It has no effect on myopia. Fish gallbladder and fish liver are rich in vitamin A. Vitamin A has a variety of physiological functions and is beneficial to vision, growth, epithelial tissue and bone development, sperm production and fetal development. It is necessary for growth and development. Moreover, for expectant mothers, the need for vitamin A has increased by nearly 25% compared with before pregnancy. The concentration of vitamin A in maternal blood decreases in the early stages of pregnancy, increases in the late stages of pregnancy, decreases during labor, and increases again after delivery, so vitamin A should be supplemented appropriately. It is necessary for expectant mothers. ?

Grouper generally refers to fish of various genera in the grouper subfamily of the family Perciformidae. Groupers belong to the class of ray-finned fishes. They have thick bodies and large mouths and are not suitable for swimming quickly over long distances. Groupers are quite large, reaching more than one meter in length and weighing more than 100 kilograms. However, there are many types of groupers, and their sizes vary.

1 Distribution area

Groupers found in offshore waters are species widely distributed in the Indian and Pacific Oceans. There are 31 species of grouper in China, with 30 species in the South China Sea, 12 species in the East China Sea, and only 1 species in the Yellow and Bohai Seas.

Amount of resources: The islands along the coast of the South China Sea and the East China Sea have good habitats, which are conducive to their reproduction and growth. However, due to overfishing pressure in recent years, fish bodies have become smaller year by year, and the annual catch per unit of fishing has declined year by year, now only dozens of tons.

Endangered level and rare

2 Detailed introduction

Morphological characteristics

Grouper is a kind of perch, distributed in tropical and temperate regions Most of the sea areas are rocky or coral reef areas in the tropics. The head is larger than other fish, and most species are large species. They usually live alone in caves or coral reefs. Compared with other tropical fish, the body color is less bright and is almost the same as the color of the surrounding rocks. The order Perch, including groupers, is the most diverse order of fish. Grouper is commonly known as grouper and fish in Guangdong, while it is commonly known as bighead carp and national fish in Fujian and Zhejiang. There are many kinds of grouper, with about 100 species around the world, and more than 30 species recorded along the coast of my country.

Life habits

Groupers are reef fish. Natural species inhabit coastal rocks, undulating and gravelly sea areas, coral reefs, shipwrecks or artificial reefs and other waters. Grouper is a typical predatory carnivorous fish. It relies on its sensitive vision and ability to detect light and color. It often preys ferociously on fish, shrimps, crabs, octopus, even barnacles and other marine organisms. It is particularly fond of Live animals.

Nutritional and economic value

The unique natural ecological environment and living habits of grouper make it rich in nutrients, tender in texture and delicious in taste. According to relevant information and experts, the protein content in grouper meat is higher than that of ordinary fish. In addition to various amino acids necessary for the human body, it also contains inorganic salts, iron, calcium, phosphorus, vitamins and other nutrients necessary for the human body. It has become a fish with high economic value in one fell swoop. It is a delicacy at banquets and is a popular seafood product in Hong Kong, Macao and Taiwan. Fishermen choose palatable shrimps, octopus, lugworms, etc. as bait based on the sea conditions, living habits and different seasons where it lives. They have harvested abundantly, and once made a profit of 30,000 yuan in a single trip. With the continuous changes in aquatic resources and the increasing market demand, the artificial breeding of grouper has developed rapidly. In Lieyu Bay, Nan'ao County, grouper breeding has formed a base. The main species include red-spotted grouper, Blue grouper and salmon spot grouper, etc.

Artificial breeding of grouper is a highly technical commercial production. Over the years, scientific researchers, breeding technicians and farmers in Nan'ao County have worked closely together. Through practical exploration, technological breakthroughs have been made in production management, color disease prevention and other aspects, and the Spark Series books "Grouper Breeding Technology" and "Grouper" have been compiled and published "Practical Technology for Fish Cage Breeding" and other books and periodicals articles. Nan'ao County's grouper sea cage culture results have won the second prize of the National Agriculture, Animal Husbandry and Fisheries "Harvest Award", the first prize of the Guangdong Province Fisheries "Harvest Plan" and the "Spark Plan Award".

3 Nutritional analysis

1. Grouper has high protein content and low fat content. In addition to amino acids necessary for human metabolism, it is also rich in a variety of inorganic salts and Iron, calcium, phosphorus and various vitamins;

2. The nutritional content of fish skin colloid plays an important role in enhancing the complete growth of epithelial tissue and promoting the synthesis of collagen cells. It is known as one of the best in beauty and skin care. fish. Especially suitable for women after childbirth. It tastes delicious and is a great addition to the table.