Comprehensive filamentous alga prevention and control method for intermediate culture key technique of tridacnidae young shellfishes

Abstract

The invention discloses a comprehensive filamentous alga prevention and control method for an intermediate culture key technique of tridacnidae young shellfishes. The method comprises the following steps: (1) carrying out light-shading culture in a culture stage of the tridacnidae young shellfishes by virtue of purple blue light-transmission corrugated tiles, wherein the wavelength of light is controlled during the culture, and the illumination intensity range is 6000Lux-15000Lux; (2) maintaining seawater for culturing the tridacnidae young shellfishes at normal salinity and temperature, maintaining KH of a seawater body at 8-10, and maintaining pH of the seawater body at 8.0-8.5; (3) adding denitrifying bacteria and bacillus into the seawater at a fixed period of one week; and (4) when finding that brown or green spot algae occur in a culture pool and have the trend of expanding day by day, adding dried Chinese lobelia herb into the culture pool, if dead organisms are found, timely picking out the dead organisms, and carrying out proper processing. According to the comprehensive filamentous alga prevention and control method, break-out of filamentous algae can be effectively inhibited, so that the success rate of intermediate culture of the tridacnidae young shellfishes is remarkably increased; and the comprehensive filamentous alga prevention and control method has multiple characteristics of relatively low cost, good effect, easiness in execution and the like.

Description

technical field [0001] The invention belongs to the field of artificial cultivation of giant clam shellfish in the marine aquatic industry, and in particular relates to a method for comprehensive prevention and control of filamentous algae which is a key technology for the intermediate cultivation of juvenile giant clam shellfish. Background technique [0002] Tridacna is the largest species of marine bivalve mollusk belonging to the clam order, family Tridacnidae (Tridacnae) of the genus Tridacna or the genus Tridacna. Distributed in the tropical and subtropical oceans of the Indian Ocean and the Pacific Ocean, especially in the South China Sea, the Philippines, Indonesia and Australia. In my country, it mainly exists in the coral reef areas of Nansha Islands, Xisha and Hainan Island, and is one of the main functional organisms of coral reefs. The maximum shell length of giant clams is recorded to be 1.8 meters, and the weight exceeds 300 kilograms. The growth rate of gian...

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Problems solved by technology

However, there are many predators in natural sea areas, and the environment is deteriorating day by day. my country lacks technical development and practical experience in the artificial propagation and release of giant clams. There are very few reports on the success of artificial breeding of giant clams and the cultivation of spat and juvenile shellfish. At present, there is only one article (Zhang Yuehuan ,2016)