Measuring a person`s temperature can be done in several ways. One method to measure a person`s surface temperature is with the use of non-contact infrared thermometers (NCITs). NCITs may be used to reduce cross-contamination risk and minimize the risk of spreading disease. While typically 98.6°F (37.0°C) is considered a [normal" temperature, some studies have shown that "normal" body temperature can be within a wide range, from 97°F (36.1°C) to 99°F (37.2°C). Before NCITs are used, it is important to understand the benefits, limitations, and proper use of these thermometers. Improper use of NCITs may lead to inaccurate measurements of temperature.
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The impact of water quality on lobster production cannot be ignored either. The quality of water directly affects the healthy growth and development of lobsters. In the breeding process, the ph value of the pool water is maintained at between 7. 5-8. The transparency is 30-40 cm. It is necessary to constantly add new water and pour on time. Lime solution, conditioning water quality, to avoid the occurrence of disease and unshelled and so on.
The second is to properly feed the feed. When lobsters are under hunger and food shortage, they will be in the same room, so the amount of feed must be sufficient. Lobster feed is animal and plant feed. Vegetable feed is wheat, aquatic grass, rapeseed cake, etc. Animal feedstuffs are miscellaneous fish, miscellaneous meats and livestock viscera. The feeding time, feeding amount, and feeding method are usually determined based on the lobster's habit of nocturnal feeding and the density of shrimp in the pond. Otherwise, it will increase the amount of feed and reduce the breeding efficiency.
The third is scientific fishing. In the lobster culture process, juvenile shrimps can grow to commercial specifications within 60 to 90 days at the appropriate temperature and adequate feed. In March, the seedlings were released, and in June they began to be arrested and sold. Because catching big and keeping small and catching in rotation, we can improve the rate of recovery and sell good prices to achieve the goal of high yield and high efficiency.
Freshwater crayfish) Introduction to farming techniques Freshwater lobster, the scientific name crawfish crayfish, also known as lobster, lobster, red shrimp. The shrimp was originally produced in the United States and was introduced to Japan from Japan during the Second World War. It is now widely distributed in the middle and lower reaches of the Yangtze River. The shrimp is a tropical freshwater prawn, with strong adaptability, high breeding rate, mixed diet, fast growth, resistance to disease, high temperature resistance, low oxygen tolerance, and no death from water for several hours. Shrimp is tender, nutritious, contains 8 amino acids that are essential for the human body, and has a low fat content. It also contains more tropomyosin and paramyosin, which are more edible. Deeply liked by domestic consumers, the export volume is also increasing day by day. The sales and purchase prices have been rising, and the breeding prospects and benefits are promising.
Freshwater lobsters are widely found in freshwater lakes, rivers, ponds, gutters, and rice fields. Benthic organisms, plankton, and all kinds of aquatic grasses are palatable foods that grow well in these waters. Juveniles live in shallow water or poolside, hi caves, and sometimes hidden in the hidden place of the gravel plants, the general shrimp hole dug in the large water surface of the shore more clay wetlands reedy beach shore zone, shrimp cave round , Tilt down, about 30 centimeters deep, and with different directions. Freshwater lobsters often experience seasonal movement in their habitat. In spring, the water temperature rises, and shrimps often move in shallow water. When the summer temperature is not high, they move to deep water. In winter, winter passes through the holes. Freshwater lobster clams, growth and breeding are also carried out in caves to prevent damage, and the shrimp is hilarious to light, crawling out of the cave when the light is weak or dark. During the rain season, freshwater lobsters often climb onto land. The shrimp also has a strong ability to fight hunger, the general hungry for 3 to 5 days; generally do not eat in the fall and winter season 20-30 days will not starve to death. The optimum temperature for ingestion is 25-30 °C; when the water temperature is below 15 °C, the movement is weakened; when the water temperature is below 10 °C or exceeds 35 °C, the feeding is obviously reduced; when the water temperature is below 8 °C, it enters the wintering period and ends feeding. The lifespan of freshwater lobster males is generally 20 months, and that of female prawn is 24 months.
Freshwater lobsters usually mating and holding eggs from the end of October to March of the following year. Different water mating times are different. Premature mating eggs are often immature, and when they are too late, the eggs are too mature and aging. The suitable water temperature for mating is 22-25 °C. It is best not to catch during the mating season, so that it can hatch and reproduce. Freshwater lobsters mate in spring, summer and autumn. They can lay eggs 3 to 4 times a year. Generally, 7 to 10 cm in length and 15 to 30 grams in weight, broodstock has a fertility of 220 to 270 grains, and individual size. Differently, there is a big gap between their susceptibility. Under normal conditions, the spawning shrimps after mating and spawning need 1-2 months of incubation (ie, embryonic development) and need to consume a lot of physical strength. Therefore, it is necessary to strengthen the nutrition and cultivation of oviposition shrimps. The suitable water temperature for hatching shrimps is 22-27°C, incubation time is 6-10 weeks. Before the shrimp culture, clear ponds need to be disinfected and filtrated into the water, and then organic fertilizers are applied to cultivate the natural food organisms for feeding the shrimp seedlings. The density of stocking larvae for general shrimp cultivation is 15-20 million. If it is cultivated with “soybean milk†method, the stocking density can be 16-18 million.
Crayfish farming skills? How to breed?
Crayfish cultivation techniques First, build a good lobster growth environment. The lobster is a shell and shell animal. Similar to crabs, it has a pair of specially developed chelators and has the habit of digging burrows. It is usually drilled near the shore at the water's edge. The lobsters are afraid of light, and when the light is weak or dark, they climb out of the cave. When the light is strong, they sink into the water or hide in the cave. According to the habit of lobsters, a 50 cm high anti-escape net can be added to the river pond to avoid lobster flight. At the same time, Hetang imitates the ecological environment of lobsters under natural conditions. The pool is shallowly planted with 10-15% of plants and hidden substances, and the environment for lobster inhabitation and shelling is built to reduce mutual killing.