Effects of dietary administration of two Patagonian probiotics on the zoeae I from the swimming crab Ovalipes trimaculatus

ANTONELA MARTELLI; MELANIA FERNANDEZ; CYNTHIA SEQUEIROS; BARÓN PEDRO

AQUACULTURE INTERNATIONAL

SPRINGER

Año: 2022

0967-6120

In this study, we analyzed the effects of supplying two alternative Patagonian-autochthonousprobiotic strains of Bacillus sp. and Lactococcus sp. or no probiotic at all (controltreatment) on the survival, stage duration, molting success to the next larval instar, andspeed of vertical displacement of the zoeae I of the southern surf crab Ovalipes trimaculatus,also considering two alternative methods for their administration: (i) direct inoculationinto the rearing seawater or (ii) bio-encapsulation in Artemia persimilis nauplii. Bothprobiotic strains were effectively bio-encapsulated by the nauplii at high CFU x naupli−1. Probiotic inoculation in the rearing seawater improved the performance of the zoeae overthe control treatment and also outperformed bio-encapsulation. Bio-encapsulation in Artemianauplii resulted in lower survival and molting success to zoeae II compared to thecontrol treatment. No significant differences were observed between the mean effects ofeither one of the two probiotics. Overall, our results show that the direct inoculation of anyof both probiotics into rearing seawater improves the larval culture of the portunid crab.