TW201713208A - Seawater cultivation method of sturgeon fish capable of removing earthy taste in sturgeon fish, increasing fresh sweetness of sturgeon fish meat, and reducing parasitism problem of parasites - Google Patents

Abstract

This invention provides a seawater cultivation method of sturgeon fish, which includes: providing a water tank; pouring water into the water tank, controlling the water temperature being between 4 DEG C to 18 DEG C, and placing the sturgeon fish; adding 2 per mil in weight of salt daily and lasting for 16 days to make the salinity of water reaching 32 per mil; and, continuously cultivating the sturgeon fish for at least 30 days while simulating the daily natural sunshine time having 10 to 14 hours of daytime and 14 to 10 hours of nighttime. The seawater cultivation method of sturgeon fish according to this invention not only can remove the earthy taste of freshwater fish in the sturgeon fish, but also increase the fresh sweetness of sturgeon fish meat and reduce the parasitism problem of parasites.

Description

Method for breeding seawater arowana

The invention relates to a method for breeding a dragon fish, in particular to a method for breeding a sea aquarium.

Taiwan and other countries in the world such as China, Germany, Russia, the United States, Italy or France use freshwater (eg spring water or groundwater) to raise arowana fish. Arowana must be cultured at a water temperature below 25oC. If the water temperature is too high, the dragonfish will die. Although the arowana fish is regarded as the top dish, it is still safe and hygienic when it is cooked because of the use of freshwater aquaculture, so there is still earthworm (trimethylamine) and there are many parasites in the body. doubt.

Although the arowana is classified as a freshwater fish, 95% of the world's wild dragonfish are found in the Caspian Sea at the junction of Europe and Asia, while the Caspian Sea is a standard saltwater lake. The South Caspian Sea has a salinity of about 35 ‰, the North Caspian Sea has a salinity of about 5 ,, and the average salinity is 12 ‰. Therefore, the scorpionfish should be a saltwater fish. However, because the offshore waters are polluted by the development industry and the sea temperature is too high in summer, it is not possible to directly access marine aquaculture fish.

In view of this, how to improve the freshwater culture of freshwater aquaculture fish while solving the problem of soil odor and parasites, the existing technology needs to be improved.

In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a method for breeding anchovy fish by adding 2 parts by weight of salt per day (i.e., salinity is 2 parts per thousand) to the 16th day. Seawater aquaculture, in order to remove the taste of the arowana, reduce parasitic parasites, and increase the sweetness of the meat of the dragonfish.

In order to achieve the above object, the technical means adopted by the present invention is to provide a method for breeding a seawatered arowana fish, comprising: providing a water tank; injecting water into the water tank, and controlling the water temperature to be between 4oC and 18oC, and Add the dragonfish; add 2% by weight of salt per day, continue to add for 16 days, so that the salinity of the water reaches 32‰; keep the dragonfish for at least 30 days, of which 10 hours per day. 14 hours of daylight and a natural night sunshine time of 14 hours to 10 hours.

The "salt" as used in the present invention generally refers to a single salt and a combined salt. The single salt is divided into a normal salt, an acid salt, a basic salt, and the salt is divided into a double salt and a wrong salt; wherein the acid salt contains a metal ion and an acid ion. It also contains hydrogen ions. The basic salt contains hydroxide ions in addition to metal ions and acid ions. When the double salt is dissolved in water, it can form a salt of the same ion as the original salt. When the salt is dissolved in water, it can be formed. A complex salt-complex of a complex ion that is different from the original salt. The dissolved substances in seawater are mostly brought by rivers and appear in the form of ions in water. Therefore, the salts contained in seawater are mainly composed of a variety of ions, including but not limited to chlorine, sodium, sulfate, Magnesium, calcium, potassium ions or a combination thereof.

Preferably, the water temperature is between 14oC and 18oC.

Preferably, the dragon fish has a weight of between 5 kg and 10 kg per tail, and a total of 500 kg is cultured in 10,000 liters of water.

Preferably, the sunshine hours are 12 hours of daylight and 12 hours of night.

