Effects of Haematococcus pluvialis supplementation on antioxidant system and metabolism in rainbow trout (Oncorhynchus mykiss)

Abstract

Effects of commercial source for astaxanthin (Haematococcus pluvialis) (H.p) on antioxidant power, specific marker enzymes, and some metabolites were examined in rainbow trout (Oncorhynchus mykiss). Fish were fed on diets containing 1, 3, and 10 g microalga kg(-1) feed for 30 days. Serum total antioxidant activity and lipid peroxidation product, indicated by malondialdehyde (MDA), significantly enhanced with different doses of administration, indicating the elevated antioxidant status in all treatment groups. In group fed with high dose of alga, significantly elevated aspartate aminotransferase activity (AST) was noted, indicating damage of normal liver function in this group. Alkaline phosphatase (ALP) and alanine aminotransferase (ALT) were not affected in all groups. Although serum total protein remained unaffected, serum glucose level was decreased significantly in lower doses of administration. Furthermore, triglyceride and cholesterol levels showed significant decrease in 3 g kg(-1) microalga group by modulation of lipid metabolism in this group. On the other hand, in highest dose, significant increase in lipids was observed, indicating the slight dysfunction in lipid metabolism in this treatment group. The present study suggests that Haematococcus pluvialis especially in dose of 3 g kg(-1) feed administration may effectively enhance the antioxidant system and some biochemical parameters in rainbow trout.

Dietary carbohydrate/lipid ratios affect stress, oxidative status and non-specific immune responses of fingerling blunt snout bream, Megalobrama amblycephala

“…GOT and GPT are quantitatively the most important aminotransferases in fish. Both enzymes are extensively investigated in fish stress and health studies, and are commonly recognized as a valuable tool for indications of tissue damage [18,53]. In the present study, the lowest plasma GOT and GPT activities were both found in fish fed a CHO:L ratio of 5.64.…”

Effects of dietary lipid levels on growth, feed utilization, body composition, fatty acid profiles and antioxidant parameters of juvenile chu’s croaker Nibea coibor

“…ALT and AST are commonly known as the crucial amino transferases in fish and normally are used as helpful indicators of liver damage in fish health studies (Hemre et al 1996;Sheikhzadeh et al 2012;Rao 2006;Wang et al 2014). D15 led to significant higher ALT activity compared to other groups, and 15 % dietary lipid seemed to do more harm to liver than the control diet do in our study.…”

Tetraselmis chuii biomass as a potential feed additive to improve survival and oxidative stress status of Pacific white-leg shrimp Litopenaeus vannamei postlarvae

“…High supplementation of dietary antioxidant caused a reduced need for the endogenous antioxidant enzyme (such as catalase and superoxide dismutase) in scavenging hydrogen peroxide (H 2 O 2 ) and superoxide radical (Lygren et al 1999). In accordance with the study by Sheikhzadeh et al (2012) and Da Silva et al (2015), supplementation of the high astaxanthin H. pluvialis into feed also leads to better performance with increased antioxidant activity in juvenile L. vannamei.…”