Seamustard (<i>Undaria pinnatifida</i>) Improves Growth, Immunity, Fatty Acid Profile and Reduces Cholesterol in Hanwoo Steers

Abstract

The study was designed to evaluate the effect of 2% seamustard (Undaria pinnatifida) by-product (SW) on growth performance, immunity, carcass characteristics, cholesterol content and fatty acid profile in Hanwoo steers. A total of 20 Hanwoo steers (ave. 22 months old; 619 kg body weight) were randomly assigned to control (basal diet) and 2% SW supplemented diet. Dietary SW supplementation significantly (p<0.05) improved average daily gain and gain:feed ratio as well as serum immunoglobulin G concentration. Chemical composition and quality grade of meat and carcass yield grades evaluated at the end of the trial were found to be unaffected by SW supplementation. Dietary SW significantly reduced meat cholesterol concentration (p<0.05). Dietary SW supplementation significantly reduced the myristic acid (C14:0) and palmitoleic acid (C16:ln-7) concentration, while SW increased the concentration of stearic acid (C18:0) and linolenic acid (C18:3n-3) compared to control (p<0.05). Dietary SW supplementation had no effect on saturated fatty acids (SFA), unsaturated fatty acids, poly unsaturated fatty acid (PUFA) or mono unsaturated fatty acid content in muscles. A reduced ratio of PUFA/SFA and n-6/n-3 were found in SW supplemented group (p<0.05). In conclusion, 2% SW supplementation was found to improve growth, immunity and fatty acid profile with significantly reduced cholesterol of beef.

Seaweeds: a sustainable feed source for livestock and aquaculture

“…Overall, the seaweed formulated diet was found to improve growth, immunity, and fatty acid profile and was helpful in reducing cholesterol levels in beef (Hwang et al, 2014). In another study, Or-Rashid et al (2008) reported that supplementing the diet with seaweed meal alters the ruminal trans-18:1 fatty acid and conjugated linoleic acid composition in cattle.…”

“…Supplemented diets adequately improved the rumen fermentation and digestion in cows and influenced the quality of milk and meat in cattle (Bendary et al, 2013;Hwang et al, 2014). In most of the studies, dietary inclusion of even a small amount of seaweed or its components enhanced the nutritional value of feed and improved the performance of the targeted animals.…”

“…These compounds are deposited into the muscle tissue and further enhance the quality and productivity of meat (Hwang et al, 2014). Supplemented meal potentially enhances the superoxide dismutase activity and increases the antioxidant capacity of both forage and grazing animals.…”

“…Hwang et al (2014) supplemented the basal diet with 2% U. pinnatifida seaweed and evaluated its effect on growth performance, immunity, carcass characteristics, cholesterol content, and fatty acid profile in Hanwoo steers. Hwang et al (2014) supplemented the basal diet with 2% U. pinnatifida seaweed and evaluated its effect on growth performance, immunity, carcass characteristics, cholesterol content, and fatty acid profile in Hanwoo steers.…”

Effects of <i>Ecklonia cava</i> as fucoidan-rich algae on growth performance, nutrient digestibility, intestinal morphology and caecal microflora in weanling pigs

“…Fucoidans are branched polysaccharide sulfate esters extracted from the cell wall of marine algae, containing l-fucose as one of the major monosaccharides [9] and they have been shown to have antibacterial [6], immunomodulating [10] and antioxidant [11] activities. Previous researches suggested that E. cava can be used as environment friendly substitutes for antibiotics in diets to improve growth in fishes [12] and the immune systems of animals [13]. However, as per our knowledge, not much work has been done to utilize E. cava as feed additive for pigs.…”