Separation type blend aquiculture method of prawn and filter-feeding fish

A mixed culture and filter-feeding technology, which is applied in the field of separate mixed culture of shrimp and filter-feeding fish, can solve the problems of residual food, competition for shrimp feed, and the production of shrimp is not significantly improved, so as to avoid residual food and competition for bait. Effect

Inactive Publication Date: 2006-02-22
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some filter-feeding fish are omnivorous, and they may prey on cultured prawns in addition to filter-feeding plankton, especially when the prawns are small or are more dangerous when they moult; The problem of high-quality and high-priced feed, the polyculture of some fish and shrimp can only increase the total output of farming, but the output of shrimp has not increased significantly
Therefore, the current polyculture technology of prawns and filter-feeding fish has the following disadvantages: filter-feeding fish can eat prawns, filter-feeding fish compete for food for prawns, and there is also a problem of suitable stocking density for filter-feeding fish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] The experiment was carried out in the Yellow River Delta Hairy Crab Farm in Dongying City, Shandong Province. There are 9 experimental ponds, the average water depth of the pond is 1.5m, and the area of ​​each pond is 36×14m 2 . Clean the pond before releasing the water, expose the bottom of the pond to the sun, kill pathogenic organisms with drugs, add water, fertilize and cultivate plankton, stock filter-feeding fish and prawns, and feed regularly. Each pond is stocked with 22700 tails of Litopenaeus vannamei (45m -2 ). Among them, 3 ponds only put prawns (denoted as S); 3 ponds adopt separate polyculture of prawns and tilapia, but do not feed tilapia (SFn); 3 ponds adopt separate polyculture of prawns and tilapia Polyculture and feed the tilapia at 1% of fish body weight per day (SFf). The polyculture ponds were stocked with 26 kg of tilapia with an average weight of 51.7 g per pond. In order to prevent the fish from eating the prawns and eating the feed provide...

Embodiment 2

[0012] The pond area used in the experiment is about 0.1ha, and the average water depth is 1.3m. In the middle of the pond, two rows are arranged side by side with an area of ​​5×6m 2 There are 12 enclosures. The screen is made of impermeable polyethylene woven cloth, and the lower part is buried in the soil for 30cm. Each enclosure air pump is inflated to prevent water stratification and increase dissolved oxygen.

[0013] The shrimp fry used in the experiment were purchased from the hairy crab farm where the experiment was conducted, and the tilapia was purchased from the National Tilapia Breeding Farm in Jiaozhou, Shandong. 2300 Litopenaeus vannamei shrimp juveniles were put into each enclosure. Because the duration of the experiment is shorter than that of the above-mentioned pond culture, the average individual of the prawns during the experiment is smaller, so the stocking density is larger than the above-mentioned pond culture density. According to the results of th...

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PUM

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Abstract

A cellular-type hybrid breeding method for prawn and filter feeding fish, includes cleaning the pool before discharging water, sunburning the bottom of the pool, killing and extinguishing pathogenic organism, and adding water, applying to fertilizer to culture plankton, freeing and culturing filter feeding fish and prawn, moreover, bait throwing in fixed time, adding oxygen, and praying them when they are up to goods specification; characterized in that it breeds separately prawn and filter feeding fish positioned in the closed net cages or semiclosed nets. The inoculation denseness of said prawn is 15000 to 40000 tails per acre, and that of filter feeding fish is 10 to 120 kilogram per acre, whereof the size of the fish is 25 to 200 gram per tail. The invention breeds prawn and filter feeding fish separately applied to the closed net cages or semiclosed nets, which avoids filter feeding fish to murder and seize bait with prawn, and applies to the best denseness for fish and prawn hybrid breeding.

Description

technical field [0001] The invention relates to a method for mixed cultivation of fish and shrimp, in particular to a method for separate mixed cultivation of prawns and filter-feeding fish. Background technique [0002] Pond mixed culture technology has a long history in our country, and traditional fish polyculture can make full use of different ecological niches. At present, there is a lack of systematic related polyculture technology in prawn farming, and most prawns are cultured alone. In order to prevent the spread of WSSV disease in prawns and reduce the sewage from breeding, the closed or semi-closed pond culture of prawns imitating the pond fish farming technology has gradually developed. In the closed or semi-closed pond culture process of prawns, the problem of water quality restricting the growth of prawns often occurs in the later stage of culture. Previous studies have shown that in addition to artificial feed, filter-feeding fish also filter-feed a certain a...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 董双林介子林赵夕旦孙卫明田相利
Owner OCEAN UNIV OF CHINA
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