How to ensure the survival rate of newly hatched larvae?
The rainbow trout fertilized eggs can hatch larvae after 343 accumulated temperatures, and the broken larvae can swim in the same time after hatching and then start to feed on the outside. During this period, the fish of the larvae were extremely delicate and had almost no ability to swim. They could easily suffocate due to poor water flow and accumulation of hypoxia. Therefore, creating a good nurturing environment is the focus of larval management. The membrane-breaking larvae lie on the bottom of the water before floating up, relying solely on the absorption of the internal yolk as a nutrient, weak activity, and easy accumulation. At this time, the water injection volume should be appropriately increased, and the injection volume per 100,000 fish should be 20 liters/minute or more. This stage is particularly important from the rupture of membranes to the accumulation of temperature at 120 degrees. When the accumulated temperature reached 120 degrees Celsius, the larvae of larvae differentiated, their activity increased, their body pigments deepened, their darkening increased, their individual size increased, and their resistance increased. At this time, the larvae were not likely to die under normal circumstances. From the accumulated temperature of 240 degrees to the floating stage of larvae, it is easy to die due to yolk sac edema, crescent deformity, bubble disease and so on. At this time, it should be observed and carefully managed to reduce losses. Avoid exposure to direct light during larvae. The management point is that the amount of water to be injected should not be excessive, the larvae should not be piled up, and the dead seedlings should be removed in time to maintain the cleanliness of the breeding environment. Gas Detector With Output Relay RICTRON Industrial Co., Ltd is a hight-tech OEM/ODM enterprise, we are specialized to produce the products such as fire smoke alarm, carbon monoxiede alarm, gas alarm, water alarm, smoke&co or gas&co combined alarms, and other products of R&D, manufactring and sales since 2008. Lpg Gas Detector,Portable Gas Detector,Gas Detector Alarm,Lpg Leakage Detector Rictron Industrial Co., Ltd , https://www.szrictron.com
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