensii from the old cage, and if the outer layer mesh bag needs to be replaced, the required mesh cloth is cut by the sub-cages to move the young pinctada martensii, the small pinctada martensii and the medium pinctada martensii which are attached to the inner layer mesh bag to a new mesh bag/cage according to the attachment condition, so that the relatively stability of the culture environment is kept, and the mechanical damage of shellfish cleaning to the pinctada martensii is reduced.
According to the staged deep sea culture of the nacre, the moving raft culture is adopted at the high mortality stage during the culture period of the nacre in the sea area to bridge the death peak (the stages with the shell height of 25-35mm and 50-60 mm) of the nacre, and the nacre after the death peak is bridged is transferred to a conical cage for culture according to the conventional method. Therefore, the invention solves the problem of low survival rate of the nacre in the sea area and avoids the high expense of whole-course mobile floating cultivation.
Detailed Description
The present invention is further illustrated in detail by the following examples, which are provided only for illustrating the present invention and are not intended to limit the scope of the present invention.
Example 1
A nacre moving floating raft deepwater staged breeding method comprises the following steps:
(1) manufacturing a movable floating mat: selecting a conventional floating raft bundled by casuarina equisetifolia strips for pearl oyster cultivation, erecting a sunshade net with the shading rate of more than 80%, and dragging the sunshade net to a cultivation sea area by a ship;
(2) manufacturing a cultivation mesh bag: making a box-shaped mesh bag with the length of 300mm, the width of 300mm and the height of 150mm, wherein the mesh of the mesh bag is smaller than the height of the young shellfish, the small shellfish and the medium shellfish to prevent the parent shellfish from falling off, and the two mesh bags are sleeved together for use.
(3) Culturing nacre: filling nacre seedlings with the shell height of 4mm into mesh 2mm mesh bags manufactured in the step (2), culturing at a density of 350/bag, filling 15 hemiptelea gigas with the weight of 5 g/bag in each bag, hanging and culturing on the floating transverse roots, moving to a position far away from the bank, ensuring smooth water flow, a water depth of 15m, a seawater temperature of 24 ℃, a transparency of 2m and a relative density of 1.021g/cm3The open sea area is cultured; cleaning for 1 time every 2 days, and dividing bags and replacing outer layer mesh bags for 1 time every 10 days;
the height of the young shell is 8mm, the mesh of the mesh bag is 4.5mm, the cultivation density is 200 per bag, the cleaning is carried out for 1 time every 3 days, and the bag is divided and the outer mesh bag is replaced for 1 time every 15 days;
the height of the young shell is 15mm, the mesh of the mesh bag is 8mm, the cultivation density is 150 per bag, the young shell is cleaned for 1 time every 4 days, and the bag is divided and the outer mesh bag is replaced for 1 time every 15 days;
the height of the small shell is up to 30mm, the mesh of the mesh bag is 20mm, the culture density is 80 per bag, the small shell is cleaned for 1 time every 5 days, and the outer mesh bag is divided and replaced for 1 time every 20 days;
the medium shell is 50mm high, the mesh of the mesh bag is 25mm, the culture density is 45 per bag, the medium shell is cleaned 1 time every 5 days, the medium shell is bagged 1 time every 30 days, the mother shell is moved to a conical cage when the size of the mother shell is more than 70mm, and the pearl shell is cultured according to the conventional method of pearl shell.
Example 2
A nacre moving floating raft deepwater staged breeding method comprises the following steps:
(1) manufacturing a movable floating mat: selecting a conventional floating raft bundled by casuarina equisetifolia strips for cultivating pearl shells, erecting a sunshade net with the shading rate of more than 80%, and dragging the floating raft to a cultivation sea area by a ship;
(2) manufacturing a cultivation net cage: the box-shaped mesh bag with the length of 330mm, the width of 330mm and the height of 160mm is manufactured, the mesh of the mesh bag is smaller than the height of the young shellfish, the small shellfish and the middle shell so as to prevent the mother shellfish from falling off, and the two mesh bags are sleeved together for use.
