Method for colonizing and releasing seawater mullets in public freshwater area

A technology for fresh water and water areas, applied in fish farming, application, climate change adaptation, etc., to achieve the effects of promoting decomposition and utilization, reducing eutrophication, and increasing species of release

Inactive Publication Date: 2014-05-14
SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the literature reports, there has been no report on the method of colonization and re...

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: In 2011, net cages were set up in the Taipu River waters of Shanghai, a public freshwater area that was planned to be transplanted and released, and 10,000 barracuda fry were collected when the full-length specification was 2-3 cm. 2-20 cm desalination treatment, the method is to slowly add fresh water to the temporary storage container and / or breeding container, let the salinity in the water environment where the fry grow to drop to zero within a week, so that they can adapt to the fresh water living environment, while using conventional fishing Use pesticides to kill insects and sterilize to prevent the spread of fish diseases; adopt the transportation method of keeping alive and transfer them to the water environment cages that need to be transplanted and released for temporary cultivation; sterilize and disinfect the fry during the temporary cultivation for 3-10 days to prevent transportation damage lead to infection and death; then submerge part of the...

Embodiment 2

[0024]Embodiment 2: In 2012, net cages were set up in the public freshwater waters of Shanghai Dianshan Lake, which is planned to be transplanted and released, and 20,000 wild natural barracuda fry with a full length specification of 2-5 cm were collected. After desalination treatment, add fresh water slowly to the holding container and / or breeding container, let the salinity in the water environment where the fry grow is zero within a week, let them adapt to the freshwater living environment, and use conventional fishing medicine to kill insects and bacteria at the same time Disinfect to prevent the spread of fish diseases; adopt the method of keeping alive and transfer to the water environment cages that need to be transplanted and released for temporary cultivation; sterilize and disinfect the fry during the temporary cultivation for 3-10 days to prevent infection and death caused by transportation damage; and then Submerge part of the net cages into the water, let the fish ...

Embodiment 3

[0025] Embodiment 3: The place of the desalination treatment in this embodiment and embodiment 2 is arranged in the nursery field and the seaside, and the desalination treatment procedure is arranged before the long-distance transportation. The mesh size of the net cage should be able to limit the size of the fish fry in the cage. When the fish fry are sterilized and disinfected during the 3-10 days of temporary breeding, they should be surrounded by airtight membrane materials to ensure the controllability of the sterilization and disinfection range, and then partially The net cage is submerged in the water, so that the fry can swim out of the net cage independently, and enter the transplanting and releasing waters on their own initiative, so as to improve the survival rate of transplanting and releasing; remove the net cage, and eliminate the impact on the ecology of natural waters; achieve the multiplication of barracuda in freshwater waters, and realize Barracuda for carbon...

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Abstract

The invention discloses a method for colonizing and releasing seawater mullets in a public freshwater area and relates to methods for colonizing and releasing seawater mullets which are near-shore river mouth marine fish into natural fishery water areas. The method includes: before colonizing and releasing, lowering water salinity for mullet fries 2-20cm in total length, using fishery medicines to prevent fish diseases, and allowing the mullet fries to adapt to freshwater environments; using a keep-alive transportation method to transfer the mullet fries to net cages in the water area planned for colonizing and releasing for temporary culture; sterilizing the mullet fries to prevent infection and death caused by transportation damage; placing parts of the net cages into water, allowing the mullet fries to initiatively swim out of the net cages and enter the freshwater area so as to increase mullet fry releasing survival rate, and removing the net cages to bring the carbon sink fishery value of the mullets in the freshwater area into play. The method has the advantages that colonizing and releasing varieties are increased, water area purifying capability is increased, the carbon sink fishery value of the mullets in the freshwater area can be brought into play, species invasion risk is avoided, the method is suitable for colonizing and releasing in featured water areas such as lakes, rivers, reservoirs, landscape water bodies and artificial wetlands systems, and water area purification effect can be achieved.

Description

technical field [0001] The invention relates to a method for transplanting and releasing fish, in particular to a method for transplanting and releasing marine fish in near-shore estuaries—pike pike to natural fishery waters. It is suitable for lakes, rivers, reservoirs, landscape water bodies, and artificial wetlands. Systematic public waters colonization and release methods and activities. Background technique [0002] The fishery resources in natural fishery waters have declined seriously, and the biodiversity has declined significantly. Economic construction has caused a large amount of nutrients such as nitrogen and phosphorus to be excessively imported into natural fishery waters. The ability of aquatic animals to transform and utilize nutrients in natural fishery waters has gradually declined, and natural waters have become eutrophic. It is getting more and more serious, the water quality is deteriorating, the purification and treatment capacity of aquatic animals is ...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 阳清发马秋兰杨武
Owner SHANGHAI NENGZHENG FISHING TECH DEV CO LTD
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