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Growth performance of the very small rotifer Proales similis is more dependent on proliferating bacterial community than the bigger rotifer Brachionus rotundiformis
Le, D.V.B.; Nguyen, P.N.; Dierckens, K.; Nguyen, D.V.; De Schryver, P.; Hagiwara, A.; Bossier, P. (2017). Growth performance of the very small rotifer Proales similis is more dependent on proliferating bacterial community than the bigger rotifer Brachionus rotundiformis. Aquaculture 476: 185-193. https://hdl.handle.net/10.1016/j.aquaculture.2017.03.046
In: Aquaculture. Elsevier: Amsterdam; London; New York; Oxford; Tokyo. ISSN 0044-8486; e-ISSN 1873-5622, more
Peer reviewed article  

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Keywords
    Brachionus rotundiformis Tschugunoff, 1921 [WoRMS]; Proales similis de Beauchamp, 1907 [WoRMS]; Rotifera [WoRMS]
Author keywords
    Rotifers; Proales similis; Brachionus rotundiformis; Probiotics; Growthperformance; Microbial community

Authors  Top 
  • Le, D.V.B., more
  • Nguyen, P.N.
  • Dierckens, K., more
  • Nguyen, D.V., more
  • De Schryver, P., more
  • Hagiwara, A.
  • Bossier, P., more

Abstract
    Proales similis and Brachionus rotundiformis are commercially cultured species, which predominantly feed on microalgae. However, the importance of the bacterial community on growth performance of P. similis and B. rotundiformis culture is still unknown. In this study, the effect of limiting the bacterial growth and, as a second aim, the effect of the addition of a small amount of live or dead bacteria on the growth performance and microbial community (MC) of P. similis or B. rotundiformis culture was evaluated for a 10 day culture period. A rotifer culture with non-manipulated MC and fed autoclaved algae was used as the first control, and a culture started in autoclaved sea water and fed autoclaved algae was used as the second control. In order to test a feed effect, probiotics and other bacteria present in the culture system were killed (inhibited to grow) through the addition of an antibiotic mixture (AB) and the rotifer culture performance was compared to that of a culture to which live probionts were added. In the presence of the live probiotic mixture, both rotifers species showed a better growth performance than those without the presence of probiotic mixture or those with the AB added. In addition, the growth performance of the rotifer P. similis is more dependent on proliferating bacterial community than the rotifer B. rotundiformis. The supplementation of these probiotic bacteria not only increased the production of the rotifers, but also had a regulating effect on the microbiota. The bacterial density was below detection limit in TCBS, MRS agar and MA in all treatments using AB during the culture period for both rotifer species.

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