阅读说明：本技术 一种疣吻沙蚕苗种的科学放流方法 (Scientific releasing method for young fry of Orychophragmus warts ) 是由 周洪磊 陈度煌 何国森 王茂元 兰昌花 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种疣吻沙蚕苗种的科学放流方法,包括如下步骤：(1)放流选址；(2)放流苗种来源与规格；(3)放流苗种健康检查；(4)放流时机；(5)放流苗种计数方法；(6)苗种运输与放流；(7)苗种效果评估。本发明符合疣吻沙蚕苗种生物学、生理生态习性,操作方法简单、合理、科学,有效恢复疣吻沙蚕种群数量,发挥出更大的经济、社会和生态效益。(The invention relates to a scientific releasing method of young fry of Orychophragmus rhynchophyllus, which comprises the following steps: (1) releasing and selecting addresses; (2) releasing the source and specification of the seedlings; (3) releasing offspring seed health examination; (4) releasing time; (5) a releasing offspring seed counting method; (6) transporting and releasing seedlings; (7) and (5) evaluating the effect of the seedlings. The method conforms to the biological, physiological and ecological habits of the young mollusk, has simple, reasonable and scientific operation method, effectively recovers the population quantity of the mollusk, and exerts greater economic, social and ecological benefits.)

1. A scientific releasing method of young Orychophragmus warts is characterized by comprising the following steps:

(1) releasing and selecting addresses: selecting a tidal flat, a river estuary wetland, an intertidal zone mangrove forest or a fresh water wetland covered by thin water which meets the seedling culture condition of a seedling culture field of the Orychophragmus warts as a release position;

(2) specification of young Orychophragmus warts: selecting artificially cultivated 2-month-old Orychophragmus warts, wherein the specifications of the seeds are as follows: the total length is 3-4cm, and the growth reaches 30-40 rigid joints;

(3) releasing offspring seed health examination: 5 percent of the total releasing quantity of the seedlings is extracted for health examination, so that the seedlings are ensured to be strong in physique, strong in vitality, complete in wart, free of diseases and injuries and uniform in specification;

(4) the releasing offspring seed counting method comprises the following steps: preparing a plastic tray with the length of 60cm, the width of 30cm and the height of 5cm by adopting a sampling counting method, shoveling a cultivation bed base with the thickness of just 3-5cm from a seedling pool to cover the whole tray, pouring the cultivation bed base into an 80-mesh screen, washing the tray with water, removing bed base mud, and counting;

(5) seed transportation and releasing: the method comprises the following steps of (1) adopting a bottom mud transportation mode, placing the bottom mud in a plastic tray, stacking the tray in a foam box filled with crushed ice, placing the bottom mud in a releasing place, selecting a proper place to directly release the bottom mud, and selecting to perform the releasing in the morning or evening;

(6) and (3) evaluating the effect of the seedlings: continuously proliferating and releasing at the same releasing place for 3 years, and then excavating releasing place for the rhynchophorus schneideri, and quantifying the population density in unit area.

2. The scientific releasing method of the fry of the Orychophragmus warts as claimed in claim 1, which is characterized in that: the seedling culture conditions of the seedling culture field of the Gaussa verrucosa in the step (1) are that the substrate is pure mud, contains a small amount of fine sand, has the thickness of 3-5cm and has fine particles; the water is brackish water, has salinity of 0-15 ‰, and pH of 6.0-8.0, and contains Chlorella, benthic algae, small-sized polychete and organic debris biological bait.

3. The scientific releasing method of the fry of the Orychophragmus warts as claimed in claim 1, which is characterized in that: and (5) the plastic tray in the step (4) has the same specification as the plastic tray in the step (5).

Technical Field

The invention belongs to the technical field of aquatic species proliferation and releasing, and particularly relates to a scientific releasing method of young Orychophragmus rhynchophyllus.

Background

Wart Bombycis (Tylorrhynchus heterochaetus ) It belongs to Annelida, Polychaeta, migratory order, Nereidae, Nereis, commonly known as Hepialus and Delaunax, usually inhabits the coastal or estuary shoal, and is mainly produced in Zhejiang, Guangdong and Fujian provinces. Has high protein, high fat and amino acidsComplete varieties and rich essential amino acid content, and although the surface is oleophobic, the meat is fresh and tender, and the nutrition is rich, which can be called as the cordyceps sinensis on the river. The Chinese traditional medicine can be taken as both food and medicine, has delicious taste, can be used as a traditional Chinese medicine, and has the effects of reducing swelling and tonifying qi. Huangting Biao (a sense of eating Liaogao) was praised as such: the catfish of the autumn wind weever is beautiful in the United states, and the hilsa herring is also inferior to the other summer months, so that the catfish is delicious; the compendium supplement records that food tonifies spleen and stomach, generates blood, promotes diuresis and urinates, and the Chinese herbal medicine requires the original records: warming the stomach, tonifying qi, being rich in nutrition, and enjoying ancient and modern reputations.

In recent years, the verruca koehryi is gradually perceived by consumers slowly, ferocious status is hard to accept by people, but delicious taste and rich nutritional value still make people feel radiant, so that the verruca koehryi is gradually regarded as an excellent seafood product which is not popular in the market.

