Methods of Artificial Seedling and Field Breeding of Nereis verrucosus

Abstract

The invention discloses a method for artificial seedling cultivation and field cultivation of clam worm, which belongs to the technical field of aquaculture. The artificial breeding method selects female and male worms with a quantitative ratio of 100:3 as parents, and directly obtains fertilization by squeezing and bursting eggs, fertilized eggs are desalinated and put in the field for hatching. By controlling the seedling density of the grass worms in the field to 450‑550 / ㎡, spraying shell powder during the breeding period makes the grass worms grow in the field. Breeding in field. The method provided by the invention fills the blank of field breeding of grass insects, the selection of parents is simple and fast, the larvae can be hatched directly in the field, and can ingest phytoplankton and organic debris in the field, without feeding separately, which greatly reduces the It reduces the cost of breeding, realizes the symbiosis of grass insects and cultured plants in the field, can improve the utilization rate of the field, and increase the economic output value per unit area. The method is simple and suitable for promotion among ordinary farmers.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to an artificial seedling raising and field culture method of Nereus verruca. Background technique [0002] Tylorrhynchusheterochaetus, commonly known as grass worms, belongs to the phylum of Annelids, Polychaetes, Wandering orders, Nereaceae, and the genus Tylorrhynchusheterochaetus. The living environment of grass worms is usually the coastal, estuary fields and shoal silt and sandy soil where brackish and fresh water meet. It is an omnivorous animal. The soma has 62 segments, dioecious, and allograft fertilization. The male and female worms have different body colors. The male body is mainly red, with milky white in between, and the female body is turquoise or brownish green. In autumn and winter, when the tide rises and floods rice fields and shoals, mature individuals climb out of the water to swim and mate to breed. Mature individual grass worms are commerci...

AI Technical Summary

Problems solved by technology

However, the current research is mainly focused on the cultivation of grass insects under intensive conditions (artificial ponds) or tidal flats, and different breeding conditions will significantly affect the breeding effect of grass insects due to different factors such as environment and bait, and cannot be directly used. Or apply mechanically, so it is necessary to provide a method for cultivating grass worms in the field