Seriola lalandi Larviculture with Probiotic Supplements in Mesocosm Systems

Abstract

Abstract:The present study evaluated the survival of S. lalandi larvae cultivated in a mesocosm system (50 m 3 pool) and inoculated in submerged PVC cages with mesh walls and bottom (450 µm Swiss Nylon). The larvae were fed rotifers and artemia supplemented with the probiotic bacterium Pseudoalteromonas sp. SLP1 and the microalga Nannochloropsis gaditana. Larval survival was evaluated at the stage prior to changing the diet from live feed to pellets. Three months after feeding of the larvae with pellet, the growth (length/weight) and the specific growth rate (SGR) of the larvae supplemented with probiotics were recorded in the initial phase of the culture versus those not treated with probiotics. Higher survival was observed in larvae fed the probiotic supplement than in the control larvae (t-test=4.896, p<0.05). Larval growth in control and treatment increased, with significant differences observed during the three months. The SGR index did not present significant differences between the contol and treatment. These data indicate that after 3 months there were no differences in the growth of fish supplemented with or without probiotics. The results indicate that the addition of the microalga N. gaditana and the probiotic bacterium Pseudoalteromonas sp. SLP1 in the live feed, such as rotifers and artemia, is a good dietary alternative and improves the survival of S. lalandi larvae. The use of probiotics to optimize cultivation systems serves as an example of an ecological remediation alternative that can be applied to other cultures of commercial interest.

The ontogeny of greater amberjack digestive and antioxidant defence systems under different rearing conditions: A histological and enzymatic approach

“…The intensive rearing conditions and the feeding protocol used are an adaptation from the established methods in Mediterranean hatcheries, whereas the semi‐intensive methods that allow the use of wild plankton seem to be more appropriate for the culture of this species (Papandroulakis et al., 2005). Although there exist several studies describing larval development in other carangid species (Carton, 2005; Martínez‐Montaño, González‐Álvarez, Lazo, Audelo‐Naranjo, & Vélez‐Medel, 2016; Plaza, Leyton, Sayes, Mejias, & Riquelme, 2017; Stuart & Drawbridge, 2011 among others), there is missing information about greater amberjack. In addition, species‐specific conclusions cannot be drawn from the above‐mentioned studies in order to be applied on greater amberjack larviculture, since each species presents its own developmental patterns and requirements that need to be individually defined.…”

Probiotic Bacteria as an Healthy Alternative for Fish Aquaculture

“…The results showed that the addition of the N. gaditana microalgae rich in fatty acids and the probiotic bacterium Pseudoalteromonas sp. (SLP1-MESO) inoculated in live food of rotifers and Artemia improved the survival of S. lalandi larvae(Figure 6), making it a good dietary alternative to optimize larval survival of this species, being able to be applied to other crops of interest commercial[69].…”