CN108575931B - Method for capturing juvenile Solen grandis in nursery pond - Google Patents
Method for capturing juvenile Solen grandis in nursery pond Download PDFInfo
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- CN108575931B CN108575931B CN201810414073.3A CN201810414073A CN108575931B CN 108575931 B CN108575931 B CN 108575931B CN 201810414073 A CN201810414073 A CN 201810414073A CN 108575931 B CN108575931 B CN 108575931B
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- 241000383405 Solen grandis Species 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000366 juvenile effect Effects 0.000 title claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000009395 breeding Methods 0.000 claims abstract description 15
- 230000001488 breeding effect Effects 0.000 claims abstract description 15
- 241000237852 Mollusca Species 0.000 claims abstract description 14
- 239000004576 sand Substances 0.000 claims description 8
- 230000001706 oxygenating effect Effects 0.000 claims description 4
- 235000015170 shellfish Nutrition 0.000 abstract description 12
- 230000009182 swimming Effects 0.000 abstract description 3
- 238000009360 aquaculture Methods 0.000 abstract description 2
- 244000144974 aquaculture Species 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 6
- -1 polyethylene Polymers 0.000 description 3
- 241000251557 Ascidiacea Species 0.000 description 2
- 241000237547 Heteroconchia Species 0.000 description 2
- 241000237536 Mytilus edulis Species 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 241000383403 Solen Species 0.000 description 2
- 241000237538 Solenidae Species 0.000 description 2
- 241001262076 Veneroidea Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012258 culturing Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 235000020638 mussel Nutrition 0.000 description 2
- 238000006213 oxygenation reaction Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000001617 migratory effect Effects 0.000 description 1
- 230000000050 nutritive effect Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
Classifications
-
- 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
- A01K80/00—Harvesting oysters, mussels, sponges or the like
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Environmental Sciences (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Farming Of Fish And Shellfish (AREA)
- Catching Or Destruction (AREA)
Abstract
The invention relates to a method for capturing young Solen grandis in a nursery pond, and belongs to the technical field of aquaculture. The capture method comprises the following steps: controlling the water level of the seedling raising pond: controlling the water level in a breeding pond for capturing the solen grandis young shellfish to be 1-1.5 m; trawlnets with different meshes are selected to capture the solen grandis juvenile mollusks with different specifications: selecting a trawl with 10 meshes when capturing the solen grandis young shell with the shell length of more than 1 cm; selecting a trawl of 20 meshes when capturing the solen grandis young shell with the shell length of 0.7-1 cm; selecting a 40-mesh trawl net when capturing the solen grandis young shell with the shell length of 0.5-0.7 cm; capturing the solen grandis young shells by using a trawl: trawl time was from 20 hours to 4 days. According to the capturing method, the razor clam juvenile mollusks are fished in the breeding pond by adopting the trawl with a proper mesh, and the obtained individual razor clam juvenile mollusks are all uniform in specification, strong in swimming capability and good in vitality.
Description
Technical Field
The invention relates to a method for capturing young Solen grandis in a nursery pond, and belongs to the technical field of aquaculture.
Background
Solen grandis (Solen grandis) belongs to the phylum Mollusca (Mollusca), Bivavalvia (Bivavalvia), Heterodonta (Heterodonta), Veneroidea (Veneroidea), Solenidae (Solenidae), Solen genus (Solen), and is distributed in coastal areas of China, Philippines, Thailand, Japan, Korea, etc. The Solen grandis is tender and delicious in meat and rich in protein, is a precious marine product with high nutritive value, has the advantages of high growth speed, wide distribution range, strong adaptability, high economic value, huge market potential and the like, is an important economic shellfish in China, and is also one of main breeds for shellfish proliferation and release. In recent years, the declining of the Solen grandis resource in China coastal areas is serious due to the overlarge fishing strength, and the artificial breeding technology of the Solen grandis is gradually popularized. In the process of culturing the solen grandis, operations such as pond moving, ex-warehouse and the like all need a method for capturing young solen grandis, young shellfishes quickly, with low damage and uniform specification. At present, some methods for capturing young Solen grandis and young mussels exist in China, but the young and young mussels captured by the methods have different specifications, more impurities and higher death rate.
Such as: chinese patent application No. CN201410307634.1 describes a method for cultivating thin and fragile young shellfish buried in shellfish, the method uses a special polyethylene net to move the young shellfish to the pool, the specification of the young shellfish can not be screened, and impurities such as the young shellfish with poor activity and even death or glass ascidians can be left on the polyethylene net at the bottom of the net cage, and the impurities can be mixed into a new pool along with the pool moving process; the Chinese patent application No. CN201320352380.6 describes a method for collecting young Solen grandis by using a T-shaped siphon seedling emergence device for the young Solen grandis, which has the defects that the siphon area of the seedling emergence device is small, the time and labor are wasted for collecting the young Solen grandis in a large seedling culture pond, the young Solen grandis can be submerged in the siphon process to cause incomplete collection of the young Solen grandis, and impurities larger than the mesh of a filter screen can not be effectively removed; the traditional seedling screening method (sand and shellfish are mixed together, and seedlings are screened by using sieves with different meshes) can cause mechanical damage to the solen grandis, so that high mortality is caused, and the mortality is generally 20-30%.
