Effects of feeding a fish meal-free soy protein concentrate-based diet on the growth performance and nutrient utilization of red sea bream (Pagrus major )

Abstract

Two groups of red sea bream (average body weight 85 g) were fed to satiation fish meal (FM) or FM‐free soy protein concentrate (SPC)‐based diet (FM‐sat and SPC groups respectively). A third group (FM‐pair) was fed the same amount of FM as of SPC fed to SPC‐sat group for 6 weeks. Growth rate of SPC group was significantly slower than of FM‐sat and FM‐pair groups (p < 0.05). Feed conversion ratios of FM‐sat and FM‐pair groups were similar and were better than that of SPC group (p < 0.05). Visceral fat somatic index of SPC group was significantly lower than of the other groups (p < 0.05), while that of the latter two groups were similar. Plasma triglyceride of FM‐sat and FM‐pair groups was similar and lower than the level of SPC group (p < 0.05). Trypsin activity in hepatopancreas of SPC group was significantly lower than that of other groups (p < 0.05). We suggest a low growth of SPC group was not simply related to low‐feed intake. Feeding of a FM‐free SPC‐based diet may reduce lipid accumulation and consequently lead to low‐growth performance, in red sea bream.

Effects of natural feeding stimulants and glutamic acid supplementation on the feed intake, growth performance and digestive enzyme activities of red sea bream ( Pagrus major ) fed fish meal‐free soy protein concentrate (SPC)‐based diet

“…The SGR and FCR of Basal‐ and FMH diets‐fed fish were significantly lower than those of FM diet‐fed fish following similar feed intake of the diets. The result is consistent with that of our previous study where we observed lower growth performance in fish fed with SPC‐based diet than in those fed with FM‐based diet by paired feeding (similar feed intake) (Tola et al, ). Conversely, lower growth performance observed following the feeding of SPC‐based diet was counteracted by increased feed intake, as demonstrated by the comparable growth induced by FMHG diet with a significantly higher feed intake.…”

“…Whole‐body lipid content at end of the feeding study tended to be lower in fish fed with SPC‐based diet, although the chemical composition was not significantly different except for ash content. Similarly, in our previous study on red sea bream, whole‐body lipid content in fish fed with SPC‐based diet was significantly lower than that in fish fed with FM‐based diet by paired feeding (equivalent DFR) (Tola et al, ). Low lipid digestibility has been previously reported when SBM was included in the diets of rainbow trout (Watanabe, Pongmaneerat, Sato, & Takeuchi, ) and yellowtail ( Seriola quinqueradiata ) (Nguyen, Khaoian, Fukada, Suzuki, & Masumoto, ).…”

“…Recently, we have shown that the low growth of SPC‐fed red sea bream was not simply due to the low feed intake (Tola, Fukada, & Masumoto, ). Moreover, the low growth was suggested to result from poor lipid digestion.…”

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

“…Researchers have attempted to reduce fish meal with plant protein feedstuff (PP) in aquafeed; nevertheless, the use of these PP in fish diets is hindered due to the presence of a diversity of antinutrient factors and indigestible carbohydrates (Gatlin et al, 2007; Hardy, 2010), reduction of apparent digestibility of coefficients (ADCs) especially for proteins, low palatability (Jannathulla et al, 2018; Mirzakhani et al, 2020) and deficiency in essential amino acids (Sabbagh et al, 2019; Tola et al, 2019).…”

Effects of dietary tuna hydrolysate supplementation on feed intake, growth performance, feed utilization and health status of Asian sea bass ( Lates calcarifer ) fed a low fish meal soybean meal‐based diet

“…Low feed intake was commonly recognized as a characteristic of fish fed with soybean-based diets, publishable reported in numeral carnivore fishes including rainbow trout, chinook salmon (Bureau et al, 1998), Asian sea bass (Ma et al, 2018;Tantikitti et al, 2005), spotted rose snapper (Lutjanus guttatus) (Silva-Carrillo et al, 2012), silvery-black porgy (Sparidentex hasta) (Yaghoubi et al, 2016) and red sea bream (Tola et al, 2019a(Tola et al, , 2019b). Decreased feeding rates of Asian sea bass fed with the LFM diet were possibly attributed to antinutritional factors in soybean meal.…”