Effect of fish oil replacement and probiotic addition on growth, body composition and histological parameters of yellowtail (Seriola dumerili)

Abstract

Fish (175 g of initial weight) were fed in triplicated groups with four diets formulated by 0% (FO 100), 75% (FO 25) and 100% (with and without probiotics, FO 0 and FO 0+) of fish oil replacement consisting of a mixture of linseed, sunflower and palm oils. After 109 days, growth and nutritional parameters were not affected by the treatment; however, fish fed with 0% of fish oil showed the lowest survival rate and without differences between the same diet with probiotics. As for biometric parameters, significant differences in the viscerosomatic index (VSI) were observed between fish fed the FO 0+ diet and the FO 100 and FO 25 diets. Results obtained from histological analysis did not detect inflammation in gut samples, while liver samples showed a remarkable steatosis in all four treatments. Total fish oil replacement produced a significant difference in the width of the lamina propria. The dietary inclusion of probiotics in the FO 0+ diet seems to favour a recovery of intestine histology. In addition, as fish oil substitution increased, the width of the lamina propria also increased. In conclusion, it is possible to affirm that the four diets administrated to Seriola dumerili did not compromise the correct development of the animals.

Assessing the Influence of Dietary Pediococcus acidilactici Probiotic Supplementation in the Feed of European Sea Bass (Dicentrarchus labrax L.) (Linnaeus, 1758) on Farm Water Quality, Growth, Feed Utilization, Survival Rate, Body Composition, Blood Biochemical Parameters, and Intestinal Histology

“…The use of probiotics is critical for improving the habitat for aquatic animals and increasing their performance while having no negative consequences for customers [27,28]. There is a lot of interest in using probiotics in fish as feed additives to improve feed values, nutrient absorption, gut microbial community [29][30][31], gut morphology, gut histology, production of lactic acid, and digestive enzymes and increase the available nutrients to the host [32][33][34][35][36]. Furthermore, they provide essential growth factors, vitamins, fatty acids, and amino acids [37].…”

Use of Bacillus Subtilis Probiotics as Non-Antibiotic Gut Modulator and Growth Promoter in Broiler Chickens

“…Probiotics are living microbes and after being supplementation to the feed, it maintains normal intestine commensal equilibrium. The probiotics has been reported to fortify the gut physiology including digestive and absorptive functions [8], which ultimately leads to obtain better growth and FCR in broilers [27,28], turkeys [29], Pigs [30], Sheep [31], Rabbits [32], Fishes [33], Canine [34] Goats [35] and in Cattle [36]. It has been studied that developed egg weight, size and mass in layers are associated with offering Probiotics [35,37], along with repressed cholesterol level in chickens [36,38].…”

Enhancement of Live Food Nutritional Status with Essential Nutrients for Improving Aquatic Animal Health: A Review

“…The requirements of HUFA in fish and crustaceans have been widely studied. The effects of dietary HUFA in the juveniles of golden pompano ( Trachinotus ovatus ) [ 29 ], yellowtail ( Seriola dumerili ) [ 30 ], Asian seabass ( Lates calcarifer ) [ 31 ], and Pacific white shrimp ( Litopenaeus vannamei ) [ 32 ] are among the most recently published studies.…”