Differences Between Canned Sardines and Mackerel, Whether They Are Farmable Sea Fish, and Their Nutritional Value

Sardines are also called sand mullet, sand brain herring, big-belly herring, true herring, South American false sardine, and iwashi; they have blue backs and white bellies, fine flesh, and are mostly used to make canned food.So what is the difference between sardines and mackerel? Are they sea fish? Can they be artificially farmed? What is their nutritional value?

What is the difference between sardines and mackerel?

Mackerel has an average body length of 30 to 50 cm and a maximum lifespan of up to 11 years. It feeds on plankton and the eggs laid by sturgeon, cod, and herring.

Sardines are called sand dib fish in Hong Kong, China. The small ones are two cun long, and the large ones about one chi; the lower jaw is slightly longer than the upper jaw, and the teeth are not prominent.

Are sardines sea fish?

Sardines are sea fish.

Sardines are warm-water fish of coastal waters and are generally not found in the open sea or the ocean. They swim quickly and usually inhabit the middle and upper layers, but in autumn and winter, when the surface water temperature is lower, they inhabit deeper sea areas. The suitable temperature for most sardines is around 20-30°C, and only a few species have a lower suitable temperature, such as the Far Eastern false sardine, whose suitable temperature is 8-19°C. Sardines mainly feed on plankton, varying by fish species, sea area, and season, and adult fish and juvenile fish also differ. For example, adult golden small sardines mainly feed on planktonic crustaceans (including copepods, brachyuran larvae, amphipods, and mysids), and also feed on diatoms; juvenile fish, in addition to feeding on planktonic crustacean larvae[1], also eat diatoms and dinoflagellates. Golden small sardines generally do not make long-distance migrations; in autumn and winter, adult fish live in deep water beyond 70-80 m, and in spring, as coastal water temperatures rise, the fish schools make spawning migrations toward the shore.

Can sardines be artificially farmed?

1. Sardines are very difficult to raise and are generally not artificially farmed. Sardines are warm-water fish of coastal waters, very difficult to raise, lazy by nature, often crowding together and remaining motionless, with a very high mortality rate. They usually live in dense schools, migrate along the coast, feed on large amounts of plankton, and mainly spawn in spring; the eggs and the juveniles that hatch a few days later drift with the water until they metamorphose into free-swimming fish. The suitable temperature for most sardines is around 20-30°C, and only a few species have a lower suitable temperature, such as the Far Eastern false sardine, whose suitable temperature is 8-19°C. Fishing generally uses light purse seines, drift gill nets, large haul nets, and set nets, etc.

2. Sardines are deep-sea fish. Sardines usually inhabit the middle and upper layers; juvenile fish, in addition to feeding on planktonic crustacean larvae, also eat diatoms and dinoflagellates; in autumn and winter, adult fish live in deep water beyond 70-80 m, and in spring, as coastal water temperatures rise, the fish schools make spawning migrations toward the shore. After hatching, the fry and juveniles grow while feeding along the coast; in summer they gradually migrate north with the warm current of the South China Sea, and in autumn, as the surface water temperature drops, they migrate south. After October, when the fish have grown to more than 150 mm, they gradually shift to deeper sea areas because of the drop in coastal water temperature.

What is the nutritional value of sardines?

1. Sardines contain eicosapentaenoic acid, which can prevent cardiovascular disease. They also contain nucleic acid, taurine, selenium, and various other nutrients, and have very high medicinal value, making them a treasure in medicine. They can prevent thrombus formation and have a special effect on treating heart disease.

2. Sardines are rich in unsaturated fatty acids, which can reduce the risk of breast cancer.

3. Sardines have the effect of gradually lowering blood pressure and slowing the progression of atherosclerosis, and have a beneficial effect on promoting fetal brain development.

4. Five benefits of eating sardines: first, thinning the blood; second, helping dilate blood vessels; third, preventing the formation of potentially fatal blood clots; fourth, preventing high blood pressure and increases in fat mass; fifth, protecting the normal beating of the heart.