(3) Culturing nacre: putting the nacre seedlings with the shell height of 6mm into mesh 2.5mm mesh bags manufactured in the step (2), culturing at a density of 300 per bag, filling 14 hemiptelea gigas with a weight of 7 g per bag, hanging and culturing on the floating transverse roots, moving to a position far away from the bank, ensuring smooth water flow, a water depth of 17m, a seawater temperature of 25 ℃, a transparency of 3m and a relative density of 1.022/cm3The open sea area is cultured; cleaning for 1 time every 3 days, and bagging and replacing the outer mesh bag for 1 time every 12 days;
the height of the young shell is 10mm, the mesh of the mesh bag is 5mm, the cultivation density is 140 per bag, the young shell is cleaned for 1 time every 4 days, and the young shell is divided into bags every 17 days and the outer mesh bag is replaced for 1 time;
the height of the small shell is 20mm, the mesh of the mesh bag is 10mm, the cultivation density is 100 per bag, the cleaning is carried out for 1 time every 5 days, and the bag is divided and the outer mesh bag is replaced for 1 time every 25 days;
the medium shell is up to 40mm, the mesh of the mesh bag is 25mm, the culture density is 50 per bag, the medium shell is cleaned 1 time every 8 days, the medium shell is bagged 1 time every 30 days, the mother shell is moved to a conical cage when the size of the mother shell is up to more than 70mm, and the pearl shell is cultured according to the conventional method of pearl shell.
Example 3
A nacre moving floating raft deepwater staged breeding method comprises the following steps:
(1) manufacturing a movable floating mat: selecting a conventional floating raft bundled by casuarina equisetifolia strips for cultivating pearl shells, erecting a sunshade net with the shading rate of more than 80%, and dragging the floating raft to a cultivation sea area by a ship;
(2) manufacturing a culture mesh bag: manufacturing a box-shaped mesh bag with the length of 340mm, the width of 340mm and the height of 170mm, wherein the mesh of the mesh bag is smaller than the height of the young shellfish, the small shellfish and the medium shell so as to prevent the mother shellfish from falling off, and the two mesh bags are sleeved together for use;
(3) culturing nacre: putting the Pinctada martensii seedlings with the shell height of 7mm into the mesh bag manufactured in the step (2), wherein the mesh of the mesh bag is 3mm, the cultivation density is 250/bag, each bag is filled with 12 hemipteris gigas with the weight of 8 g/bag, the Pinctada martensii is hung on the transverse roots of the floating raft and moved away from the bank, the water flow is smooth, the water depth is 18m, the water temperature is 28 ℃, the transparency is 4m, and the relative density is 1.023g/cm3The open sea area is cultured; cleaning for 1 time every 3 days, and separating bags and replacing outer layer mesh bags for 1 time every 14 days;
the height of the juvenile shell is up to 15mm, the mesh of the mesh bag is 8mm, the cultivation density is 120 per bag, the juvenile shell is cleaned 1 time every 4 days, and the outer mesh bag is separated and replaced 1 time every 18 days;
the height of the small shell is 25mm, the mesh of the mesh bag is 15mm, the culture density is 80 per bag, the small shell is cleaned for 1 time every 5 days, and the outer mesh bag is divided and replaced for 1 time every 25 days;
the medium shell is 45mm high, the mesh of the mesh bag is 25mm, the culture density is 40 per bag, the cleaning is carried out for 1 time every 8 days, the bag (cage) is divided for 1 time every 35 days, the mother shell is moved to a conical cage when the height is more than 70mm, and the pearl oyster is cultured according to the conventional method.
Example 4
A nacre moving floating raft deepwater staged breeding method comprises the following steps:
(1) manufacturing a movable floating mat: selecting a conventional floating raft bundled by casuarina equisetifolia strips for cultivating pearl shells, erecting a sunshade net with the shading rate of more than 80%, and dragging the floating raft to a cultivation sea area by a ship;
(2) manufacturing a culture mesh bag: manufacturing a box-shaped mesh bag with the length of 350mm, the width of 350mm and the height of 180mm, wherein the mesh of the mesh bag is smaller than the height of the young shellfish, the small shellfish and the medium shellfish to prevent the parent shellfish from falling off, and the two mesh bags are sleeved together for use;
(3) culturing nacre: putting the nacre seedlings with the shell height of 8mm into the mesh bags manufactured in the step (2), wherein the mesh of the mesh bags is 3mm, the cultivation density is 200 per bag, and each bag is filled with 10 g/each of the oncomelania hupensis10, the floating seedlings are hung on the horizontal roots of the floating raft and moved to a position far away from the bank, the water flow is smooth, the water depth is 20m, the water temperature is 30 ℃, the transparency is 4m, and the relative density is 1.024g/cm3The open sea area is cultured; cleaning for 1 time every 3 days, and bagging and replacing the outer mesh bag for 1 time every 15 days;
the height of the young shell is 20mm, the mesh of the mesh bag is 10mm, the cultivation density is 100 per bag, the young shell is cleaned for 1 time every 4 days, and the bag is divided and the outer mesh bag is replaced for 1 time every 20 days;
the height of the small shell is 30mm, the mesh of the mesh bag is 20mm, the culture density is 50 per bag, the small shell is cleaned for 1 time every 6 days, and the outer mesh bag is divided and replaced for 1 time every 30 days;
the medium shell is up to 40mm, the mesh of the mesh bag is 25mm, the culture density is 30 per bag, the cleaning is carried out for 1 time every 10 days, the bag (cage) is divided for 1 time every 40 days, the mother shell is moved to a conical cage when the height of the mother shell is up to more than 70mm, and the pearl shell is cultured according to the conventional method of the pearl shell.
