Catalog
1. Habits
2. Morphological Characteristics
3. Distribution Range
4. Artificial Propagation
5. Nutritional Value
Habits
Widespread Salinity
Shallow seas, estuaries, and saline gullies ranging from 35% highly saline seawater to 5% fresh water, Inland brackish lakes, freshwater lakes, large and small ponds pike can live. The substrate is not restricted, not only can live in the plains waters, but also can grow in the waters of Gao Xia at an altitude of 1470 meters.
Wide temperature
From 0-35 ℃ range of water temperature can be tolerated, to 18-28 ℃ for the optimal growth temperature. However, the adaptation of the pike to changes in water temperature needs to be gradually become frustrated. Thirsty conditions in order to adapt, if the temperature suddenly rise and fall in a short period of time, it will cause death.
PH value
The optimum pH value for barracuda is 7.6-8.5, and it can be adapted to hard water with a total alkalinity of 213.8 milligrams in a range of about 7.6-9.3.
Dissolved Oxygen
Barracuda has a greater ecological tolerance to oxygen, and its oxygen consumption increases with the size of the individual. When the dissolved oxygen content in the water is 5.1 to 8.4 milligrams" coax, it is the most favorable for growth.
Morphological Characteristics
The barracuda fish, body fusiform, elongated, short and broad head, with large scales. Lipid eyelids are poorly developed, covering only the margins of the eyes. Body covered with round scales. The dorsal side is greenish gray, the ventral side is light gray, and the scales on both sides have black vertical lines. It is an offshore fish, preferring to inhabit the estuaries and bays, but also entering freshwater. Sex lively, good jumping, in the countercurrent often in groups of anadromous, eat the organic matter in the mud underwater. Larger, China produced in the South China Sea, the East China Sea, the Yellow Sea and the Bohai Sea.
Distribution range
Offshore fish, preferring to inhabit the mouths of rivers and bays, but also into the freshwater. It is active, likes to jump, and often swims in groups in countercurrents, eating organic matter in the mud under the water. Large in size, China in the South China Sea and the East China Sea and the Yellow Sea, Bohai Sea.
Happy to inhabit in the junction of fresh and salt water, into the estuary and harbor, for one of the harbor fish. The barracuda group mainly inhabits in estuaries and harbors, and has the habit of entering freshwater along rivers to feed, and has obvious tendency to light and tendency to flow.
Artificial Breeding
Artificial breeding with the parent fish to the male fish more than 3 years old, the female fish more than 4 years old is good. Appropriately selected individuals weighing 0.5 to 1 kilograms, the parent fish required to be in good health, no injuries and no disease. Parent fish should be selected and retained in the fall when adult fish are caught. Before the stocking of parents, the bottom of the pool should be cleared of excessive silt and wild fish. Stock 50 to 80 fish per mu. Cultivation of the pool should be appropriate application of organic fertilizers, to maintain a certain degree of water fertility, transparency of 25 cm or so, and at the same time need to feed a variety of concentrate feed, to ensure that the parents of the fish have sufficient nutrients.
The salinity of the pond is generally about 10. Barracuda raised in freshwater or in low salinity water below 3 must undergo a salt water transition before spawning. During the spring intensive cultivation period, the pool must be regularly refilled with fresh seawater, which is conducive to the gonadal development of the parent fish.
The male fish is selected to have thick milky white semen flowing out of the abdomen near the genital pore when lightly pressed. The female fish should be chosen to have an enlarged, soft and elastic abdomen, and a slightly protruding reddish genital pore. And use the egg collector inserted into the genital pore from the ovary to take eggs for visual and microscopic observation, such as eggs were beige, full and glossy and surrounded by a semi-transparent circle, the egg diameter of 0.60 mm or more, the adhesion between the egg particles is loose, put into the water can be dispersed by stirring, can be selected as a catalytic parental fish. The ratio of male to female of the spawning parent fish is generally 1:1.5, if the male fish is less mature, the ratio can be increased appropriately.
Oxytocics are carp, pike pituitary, 15-30 mg per kg body weight dose; or chorionic gonadotropin 3500-3000 international units; or luteinizing hormone-releasing hormone analog 100-300 micrograms. Used alone or in combination, one or two injections are usually used. Mature eggs, observed under the microscope as round and full, crystal clear, with 1 oil ball, mature semen on 1 drop of seawater, observed under the microscope, spermatozoa dramatically scurrying swim in good quality, you can squeeze the eggs, sperm for artificial insemination.
Fertilized eggs in salinity below 10 for sinking, in about 13 for semi-floating, above 15 for floating. Therefore, the salinity of static water incubation should be above 15, and the salinity of running water incubation should be 7-13, pH 7-9, and the water temperature should be 14-240 C. The incubation time is usually 35-56 hours.
Nutritional value
Medicinal value
Nature: flat
Flavor: sweet
Calorie: 103.00 kcal (430 kJ)/100g
Effectiveness: cardiovascular benefit. Rich in unsaturated fatty acids, good for blood circulation, good food for cardiovascular patients.
Cardiac protection: Protects the heart, protects heart muscle cells, prevents or relieves palpitations and heart rate disorders.
Consumption of contraindications: seafood allergy is prohibited.