Marking method suitable for acanthopagrus schlegelii juveniles
A marking method and juvenile fish technology, applied in the fields of application, fish farming, animal husbandry, etc., to achieve the effect of low price, good marking quality and low toxicity
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Embodiment 1
[0026] The black sea bream juveniles provided in this example are 40-49 mm in length and 1.3-2.8 g in body weight, and they are temporarily raised in 500 L culture tanks 10 d at a temporary density of 1.6 fish / L. During the temporary raising period, the pellet feed (Yuan Brand 0# floating pellet feed) was fed twice a day in the morning and evening until full. During temporary cultivation, the water temperature was kept at 23±2.5°C, the salinity was 33±2.0‰, the dissolved oxygen was 6.22mg / L, the pH was 7.6-7.8, and the photoperiod was 14L / 10D. The daily water change rate accounts for 30% of the aquaculture water body.
[0027] Alizarin red (molecular formula: C 14 h 7 NaO 7 S·H 2 O) be ground into fine powder (alizarin red is orange-yellow or yellow-brown powder, soluble in water), with the cultivated water after filtering, through careful stirring, all dissolvings, make the mother liquor of 2000mg / L stand-by; During the preparation process, an appropriate amount of sodiu...
Embodiment 2
[0031] Refer to Example 1 for the temporary rearing of black sea bream juveniles provided in this example and the preparation of alizarin red dyeing solution mother solution.
[0032] The dipping container uses a holding tank with a capacity of 60L, and places it in a shaded and quiet place. Add filtered breeding water to the dipping container, and use the mother liquor to make 30L of 200mg / L dipping labeling solution, adjust the pH to 7.6, and the natural water temperature (23 ± 2.3 ℃). 60 black sea bream juveniles were randomly placed in each dipping bucket, and the air pump was used to inflate continuously, and the dipping time was 24 hours.
Embodiment 3
[0034] Refer to Example 1 for the temporary rearing of black sea bream juveniles provided in this example and the preparation of alizarin red dyeing solution mother solution.
[0035] The dipping container uses a holding tank with a capacity of 60L, and places it in a shaded and quiet place. Add filtered breeding water to the dipping container, make 300 mg / L dipping marking liquid with the mother liquor, adjust the pH to 7.6, and adjust the pH to 7.6. The natural water temperature (23 ± 2.3 ℃). 60 black sea bream juveniles were randomly placed in each dipping bucket, and the air pump was used to inflate continuously, and the dipping time was 24 hours.
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