Ability of European seabass (Dicentrarchus labrax) to digest rendered animal fats from fish, poultry and mammals

Abstract

This study evaluates the in vivo apparent digestibility coefficients (ADC) of rendered animal by‐product fats in European seabass (Dicentrarchus labrax) juveniles. Diets contained fish oil (FOd), poultry fat (PFd) or mammal fat (MFd), from rendering animal by‐products, at 140 g/kg. Macronutrient and fatty acids ADCs were evaluated in quadruplicate tanks with fifteen 100 g fish. While total lipids ADCs (88%–90%) were unaffected, individual fatty acids ADC varied significantly among diets. Monounsaturated fatty acids ADCs were similar (94%–95%), saturated fatty acids ADCs were lowest in MFd (85% vs. 91% in PFd and FOd), and polyunsaturated fatty acids (PUFA) ADCs were lowest in PFd (96 vs. 97%–98%). Total n‐3 PUFA were better digested in FOd than in the other diets (98 vs. 96%–97%), while MFd had the highest total n‐6 PUFA ADC. FOd showed significantly higher EPA (20:5n‐3) and DHA (22:6n‐3) ADCs compared to the other test diets. The obtained results suggest that rendered animal fats can be considered feasible alternatives to fish oil in seabass. Nevertheless, that lack of EPA and DHA in land animal fats, combined with the reduced digestibility of these fatty acids, may compromise its dietary inclusion at high levels.

The feasibility of partial replacement fish meal with poultry by‐products in practical diets of juvenile great sturgeon, Huso huso : Effects on growth performance, body composition, physiometabolic indices, digestibility and digestive enzymes

“…Numerous authors pointed it out, the substitution of FM by PBM resulted in attenuated growth performance in different species due to inferior feed intake, low levels of dietary lysine and methionine, high lipid contents but relatively free PA (20:5n‐3) and DHA (22:6n‐3) that lead to steatosis in hepatocytes with an irregular shape (Campos et al, 2019; Fuertes et al, 2013; NRC, 2011; Sabbagh et al, 2019; Zhu et al, 2011). Galkanda‐Arachchige et al (2019) postulated that copious freshwater fish species tolerate PBM in the diet compared to marine fish species without an issue.…”

“…The replacement of FM with PBM has been appraised in copious of aquatic species likewise sunshine sass, Morone chrysops × M. saxatilis (Stuttgart et al, 2008), Pacific white shrimp, Litopenaeus vannami (Ye et al, 2011), juvenile cobia, Rachycentron canadum (Zhou et al, 2011), Florida pompano, Trachinotus carolinus L. (Rossi & Davis, 2012), juvenile rainbow trout, Oncorhynchus mykiss (Parés-Sierra et al, 2014), juvenile crayfish, Pacifastacus leniusculus (Fuertes et al, 2013), Atlantic salmon, Salmo salar (Hatlen et al, 2015), tench, Tinca tinca (Panicz et al, 2017), giant croaker, Nibea japonica (Wu et al, 2018), juvenile gilthead seabream, Sparus aurata (Sabbagh et al, 2019), European seabass, Dicentrarchus labrax (Campos et al, 2019) and Siberian sturgeon, Acipenser baerii (Mirzakhani et al, 2020).…”

Influence of some natural preservatives in controlling the shelf -life of sea bass (Dicentrarchus labrax) during cooled storage

“…Seafood is a respected portion of human food, because of it's contented of polyunsaturated fatty acids (PUFA), besides protein (Pezeshk et al, 2015, Kazeml and Rezael 2015, FAO 2018and Houessou et al, 2019. PUFA of these products have developed attention because of the protection of human cardiovascular (Ozogul et al, 2006, Campos et al, 2019and Hematyar et al, 2019. However, synthetic antioxidant have to be widely applied due to fat oxidation (Benjakul et al, 2005 andPrato et al, 2019).…”