Research on the productivity of HELUX ASPERSA MAXIMA snails when fed with a lysine-methionine supplement
Abstract
Snails are unique living creatures that contain dietary meat, lay beneficial eggs, and synthesize healing mucus. Meat contains minerals: calcium, iron, zinc, bromine, copper, manganese and selenium; vitamins – B1, B2, B3 (PP), B9, A, E; replaceable and essential amino acids: arginine, histidine, serine, alanine, glycine, tyrosine, proline, lysine, phenylalanine, leucine+isoleucine, methionine, valine, threonine, and also contains 20 amino acids, as well as ω-3 and ω-6 fatty acids. Snails have a positive effect on the human body. They help prevent atherosclerosis and liver disease and are recommended for people suffering from a calcium imbalance in the body because bone-cartilage tissue is restored and strengthened, helps to reduce cholesterol levels in the blood, and contributes to maintaining the cardiovascular system. Snail caviar: increases immunity; strengthens blood vessels and bones; improves vision; normalizes metabolism; rejuvenates cells; normalizes blood pressure; increases hemoglobin level in the blood. Intensive heliciculture involves feeding snails with a mixture of feeds of various origins and feed additives, among which the essential amino acids lysine and methionine are critical metabolic important. In the course of the experiment, the effect of lysine-methionine additive in feeding the grape snail was established, based on which positive results were obtained, in which the snail assimilates food better and achieves a greater weight of the marketable mass. When comparing the experimental and control groups, and during the growing period, the productivity of the experimental group was 7043 kg compared to the first – 6115 kg, which is 15.2 % more. An increase in the average weight of the commercial snail in the experimental group, which is 29 g, was noted in the control group 26. In addition, the survival rate of the snails of the experimental group and better eating and assimilation of feed in the animal's body were noted. It was experimentally established that when such an amino acid supplement (0.25 % by weight) was introduced into the diet of commercial snails, growth increased; therefore, from the second decade of August, a larger mass of snails of the experimental groups was noticeably compared to the control group, which contributed to faster achievement of marketable weight. When analyzing the economic efficiency of cultivation, it was established that when using a lysine-methionine additive in snail feed, the net profit increased by 23.4 % compared to the control group.
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