Effects of different dietary levels of soybean protein hydrolysates on the growth performance, antioxidant capacity and relative mRNA expression levels of juvenile hybrid grouper ( Epinephelus fuscoguttatus ♀ × Epinephelus lanceolatus ♂)

Abstract

It is well accepted that protein is the most important component in feed for fish, which is essential to maintain the rapid growth of fish owing to growth promoters may derived from protein sources (NRC, 2011; Wilson, 2002). The economic cost of animal protein is too high because of its shortage, so there has been growing interest in plant protein as protein source (Hardy, 2010). Many studies have reported effect of plant protein sources in aquatic animals, including soybean meal (Wang et al., 2020), soy protein concentrate

Advances in practical feed formulation and adoption for hybrid grouper (Epinephelus fuscoguttatus♀ × E. lanceolatus♂) aquaculture

“…To this end, betaine, nucleotides and protein hydrolysates have all been demonstrated to improve feed intake. [109][110][111][112] Betaine and nucleotides are effective at increasing feed preference at dose rates of approximately 1 g 100 g −1 diet for E. fuscoguttatus 110,113 and can mitigate the appetite suppression evident when these fish are fed diets with 50% of the fish meal replaced with soya bean meal. 110 While effective, the commercial application at this dose rate is likely limited by cost of the additives.…”

“…Likewise, inclusion of soya bean protein hydrolysates at 2-6% in feeds for TGGG hybrid grouper resulted in significantly increased growth, albeit at a more modest 10% improvement in weight gain. 112 While the effects of other feeding stimulants on grouper have not been directly evaluated, yeast, shrimp and squid meals have become popular in experimental feeds, 49,97 presumably to enhance feed intake. Likewise, mixtures of amino acids, organic acids and nucleotides have been listed in recipes as attractants.…”

Effects of Dietary Glycerol Monolaurate on Growth, Antioxidant Capacity and Lipid Metabolism in Cage-Farmed Pompano (Trachinotus ovatus) Juveniles

“…Different doses of GML were weighed and completely dissolved in sterile water, respectively. All raw material was crushed through a 60-mesh sieve, mixed through a V-type vertical mixer (JS-14S; Zhejiang Zhengtai Electric Co., Ltd.), followed by adding with oil and water, and then pelleted (2.5 mm diameter) making use of a double screw extruder (F-75; South China University of Technology) (Song et al, 2010;Liang et al, 2020a). After the prepared experimental feed was naturally dried to about 10% moisture, it was sealed in a vacuum-packed bag and stored at -20°C until it was fed (He et al, 2021;Lin et al, 2021a).…”

A Challenge to Conventional Fish Meal: Effects of Soy Protein Peptides on Growth, Histomorphology, Lipid Metabolism and Intestinal Health for Juvenile Pompano Trachinotus ovatus

“…The total antioxidant capacity (T-AOC) was measured by Yang et al (2017). The malondialdehyde (MDA) content was determined as described by Liang et al (2020a) and Lin et al (2020). The acid phosphatase (ACP) and alkaline phosphatase (AKP) were determined following Zhu et al (2012) and Zhu et al (2021).…”

“…Peptides as feeding materials have been widely studied. Peptides can strengthen the immune system, reduce feed coefficient rate, and accelerate protein synthesis (Liang et al, 2020a;Wang J.X. et al, 2020).…”