One of my clients is a stickler for maintaining balance in the aquaria, not wanting to use medicines whenever possible. This is a valid approach from a biologist point of view and has a place in larger environments. Sometimes however, in an artificial aquarium system where there is a higher than normal stocking densities, a veterinary approach may be more appropriate. But the balanced approach is particularly important when dealing with bacteria, whether you’re using antibiotics, or water disinfection tools.
This article details the effects of UV on beneficial bacteria.
| Aquaculture Research | |||||||||||||||||
| Volume 44, Number 2 (January 2013) | |||||||||||||||||
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Effect of ultraviolet (UV) radiation on the abundance and respiration rates of probiotic bacteria. | ||||||||||||||||
| Authors: | M. Angélica Garrido-Pereira, André Luiz Braga, Andréa Ferretto da Rocha, Luís André Sampaio, Paulo César Abreu | ||||||||||||||||
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| Source: | Aquaculture Research, Volume 44, Number 2 (January 2013) | ||||||||||||||||
| Page Numbers: | 261 – 267 | ||||||||||||||||
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| Abstract: | Effects of ultraviolet radiation (UV) on probiotic bacteria (Bacillus subtilisand B. licheniformis) were tested in two experiments, with the following treatments: (i) UVtreatment – using fluorescent and UV-lamps and (ii) Control – CTRL, using fluorescent lamps. Bacterial abundance and respiration were evaluated every 24 h for 3 days for Experiment 1, and at 0, 6 and 24 h for Experiment 2. In the Experiment 1, total UVdose was 4 336.41 mW cm-2. UVtreatment presented small respiration rates only on day 3, while in the CTRLoxygen consumption was always high. On all days, the abundance of the Bacilliexposed to UVwas significantly smaller than that of the CTRL. The second experiment, with total UVdose of 1 445.47 mW cm-2, presented oxygen consumption in the UVtreatment only during the first 6 h. In the CTRL, oxygen consumption increased from the beginning due to the bigger abundance Bacillicells. Small coccus-shaped bacteria ocurred in the UVtreatment of both experiments. It may be concluded that exposure to UV, normally used for water disinfection, can inactivate probiotic bacteria. | ||||||||||||||||
| Citation: | M. Angélica Garrido-Pereira, André Luiz Braga, Andréa Ferretto da Rocha, Luís André Sampaio, Paulo César Abreu . Effect of ultraviolet (UV) radiation on the abundance and respiration rates of probiotic bacteria. Aquaculture Research, Volume 44, Number 2 (January 2013), pp. 261-267, <http://ejournals.ebsco.com/direct.asp?ArticleID=4B39AD4953156DF27216> | ||||||||||||||||
| URL: | http://ejournals.ebsco.com/direct.asp?ArticleID=4B39AD4953156DF27216 | ||||||||||||||||
