Management techniques of sea cucumbers during overwintering

With the continuous decline of air temperature and the gradual decline of water temperature, sea cucumbers began to enter the overwintering period, when the temperature of the pond was generally lower than that of the shallow sea, coupled with the residual excreta during the period of high temperature. after freezing over the winter, sea cucumbers are prone to hypoxia, bubble disease and other problems. Therefore, the overwintering management of sea cucumbers is extremely important. Let's take a look at the overwintering management techniques of sea cucumbers.

1. Key points of management

According to the climate change, the overwintering period of sea cucumbers can be divided into three stages: pre-icing, icing and melting. The management measures of each stage are different. Any mistake in any step may lead to the overwintering failure of sea cucumbers, resulting in huge economic losses.

2. Pre-icing management

As the air temperature drops, the water temperature also drops, so the first thing to do is to increase the water temperature, which is conducive to maintaining the stability of the underwater environment, and can avoid stress reactions and diseases caused by wind and Wendy to water quality and sediment to sea cucumbers. In addition, raising the water level can also inhibit the growth of aquatic plants, the temperature is different in different areas, so the water level is also different, generally between 1.5-2 meters. It is also necessary to strengthen the management of water quality and sediment, which is still the maximum time for feeding in autumn, so the bottom of the culture pond accumulates a large amount of excrement, which will ferment and deteriorate at low temperature, resulting in toxic substances, resulting in the death of a large number of sea cucumbers. Therefore, before freezing, the whole pool should be sprinkled with oxidizing substrate improver to decompose organic matter, improve sediment and detoxify, so that sea cucumbers can grow safely. Like the bottom material, the management of water quality can not be ignored. The temperature is low in winter and the water quality is difficult to deteriorate. The main problem to be solved is dissolved oxygen, insufficient dissolved oxygen, resulting in anoxic death of sea cucumbers, so good measures of dissolved oxygen should be taken before freezing.

3. Ice period management

After freezing, we should regularly check the water quality and sea cucumbers, pay special attention to water quality hypoxia and bubble disease, and solve problems in time to reduce losses. Winter snow will affect the photosynthesis of algae in the water and reduce the dissolved oxygen in the water, so it is necessary to remove the 2 snow on the ice in time after snow, so that the algae can normal photosynthesis, release oxygen, increase dissolved oxygen, so as not to cause hypoxia. When the temperature picks up, the duration of light increases, the algae and grasses in the water grow vigorously, and photosynthesis produces more oxygen, which will lead to excessive dissolved oxygen in the water, and if it is not released in time, it will cause the occurrence of bubble disease. at this time, it is necessary to make ice holes on the ice and release the excess oxygen.

4. Ice melting period management

When the temperature rises gradually and the ice gradually melts, the salt and temperature in the water will drop sharply, which can easily lead to stress reaction and lead to the death of sea cucumbers. In areas with thicker ice sheets, the melting of the ice sheet during the melting period will lead to the accumulation of a large amount of fresh water on the surface, resulting in a lack of oxygen in the lower layer, so it is necessary to discharge the fresh water in time and inject it into new sea water. There is to deal with the bottom material, frozen for a long time, there are a large number of dead and rotten aquatic plants at the bottom, they will ferment and accumulate harmful substances, and when the temperature rises when melting ice, sea cucumbers begin to eat them, which will cause swollen mouths, peeling and other phenomena. Therefore, after melting ice, improvers should be put in time to decompose the organic matter at the bottom of the pool. If phenomena such as swollen mouth and peeling are found, disinfectants with small irritation can be put into the whole pool, and disinfectants with greater irritation are not recommended to avoid adverse reactions of sea cucumbers.

The above are the overwintering management techniques of sea cucumbers. I hope I can help you. If you want to know more about sea cucumber culture, please follow us.