Black leeches and their breeding techniques
Black scorpion is the only species of water fleas found in the subfamily Diptera. Black scorpion fish originated in the savannah of South America and subsequently spread throughout the American continent. In recent decades, with the progress of globalization and intercontinental trade, the black scorpion has expanded to tropical and subtropical regions and some temperate regions throughout the world. In 2012, the United States, China, South Korea, Japan, Hong Kong, New Zealand, Vietnam and other countries and regions have begun to carry out research and exploration of the resources utilization of the Black Seabream. China Insect Network has been involved in the exploration and research of the breeding of blackwater bream since 2005, and has made gratifying achievements.
In China, Beijing, Shandong, Shaanxi, Guangdong, Guangxi, Hunan, Fujian, Yunnan, Sichuan and other places have all discovered the distribution records of wild black otters, and have become one of the most common leeches in China. Black leeches and golden leeches are representative corrosive species of leeches.
Second, the prospects and utilization of Heilongjiang aquaculture
Black scorpion is an insect of the Diptera leech family. Adults are similar to flies but larger in size. The larvae have a wide range of natural feeding and are an important part of the natural food chain in the detritus. Black leeches are commonly used in pig sheds and broiler houses to feed fresh pig manure, chicken manure, and larvae to reduce pollution while converting garbage into insect bio-chains. It is an ideal environmental insect.
Adults fly, do not eat and fly into the world. Their life span is only 10 days. Their spawning capacity is as high as 1,000 grains. The egg period is 4 days, and the larval period is 15 days in the water. It is the most ideal live aquatic feed, and one larva can handle 2-3 kg of garbage. The pupa period is 15 days. It can be active under low humidity and crawl in the early stages. The number of black-sucked larvae can effectively inhibit fly breeding.
Blackwater larvae larvae can be used as food to convert food and animal waste livestock and poultry manure agricultural waste and byproducts into their own substances, such as proteins, lipids, etc., and can reduce the problem of increasingly serious environmental pollution caused by garbage, and process the harvested larvae. Adult animal protein feed additives can also be fed directly to chickens, fish, turtles, shrimps, astragalus, arowana, birds, rare birds, frogs and other larvae can also be extracted antibiotics, fatty agents, etc., production of cosmetics, topical drugs, especially for rheumatic Efficacy of wet hair loss and other symptoms is significant.
The success of artificial breeding of Hydra blancoides has shown new social and economic benefits. It has high pollution-free productivity, high protein content and easy production of low cost, and high profitability has broad market and industrialization prospects.
It is also possible to establish circular ecological farms, environmental protection demonstration zones, and insect exhibition halls to promote the development of the livestock and poultry industry, develop the rural economy, increase the income of farmers, and improve farmers' access to low-carbon life. Therefore, it has important socio-economic and ecological significance.
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