Disclosure of Invention
According to the method, by utilizing the characteristics that the solen grandis inhabits sand in the daytime, submerges on the sand surface at night and submerges in water, the solen grandis young shells of different specifications are quickly captured in the indoor seedling raising pond by controlling the water level and using different mesh trawls at a specific time, and the problems that the specifications of the young shells of the solen grandis are unequal, the impurities are more and the death rate is high in the conventional method for capturing the solen grandis are solved.
The invention provides a capturing method of solen grandis juvenile mollusks in a nursery pond, which comprises the following steps:
controlling the water level of the seedling raising pond:
controlling the water level in a breeding pond for capturing the solen grandis young shellfish to be 1-1.5 m;
trawlnets with different meshes are selected to capture the solen grandis juvenile mollusks with different specifications:
selecting a trawl with 10 meshes when capturing the solen grandis young shell with the shell length of more than 1 cm;
selecting a trawl of 20 meshes when capturing the solen grandis young shell with the shell length of 0.7-1 cm;
selecting a 40-mesh trawl net when capturing the solen grandis young shell with the shell length of 0.5-0.7 cm;
capturing the solen grandis young shells by using a trawl:
trawl time was from 20 hours to 4 days.
If the water level in the nursery pond is too low, the young Solen grandis are easy to escape and drill sand; if the water level of the seedling raising pond is too high, the fishing operation is not facilitated; when the water level of the breeding pond is controlled to be 1-1.5m, trawling operation is facilitated, young Solen grandis cannot escape easily, and the capturing rate is high.
According to the invention, different trawls are selected according to different specifications for capturing the solen grandis young shells, and the solen grandis young shells in the seedling raising pond can be captured sequentially from big to small.
The trawling time is the most frequent time for the juvenile Solen grandis to swim underwater.
The invention preferably comprises the following steps of: and controlling the water level in a breeding pond for capturing the solen grandis to be 1-1.5m after the solen grandis sneaks sand in the daytime.
The invention preferably adopts the following steps of capturing the solen grandis juvenile mollusks by the trawl: and (5) keeping away from light 0.5h before trawling, removing an oxygenating device in the seedling culture pond, and trawling for 20 hours to 4 hours next day.
The light-resistant and oxygenation-removing equipment in the breeding pond is beneficial to improving the swimming potential of the solen grandis.
The invention preferably adopts the following steps of capturing the solen grandis juvenile mollusks by the trawl: and (4) keeping away from light 0.5h before trawling, removing an oxygenating device in the seedling culture pond, and completing trawling once within 2min from 20 hours to 4 days.
The invention preferably adopts the following steps of capturing the solen grandis juvenile mollusks by the trawl: and (3) keeping away from light 0.5h before trawling, removing an oxygenating device in the seedling culture pond, and completing trawling once within 2min from 20 hours to 4 hours of the next day, wherein the trawling interval is 0.5-1 h.
When the trawl is used, the trawl is kept fast and at a constant speed, and 90% of the razor clam juvenile spats can be caught by the trawl each time.
The purpose of the interval trawl is as follows: the migratory rate of the solen grandis juvenile mollusks in the breeding pond before trawling each time is 15-20%.
The invention has the beneficial effects that:
the capturing method reduces the mechanical damage caused by the traditional seedling screening method, and reduces the death rate from 20-30% to below 5%;
secondly, fishing the solen grandis in the breeding pond by adopting a trawl with a proper mesh, wherein the obtained individual solen grandis are all of uniform specification, strong swimming capability and good vitality;
and thirdly, impurities such as empty shells, glass ascidians and the like are not doped in the solen grandis young shellfish captured by the capturing method.
Detailed Description
The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way.
Example 1
A method for capturing young Solen grandis in a nursery pond comprises the following steps:
controlling the water level of the seedling raising pond:
water 25.46m of nursery pond3600 ten thousand grains of young Solen grandis with silt of 1.5cm, water temperature of 24-26 deg.C, salinity of 24-27, pH of 8.0-8.2 and average shell length of 0.5cmThe density is high, the pond needs to be moved, and the water level in the breeding pond for capturing the solen grandis is controlled to be 1.2m after the solen grandis is buried with sand in the daytime;
selecting different trawlnets according to different specifications for capturing the solen grandis:
selecting a 40-mesh trawl net when capturing the solen grandis young shell with the shell length of 0.5-0.7 cm;
capturing the solen grandis young shells by using a trawl:
trawling is carried out for 4 times at 20 hours, 21 hours, 22 hours and 23 hours respectively, the place 0.5h before trawling is protected from light, oxygenation equipment in the breeding pond is removed, trawling is completed once within 2min, the capturing amount is calculated after trawling every time, the captured solen grandis young shells are moved into a new breeding pond, and the number of the captured solen grandis young shells for 4 times is 100 ten thousand, 76 ten thousand, 64 thousand and 51 thousand in sequence.