Preferably, in the step of adding 2 ‰ by weight of the salt per day, each metric ton of water further comprises 50 to 100 grams of vitamin B group, 3 to 5 grams of lead cadmium and chromium, and 0.5 gram of iodine. Up to 1 gram, 10 to 20 grams of calcium gluconate, 20 to 30 grams of glucose, 20 to 30 grams of sucrose, 20 to 30 grams of lactose, 5 to 10 grams of citric acid, 150 to 200 grams of nutrient or A combination thereof; wherein the nutrient comprises an electrolyte, bicarbonate, lactulose or a combination thereof.

More preferably, each metric ton of water further comprises 50 grams of added vitamin B group, 1 gram of lead, 1 gram of cadmium, 1 gram of chromium, 0.5 gram of iodine, 10 grams of calcium gluconate, 20 grams of glucose, 20 grams of sucrose, 20 grams of lactose, 5 grams of citric acid, 150 grams of nutrient, or a combination thereof.

The "salinity" as used in the present invention means the concentration by weight of a salt, and the unit thereof is one thousandth (‰).

The term "electrolyte" as used in the present invention refers to a compound which is soluble in water to generate free ions and is electrically conductive, and includes most soluble salts, acids and bases.

The invention has the advantages that the method for breeding the seawater-grown arowana fish of the invention not only can remove the earthy smell of the arowana fish, but also can increase the sweetness of the meat of the dragonfish and reduce the parasitic parasitic problem.

The technical means adopted by the present invention for achieving the object are further explained below in conjunction with the drawings and the preferred embodiments of the present invention.

Preparation example

Step 1: providing a water tank, preferably an indoor culture circulating equipment, which is a prior art; by introducing the spring water into the water tank, the circulating main pump continuously circulates the water, and the ice water circulation pump and the ice water machine maintain the water temperature. The defoaming machine, protein defoaming machine, ultraviolet sterilizer, biochemical filter tank and sand filter barrel are used to maintain the clean water quality in the water tank, and the oxygen content of the water in the water tank is given by the air pump and the electric air pump to illuminate. The equipment adjusts the length of day and night.

Step 2: Add 10,000 liters of spring water in the water tank and control the water temperature between 4oC and 18oC, preferably between 14oC and 18oC, to reduce the physiological activity of the dragonfish, and then put it into 5kg to 10kg per tail. A total of 500 kilograms of dragon fish developed in fresh water.

Step 3: Add Australian salt by the rate of 2 ‰ salinity per day; vitamin B group 50 g / metric ton to 100 g / metric ton, preferably 50 g / metric ton (purchased from Yongxin Pharmaceutical); trace elements (lead , cadmium, chromium total 3 g / metric ton to 5 g / metric ton, preferably lead, cadmium, chromium a total of 3 g / metric ton, more preferably lead, cadmium, chromium 1 g / metric ton; iodine 0.5 g / metric ton to 1 Kg/metric ton, preferably 0.5 g/metric ton; calcium gluconate 10 g/metric ton to 20 g/metric ton, preferably 10 g/metric ton; glucose 20 g/metric ton to 30 g/metric ton, preferably 20 gram / metric ton; sucrose 20 g / metric ton to 30 g / metric ton, preferably 20 g / metric ton; lactose 20 g / metric ton to 30 g / metric ton, preferably 20 g / metric ton; citric acid 5 g / metric ton to 10 g / metric ton, preferably 5 grams / metric ton; nutrient 150 grams / metric ton to 200 grams / metric ton, preferably 150 grams / metric ton [named serumsal, purchased from Genchem Biotechnology Co., mainly containing electrolytes (sodium, potassium, Chlorine, bicarbonate and disaccharide Ledo (lactose)]; seawater salinity (32‰) can be achieved after 16 days of water in the water tank, and this concentration is maintained until the 30th day (as shown in Figure 1). .

Step 4: Continue to culture the dragon fish for at least the 30th day, in which 10 hours to 14 hours per day is given with 14 hours to 10 hours of dark nights to simulate natural sunshine hours, preferably 12 hours per day and 12 hours of darkness per day. . After that, the dragonfish can be taken out for processing and ripening, and the seawater dragon fish steak can be completed by vacuuming and freezing.

