Potentiality of cultivation of rotifer Brachionus plicatilis with vitamin C fermentation wastes
LIU Xin, WANG Wei, JIANG Yusheng*, FENG Siyu, HE Yuhang, CAO Linquan, CHEN Xue
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College of Fisheries and Life Science, Dalian Ocean University, Dalian
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Published
2020-05-22
Issue Date
2020-05-22
Abstract
Rotifer Brachionusplicatilis was cultured in a 15 L glass jar at a density of 20 ind./mL under continuous aeration and fed 7 kinds of diets including alga Nannochloropsis sp. (A), vitamin C fermentation waste (B), alga Schizochytrium sp. (C), alga Nannochloropsis sp.+ vitamin C fermentation waste (D), alga Nannochloropsis sp.+ Schizochytrium sp. (E), Nannochloropsis sp. + vitamin C fermentation waste + Schizochytrium sp. (F), and Nannochloropsis sp. mixed with solid fermentation waste (G) at water temperature of (29.0±1.4)℃, and salinity of 23.0±1.1 for 7 days to evaluate the potentiality of rotifer cultivation with vitamin C fermentation wastes. The maximal density (211 ind./mL)of the rotifer was found in the group (G), with the maximal carrying egg rate of (69.4±7.1)%, average daily production of(27.3±4.6)ind./(mL·d) and average daily growth rate of (33.5±2.6)%/d and the minimal density (11 ind./mL) of the rotifer in group B. Descending order of the rotifer density was expressed as group G>group E>group D>group F>group A>group C>group B. There were high concentrations of ammonia nitrogen, nitrite, and nitrite in group B, group D and group G, containing fermentation waste, with the maximal concentration of ammonia nitrogen (13.81 mg/L) in group B. The pH values were found to be decreased in all the groups, especially in group B (7.13) and group D (7.17) at the end of the experiment, without obvious change. In conclusion, vitamin C fermentation waste is a potential food for rotifer culture, and it is recommended that the vitamin C fermentation waste be fed as solid mass without liquid containing high concentration of ammonia nitrogen, and mixed with other food such as microalgae.
LIU Xin, WANG Wei, JIANG Yusheng, FENG Siyu, HE Yuhang, CAO Linquan, CHEN Xue.
Potentiality of cultivation of rotifer Brachionus plicatilis with vitamin C fermentation wastes[J]. Journal of Dalian Fisheries University, 2020, 35(3): 333-338 https://doi.org/10.16535/j.cnki.dlhyxb.2020-041
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