The rhynchophorus rhynchophyllus has the obvious characteristics of strong time-saving property, low yield, high fishing cost and the like, is very 'critical' to growth environment factors such as weather, water quality, water quantity, soil and the like, and cannot survive after being slightly polluted. The Hemiers kistrodon wartii is a natural high-quality bait for fish, shrimp and other aquatic species, and plays an important role in degrading heavy metals, increasing the oxygen content of bottom mud, improving the bottom mud and the like. The clean living nature population seriously declines due to over fishing and water environment pollution. The originally high-yield mudflat yield per mu is reduced to 20-50 jin/mu/year from 100 jin/mu/year in the eighties of the last century, and people in production areas cannot eat the nourishing, fresh and tender delicious food.

The key technical researches of artificial breeding and proliferation and releasing of the young fry of the Orychophragmus warts are carried out, and the fixed-point putting can restore the population advantages, maintain the biological diversity, degrade the mudflat bottom mud pollution and restore the wetland ecological environment, thereby having very high economic and ecological values. At present, the proliferation and releasing of the rhynchophorus schlegelii also have the defects of unreasonable releasing operation, unscientific releasing place, lack of scientific success evaluation means and the like.

Disclosure of Invention

The invention aims at overcoming the defects of the proliferation and releasing method, namely the technical problem to be solved by the invention is to provide a scientific releasing method of the young fry of the oschus martensii, which is simple, reasonable and scientific, can meet the survival and growth requirements of the young fry in the natural environment, improve the survival rate of the proliferated and released young fry, and ensure the releasing to obtain the effect.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a scientific releasing method of young fry of Orychophragmus warts comprises the following steps:

(1) releasing and selecting addresses: selecting mudflat, river estuary wetland, intertidal zone mangrove forest or fresh water wetland covered by thin layer water which are in line with the seedling culture condition of the seedling culture field of the Gaussa nervosa wart as the releasing position.

The conditions of the existing seedling field of the wart Husky silkworm are as follows: the substrate is preferably pure mud, can contain a small amount of fine sand, has the thickness of 3-5cm, has fine particles, is preferably semi-saline water, has the salinity of 0-15 per thousand and the pH of 6.0-8.0, and is used for cultivating biological baits such as chlorella, benthic algae, small-sized polychetes, organic debris and the like through regulating and controlling the water quality, the substrate and the baits, feeding self-made artificial powder and meeting the living environmental characteristics of the rhynchopsis wartiana.

(2) Releasing seed source and specification: selecting a parent of the Oriosaenops warticus to carry out artificial breeding on seedlings in a nearby seedling raising field, wherein the releasing site of the parent of the Oriosaenops warticus and the seedling is the best; the natural survival rate can be ensured by artificial breeding after 2 months of breeding, and the specification of the seedlings is as follows: the total length is 3-4cm, and the growth reaches 30-40 rigid nodes.

(3) Releasing offspring seed health examination: 5 percent of the total releasing quantity of the seedlings is extracted for health examination, so as to ensure that the seedlings have strong physique, strong vitality, complete wart, no disease or injury and regular and consistent specification.

(4) The releasing offspring seed counting method comprises the following steps: preparing plastic trays with length of 60cm, width of 30cm and height of 5cm by sampling counting method, shoveling culture bed base with thickness of 3-5cm from the nursery pond to cover the whole trays, pouring into 80 mesh sieve, washing with water, removing bed base mud, and counting.

(5) Seed transportation and releasing: the method is characterized in that a bottom mud transportation mode is adopted and placed in a plastic tray, the tray is stacked in a foam box filled with crushed ice, and the bottom mud is directly released in a proper place when the tray arrives at a releasing place.

(6) Releasing time: the selection is made in the morning or evening of sunny weather, and if the release is to intertidal zones, the release is selected during ebb.

(7) And (3) evaluating the effect of the seedlings: continuously proliferating and releasing at the same releasing place for 3 years, and then excavating releasing place for the rhynchophorus schneideri, and quantifying the population density in unit area.

In the existing seedling field of the Hedychis verrucosus in the step (1), fertilized eggs are incubated to 3 rigid joint Hedychis verrucosus larvae and are placed in an incubation barrel for 48 hours, and then the fertilized eggs are transferred into a cement pond with bottom mud for cultivation, wherein the width of the cement pond is 3m, and the length of the cement pond is 20 m. Culturing in a cement pond with a culture density of 6000 tails/m²。

The plastic tray in the step (6) can be consistent with the plastic tray in the step (5) in specification, so that the total number of released seedlings can be calculated conveniently.

Compared with the prior art, the invention has the following advantages:

1. the implementation method is simple, convenient to operate, scientific and reasonable;

2. according to the method, areas such as mudflats, rivers entering the seaport wetland, intertidal mangroves or fresh water wetland covered by thin-layer water are selected as proliferation and discharge positions, the living environmental characteristics of the pelios grubbs are fully considered, the growth and foraging requirements of the seedling of the pelios grubbs can be ensured, and the proliferation and discharge effects are improved;

3. the fry technology and the transportation method adopted by the invention are simple, novel and practical, have small damage and few stubbles to the Orychophragmus rhynchophyllus, and effectively improve the survival rate of the Orychophragmus rhynchophyllus fries.

Detailed Description

The present invention is further illustrated by the following examples, but the scope of the present invention is not limited to the following examples.