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.
Previous Article in event
Next Article in event
New VitaBloom® product range: microalgae combined with probiotics for green water, rotifer nutrition, and live feed enrichment
Published:
07 March 2025
by MDPI
in The 3rd International Electronic Conference on Animals
session Sustainable animal nutrition
Abstract:
Keywords: Microalgae products; probiotics; green water, rotifers cultivation; enrichment; larviculture
