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New VitaBloom® product range: microalgae combined with probiotics for green water, rotifer nutrition, and live feed enrichment
* 1 , 2 , 1 , 1, 3 , 1 , 3 , 2 , 2 , 4 , 3, 5, 6 , 2, 7 , 8 , 8 , 1 , 2, 7 , 1 , 2, 7 , 1
1  Necton, S.A., Belamandil, 8700-152 Olhão, Portugal
2  Aquaculture Research Station, Portuguese Institute for the Ocean and Atmosphere (IPMA), 8700-305 Olhão, Portugal
3  University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
4  Aquaculture Research Station, Portuguese Institute for the Ocean and Atmosphere (IPMA), 8700-305 Olhão Olhão, Portugal
5  Centre of Marine Sciences (CCMAR), Campus de Gambelas, 8005-139 Faro, Portugal
6  GreenCoLab, Campus de Gambelas, 8005-139 Faro, Portugal
7  S2AQUA- Collaborative Laboratory for a Sustainable and Smart Aquaculture, 8700-305 Olhão, Portugal
8  Piscicultura do Vale da Lama Lda., 8600-258, Odiáxere, Portugal
Academic Editor: Elisabete Matos

Abstract:

The development of microalgae products to solve larviculture challenges is essential to advance the fast-growing aquaculture sector. Combining different microalgae and probiotics is a powerful tool to improve animal nutrition and enhance biological performance, resilience to pathogens, and fish stress coping abilities. Products were used with a green water technique, rotifer cultivation, and live feed enrichment (rotifers and artemia). VitaBloom® Green Water (VGW) was applied to Argyrosomus regius larviculture until weaning, and compared to live Nannochloropsis sp. (n=3). Larvae at 19 days post fertilization (dpf) showed a significant reduction in skeletal malformations affecting phenotypes (24%) compared to the control (50%), displaying similar survival (20dpf). Vibrionaceae (TCBS) in water also decreased (1.23Log10CFU/ml vs. 1.93Log10CFU/ml). The stress-inducing challenge of transportation was carried out post-weaning. Larvae cultured with VGW revealed higher survival (93.0±1.3%) compared with controls (68.2±18.3%). Rotifers were batch cultured with VitaBloom® Rotifers+ (VR) or a commercial product (CP). VR showed a significantly reduced decantation (0.16±0.03cm) and agglomeration (0.05±0.04%) compared to controls (0.28±0.07cm and 0.5±0.4%, respectively), significantly improving rotifer growth rate (266±16.7%) and amictic females (28.8±7.5%) compared to the CP (160±13.2% and 23.3±9.8%, respectively). Rotifers and artemia were enriched with VitaBloom® Enrich (VE) or a CP for Sparus aurata larviculture until weaning (n=4). Although there were no significant differences, larvae fed with live feed enriched with VE revealed 18.7±7.3% of larvae survival at weaning, while larvae fed with live feed enriched with the CP resulted in 15.5±7.7% survival at weaning. The synergetic effect of the three VitaBloom® products was tested in S. aurata larviculture until weaning compared to larvae cultured with three CPs (n=3). Larvae fed with VitaBloom® showed higher survival at weaning (11.0±2.3%) compared to controls (6.6±5.0%). These innovative, sustainable, and efficient products are essential in improving larvae survival, which constrains the productivity and growth of the vital aquaculture industry.

Keywords: Microalgae products; probiotics; green water, rotifers cultivation; enrichment; larviculture

 
 
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