High-efficient method for cultivating fry of turbot family

Abstract

An efficient cultivation method of a turbot family offspring comprises the following steps: parent fish selection, parent fish cultivation, artificial directional mating, hatching, offspring cultivation and getting of commercial offsprings. The parent fish is selected from germplasm parent fish of different batches from different countries; artificial fertilization is performed among different germplasm parent fish, and the same batch of the parent fish are not allowed to mate with each other; offspring cultivation is as follows: at the early period, the adopted facility is a 3m glass reinforced plastics barrel, and bait comprises chlorella, rotifer and artemia; at the middle period, the adopted facility is a 10m cement pond, and the bait is micro pellet bait; at the later period, the adopted facility is a 20-30m cement pond, and the bait is fish larvae pellet bait; and specification of the commercial offsprings is 5-6cm. The method is characterized by adopting the parent fish with different germplasm resources for the artificial directional mating, and seriously controlling inbreeding; and adopting different culturing facilities to cultivate the offspring by three stages, which causes the offspring emergence rate of the commercial offspring to reach 46.8%, and improves growth rate thereof by 36%, and lowers of etiolation rate thereof below 5%. The method can efficiently produce high-quality turbot offsprings, and is applicable to large-scale production.

Description

Technical field: [0001] The invention belongs to the production technology of turbot seed breeding, and is a technical method for cultivating seedlings with high efficiency and high quality in the large-scale production of turbot seedlings. Background technique: [0002] Turbot (Scophthalmus maximus L.) is a flounder endemic to the northeastern Atlantic Ocean, off the coast of Europe. my country first introduced turbot seedlings from the UK in 1992, and has achieved a series of important research results in domestication, rearing, broodstock breeding, seedling production, nutritional feed, disease control, and basic research. For example: "Biological Characteristics and Key Technologies of Seed Production of Turbot" by Men Qiang and Lei Jilin of Yellow Sea Fisheries Research Institute of Chinese Academy of Fishery Sciences (Marine Science / 2004 / Volume 28 / Period 3), Sun Zhongzhi of the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences "Experim...

AI Technical Summary

Problems solved by technology

Because the broodstock used in the production of turbot seedlings is usually not scientifically selected, coupled with the repeated generations of breeding and inbreeding, the germplasm degradation of the offspring seedlings is relatively serious, and the hatching rate, emergence rate, and growth rate have decreased. Degradation of traits such as slowness and poor stress resistance

At present, in the production of turbot seedlings, there is no research report on the use of inbreeding control technology for the large-scale efficient production of turbot family seedlings