The sand-hiding rate of the solen grandis young shells transferred into the new pool was observed to be 98% the next day 8.
Example 2
A method for capturing young Solen grandis in a nursery pond comprises the following steps:
controlling the water level of the seedling raising pond:
water body of nursery pond of 26.60m3Taking out the solen grandis young shells with the average shell length of 1.2cm, silt of 1.5cm, water temperature of 25-27 ℃, salinity of 24-27, pH of 8.0-8.2 and average shell length of 450 ten thousand, and controlling the water level in a young shell pond to capture the solen grandis young shells to be 1.2m after the solen grandis young shells submerge sand in the daytime;
selecting different trawlnets according to different specifications for capturing the solen grandis:
selecting a trawl with 10 meshes when capturing the solen grandis young shell with the shell length of more than 1 cm;
capturing the solen grandis young shells by using a trawl:
trawling for 3 times at 2min 40 min, 3 min 20 min and 4 h, keeping out of the sun 0.5h before trawling, removing oxygenation equipment in the breeding pond, completing one trawling within 2min, calculating the capture amount after each trawling, sequentially capturing 80 ten thousand, 58 ten thousand and 44 ten thousand of solen grandis juvenile mollusks for 3 times, and continuously culturing the solen grandis juvenile mollusks with shell length less than 1cm in the breeding pond.
Claims (1)
1. A method for capturing young Solen grandis in a nursery pond is characterized by comprising the following steps: the capturing method comprises the following steps:
controlling the water level of the seedling raising pond:
controlling the water level in a breeding pond for capturing the young Solen grandis to be 1-1.5m in the daytime after the young Solen grandis submerges sand
Trawlnets with different meshes are selected to capture the solen grandis juvenile mollusks with different specifications:
selecting a trawl with 10 meshes when capturing the solen grandis young shell with the shell length of more than 1 cm;
selecting a trawl of 20 meshes when capturing the solen grandis young shell with the shell length of 0.7-1 cm;
selecting a 40-mesh trawl net when capturing the solen grandis young shell with the shell length of 0.5-0.7 cm;
capturing the solen grandis young shells by using a trawl:
and (3) keeping away from light 0.5h before trawling, removing an oxygenating device in the seedling culture pond, and completing trawling once within 2min from 20 hours to 4 hours of the next day, wherein the trawling interval is 0.5-1 h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810414073.3A CN108575931B (en) | 2018-05-03 | 2018-05-03 | Method for capturing juvenile Solen grandis in nursery pond |
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| CN201810414073.3A CN108575931B (en) | 2018-05-03 | 2018-05-03 | Method for capturing juvenile Solen grandis in nursery pond |
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| Publication Number | Publication Date |
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| CN108575931A CN108575931A (en) | 2018-09-28 |
| CN108575931B true CN108575931B (en) | 2021-02-05 |
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Citations (6)
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|---|---|---|---|---|
| CN1336108A (en) * | 2000-07-31 | 2002-02-20 | 山东省日照市水产研究所 | Artificial method for breeding giant razor cham |
| CN101606496A (en) * | 2009-07-13 | 2009-12-23 | 大连獐子岛渔业集团股份有限公司 | Japanese scallop sea area breeding method |
| CN201393479Y (en) * | 2009-04-10 | 2010-02-03 | 中国海洋大学 | Trail net for shellfish seedling culture and tank transfer |
| CN102017920A (en) * | 2010-11-05 | 2011-04-20 | 大连獐子岛渔业集团股份有限公司 | Method for collecting indoors cultivated natural patinopecten yesoensis larvae by trawling |
| CN102106272A (en) * | 2010-12-30 | 2011-06-29 | 山东海益宝水产股份有限公司 | Seedlings-cultivating method of atrina pectinata |
| CN103168733A (en) * | 2013-04-15 | 2013-06-26 | 蓬莱市天保海水养殖有限公司 | Patinopecten yessoensis seedling culturing method |
-
2018
- 2018-05-03 CN CN201810414073.3A patent/CN108575931B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336108A (en) * | 2000-07-31 | 2002-02-20 | 山东省日照市水产研究所 | Artificial method for breeding giant razor cham |
| CN201393479Y (en) * | 2009-04-10 | 2010-02-03 | 中国海洋大学 | Trail net for shellfish seedling culture and tank transfer |
| CN101606496A (en) * | 2009-07-13 | 2009-12-23 | 大连獐子岛渔业集团股份有限公司 | Japanese scallop sea area breeding method |
| CN102017920A (en) * | 2010-11-05 | 2011-04-20 | 大连獐子岛渔业集团股份有限公司 | Method for collecting indoors cultivated natural patinopecten yesoensis larvae by trawling |
| CN102106272A (en) * | 2010-12-30 | 2011-06-29 | 山东海益宝水产股份有限公司 | Seedlings-cultivating method of atrina pectinata |
| CN103168733A (en) * | 2013-04-15 | 2013-06-26 | 蓬莱市天保海水养殖有限公司 | Patinopecten yessoensis seedling culturing method |
Non-Patent Citations (2)
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