High taurine supplementation in plant protein-based diets improves growth and organoleptic characteristics of European seabass (Dicentrarchus labrax)

Abstract

Plant-based proteins are increasingly being used in aquafeeds, but one of the limitations is taurine deficiency that can be especially detrimental for carnivorous fish. In this study, taurine supplementation in high plant protein diets (low fish meal, 15%) was investigated on the growth performance and fillet organoleptic characteristics of European seabass ( Dicentrarchus labrax ), juveniles (78 ± 0.4 g). Five diets were formulated to contain 0 (C−), 5 (T5), 10 (T10) or 20 (T20) added taurine (g/kg), while a control diet (C+) included two-fold higher amount of fishmeal (30%) with no taurine supplementation. Seabass fed the T20 or C+ diet showed similar growth, which was significantly higher compared to those in the C-treatment. Histological examination of the muscle, liver and intestine were similar among treatments. No effect on spoilage bacterial growth or production of total volatile basic nitrogen was observed. Taurine supplementation significantly reduced fillet drip loss, while the fillets of European seabass fed the T10 and T20 diets showed significant higher and lower hardness and adhesiveness values, respectively. Moreover, fillet chewiness was also found to be significantly higher in fish fed the T20 diet compared to C+ and C− diets. Overall, it seems that high dietary taurine supplementation acted as a growth promoter and concurrently improved significantly the postharvest quality characteristics of seabass, which may be attributed to its role in maintaining cell membrane integrity and permeability.

Taurine improves the growth performance, health status and liver histopathology of meagre (Argyrosomus regius) fed a reduced fish meal diet

“…Contrary to these studies, Kotzamanis et al (2020) reported that dietary taurine was not a histological change in the liver of European seabass (D. labrax). Also, the authors determined lipid accumulation within the hepatocytes in European seabass fed all experimental diets.…”

Combined Transcriptome and Metabolome Analysis of Musa nana Laur. Peel Treated With UV-C Reveals the Involvement of Key Metabolic Pathways

“…Seven DEGs annotated as cysteamine dioxygenases (enriched in taurine and hypertaurine biosynthesis metabolism) showed increased expression in UV-C treated banana peels as compared to CK. These genes are known for their role in enhanced plant survival under abiotic stresses (Licausi et al, 2011) by increasing the biosynthesis of taurine (Kotzamanis et al, 2020). Hence, it is possible that UV-C treatment affected their expression in order to respond to changes in O 2 levels in peels, since cysteamine dioxygenases have also been shown to be sensitive to O 2 levels (White et al, 2018).…”

Continuous Culture of Auxenochlorella protothecoides on Biodiesel Derived Glycerol under Mixotrophic and Heterotrophic Conditions: Growth Parameters and Biochemical Composition

“…The fatty acid profile was evaluated according to the AOCS Official Method Ce 1c-89, while the amino acid composition of the algal biomass was analyzed after acid hydrolysis (6 N, 110 °C, 24 h) and derivatization by AccQ-Tag TM Ultra according to the amino acid analysis application solution (Waters Corporation, Milford, MA, USA), as described by Kotzamanis et al [ 19 ].…”