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Method for increasing survival rate of fish living through the winter

A survival rate and fish technology, applied in the field of improving the survival rate of fish over winter, can solve the problems of poor physique, pond fish suffering from bubble disease, and poor management.

Inactive Publication Date: 2007-12-26
朱训猛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, with the thickening of pond bottom silt, the increase of oxygen consumption factors such as too many wild fish or too high density of pond fish makes the contradiction of water hypoxia more prominent.
Second, fish species are small in size and poor in physique
Third, poor management
In addition, at the end of winter, the dissolved oxygen in the pond water was too high, and measures to reduce oxygen were not taken, which caused the fish in the pond to suffer from air bubble disease, resulting in dead fish

Method used

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Examples

Experimental program
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Embodiment Construction

[0005] 1. Choose a suitable wintering pool: The water depth of the wintering pool should be kept above 1.5 meters, the bottom of the pool should be flat, and the less silt the better. The water quality requires high oxygen content and low organic matter content. If the oxygen content is too low, the flow and water drop should be increased. Those with industrial sewage and a large amount of domestic sewage flowing in cannot be used as overwintering pools. Overwintering pools with poor conditions should be strictly repaired. For example, fish ponds with shallow water and a lot of mud should be combined with farmland manure, dig out silt, heighten and reinforce the pond embankment, and increase the water level; try to remove weeds and wild fish in the pond as much as possible.

[0006] 2. Cultivate robust large-scale fish species: Overwintering fish species should be more than 50 grams in size, strong and plump, free from disease and injury, strong in cold resistance and disease ...

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Abstract

The present invention relates to a method for raise winter survival rate of fishes. It is characterized by adopting three measures to implement the goal of raising winter survival rate of fishes. Said three measures include: (1), selecting proper wintering pond, its water depth must be above 1.5m; (2), cultivating health and strong large-specification fish variety; and (3), making management of winter fishes. Said invention also provides the concrete steps and concrete requirements of above-mentioned every measure.

Description

technical field [0001] The invention relates to a method for improving the overwintering survival rate of fish. Background technique [0002] When it comes to winter, fish overwintering work is in progress. When the water temperature drops below 7-10°C, several major cultured fish will stop feeding or rarely feed. Under freezing conditions, the temperature of the unfrozen water layer is about 1-4°C, these fish basically do not eat, their metabolism slows down, and their growth stops. Therefore, attention must be paid to overwintering management to reduce fish deaths. The main reasons for the death of overwintering fish are, first, severe hypoxia in overwintering water bodies. The oxygen in the water body mainly comes from the photosynthesis of aquatic plants, and the air and water injection are mixed to increase oxygen. In winter, the water in the pool is thin, the number of phytoplankton is small, the light transmission of the ice is poor, and the oxygen production of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 朱训猛
Owner 朱训猛