Comparative example 1
Selecting a nacre seedling with a shell height of 4-6mm, hanging and culturing in a superior sea area for culturing nacre shellfish with smooth water flow, abundant bait organisms and high dissolved oxygen content, and culturing in the foreign sea of Sterculia subulosa county in Zhan city according to a conventional method.
The survival rate and growth rate of the cultured nacre of examples 1-4 and comparative example 1 were compared, and the results are shown in table 1.
TABLE 1 comparison of the culturing effects of different culturing modes of nacre
As can be seen from Table 1, compared with the conventional sea area culture method, the survival rate of the mother-shell of the young nacre, the small nacre and the middle nacre cultured in the moving and floating deepwater stage by adopting the method is obviously improved, and the growth speed is higher.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. A nacre moving floating raft deepwater staged breeding method is characterized by comprising the following steps:
(1) preparing a movable floating raft: selecting a conventional pearl shell cultivation floating raft, erecting a sunshade net with the shading rate of more than 80%, and dragging the cultivation floating raft to a cultivation sea area by using a ship;
(2) manufacturing a cultivation mesh bag: manufacturing a box-shaped mesh bag with the length of 300-350mm, the width of 300-350mm and the height of 150-180mm, wherein the mesh of the mesh bag is smaller than the height of the young seedling, the young shellfish, the small shellfish and the middle shell, and sleeving the two mesh bags together for use;
(3) culturing nacre: filling young pinctada martensii, small pinctada martensii and medium pinctada martensii into the mesh bags manufactured in the step (2), filling 10-15 pinctada martensii with the weight of 5-10 g/bag, hanging and culturing on the transverse roots of the culture floating row, moving to a position far away from the bank, ensuring smooth water flow, the water depth of 15-20m, the water temperature of 24-30 ℃, the transparency of 2-4m and the relative density of 1.021-1.024g/cm3The cultivation management of the nacre is carried out according to the conventional method for cultivating the nacre.
2. The deep-water staged culturing method for the movable floating raft of the nacres as claimed in claim 1, wherein the movable floating raft in the step (1) is a floating raft for culturing the nacres, which is formed by bundling casuarina equisetifolia strips.
3. The method for culturing the nacre in the deepwater stage by moving and floating the nacre as claimed in claim 1, wherein the height of the nacre seedling shell in the step (3) is 4-8mm, the mesh of the mesh bag is 2-3mm, the culturing density is 200 and 350 pieces per bag, the nacre seedling shell is cleaned 1 time every 2-3 days, and the bag separation and the outer mesh bag replacement are carried out 1 time every 10-15 days.
4. The method for moving, floating and deepwater staged culture of nacre as claimed in claim 1, wherein the height of the shell of the young nacre in step (3) is 8-20mm, the mesh bag with 4.5-15mm is replaced, the culture density is 200 bags per bag, the cleaning is performed 1 time every 3-4 days, and the bag is divided and the outer mesh bag is replaced 1 time every 15-20 days.
5. The moving, floating and deepwater staged pearl oyster culture method according to claim 1, wherein the height of the small shells in the step (3) is 20-40mm, the mesh bags with meshes of 15-25mm are replaced, the culture density is 50-100 per bag, the cages are cleaned 1 time every 4-6 days, and the bags are separated and the outer mesh bags are replaced 1 time every 20-30 days.
6. The method for cultivating nacre in the deepwater stage by moving and floating the nacre as claimed in claim 1, wherein the height of the middle shell in the step (3) is 40-70mm, the mesh bag with 25-30mm is replaced, the cultivation density is 30-50 per bag, the nacre is cleaned 1 time every 7-10 days, and the nacre is divided into bags per cage 1 time every 30-40 days.
7. The deep-water staged moving raft culture method for pinctada martensii according to any one of claims 3 to 6, wherein the bag separation is to cut off required meshes of young pinctada martensii, small pinctada martensii and medium pinctada martensii which are attached to the inner mesh bag according to the attachment conditions and move the required meshes to a new mesh bag.
8. The moving, floating and deepwater staged pearl oyster culture method according to claim 1, wherein the mother shells in the step (3) are moved into a conical cage for culture according to a conventional pearl oyster culture method when the size of the mother shells is more than 70 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100251968A1 (en) * | 2009-03-31 | 2010-10-07 | Acosta-Salmon Hector | Methods for Producing Cultured Pearls in Conch and Other Gastropods |
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