There are two forms of reproduction, parthenogenesis and hermaphroditism (i.e. parthenogenesis), which can lay the nauplius larvae or ovulate directly. In the case of direct ovulation, the eggs were divided into summer eggs and winter eggs. After the summer eggs were laid, they quickly hatched into nauplii in water, which was basically the same as that of the eggs laid directly by the mother. The winter eggs are dormant eggs, generally in the harvest shrimp's living environment has a relatively large change, such as cooling, rising sea water (that is, water evaporation, salinity is getting higher), food shortage, chemical stimulation, the harvest shrimp will lay dormant eggs. Dormant eggs have thick shells and can tolerate harsh environmental conditions. Generally, they do not hatch directly in water. They need to return to the water after a certain diapause period to hatch. Most of the dormant eggs are floating water, so it is convenient to collect them. This is how the shrimp population resists harsh conditions, protects offspring in the form of dormant eggs, and hatches when the environment returns to normal.
artemia Brine Shrimp (5 pieces)
The artemia brine shrimp that we buy in the form of commodities are dormant eggs. The dormant eggs can survive for about 5 years under the condition of low temperature, dry and restless. When they re-enter the normal temperature sea water, or absorb water in the humid environment, the embryos in the shell will start metabolic activities, enter the hatching process, and finally break out of the shell and become nauplius larvae. The newly hatched nauplius larvae have yolk sacs. They do not need to be fed in one day. They can reduce their nutritional value by about 20% in one day. If the nauplii larvae are fed to the larvae of small or large fish, they should be harvested and fed as soon as possible during hatching. Under suitable conditions, the nauplii larvae can reach the length of adult shrimp after about ten days of breeding, about 1 cm for females and 0.7 cm for males.
Ornamental fish enthusiasts generally use the harvest shrimp to raise fish, are bought harvest shrimp eggs, hatched directly after feeding. The newly hatched nauplius larvae of juvenile shrimp contain a large amount of protein and unsaturated fatty acids, which are high-level nutritional feeds for ornamental fish. However, the newborn nauplii larvae are very small, less than half a millimeter long, and slightly larger fish do not feed on them. If the nauplii larvae are raised, especially the adult adult with eggs, the nutritional value of nauplii larvae will be incomparable. After experimentation, the shrimps were successfully reared on a small scale in the family, and the shrimps could continue to produce offspring after adulthood, thus realizing the culture of high quality live food without cost.
Previous: No Information