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| Content Provider | frontiers |
|---|---|
| Author | Barreto, André Silva, Andreia Peixoto, Diogo Fajardo, Carlos Pinto, Wilson Rocha, Rui J. M. Conceição, Luís E. C. Costas, Benjamín |
| Abstract | This study aimed at assessing the dietary protein requirement of Penaeus vannamei post-larvae (PL) in clear water recirculating aquaculture systems (RAS). Six microdiets were evaluated in triplicates (P34, P44, P49, P54, P58 and P63), formulated to contain 34 %, 44 %, 49 %, 54 %, 58 % and 63 % crude protein, respectively. Whiteleg shrimp PL (3.2 mg wet weight) were reared for 21 days in a clear water RAS at Riasearch Lda facilities. At the end of the feeding period, the optimal protein requirement was estimated at 47.1 %, 46.4 %, 47.2 % and 44.0 % for weight gain, RGR, FCR and survival, respectively. PL fed the P54, P58 and P63 diets achieved significantly higher final body weights than those fed P34. PL fed P34 showed significantly lower RGR and survival and significantly higher FCR values than those fed the remaining diets, suggesting that low protein diets may not be adequate to be used in this stage of shrimp development and/or for the clear water RAS husbandry conditions. Moreover, diet P34 seemingly reduced the overall antioxidant status of the PL when compared to P44, P49 and P54. On the other hand, the P34 diet seems to have stimulated the PL immune mechanisms when compared to P44, P49 and P54, possibly due to increased levels of fish and algae oil. Similarly, despite the good growth performances, a diet containing 63 % of protein also seemed to have compromised the overall shrimp PL antioxidant status and stimulate their immune system. Shrimp fed diet P54 showed an apparent overall superior antioxidant status when compared to the remaining diets, evidencing that using protein inclusion levels up to 54% in aquafeeds not only potentiates growth performances and survival but also can potentially be beneficial to the health status of P. vannamei PL grown in clear water RAS. Hence, results from this study suggest that a minimum of around 47 % of protein should be considered when tailoring microdiets for whiteleg shrimp PL grown in clear water RAS but inclusion levels up to 54 % can be used with benefits to the PL antioxidant status. |
| ISSN | 22967745 |
| DOI | 10.3389/fmars.2023.1172644 |
| Volume Number | 10 |
| Journal | Frontiers in Marine Science |
| Language | English |
| Publisher Date | 2023-05-12 |
| Access Restriction | Open |
| Subject Keyword | Penaeus vannamei Post-larvae Inert microdiets Clear water recirculating aquaculture system Whiteleg shrimp Protein requirements |
| Content Type | Text |
| Resource Type | Article |
| Subject | Global and Planetary Change Oceanography Ocean Engineering Aquatic Science Water Science and Technology |
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