An acyl homoserine lactone-degrading microbial community improves the survival of first-feeding turbot larvae (Scophthalmus maximus L.)
Tinh, N.T.N.; Yen, V.H.N.; Dierckens, K.; Sorgeloos, P.; Bossier, P. (2008). An acyl homoserine lactone-degrading microbial community improves the survival of first-feeding turbot larvae (Scophthalmus maximus L.). Aquaculture 285(1-4): 56-62. dx.doi.org/10.1016/j.aquaculture.2008.08.018 In: Aquaculture. Elsevier: Amsterdam; London; New York; Oxford; Tokyo. ISSN 0044-8486; e-ISSN 1873-5622, more |  |
| Keywords | Acids > Organic compounds > Organic acids > Amino acids
Chemical reactions > Degradation > Biodegradation
Crustaceans
Developmental stages > Larvae > Fish larvae
Rearing
Survival
Virulence
Penaeus vannamei Boone, 1931 [WoRMS]; Rotifera [WoRMS]; Scophthalmidae Chabanaud, 1933 [WoRMS]; Scophthalmus maximus (Linnaeus, 1758) [WoRMS]
Marine/Coastal | | Author keywords | AHL degradation; Enrichment culture; First-feeding turbot larvae; Scophthalmus maximus; Gut colonization; Residual AHL concentration |
| Authors | | Top | - Tinh, N.T.N., more
- Yen, V.H.N.
- Dierckens, K., more
| | |
| Abstract | Two N-acyl homoserine lactone (AHL) degrading enrichment cultures (EC3 and EC5), originating from the microbial community of the Penaeus vannamei shrimp gut, were incorporated into first-feeding turbot larvae through addition to the rearing water and/or bio-encapsulation in rotifers, prior to their feeding to the turbot larvae. Both ECs were able to colonize the larval gut and to persist up to five days after their addition was discontinued. However, only EC5 was effective in improving turbot larvae survival under the experimental conditions, i.e. when the survival of turbot larvae was compromised through the daily addition of AHL molecules (1 mg l-1). The latter treatment reduced the survival to 5.9% or 10.4% dependent on the experiment (while in the control treatment, the survival was 35% and 92.1%, respectively). Through the addition of EC5, the effect of AHL could be nullified. There was a strong negative correlation between the residual AHL concentration in the water and the larval survival on the last day. The negative effect on turbot larval survival might be caused by AHL-induced in situ production of virulence factors by uncharacterised opportunistic bacteria, while EC5 can counteract this effect. These results suggest that quorum sensing interference might become part of novel non-antibiotic based strategies to overcome high mortalities in the industrial larval production of marine fish. |
|
