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Method for artificially breeding large-scale fry of odontobutis obscura and the like

A technology of artificial cultivation and sand pond snakehead, applied in the direction of climate change adaptation, animal feed, animal feed, etc., can solve the problems of poor effect and high pathogenicity of water earthworm prices, and achieves the improvement of the success rate of cultivation, the reduction of costs, the Improve the effect of breeding efficiency

Active Publication Date: 2018-02-16
南京市水产科学研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the early stage of cultivating artificial large-scale seedlings, the traditional way of catching rotifers from ponds is mainly used for feeding, and in the later stage, water earthworms are purchased for feeding. Because water earthworms are relatively expensive and have certain pathogenicity, the effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1 The effect of hatching of small trash fish fertilized eggs on the breeding of large-size seedlings of the river Shatang Channa

[0018] Three days after the river sand pond snakehead fry came out of the membrane, the fry had absorbed the yolk material and began to forage for food. At this time, they were fed plankton such as rotifers disinfected with 2% salt water at a density of 15 / mL. Keep in the water The dissolved oxygen is not less than 6mg / L, and the water is changed 1 / 4 every 2 days. As the seed grows to about 1.5cm, feed the small trash fish water flower at a daily dose of 8% of the body weight, and feed it in 2 times, at 8:00 am and 16:00 pm, and observe regularly Food intake and growth. After about 20 days of cultivation, the survival rate of cultivation is 20%.

Embodiment 2

[0020] Four days after the river sand pond snakehead fry came out of the film, the fry had absorbed the yolk material and began to forage for food. At this time, they were fed with plankton such as rotifers disinfected with 3% salt water at a density of 14 / mL. Keep in the water The dissolved oxygen is not less than 6mg / L, and the water is changed 1 / 4 every 2 days. As the seed grows to about 1.5cm, feed the small trash fish water splash at a daily dose of 9% of the body weight. The feed is divided into two feedings, at 8:00 am and 16:00 pm, and observe regularly Food intake and growth. After about 20 days of cultivation, the survival rate of cultivation is 20%.

Embodiment 3

[0022] Four days after the river sand pond snakehead fry came out of the membrane, the fry had absorbed the yolk material and began to forage for food. At this time, they were fed with plankton such as rotifers disinfected with 3% salt water at a density of 18 / mL. Keep in the water The dissolved oxygen is not less than 6mg / L, and the water is changed 1 / 4 every 2 days. As the seed grows to about 1.5cm, feed the small trash fish water splash, the daily dose is 10% of the body weight, and the feed is divided into two feedings, at 8:00 in the morning and 16:00 in the afternoon, and observe regularly Food intake and growth. After about 20 days of cultivation, the survival rate of cultivation is 20%.

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Abstract

The invention relates to a method for artificially breeding large-scale fry of odontobutis obscura and the like, and belongs to the technical field of aquatic organism research. Artificially breedinglarge-scale fry of odontobutis obscura is completed through spawning of small trash fish, observation, disinfection, artificial incubation and feeding. Compared with a method of breeding fry and the method for artificially breeding the large-scale fry of odontobutis obscura and the like in a pond, a high survival rate can be reached, and the culture benefit can be increased. The fry of small trashfish in the same water body is adopted as bait in the later breeding period, the cost is reduced, the operation is simple, and the breeding success rate is greatly increased.

Description

Technical field [0001] The invention relates to a method for artificially cultivating large-size seedlings of the river sand pond snakehead snakehead, belonging to the technical field of aquatic product research. Background technique [0002] Odontobutis obscura (commonly known as Odontobutis obscura) belongs to the order Perciformes, Odontobutis obscura, and the genus Odontobutis. It is also commonly known as catfish, homespun, tiger shark, and tiger head nerd. It is a small freshwater benthic carnivorous Sex economic fish, with few tender thorns, large proportion of edible parts, delicious taste and high nutritional value, is loved by people, and is a local characteristic species with great prospects for development and breeding. [0003] At present, the breeding mode of river snakehead snakehead is mainly nested in river crab ponds. Small-sized seedlings have a low survival rate due to natural enemies or a single source of food, while large-sized seedlings (body length ≥ 2cm) ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/10A23K50/80A23K10/22
CPCA23K10/22A23K50/80A01K61/10Y02A40/81
Inventor 陈树桥周国勤尹绍武
Owner 南京市水产科学研究所
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