Effect of an alcohol extract from a defatted soybean meal supplemented with a casein-based semi-purified diet on the biliary bile status and intestinal conditions in rainbow trout Oncorhynchus mykiss (Walbaum)

Abstract

A feeding experiment was conducted to examine the e¡ect of a supplemental ethanol extract from a defatted soybean meal on the biliary bile status and intestinal conditions of rainbow trout Oncorhynchus mykiss. A semi-puri¢ed control diet based on casein (Cont) and three diets supplemented with the extract (ES), bovine bile salts (BS) and their combination (ESBS) were fed to trout (10 g) for 6 weeks. The growth, feed e⁄ciency ratio, fat digestibility and gallbladderand hepato-somatic indices of ¢sh fed diet ES decreased. Compared with this group, these parameters were improved in ¢sh fed diet ESBS. The total biliary bile salt content was the lowest in ¢sh fed diet ES and this group had a high proportion of chenodeoxycholyltaurine. The inclusion of the bile salts to diet ES (diet ESBS) increased the total biliary bile salt content. A similar trend was observed in the bile salt concentration of intestinal digesta. Although morphological changes occurred in epithelial cells of the distal intestine of ¢sh fed diet ES, the histological features of ¢sh fed diet ESBS were similar to those of ¢sh fed diet Cont. These results indicate that alcohol-soluble substances of soybean meal cause physiological changes in the biliary bile and intestine of rainbow trout.

Influence of soya saponin, soya lectin, and cholyltaurine supplemented to a casein-based semipurified diet on intestinal morphology and biliary bile status in fingerling rainbow trout Oncorhynchus mykiss

“…In rainbow trout fed a SBM-based diet [4] or a casein-based diet supplemented with an alcohol extract from SBM [19], supplementation of C-tau [4] and bovine gall powder [19] increased the total biliary bile acid contents to much higher levels than in fish fed fish-meal-based and casein-based control diets. However, the bile acid concentrations in the intestinal digesta of fish fed the diets supplemented with C-tau [4] and bovine gall powder [19] were lower than in the control diet groups in the above experiments [4,19]. A precise investigation of the relationship between tissue morphology and biliary and intestinal bile status of rainbow trout fed SBM and soybean ANFs is necessary.…”

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 )

“…Low‐lipid digestibility has been previously reported when SBM was included in the diets of rainbow trout (Watanabe, Pongmaneerat, Sato, & Takeuchi, ) and yellowtail (Nguyen et al, ). Alcohol‐soluble components in soy products affect lipid digestibility (Olli, Hjelmeland, & Krogdahl, ), and the removal of these components increases their digestibility in rainbow trout (Yamamoto et al, ) and yellowtail (Nguyen et al, ). Despite the fact that SPC is generally manufactured using aqueous alcohol extraction (Peisker, ), reduced lipid digestibility has still been reported when the level of SPC in feeds is increased (Mambrini, Roem, Carvedi, Lalles, & Kaushik, ; Ustaoglu & Rennert, ).…”

Administration of host‐derived probiotics does not affect utilization of soybean meal enriched diets in juvenile turbot (Scophthalmus maximus)

“…However, plant products often include indigestive substances called anti-nutritional factors (ANF) that exert adverse effects on fish and may even cause severe nutritional disorders in livestock (Francis, Makkar, & Becker, 2001;Gatlin et al, 2007;Zhou et al, 2018). Several studies have reported on the adverse effect of high dietary levels of soybean products in various fish species including salmonids (Baeverfjord & Krogdahl, 1996;Rumsey, Siwicki, Anderson, & Bowser, 1994;Yamamoto et al, 2008), common carp (Urán et al, 2008), zebrafish (Hedrera et al, 2013) and turbot (Bai, Gu, Xu, Xu, & Krogdahl, 2017;Bonaldo et al, 2015;Gu, Bai, Zhang, & Krogdahl, 2016). Here, specifically SBM has been proven to induce proliferative or inflammatory conditions in the distal intestinal mucosa of farmed finfish (Gu et al, 2016).…”