Growth performance and physiological response of African catfish, Clarias gariepinus (B.) fed organic selenium prior to the exposure to environmental copper toxicity

Nutritive Value of Diets Containing Digeston-1 as a Feed Additive for Nile Tilapia (Oreochromis niloticus) Fingerlings

“…Moreover, Digeston-1 supplementation had no significant effect (P>0.05) on aspartate aminotransferase (AST) and alanine aminotransferase (ALT) concentrations compared with unsupplemented group. Biochemical analyses such as blood chemistry analyses often provide vital information aiding the diagnosis for health assessment and management of cultured fish [35][36][37]. These results confirm previous findings by Abdel-Tawwab et al [38][39][40] that biochemical parameters were improved in fish fed probiotic during their study on the use of commercial probiotic as a growth and immunity promoter for Nile tilapia.…”

The effects of dietary selenium on growth performances, oxidative stress and tissue selenium concentration of gibel carp (Carassius auratus gibelio)

“…The positive relationships between GPx activities and tissue Se concentrations have been reported in rainbow trout (Hilton et al 1980;Ku¨c¸u¨kbay et al 2009), channel catfish (Gatlin & Wilson 1984), grouper (Lin & Shiau 2005) and African catfish (Abdel-Tawwaba et al 2007). This is in accordance with the present results of a linear regression relationship between hepatic GPx activity and hepatic Se concentration or whole body Se concentration in gibel carp.…”

“…Various forms of Se have different bioavailability (Wang & Lovell 1997) and this affects the Se requirement for fish. The forms of Se used in two earlier studies (Hilton et al 1980;Gatlin & Wilson 1984) were sodium selenite, whereas Lin & Shiau (2005) and Abdel-Tawwaba et al (2007) adopted organic Se as in this study. The waterbone Se concentration in the two earlier studies ranged from 0.4 to 2.5 lg Se L )1 , whereas Se concentration of the rearing water in the recent two studies was not detectable.…”

“…The waterbone Se concentration in the two earlier studies ranged from 0.4 to 2.5 lg Se L )1 , whereas Se concentration of the rearing water in the recent two studies was not detectable. The interaction between dietary vitamin E and Se affects the Se requirement for fish (Lin & Shiau 2005;Abdel-Tawwaba et al 2007). Dietary vitamin E concentration in the rainbow trout study was 400 mg kg )1 (Hilton et al 1980), which was much higher than the adequate vitamin E requirement for rainbow trout (Watanabe et al 1981).…”

Dietary tryptophan modulates intestinal immune response, barrier function, antioxidant status and gene expression of TOR and Nrf2 in young grass carp (Ctenopharyngodon idella)

“…In vertebrates, growth performance is partly associated with intestinal health status, which mainly depends on the intestinal immune response [60] and antioxidant capacity [61]. In fish, copper exposure after the feeding trial is a common model to study the effects of nutrients on the immune response [62] and antioxidant capacity [63]. The results from our laboratory Table 6 Quadratic regression analysis of dietary tryptophan (Trp) levels (g kg À1 diet) with the relative expression levels of interleukin 8 (IL-8) in the PI and DI, tumor necrosis factor a (TNF-a) in the MI and DI, transforming growth factor b1 (TGF-b1) in the DI, interleukin 10 (IL-10) and target of rapamycin (TOR) in all intestinal segments, as well as NF-E2-related factor 2 (Nrf2), Kelch-like-ECH-associated protein 1 (Keap1), glutathione peroxidase (GPx), zonula occludens 1 (ZO-1), occludin, claudin-b, -c, -3, -12, and -15a in the intestine.…”