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A method for increasing the metamorphosis rate of giant clam larvae

A larval and metamorphosis technology, applied in climate change adaptation, application, fish farming, etc., can solve problems such as the inability to achieve large-scale production of Tridacina fry, low metamorphosis rate, etc., to improve the larval metamorphosis rate and reliable technical support Effect

Active Publication Date: 2019-05-31
SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With such a low rate of metamorphosis, it is impossible to realize the large-scale production of giant clam seedlings. As a result, research on giant clam breeding is almost always scientific research, and the number of each production is usually less than 10,000 spat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] a. Controlling the density of larvae: On May 5, 2016, at the Hainan Tropical Marine Biology Experimental Station of the South China Sea Institute of Oceanology, Chinese Academy of Sciences, the larvae of Tridacna pedescens were used as experimental materials, and they were placed in eight 10L containers filled with fresh seawater. Inside the plastic box, the bottom area of ​​the plastic box is 25×20=500cm 2 , the density is adjusted to 5 / cm 2 (50,000 pieces / m 2 ), a total of 2,500 larvae were put in; during this period, the seawater used required double sand filtration, the temperature was controlled at 28-30°C, the salinity was controlled at 32-35ppt, and the pH was controlled at 8.1-8.3;

[0019] b. Add shell-shaped coralline algae: Shell-shaped coralline algae are collected from coastal coral reefs in Xiaodonghai, Sanya, Hainan, and then made into 1-2cm with hammers, pliers, etc. 2 After soaking in fresh sea water for 24 hours, add 5cm 2 Shell coralline algae, the...

Embodiment 2

[0024] a. Controlling the density of larvae: On May 10, 2016, at the Hainan Tropical Marine Biology Experimental Station of the South China Sea Institute of Oceanology, Chinese Academy of Sciences, the larvae of Tridacna pedunculata were used as experimental materials and placed in six 10L containers filled with fresh seawater. Inside the plastic box, the bottom area of ​​the plastic box is 25×20=500cm 2 , the density is adjusted to 10 / cm 2 (100,000 pieces / m 2 ), a total of 5,000 larvae were placed; during this period, the seawater used was filtered with a 2μm membrane, the temperature was controlled at 28-30°C, the salinity was controlled at 30-33ppt, and the pH was controlled at 8.1-8.3;

[0025] b. Add shell-shaped coralline algae: Shell-shaped coralline algae are collected from coastal coral reefs in Xiaodonghai, Sanya, Hainan, and then made into 1-2cm with hammers, pliers, etc. 2 After soaking in fresh sea water for 24 hours, add 4cm 2 Shell coral algae, scale 80cm 2 ...

Embodiment 3

[0030] a. Controlling the density of larvae: On May 9, 2016, at the Hainan Tropical Marine Biological Experimental Station of the South China Sea Institute of Oceanology, Chinese Academy of Sciences, the larvae of the giant oyster's foot plate were used as experimental materials and placed in nine 10L plastic containers filled with fresh seawater. Inside the box, the bottom area of ​​the plastic box is 25×20=500cm 2 , the density is adjusted to 5 / cm 2 (50,000 pieces / m 2 ), a total of 2,500 larvae were placed; during this period, the seawater used was filtered with a 2μm membrane, the temperature was controlled at 28-30°C, the salinity was controlled at 32-35ppt, and the pH was controlled at 8.0-8.3;

[0031] b. Add shell-shaped coralline algae: Shell-shaped coralline algae are collected from coastal coral reefs in Sanya, Hainan, and then made into 1-2cm pieces with hammers and pliers 2 After soaking in fresh sea water for 24 hours, add 5cm 2 Shell coralline algae, scale 100...

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Abstract

The invention discloses a method for increasing the distortion rate of giant clam larvae. The method includes the following steps that 1, the density of the larvae is controlled, wherein foot veliger larvae of giant clams serve as materials, and the density is controlled to range from 50,000 / m<2> to 100,000 / m<2>; 2, crustiform coralline algae is added, wherein the crustiform coralline algae is added into a distortion container, and the adding proportion ranges from 80 cm<2> / m<2> to 100 cm<2> / m<2>; 3, zooxanthellae is implanted, wherein the zooxanthellae in fresh excrement of the giant clams serves as a larva zooxanthellae source; 4, larvae are collected through a water purification method, wherein after the larvae, the crustiform coralline algae and the zooxanthellae in the excrement are added into a larva collecting container, no inflation or water change is needed, a certain amount of zooxanthellae is added every day, treatment is carried out for 7-12 d through the water purification method, and the larvae are promoted to distort. By means of the method, the distortion rate of the giant clams can be increased to 10% or above from less than 1%. The distortion rate of the giant clam larvae can be greatly increased, a large quantity of giant clam juvenile mollusks is obtained, and a reliable technical guarantee is provided for large scale, industrialization and commercialization of production of the giant clam larvae.

Description

technical field [0001] The invention belongs to the technical field of shellfish breeding in marine agriculture, and in particular relates to a method for improving the metamorphosis rate of giant clam larvae. Background technique [0002] Tridacna can be divided into the genus Tridacna and the genus Tridacna. Among them, the giant clams in my country mainly include giant clams (almost extinct), scaleless giant clams (rare), scaled giant clams, long clams, and Nova clams. There are 6 kinds of giant clam and saffron giant clam; there are mainly 2 kinds of giant clam oysters and porcelain mouth giant clam oysters. Since giant clams use zooxanthellae as their main source of nutrition, they can produce O 2 and CO 2 , so a single individual is not only an ecosystem, it is a dominant species in coral reefs, and has a strong function of building reefs. Giant clam is also known as the "undersea giant panda". Around the 1980s and 1990s, a group of foreign scientific research forces...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/54
CPCY02A40/81
Inventor 喻子牛张跃环肖述张扬
Owner SOUTH CHINA SEA INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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