A kind of method for indoor seedling cultivation of naked starworm

Abstract

The invention discloses a method for cultivating larvae of sipunculus nudus indoors. The method mainly comprises the steps of parent selection, spawn induction, larval cultivation, nyad cultivation and the like. Compared with the prior art, the method has the beneficial effects that (1) the emission ratio and synchronicity of parent sperms and eggs can be improved by using a 5-hydroxytryptamine solution immersion and drying-in-the-shade stimulation combined induction method; (2) algae are fed when individual pelagospheric larvae start to hatch, so that the survival rate of pelagospheric larvae can be increased; (3) water is not changed in the process of cultivating larvae, and the water quality is controlled by reasonably controlling the larval density and the bait amount; (4) benthic diatom is cultivated in a larval pool in advance, sufficient nutrition is provided to larvae which are just attached, and the metamorphosis survival rate and growth rate of larvae can be increased; and (5) larval baits are subjected to superfine grinding, so that digestion of larvae can be benefited. The method can be used for improving the yield of the larvae so as to increase the economic benefit, and has the advantages of simple operation, easy popularization and the like.

Description

technical field [0001] The invention relates to aquaculture technology, more specifically, to a method for cultivating indoor seedlings of the naked star worm. Background technique [0002] naked starworm ( Sipunculus nudus ) is a common species in the phylum Astrozoa, living in caves in the intertidal zone, and is an important regional marine treasure. Affected by the rising market price, the fishing intensity of the naked star worm is increasing day by day, coupled with the change of the marine environment and the destruction of the tidal flats, the resources of the naked star worm have decreased significantly. At present, Beihai, Zhanjiang and other places have carried out asterworm breeding to varying degrees, but the source of seedlings still mainly depends on wild populations caught. The yield and quality of seedlings are very unstable and cause serious damage to natural resources. According to statistics, the suitable aquaculture area of ​​the naked starworm in Guan...

AI Technical Summary

Problems solved by technology

[0003] Cultivation of starworm seedlings mainly includes outdoor earthen pond cultivation and indoor cement pond cultivation, of which the indoor cement pond cultivation technology mainly involves parental cultivation, larvae cultivation and seedling cultivation; compared with outdoor earthen pond cultivation, indoor cement pond cultivation is mainly through control In terms of parental maturation promotion, larvae density, bait and breeding management, etc., the growth rate, survival rate and metamorphosis rate of larvae are improved, thereby improving seed production and economic benefits. However, there are defects of low yield and short cultivation time