How much is the price of herring fry now? How old can you grow in a year? What kind of food do you eat?

Herring is a kind of green fish, which is mainly distributed in the plain area south of the Yangtze River in China. it is one of the "four big domestic fish" in freshwater culture in China. So how much is the price of its fry? How old can you grow in a year? What kind of food would you like to eat? It is learned from Wuhan fishery market that the price of herring fry is generally about 0.1 to 0.5 yuan, which is mainly determined by fish fry specification, purchase quantity, variety quality and so on. The amount of herring stocking in the market depends on pond conditions and the level of feeding and management. Intensive fish ponds generally put 1500 million fish per mu and coarse fish ponds 500 million fish per mu. In actual production, reasonable mixed culture of multi-species and multi-specification fish species is often carried out to increase the yield per unit area.

How big can the herring fry grow in a year?

It has been learned from Uncle Wang, a black fish farmer in Wuhan, that black fish grow fast, with 2-3 winter ages up to 3-5 kg, the largest individual up to 70 kg, and common individuals weighing about 15-20 kg in the Yangtze River. The sexual maturity is 4-5 years old. It propagates in places with high flow velocity in the main stream of rivers from April to July. After reproduction, it is often fattened in rivers and lakes, and overwinters in deep water in winter.

The main results are as follows: 1. The first mature age of Yangtze River herring is 3-6 years old, usually 4-5 years old, and male fish 1-2 years earlier. Mature female fish are generally about 1 meter long and weigh about 15 kilograms. Mature males are generally about 900 mm long and weigh about 11 kg. The breeding season is from May to July. The general rise of rivers and rivers can stimulate them to lay eggs. The spawning activity is scattered and lasts for a long time.

2. Herring grows fastest among the "four big domestic fish". The growth of herring in Hukou, Jiangxi Province is the fastest at the age of 1 to 4 years old, and the average annual weight gain is more than 3.7 kg at the age of 5 to 6 years old. The average annual weight gain of male fish is about 1 kg less than that of female fish.

What kind of food do green fish fry eat?

Herring usually inhabit the middle and lower layers of water and feed mainly on snails, clams, etc., as well as shrimp and insect larvae. In the fry stage, it mainly feeds on zooplankton.

Attached: feed formula for herring

1. 40% hay powder, 30% silkworm chrysalis, 10% vegetable cake, 20% barley, and the feed coefficient is 3.

2. 40% of green hay, 30% of cotton cake, 10% of bean cake, 5% of rapeseed cake, 5% of silkworm pupa, 5% of fish meal, 5% of Yuanmai, and the feed coefficient was 3.

3. Bean cake 47.5%, fish meal 35%, yeast 1%, inorganic salt 16.5%, and the feed coefficient is 2.26.

4. Fish meal 10%, bean cake 24%, rapeseed cake 15%, wheat bran 15%, barley and corn 20%, gluten powder 6%, rapeseed phosphate 6%, the other 4%. Crude protein 29.44%. Breeding varieties and methods: mainly herring, mixed culture of silver carp, bighead carp, grass, regiment and so on. Feed coefficient 2.07.

5. Fish meal 5%, bean cake 35%, wheat bran 18%, corn 15%, soil surface 10%, yeast 5%, vegetable cake 10%, multidimensional 0.15%, inorganic salt 1%, soybean oil 1%. The crude protein is 27.4%. Breeding varieties and methods: mainly herring, mixed culture of silver carp, bighead carp and so on. Feed coefficient 2.51.

6. Fish meal 5%, silkworm pupa 5%, bean cake 14%, vegetable cake 43%, corn 10%, wheat bran 14%, inorganic salt 5%, fish oil 2%, lysine 0.5%, methionine 0.2%, multidimensional 0.3%, adhesive 1%. 30% crude protein. Breeding varieties and methods: mainly herring, mixed culture of silver carp, bighead carp, grass carp and so on. Feed coefficient 2.1-2.2.

7. Fish meal 6%, blood meal 2%, bean cake 12%, rapeseed cake 20%, cottonseed cake 20%, rice bran cake 6%, barley 15%, corn gluten meal 15%, premix additive 4%. Crude protein 31.7%. Breeding species and methods: pond culture is mainly herring, mixed culture of silver carp, bighead carp, grass carp and so on. Feed coefficient 2.4.

8. Fish meal 12%, silkworm pupa 8%, meat and bone meal 1%, bean cake 15%, cottonseed cake 10%, rapeseed cake 20%, wheat bran 10%, germ cake 10%, secondary powder 8%, premix 6%. Crude protein 32%. Breeding species and methods: pond culture is mainly herring, mixed culture of silver carp, bighead carp, grass carp and so on. Feed coefficient 2.2.

9. Bean cake 40%, rapeseed cake 30%, compound amino acid 5%, wheat bran 11%, mixed powder 10%, mineral 2%, salt 2%. Crude protein 30.7%. Breeding species and methods: pond culture is mainly herring, mixed culture of silver carp and bighead carp. Feed coefficient 2.1.