Pearl oysters are a popular seafood product widely distributed in the coastal areas of Fujian and Guangdong, especially in the coastal areas of Guangdong. There are many types of pearl oysters, including pearl oysters, large pearl oysters, etc. How to artificially cultivate pearl oysters? Let's find out together.
Pearl oyster cultivation
Can be roughly divided into three stages. Now we will take artificial mussel breeding as an example for a brief explanation.
(1) Preparation stage.
First of all, pearl-producing animals must be cultivated and selected. Since different pearl-producing animals have different environmental requirements, it is necessary to select excellent varieties adapted to the environmental conditions of the region. On farms, artificial breeding is usually necessary indue to the large number of pearl-producing animals required. It generally takes 2 to 3 years to reproduce from larvae to usable individuals. For juvenile mussels, this directly affects the secretory function of the cell assembly, individual viability and bead quality.
(2) Pearl cultivation operation step. Divided into the following two situations.
1. Growing Seedless Pearls: The operation is divided into two stages: production and implantation.
Membrane manufacturing involves removing the outer part of the membrane skin from the edge of the shell to create cell fragments, processing and repairing them into 5mm square fragments, clean the front side of the cell fragments and unfold them. the glass plate upwards. Add maintenance fluid for later use. Insertion is the insertion of small pieces of prepared cells into the connective tissue ofu coat of the pearl oyster. The outer epidermal cells form sac beads, which secrete nacre to form beads.
2. Nucleated Beads: The difference between nucleated beads and non-nucleated beads is that the core of the bead needs to be prepared. The core of freshwater cultured pearls can be made of glass, agate, marble and other materials, but it is best to use shell as the core. It is then bleached, polished and washed, cleaned and disinfected before use. Once the bead is ready, the process of inserting the nucleus and sending out the cell pieces is complete. Nucleated beads use small pieces of cells that should only measure 2mm on a side and are sent with the beads. Additionally, if the mussel spits out pits after inserting the pit, small pieces of pitless river mussels can also be inserted.
The best season for inserting pearls is the end ofspring and early summer. Summer and fall are the seasons when mussels secrete pearls.
(3) Culture of pearl clams.
Whether nucleated or nucleated, the pearls must be returned to the pearl farm for cultivation after the operation. The farm environment has a great relationship with the growth rate of pearls. The water flow is regular and. the oxygen content is sufficient. When the food is strong, the water temperature should be 18 to 25 and the pH should be around 7 to 7.5. In this environment, shellfish have a strong metabolism, a strong ability to secrete nacre, heal wounds quickly, and are less likely to die. In the right cycle year, the insert can form a pearl sac in 10 to 20 days and start secreting nacre in 25 to 30 days.
Pearl clams are grown on pearl farms using planta methodssuspended, in a cage or on the ground. During the breeding process, good management must be carried out to prevent the occurrence of mussel diseases and other dangerous events.
The above is the answer on how to grow pearl oysters. I hope this can help farmers interested in growing pearl oysters.
Oyster (OSTrea gigas tnunb), commonly known as sea oysters, oysters, etc., belongs to the phylum Mollusca, class Bivalvia, order Pearl Conchilida. It is the largest cultivated shellfish in the world. It is one of the important marine biological resources available. humans and is distributed globally. Oysters are not only delicious and nutritious, but also have unique health functions and medicinal value. They constitute a treasure of seafood with high nutritional value. Oysters contain the highest amount of zinc among foodshuman beings. Oysters are believed to have the functions of curing weakness, relieving erysipelas, lowering blood pressure, nourishing yin and strengthening yang. ? As a high-quality marine shell, oysters not only have delicious meat and edible value, but their meat and shells can be used as medicine and have high medicinal value.
Pacific oysters have two scallop shells on the left and right. The shell on the right is smaller and flat. The surface of the shell has wavy, loosely arranged annular scales.
The shape of the shell varies considerably, being oblong or long triangular. The left shell is deeply embedded and the scales are closely arranged. The top of the shell is used to attach it to hard objects such as rocks and boulders. to grow. The inner surface of the shell is white and the inner surfacedull of the shell is white. There are wide ligamentous grooves.
The adductor muscle scar is large and the mantle edge is black. Pacific oysters are distributed along the northern and southern coasts of China and are eurythermal shellfish. It has great adaptability to salinity. It is mainly distributed in shallow marine areas, from the low tide line to a water depth of 20 meters. It can inhabit marine areas with salinity of 10 to 37. The optimal salinity range for growth is 20 to 31, but salinity only decreases for about 40 hours when it reaches 6.5 or lower.
It is also highly adaptable to water temperature. It can generally survive in the water temperature range of -3 to 32℃. The suitable water temperature is 8-32℃ and the optimal water temperature is 15-32℃. 25℃ When the water temperature, the rate ofGrowth is slow or stops when the temperature exceeds 28℃.