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Tilapia seawater acclimation method

A tilapia and seawater technology, applied in fish farming, climate change adaptation, application, etc., can solve problems such as fish body surface ulceration, prolonged death, etc., and achieve the effects of expanding the breeding range, improving quality, and large economic benefits

Inactive Publication Date: 2010-07-07
河北中捷罗非鱼养殖有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the seawater tilapia seedlings obtained by Professor Li Sifa from Shanghai Fisheries University by crossing New Jifu tilapia and Saro tilapia can only be cultured in seawater with a salinity of 15-25‰. When the salinity exceeds 28‰, It will lead to festering on the surface of the fish, which will lead to death if it lasts for a long time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

test example 1

[0007] This experiment is carried out in Hebei Province Cangzhou Lingang Zhongjie tilapia breeding farm, and its technical method of the present invention comprises: 1, the culture condition of acclimatization pond;

[0008] 1. Breeding conditions in domestication ponds:

[0009] Tilapia has strong adaptability to water quality. No matter new or old, deep or shallow ponds can be used as acclimatization ponds, but good water sources are required. Keep water temperature at 25-32°C, dissolved oxygen at 2.0-6.0mg / L, ammonia nitrogen at 0.0- 0.2mg / L, pH value 5-8, area 1 mu, water depth 2 meters;

[0010] 2. Temporary breeding of seedlings: adopt healthy tilapias (hybrids of Nile tilapia and Israeli red tilapia) with a body length of 5-7cm to temporarily raise them in freshwater ponds for 7 days, and stock red tilapias per mu in the domestication ponds 1,500 fish species are fed with full-price compound feed for tilapia. The main ingredients are: fish meal, soybean meal, peanut me...

test example 2

[0014] This experiment is carried out in Hebei Province Cangzhou Lingang Zhongjie tilapia breeding farm, and its technical method of the present invention comprises: 1, the culture condition of acclimatization pond;

[0015] 1. Breeding conditions in domestication ponds:

[0016] Tilapia has strong adaptability to water quality. No matter new, old, deep or shallow ponds can be used as domestication ponds, but the water source is required to be good, keep the water temperature 25°C-32°C, dissolved oxygen 2.0-6.0mg / L, ammonia nitrogen 0.0 -0.2mg / L, pH value 5-8, area 1 mu, water depth 2 meters;

[0017] 2. Temporary breeding of seedlings: adopt healthy tilapias (hybrids of Nile tilapia and Israeli red tilapia) with a body length of 5-7cm to temporarily raise them in freshwater ponds for 7 days, and stock red tilapias per mu in the domestication ponds 1,500 fish fry are fed with full-price compound feed for tilapia. The main ingredients are: fish meal, soybean meal, peanut meal,...

test example 3

[0021] In 2009, a large-scale test of the method of the present invention was carried out in Lingang, Cangzhou, Hebei Province, Zhongjie tilapia breeding farm. Domestication methods, breeding conditions and management methods are the same as Case 2 and Case 3, so I won’t go into details here. More than 20,000 tilapia seedlings have been domesticated, and the survival rate of domestication is over 95%, and the domestication of freshwater tilapia has been extended to 32‰ When cultured in pure seawater with high salinity, its growth and physiological status are normal.

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Abstract

The invention relates to a tilapia seawater acclimation method which needs to provide a domestication method for tilapia from freshwater to seawater. The method is characterized in that the able-bodied tilapia with a length above 5cm is acclimated in the seawater through a 4-step method which comprises the following steps that: step 1: concentrated seawater or sea salt is prepared into brackish water with 0.8% to 1.2 % of salinity, and the tilapia is shifted into an acclimation pond with the brackish water with the salinity to be cultivated for 2 to 3 days; step 2: the concentrated seawater or the sea salt is prepared into seawater with 4% to 5% of salinity, and then the seawater is gradually injected into the acclimation pond in step 1, the seawater salinity is increased by 0.4% to 0.5% every day, and then the tilapia is acclimated for 2 to 4 more days after the seawater salinity gradually reaches 1.8% to 2.2%; step 3: seawater with 4% to 5% of salinity is used for improving the salinity of the acclimation pond to 2.4% to 2.8% within two days, and the tilapia is acclimated for 2 to 4 days; and step 4: seawater with 4% to 5% of salinity is used for improving the salinity of the acclimation pond to 0.2% to 0.4% every two days, the tilapia is acclimated for 2 to 3 days after the salinity is increased by every 0.2% to 0.4%, the salinity is gradually increased to 3% to 3.5%, and then the tilapia is shifted into pure seawater to be cultivated.

Description

technical field [0001] The invention relates to seawater domestication and cultivation of fish, in particular to a process in which freshwater seedlings of tilapia among freshwater fish are gradually transferred to seawater for cultivation after being domesticated in seawater. Background technique [0002] Tilapia is a warm-water fish belonging to the order Perciformes and the family Cichlidae, native to the brackish waters of the African continent and the Middle East. At present, the annual output of tilapia farming in my country ranks first in the world, accounting for about 60% of the world's tilapia production. Due to the salinity of domestic tilapia fingerlings exceeding 29‰, it is easy to cause ulcers on the surface of the fish, which will lead to death if it lasts for a long time. Therefore, the vast majority of tilapia in China are currently farmed in freshwater, and are limited by the scope of the water environment and the scale of farming, especially the polycultu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 筴金华张天时张艳红孔杰赵海胜
Owner 河北中捷罗非鱼养殖有限公司
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