The methods to preserve river crabs and make them live longer are as follows: live storage and frozen storage.
1. Live storage method
If you buy live river crabs, it is best to place them in a clean, moist container to simulate their natural living environment. The water temperature should be kept at around 10 degrees Celsius and should not be too cold or too hot. At the same time, pay attention to check whether the container has sufficient oxygen supply, and place some aquatic plants appropriately for it to breathe.
2. Freezing storage method
Put the processed river crabs into a plastic bag suitable for freezing, seal the bag and mark the date. Place it in the freezer and maintain the temperature below minus 18 degrees Celsius. By freezing, the freshness of river crabs can be effectively maintained, but it should be noted that the freezing time should not be too long to avoid affecting the taste and quality.
Precautions for preserving river crabs
River crabs have high requirements on water quality and should choose clean and pollution-free water sources. It is best to use a filter to filter the water to ensure that the water is free of impurities and harmful substances. Secondly, river crabs are suitable for living in an environment with a water temperature of 18-25 degrees Celsius. Water temperatures that are too high or too low will have an adverse impact on their survival. Therefore, the water temperature should be kept stable and drastic temperature fluctuations should be avoided.
River crabs are omnivores and can eat plants, small fish, plankton, etc. During the breeding process, balanced feed should be provided, including protein, carbohydrates, vitamins, etc., to meet their nutritional needs. Regular cleaning of breeding containers and changing water quality are important measures to maintain the health of river crabs. It should be noted that river crabs have a certain ability to crawl, and the breeding container should be designed to prevent them from escaping. A suitable mesh or lid can be used to cover the breeding container to ensure the safety of river crabs.