Author(s): Guerreiro, Inês ; Magalhães, Rui ; Coutinho, Filipe ; Couto, Ana ; Sousa, Sara ; Delerue-Matos, Cristina ; Domingues, Valentina F. ; Oliva-Teles, Aires ; Peres, Helena
Date: 2018
Persistent ID: http://hdl.handle.net/10400.22/16094
Origin: Repositório Científico do Instituto Politécnico do Porto
Subject(s): Feed ingredients; Gut histomorphology; Intermediary metabolism; Macroalgae; Nutraceutics; Oxidative stress
The effect of a dietary incorporation of the seaweedsUlva lactucaandChondrus crispusas functional ingredients was evaluatedin gilthead seabream (Sparus aurata) juvenile growth, feed efficiency, muscle lipid composition, intermediary metabolism,oxidative status and gut histomorphology. Fish (15 g initial body weight) were fed with isoproteic (46%) and isolipidic (18%)diets with fish meal (FM) and plant feedstuffs (PF) (27:73 protein from FM:PF) as main protein sources (control diet). Three otherdiets were formulated similar to the control but including 5%U. lactuca,5%C. crispusor 2.5% of both algae (dietsUlva,Chondrusand Mix, respectively). Dietary incorporation ofUlvadid not affect growth performance (P> 0.05) while it leads tohigher muscleΣSFA (saturated fatty acids); and liver lipid peroxidation (LPO). Moreover, lower muscleΣPUFA (polyunsatu-rated fatty acids) and plasma glucose was observed. Dietary incorporation ofChondrusleads to lower growth; whole-body drymatter and lipid content; muscleΣPUFA andω3 fatty acids; and plasma glucose. In addition, higher muscleΣMUFA (mono-unsaturated fatty acids); and liver LPO was observed. Dietary incorporation of both algae (Mix) led to lower growth; whole-bodylipid content; muscleΣPUFA andω3 fatty acids; plasma glucose; and hepatic PK (pyruvate kinase) and HOAD (3-hydroxyacyl-CoA dehydrogenase). Furthermore, it leads to higher muscleΣSFA andΣMUFA; and liver LPO. Overall, no beneficial effects ofincluding the tested seaweeds in the diets was observed, while oxidative status was negatively affected in all dietary treatments.
