What bait do grouper like to eat? A detailed explanation of bait types

Grouper has delicious flesh and high nutritional value, and is an essential top-grade food fish for high-end banquets. It is one of the important farmed fish species in the coastal areas of our country. So, what bait do grouper like to eat?

1. What bait do grouper like to eat?

Newly stocked fry like bait consisting mainly of zooplankton, such as rotifers, water fleas, and so on. Once they grow to more than 2 cm, grouper like bait such as minced fish, earthworms, and maggots, and can additionally be fed artificial feed as a supplement. After they grow a bit larger, gradually increase the proportion of artificial compound feed until it is entirely artificial compound feed, with a daily feeding amount of about 20% of the fish body weight, fed 3 times a day.

2. What are the key points of grouper farming?

1. Seed selection

For broodstock, artificially farmed adult fish or adult fish caught from natural sea areas can be used. For female fish, choose those weighing 5 kg-8 kg with a distended and soft abdomen; for male fish, choose those weighing more than 8 kg from which semen can flow out when the abdomen is gently pressed. Match female and male broodstock at a ratio of 3:1-8:1, and keep or temporarily hold the grouper broodstock in indoor cement ponds. Through artificial intensive cultivation, with daily water changes and waste suction, the broodstock can naturally spawn and fertilize without hormone-induced spawning, and high-quality fertilized eggs can be obtained.

2. Daily management

Choose a reasonable density of cages and fish rafts to prevent accidents caused by lack of oxygen. During the farming process, in addition to feeding, frequently observe and check the fish's growth, feeding, activity, and body color, and also frequently check whether the cages are damaged and how much fouling organisms are attached. Regularly remove the fouling organisms attached to the cages to keep the water flow inside and outside the cages unobstructed, regularly monitor water quality, and protect the farming environment. Monitor the farming water according to the first-class seawater quality standard issued by the state, which is beneficial for the normal growth of grouper and the deliciousness of its flesh, and prevents accidents caused by water quality deterioration.

3. Bait feeding

Under normal circumstances, ponds should maintain some bait organisms such as rotifers and copepod nauplii for the fry to feed on. Check the density of biological bait in the pond water three times a day, in the morning, at noon, and in the afternoon. If the density of biological bait is found to be insufficient, an appropriate amount of biological bait such as rotifers and copepods can be supplemented to keep the pond's bait organisms abundant; if there is no biological bait, compound bait such as spirulina powder and shrimp flakes can be appropriately splashed on (used according to the size of the fry, filtered through 200-80 mesh silk bolting cloth before feeding) to reduce cannibalism among fry and improve the survival rate of fry. In the later stage of fry rearing, an appropriate amount of minced fish and shellfish meat can be added, or 0.15-0.3 ppm powdered compound feed can be fed directly. Check the bait density 2-3 times a day, and feed until the fry are satiated.

Grouper is expensive and has high economic value, and the prospects for artificial farming are quite good.