Marine fish is rich in amino acids and is the basic unit of protein, while amino acids are also responsible for the osmotic pressure against seawater. The salinity of seawater is 32‰, while the animal cells have only 10‰ of minerals. In order to make up for the difference in salt, marine organisms must be especially rich in amino acids. The amino acids in marine fish are mainly glycine and bran. Amino acid. When humans eat lobsters and crustaceans, the sweet taste of the tongue taste buds comes from glycine, which is an excitatory neurotransmitter that helps to think and remember, and glutamic acid is the tongue of human tongue. Come to the taste of umami. Therefore, marine fish must produce synthetic amino acids to adapt to seawater salinity, which is also the reason why seawater fish are more sweet than freshwater fish. The arowana fish cultured through the preparation example are rich in glycine and glutamic acid.

In addition, trimethylamine is a source of fishy astringency. The trimethylamine in the body of the arowana cultured in the preparation example is also removed at the same time.

Example 1 Changes in body weight of Arowana before and after seawatering

In order to avoid water pollution, the arowana fish cultured in the preparation example is not fed with feed, but vitamin B group and other nutrient sources are added. Referring to Figure 2, the nutrient source and electrolyte concentration of the tank (that is, the substances added in step 3 of the preparation example) are maintained at a concentration of 120 ppm for 30 days of domestication, while the total weight of the arowana fish before seawater acclimation is about 500. In kilograms, after 30 days of domestication, the total weight of the arowana is about 475 kg. Therefore, the arowana does not lose too much weight during the domestication of seawater.

In the process of seawatering arowana fish on the 30th, natural sunshine hours must be simulated to reduce the urgent response of the dragonfish. Therefore, the seawaterized dragonfish not only has a sweet and fresh flavor, but also has a delicate and delicate fleshy taste. The astringent taste of freshwater fish completely disappears, and it is not easy to have parasitic parasites. Even after cryopreservation, it does not lose its original flavor and is suitable for making sashimi. Edible, can help improve the quality and safety of the dragon fish.

It is apparent to those skilled in the art that various modifications and variations can be made without departing from the scope and spirit of the invention. Although the present invention has been described in terms of specific preferred embodiments, it should be understood that the invention should not be In fact, the various modifications that are apparent to those skilled in the art are also contemplated by the scope of the invention.

Fig. 1 is a line drawing of the breeding days (days) and the salinity of the water tank of the method for breeding a seawaterized arowana fish of the present invention. 2 is a line drawing showing the number of days (days) and changes in nutrient source and electrolyte concentration of the culture method of the seawaterized arowana fish of the present invention; ppm (parts per million) is an abbreviation for parts per million.

Claims (6)

A method for aquaculture of arowana arowana, comprising: providing a water tank; injecting water into the water tank, controlling the water temperature between 4oC and 18oC, and placing the dragon fish; adding 2 centimeters per day to a concentration of Salt, continue to add for 16 days, so that the salinity of the water reaches 32‰; the arowana is continuously cultured for at least 30 days, of which 10 to 14 hours of daytime is given daily and with 14 hours to 10 hours of dark night simulation of natural sunshine. Hours. The method for breeding a seawatered arowana fish according to claim 1, wherein the water temperature is between 14oC and 18oC. The method for breeding a seawater-resistant arowana fish according to claim 1, wherein the dragonfish is 5 kg to 10 kg per tail, and a total of 500 kg is cultured in 10,000 liters of water. The method for breeding a seawater-resistant arowana fish according to claim 1, wherein the sunshine hours are 12 hours of daylight and 12 hours of night. The method for breeding a seawatered arowana fish according to any one of claims 1 to 4, wherein in the step of adding a salt of a concentration of 2 parts by weight per day, each metric ton of water further comprises adding 50 grams of the vitamin B group to 100 grams, lead cadmium chromium total 3 grams to 5 grams, iodine 0.5 grams to 1 gram, calcium gluconate 10 grams to 20 grams, glucose 20 grams to 30 grams, sucrose 20 grams to 30 grams, lactose 20 grams to 30 grams, 5 grams to 10 grams of citric acid, 150 grams to 200 grams of nutrient, or a combination thereof; wherein the nutrient comprises an electrolyte, bicarbonate, lactulose or a combination thereof. The method for breeding a seawater-resistant arowana fish according to claim 5, wherein each metric ton of water further comprises 50 g of vitamin B group, 1 g of lead, 1 g of cadmium, 1 g of chromium, 0.5 g of iodine, and 10 g of calcium gluconate. G, 20 grams of glucose, 20 grams of sucrose, 20 grams of lactose, 5 grams of citric acid, 150 grams of nutrient, or a combination thereof.