Obscure Oriental (hereinafter referred to as puffer fish) only after the domestication of food, it is easy to intensive, large-scale farming. During the feeding of compound feed, it is necessary to pay attention to some technical details and follow certain technical specifications in order to maximize the potential of puffer fish to achieve the goal of shortening the breeding cycle and listing in advance. This article is a summary of the feed feed technical requirements summarized through the production practice, in order to provide a reference for reasonable feeding, reduce the feed coefficient, and ultimately improve the breeding efficiency.
1. Ensure that the nutrient content of the feed is reasonable and stable. The pufferfish has the same ability to select the bait as other fish. Through the gastrointestinal dissection of wild individuals, the food composition is mainly benthic maggots, snails, shellfish, and shrimps and crabs, with a small amount of aquatic plants. In addition, the pufferfish has no obvious stomach, showing an inflated sac, long bowel. It is 2.35 to 2.74 times longer than the body length. These characteristics indicate that it belongs to the omnivorous nutrient type of partial meat. By adopting a protein gradient method using white fish meal as a protein source and using weight gain and protein efficiency as indexes, the experiment of puffer fish shows that the optimum protein requirement is 45-50%; the study also showed that puffer fish digests fat. The rate is higher than protein and carbohydrate, and the appropriate fat content in feed is about 11.5%. Therefore, it is necessary to timely test whether the formulated feed meets this basic requirement in terms of nutrition, and at the same time, it is necessary to ensure appropriate amounts of minerals and vitamins to prevent the occurrence of nutritional diseases. When the puffer fish feeds, first swim near the bait group, open the mouth and bite the food. After identifying and tasting the food in the mouth, swallow it and then ingest the second mouth. If the feed ingredients change too much or the taste is not correct, the bite under the bait feeds. After taste does not swallow, it may spit out. It is sometimes seen that many small pieces of bait are floating on the surface of the water, which means that the puffer fish has vomiting. Therefore, it is necessary to maintain the stability of feed ingredients and the palatability of bait preparation for the normal feeding of pufferfish.
2. Timely regulation of daily food intake, feeding rate, and daily food consumption of feeding rhythm fish, also known as satiety, increased linearly or exponentially with weight gain, whereas feeding rates decreased exponentially with growth. This is due to the fact that in the juvenile stage, the metabolism is strong and the growth is fast. Compared with the fish itself, it requires more nutrition, the growth of the fish gradually decreases, and the required nutrition and food are correspondingly reduced. Therefore, in the breeding of pufferfish, the bait rate will gradually decrease with the growth of the fish, and it is necessary to accurately calculate the dynamic feeding rate of farmed fish, to avoid excessive feeding of bait and waste of feed water to spoil the water quality.
The feeding behavior of fish has a certain rhythm. This phenomenon is confirmed by many scholars and therefore has many different classifications. Studies have shown that puffer fish feeding has a clear rhythm, is a type of morning and dusk feeding, but after feeding the compound feed, using regular, fixed-point feeding methods will form a corresponding feeding rhythm. When the feeding time arrives, most of the puffer fish will normally swim to the bait station and roam around, waiting to feed the bait. Therefore, strengthening the feeding rhythm of puffer fish is of great significance to stimulate the appetite of puffer fish and promote digestion.
3. Proper feeding times The number of feedings refers to the number of feedings after the puffer fish's daily food intake is determined. There is only a small inflatable bladder between the puffer fish's esophagus and the intestine, and most of the feed intake is directly digested into the intestines. Therefore, the amount of food that can be contained at one time is far less than that of stomach fish. Therefore, using multiple feedings can increase the amount of food. Digestion and absorption rate and feed efficiency, generally 3 to 5 times daily feeding, but also take continuous feeding methods.
4. Fully consider the environmental factors that affect the feeding of puffer fish. The pufferfish is a freshwater aquaculture species. Factors such as water temperature, dissolved oxygen, and water quality are the main environmental factors that affect the feeding habits of small porpoises. Fish are warm-water animals, and water temperature has a greater impact on food intake. The food intake of puffer fish increased with the increase of water temperature in the temperature range of 18-28°C. In order to meet the nutritional needs of pufferfish, the bait rate should be determined according to different water temperatures. In most cases, the amount of dissolved oxygen in water is a limiting factor for the normal growth of aquatic animals. The pufferfish is a kind of hibernating fish, with high dissolved oxygen, a strong puffer fish, high digestibility and feed efficiency, and low dissolved oxygen. Loss of appetite and drastic decline in food intake. In addition, the quality of water quality, the degree of disturbance in the surrounding environment, etc., have all contributed to the fixation of the puffer fish. Therefore, optimal control of the aquaculture water and the surrounding environment in order to ensure the best feeding status of puffer fish.
In actual feeding, the factors affecting the feeding of puffer fish should be fully considered and the amount of feeding should be appropriately adjusted. In addition, the stress response is also an important factor in inhibiting the feeding of turtles, and the resulting adrenaline can inhibit gastrointestinal motility and inhibit blood flow into the viscera, resulting in decreased digestion rate. For the prevention of stress response, it is mainly to reduce various stimuli or reduce the stimulating intensity and create a quiet, stable and comfortable breeding environment for puffer fish.
5, to avoid the emergence of hierarchical feeding patterns in the breeding of puffer fish, due to the results of intra-specific competition, the individual size will appear to differentiate, the dominant behavior of large and active individuals will lead to the weak individual's nervous state and insufficiency, ingestion activity The leveling, the so-called hierarchical bait pattern, is more serious in pufferfish with similar disability. This kind of tension not only leads to insufficient intake of baits, but also causes a series of physiological and biochemical dysfunctions with more serious consequences. Therefore, when the size of the individual appears - the difference can be appropriately graded to reduce the size difference between individuals to avoid the emergence of a graded bait mode; at the same time, increase the bait feeding point, in the long-day period, increase the number of feeding baits, ensure that Small individuals also have the opportunity to ingest enough food.
ETR Oxygen Cylinder Filling System
By PSA principles, ETR PSA oxygen generators generate 93%±2% purity oxygen gas directly from compressed air. ETR oxygen cylinder filling plant is consisted of Atlas Copco air compressor, Parker dryer and filters, air buffer tank, ETR Psa Oxygen Generator, oxygen buffer tank, oxygen receiver tank, diaphragm oxygen booster, filling station and control cabinet.
Compressed air is purified through the air dryer and filters to a certain level for main generator to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The generator produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±2% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure, then reach to 150bar to filling cylinders with an oxygen booster.
Oxygen Cylinder Filling System
Oxygen Cylinder Filling System,Homefill Oxygen System,Oxygen Refilling Plant,Oxygen Refilling Station
Hunan Eter Electronic Medical Project Stock Co., Ltd. , https://www.centralgas.be