Method for urging largemouth bass to spawn in advance

A largemouth bass and spawning pond technology, applied in fish farming, application, climate change adaptation and other directions, can solve the problems of heavy stress response of broodstock, large damage to broodstock, and heavy workload, so as to accelerate the development of gonads and avoid Disease occurrence, low cost effect

Active Publication Date: 2016-03-23
ANHUI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many disadvantages in this method of promoting early spawning of fish through artificial oxytocin or artificial insemination: firstly, the damage to the broodstock itself is relatively large, and the stress response of the broodstock after oxytocin is severe, which affects spawning; secondly, injection of oxytocin It is necessary to operate each fish one by one, and the workload is heavy; and the broodstock after being induced by hormones cannot be accepted by consumers because they have been injected with hormones.

Method used

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  • Method for urging largemouth bass to spawn in advance
  • Method for urging largemouth bass to spawn in advance
  • Method for urging largemouth bass to spawn in advance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a. Early cultivation: Before September, select 1-year-old perch as parents, and stock about 1300 groups of parents of about 0.5kg per mu in the cultivation pond; between June and September, feed extruded feed twice a day, select respectively Feed at 10:00 am and 4:00 pm, and an extruded feed concentration device is placed in the cultivation pond. Properly adjust the feeding amount according to the temperature and weather. Generally, the feeding is stopped until the fish do not eat much. Considering the floating property of the extruded feed, in order to achieve the purpose of controlling the feed in a specific area for the fish to eat, use The described extruded feed concentration device is installed to ensure the growth and development of broodstock; a small amount of silver carp and crucian carp can be nested in the cultivation pond.

[0039] b. Intensive cultivation: From September to November, the extruded feed is changed to ice fresh fish to feed broodstock. Becaus...

Embodiment 2

[0043] What is different from Example 1 is that in the early stage of cultivation, the 2-year-old perch is selected as the parent, and 1000 groups of parents of about 0.7kg are stocked in each mu of the cultivation pond. 260 tails, other conditions are the same.

Embodiment 3

[0045] What is different from Examples 1 and 2 is that in the early stage of cultivation, the perch mixed with the 1st age and the 2nd age was selected as the parent, and 1200 groups of parents of about 0.6kg were stocked in each acre of cultivation ponds, and the stocking density of the parents during intensive cultivation: per acre 220 male fish and 250 female fish were stocked, and other conditions were the same.

[0046] Proved by the above examples, the broodstocks cultivated by the method of the present invention have all laid eggs earlier, and the method is effective and easy to operate.

[0047] Below in conjunction with accompanying drawing, the structure of feed concentrating device, light-transmitting thermal insulation greenhouse, artificial fish nest that the present invention plays an important role in promoting spawning is further explained:

[0048] Feed concentration devices, such as figure 1 , 2 , as shown in 3:

[0049] The feed concentrating device inclu...

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Abstract

The invention belongs to the field of fish breeding and particularly relates to a method for urging largemouth bass to spawn in advance. The method comprises the steps of: before September, selecting one-year old and/or two-years old bass as parents, and stocking 1000-1300 groups of the parents of 0.5-0.7 kg per mu in a breeding pond; feeding an expanded feed every day, wherein an expanded feed gathering device is arranged in the breeding pond; from September to November, feeding the parent fishes with iced fresh fishes, and when the temperature is lower than 15 DEG C, selecting the parents and putting the parents in a transparent heat-preserving greenhouse for intensified breeding, and starting microporous oxygenating equipment, flushing a spawning pond with water, and in the last ten days of March, placing an artificial spawning nest in the spawning pond. By virtue of the method provided by the invention, under the condition that the largemouth bass needs not to be artificially induced to spawn and artificially inseminated, a purpose of natural spawning and natural insemination can be achieved by controlling conditions such as water quality, nutrition and temperature. Each operation in the method plays a critical role of urging largemouth bass to spawn in advance.

Description

technical field [0001] The invention belongs to the field of fish breeding, and in particular relates to a method for promoting early spawning of largemouth bass. Background technique [0002] In the reproduction and production of fish, the fry bred earlier can be sold at a higher price due to the vacancy of the market, and can occupy the market as soon as possible to obtain more benefits. In the process of artificial reproduction, it is generally necessary to induce spawning of the broodstock, so that the broodstock can concentrate on laying eggs within a certain period of time, which includes "artificial induction, artificial insemination" and "artificial induction, natural fertilization". There are many disadvantages in this method of promoting early spawning of fish through artificial oxytocin or artificial insemination: firstly, the damage to the broodstock itself is relatively large, and the stress response of the broodstock after oxytocin is severe, which affects spaw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A01K61/02
CPCA01K61/00Y02A40/81
Inventor 余鹏万全丁淑荃李忠伟吴根发胡先锋宋新欢毕志华
Owner ANHUI AGRICULTURAL UNIVERSITY
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