A method for marking large yellow croaker multiplication and release
A technology for the proliferation and release of large yellow croaker, which is applied in fish farming, application, climate change adaptation, etc., can solve problems such as failure to effectively evaluate the release effect, and achieve the effect of stability, convenience and simple process
Inactive Publication Date: 2016-03-02
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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Problems solved by technology
In order to restore the resources of large yellow croaker, large-scale breeding and releasing activities have been carried out. However, due to the long-distance migration characteristics of large yellow croaker and the limitation of marking methods, the effect of releasing large yellow croakers has not been effectively evaluated.
Method used
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Embodiment 1
[0020] 1. Marking stage: In the hatchery where large yellow croakers are released, increase the concentration of strontium ions in the nursery pond to 0.05-0.10g / L by adding strontium chloride hexahydrate, and carry out strontium marking on larvae aged 30-40 days . The feeding conditions are all in the normal growth environment stipulated in the nursery place, and only the concentration of strontium ions in the feeding water is increased. Since the water needs to be changed every day during the seedling cultivation process, an equal amount of strontium chloride hexahydrate needs to be added after each water change. The specific weight is calculated through the formula and the water change volume to ensure the stability of the strontium ion concentration in the nursery pond. The strontium flag is marked for 10 days. After the marking was over, 10 large yellow croaker larvae were left as samples for comparison.
[0021] 2. Control sample processing stage: measure the body leng...
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The invention relates to a marking method for proliferation and releasing of large yellow croakers. The marking method includes the steps that hexahydrate strontium chloride is added in a nursery pond for releasing the large yellow croakers, the concentration of strontium ions in water of the nursery pond is increased to 0.05-0.10 g / L, strontium marking is conducted on fries with the age being 30-40 days, the marking time is 10 days, and after marking, strontium element content detection is conducted on an otolith abrasive disc. The marking method is simple in technology, has stability and convenience, can provide an effective means for evaluation of the proliferation and releasing effects of the large yellow croakers, can be used for tracking and monitoring the releasing effect of the large yellow croakers for a long-time, and provides a scientific basis for the fishery management department.
Description
technical field [0001] The invention belongs to the field of releasing markers, in particular to a method for multiplying and releasing markers of large yellow croakers. Background technique [0002] Marking technology is an important tool for evaluating the effect of fish proliferation and release. The commonly used marking methods include in vitro listing, fin clipping and fluorescence, etc., but these methods cause some damage to the fish body or poor stability, and require a lot of material resources and resources. Human power is not a sign of mass seedlings. In order to better serve the proliferation and release work, strontium ions (Sr 2+ ) to mark fish otoliths to solve the difficult problem of marking large-scale seedlings. The concentration of strontium ions in the ocean is relatively stable, about 7.6-8.1mg / L. Strontium and calcium (Ca) belong to the same group of elements. Strontium can replace calcium and deposit in fish otoliths without any harm to fish. Comp...
Claims
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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 林楠姜亚洲凌建忠袁兴伟杨林林张辉黎雨轩李圣法
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI