Method for small-scale and simple culturing of freshwater rotifers

A small-scale, rotifer-based technology, applied in animal husbandry and other fields, to achieve the effect of reasonable design, low cost and strong operability

Active Publication Date: 2014-10-08
ZHEJIANG INST OF FRESH WATER FISHERIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The research content includes the influence of density, temperature, pH value, salinity, DO, osmotic pressure, light, food type and style, vitamins and other factors on the cultivation of rotifers. There are also many literatures reporting the methods of freshwater rotifers cultivation, but With the development of freshwater rotifer cultivation technology up to now, most of the studies are on the cultivation of pure species. Due to the existence of many uncertain factors in cultivation, there is no suitable cultivation mode, it is difficult to control cladocera and copepods, and the bait of rotifers is not easy to solve. Problems such as decay phenomenon, its large-scale cultivation is still not solved, which restricts the development of freshwater rotifer cultivation technology to a large extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] From June to July 2012, freshwater rotifers were cultivated in eight 500L rectangular buckets using the technical method described in this patent. That is, it becomes dark green and the density of algae reaches a peak. Then start the inoculation of freshwater rotifers, the inoculation density is about 10 / ml, and the rotifer density reaches the peak after 4 days, and the cultivated rotifers are used for the rotifers that lay eggs on July 2 and hatch on July 5. (Australian sleeping cod, Australian bamboo shoot shellfish) Splashes, as bait for opening. Seedlings of sleeping cod are cultivated in a 12m 2 The water depth was 60cm, and the water temperature was 29°C. The rotifers were fed on the second day after hatching, and the problem of opening bait was successfully solved. It was cultivated as bait, and until August 16, 9,100 fry with a size of about 3 cm were successfully cultivated.

Embodiment 2

[0032] From April to July 2013, the rotifers cultivated by the technical method described in this patent successfully became flower (fishbone) gynogenetic fry, gynogenetic fry of chrysalis, hybrid fry of chrysalis and triangular bream, and loach fry The indoor artificial cultivation of sapphire, light lip fish fry and Australian sleeping cod fry provides open bait, including flower fish bone gynogenetic fry (1 bucket), gynogenetic fish fry (2 buckets), and gynocarp gynogenetic fry Bream hybrid fry (10 buckets), loach fry (1 bucket) and gynogenetic fry (1 bucket) are all cultivated in 500L plastic buckets, and Australian sleeping cod fry are grown in 12m 2 in a cement pool. Carry out the cultivation of loach fry in a 500L plastic bucket, cultivate 2cm, and the density is about 5000; in 12m 2 About 20,000 1cm Australian cod fry were cultivated in cement ponds.

Embodiment 3

[0034] In 2014, 30 500L plastic barrels were used to cultivate freshwater rotifers. Compared with 2012 and 2013, the improvement was that transparent PVC boards (length 4100mm, width 1300mm, thickness 3mm) were used to cover the plastic barrels. Every 5 Each bucket uses a PVC board to form a relatively closed cultivation system, which well avoids the impact of rain, dust, chironomus larvae, etc. on the rotifer cultivation bucket. On May 2, the rotifer culture officially started, and the highest density of culture reached 450 / ml. The water quality changes in one batch (from May 26 to June 4) during the cultivation of rotifers were measured, as shown in Table 1.

[0035] Table 1

[0036] number of days operate water temperature pH Ammonia nitrogen (mg / L) Nitrite nitrogen (mg / L) D1 (May 26) Algae inoculation, fertilization 26℃ 7.2 >1.2 <0.001

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Abstract

The invention discloses a method for small-scale and simple culturing of freshwater rotifers. The method is characterized by including the following steps of 1), freshwater rotifer protospecies collection; 2), screening of the freshwater rotifers; 3), biological culturing of bait of the freshwater rotifers; 4), inoculating and culturing enlargement of the freshwater rotifers; 5), collection of the freshwater rotifers; 6), prevention and control of enemy organisms in the process of culturing of the freshwater rotifers. The method is reasonable in design and high in operability; by performing hybrid culturing on the freshwater rotifers and the bait of the freshwater rotifers respectively, the problem of harshness in requirements on culturing conditions when the freshwater rotifers are cultured independently can be solved effectively, and culturing of the freshwater rotifers in fingerling production seasons can be realized without specific equipment as long as plastic barrels and inflating facilities exist indoors or outdoors. The method is free of limitation of equipment and site and has the advantages of low cost and simplicity and convenience in operation.

Description

technical field [0001] The invention belongs to the technical field of aquatic organism bait or live bait cultivation, and in particular relates to a small-scale and simple method for cultivating freshwater rotifers. Background technique [0002] With the rapid development of the breeding industry of famous, special and high-quality aquatic products, the introduction and breeding of new species has been promoted. In the process of introduction, domestication and seedling reproduction, opening the bait for juvenile fish is the key, and the breeding bottleneck of many fine varieties lies in how to solve the problem of opening the bait. Rotifers are the most palatable and high-quality bait for most fry from endogenous nutrition to exogenous nutrition. They are one of the important groups in freshwater bodies. There are more than 2,000 species of rotifers discovered in the world, and they have been reported in my country. There are 252 species. In seawater seedling cultivation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K67/033
Inventor 李飞郭建林张宇飞刘士力黄鲜明王雨辰
Owner ZHEJIANG INST OF FRESH WATER FISHERIES
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