泥螺人工养殖技能(国外英文资料).docVIP

泥螺人工养殖技术(国外英文资料) Clay snail breeding technology In the past, the snail was regarded as a low-value shellfish. In recent years, as the food structure has changed, the snail has been regarded as a special flavor food and it has been exported. One, life habit: 1, the habitat. Mud snails are found in silt or soft mudflats and can be found in the sandy bottom. The natural distribution is usually in the low tide zone of the middle and low tide zone, which is the highest in low tide zone. Several meters of water under the tide have also been found, but are rare. And then move up and down as the season changes. Food and growth. The snail is a kind of edible shellfish, which is generally fed by diatoms and organic detritus. A year of mud snail, the shell can reach 19 mm, the shell width can reach 14 millimeter. The whelks grow quickly in March and June, and by may the shells can be as high as the snails. 3, breeding habits. The mud snail is female, male cobody, 1 age can reach sexual maturity, biology the smallest is the shell is 12 centimeters high. When the female is sexually mature, the female, male, and the male are born in the same sex gland, which is located on the left side of the snail, in the liver cell, and in the mature, pale green -- light yellow. The breeding season varies with the region. In the north of zhejiang, the spawning period is 3 to November, and the spawning peaks are in the 5th - June and October. In south zhejiang, the spawning period is between 5 and 6 months and 8 to 9 months. The shell of a snail is an egg bag shaped like an egg yolk. The egg bag has a colloid handle and can be buried in the mud, and the egg group is fixed in the mud. In the natural sea, the mud snail often produces eggs in gutters, pools or puddles, to ensure that there is water around the egg colony when the tide is low, and not to be damaged by dry dew. Artificial farming techniques: The choice of breeding grounds. According to the ecological habit of snail, breeding ground s