A kind of scientific releasing method of Chinese horseshoe crab seed

A seedling and scientific technology, applied in the field of proliferation and release of rare marine species, can solve the problems of unreasonable and unscientific artificial release process, and achieve the effects of reducing the risk of predation, improving the survival rate and prolonging the breeding time.

Active Publication Date: 2021-03-30
QINZHOU UNIV
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of existing multiplication and release methods, the purpose of the present invention is to provide a scientific release method for Chinese horseshoe crab seedlings, which can meet the survival and growth needs of the seedlings in the natural environment, and overcome the unreasonable and unscientific limitations of the current artificial release process. problems, thereby improving the survival rate of released seedlings and ensuring the effect of releasing

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  • A kind of scientific releasing method of Chinese horseshoe crab seed

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Embodiment 1

[0032] 1. Site selection for release: release in the intertidal zone (4) mangrove (3) periphery of the existing nursery of horseshoe crabs in China;

[0033] 2. The source and specification of released seedlings: in spring and summer, the crabs that landed and spawned are transported to the adjacent farms to induce spawning, and the seedlings are bred in an artificial environment from 11 months to 7 years old. The width of the carapace 38 ± 2 mm, the seedlings are released on the same beach as the source of the pro-Limulus;

[0034] 3. Health inspection of released seedlings: extract 1-5% of the total number of 7-year-old seedlings for health inspection to ensure that the released horseshoe crabs have a good health level: the cell survival rate is 70-82%, and the proportion of spherical granule cells is 60-87%;

[0035] 4. Timing of release: release the seedlings to the intertidal zone during the ebb tide from May to July;

[0036] 5. Transport seedlings: 10-15 tails of 7-yea...

Embodiment 2

[0039] 1. Release site selection: Monitor the habitat conditions in the damaged Chinese horseshoe crab nursery to ensure that it is consistent with the existing nursery conditions: the sediment is sandy and muddy, with a particle diameter of 0.22-0.55 mm and a total organic content of 3-23%, interstitial water content 16-23%, surface water salinity 20-34‰, pH 6.4-8.0, dissolved oxygen higher than 6 micrograms per liter, there are small polychaetes, bivalves and crustaceans. (4) Set up fixed nets or other anti-predation facilities, mesh 7-10, and the tidal flat area of ​​the seine net is more than 2000 square meters to provide enough tidal flat area for the seedlings to forage;

[0040] 2. The source and specification of released seedlings: buy horseshoe crabs around the sea area where the release site is selected, transport them to the adjacent farms to induce spawning, and breed the seedlings in an artificial environment for 1-2 months to the 1st age stage. The first-year-old...

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Abstract

The invention discloses a scientific releasing method of tachypleus tridentatus larvae. The scientific releasing method of the tachypleus tridentatus larvae includes the following steps of 1, selecting a releasing site; 2, selecting the source and specification of the tachypleus tridentatus larvae; 3, conducting health examination on the tachypleus tridentatus larvae, wherein 1-5% of all the released 7-day-old tachypleus tridentatus larvae are extracted to be subjected to health examination, it is ensured that the amoebocyte survival rate of the tachypleus tridentatus larvae and the proportionof globoid granular cells of the tachypleus tridentatus larvae are at good and healthy levels, the amoebocyte survival rate of the tachypleus tridentatus larvae is 70-82%, and the proportion of the globoid granular cells of the tachypleus tridentatus larvae is 60-87%; 4, selecting time for releasing, wherein an ebb tide period is selected for releasing the tachypleus tridentatus larvae to a intertidal zone at sunny or cloudy days, the temperature of water is higher than 20 DEG C, and a canicular fishing ban period is combined to release the tachypleus tridentatus larvae; 5, transporting the tachypleus tridentatus larvae to be released; 6, evaluating releasing effects. The scientific releasing method of the tachypleus tridentatus larvae accords with the biological features of the tachypleus tridentatus larvae, operation is scientific and reasonable, the population quantity of tachypleus tridentatus is effectively recovered, and therefore high-value tachypleus tridentatus can have greater ecological, economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of breeding and release of rare marine species, in particular to a scientific release method for Chinese horseshoe crab seedlings. Background technique [0002] Chinese horseshoe crab (Tachypleus tridentatus), also known as Oriental horseshoe crab, Chinese horseshoe crab, three-spined horseshoe crab, and husband and wife fish, belongs to the phylum Arthropoda, the subphylum Chelicidae, the class Limulus, the order Limulidae, and the family Limulidae. Existing horseshoe crabs in the world can be divided into two subfamilies, three genera and four types. They are the only extant species of Limulus on the earth. The earliest fossils of them can be traced back to the Cambrian period about 485 million years ago. Existing horseshoe crabs have experienced five extinctions of biological clusters and have survived until now. There has not been a huge change in their morphology and structure. They are rare marine "liv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/59
CPCA01K61/59Y02A40/81
Inventor 关杰耀颉晓勇周海超廖永岩符益健黄淑燕况洋吴宙陈俏邓萌
Owner QINZHOU UNIV
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