Mixed breeding method for spotted maigre and large yellow croaker

Abstract

The invention relates to an artificial mixed breeding method for spotted maigre and large yellow croaker in marine aquaculture industry, and belongs to the technical field of marine culture. The breeding method includes the following steps, firstly pond-separated breeding maturation accelerating and parturition hastening of parent fish; secondly, same-pond breeding of spotted maigre and large yellow croaker fry; and thirdly, fry separating that's carried out through siphonage after the fry grows to be 2 to 3 cm in length. The pond-separated breeding maturation accelerating and parturition hastening of parent fish includes the maturation accelerating of the spotted maigre and the maturation accelerating of the large yellow croaker, and both the maturation accelerating of the spotted maigreand the maturation accelerating of the large yellow croaker include parent fish breeding and gonad maturation accelerating and parturition hastening. The same-pond breeding of spotted maigre and large yellow croaker fry includes same-pond hatching of the fertilized eggs of the spotted maigre and the large yellow croaker, prelarva prior period growing management, prelarva later perior growing management, postlarva period growing management and water quality regulation and control. 1.5 kg of fertilized eggs of the spotted maigre and the large yellow croaker are thrown into a mud pond of 32m<2>,and 696, 7000 juvenile fishes of 2 to 3 mm are bred at last, and the breeding rate per unit area is 2300 / m<2>, as a result, the utilization rate of the breeding pond is greatly improved and the breeding cost is reduced.

Description

Technical field [0001] The invention relates to a method for artificially mixed seedlings of yellow croaker and large yellow croaker in the marine aquaculture industry, and belongs to the technical field of agricultural marine aquaculture. Background technique [0002] Nibea albiflora (Nibea albiflora), commonly known as the yellow chicken, belongs to the order Perciformes, Toxodonidae, and the genus Nibea. Its body shape is similar to that of large yellow croaker. It is an offshore mid-lower fish, distributed in the South China Sea, East China Sea and Yellow Sea. In the south, it mainly inhabits the coastal waters with sandy and muddy bottoms. It feeds on benthic animals such as small crustaceans and small fishes. The suitable temperature range is 8℃~33℃. The optimum growth water temperature is 24℃~29℃. Sexual maturity. It is 2 weeks old, and the suitable salt range for growth is 10‰-40‰. Large yellow croaker (Pseud osciaena cocea), commonly known as yellow croaker, belongs to ...

AI Technical Summary

Problems solved by technology

However, due to the lack of systematic research, the seedling cultivation of yellow croaker and large yellow croaker mainly adopts the single-species cultivation method of conventional indoor cement ponds (or water tanks) or outdoor earthen ponds, that is, starting from fertilized eggs to a body length of 2-2. Up to 3 cm larvae, a certain fish is cultivated alone in the nursery water body. The disadvantages are that the bait utilization rate is low in the artificial nursery process, the emergence rate per unit water body is low, and the nursery cost is high.