Method for culturing little yellow croakers by artificially desalting seawater salinity
A technology of artificial seawater and small yellow croaker, applied in fish farming, climate change adaptation, application, etc., can solve the problems of low survival rate, high cost, low efficiency, etc., and achieve the effect of increasing survival rate, reducing desalination cost and shortening time
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Embodiment 1
[0029] (1) Prepare aquaculture ponds and desalination buckets, for two aquaculture ponds and four 2 m 3 The desalinated water tanks are disinfected, and sand-filtered seawater is injected into one aquaculture pool to adjust the salinity of seawater between 26-32‰; fresh water after the storm is injected into another aquaculture pool to adjust the salinity to 6‰; Inject the fresh water after the storm into the desalination bucket, and adjust the salinity to 22‰, 18‰, 14‰ and 10‰;
[0030] Among them, the breeding pool is a semi-buried smooth surface cement pool, with a depth of 1.8-2m, a water depth of 1m, and a water capacity of 20m. 3 , printed with scale marks, easy to calculate the water injection volume, there is a lighting lamp on the top of the breeding pond, the power of the lighting lamp is 12W, and the layout density is 1 / 10m 2 The surface of the desalination bucket is tempered glass, the color is light blue to dark blue, the bottom is conical, with scale marks print...
Embodiment 2
[0035] Embodiment 2: Acute salinity stress experiment
[0036] Small yellow croakers raised in seawater with a salinity of 28‰ to 32‰ are acutely transferred to water bodies with a salinity of 0, 2, 4, 6, 12, 18, 24, 29, 30, 36, 42, 46 and 63‰ , the 96-hour survival rates were 0, 0, 65, 87, 95, 98, 98, 100, 98, 95, 57, 5 and 0%, respectively, such as figure 1 .
[0037] It can be seen that the small yellow croaker is a kind of eurysalline adaptable fish, and its suitable salt range is as low as 4‰, and 65% of the individuals can survive and adapt, and the maximum can reach 42‰.
Embodiment 3
[0038] Embodiment 3: 96-hour semi-lethal experiment of small yellow croaker
[0039] Using the GlobalLogitmodel method to calculate the 96-hour semi-lethal rate of small yellow croakers, the minimum salinity of the 96-hour semi-lethal of small yellow croakers is 2.45‰, and the maximum salinity is 41.68‰, such as figure 2 .
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