Effects of dietary cysteamine addition to a plant-based diet on growth performance, body composition, hepatosomatic histological structure and metabolism of taurine synthesis in turbot (<em>Scophthalmus maximus</em> L.)
Date
2024
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
Volume
76
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
This present study was conducted to illustrate the effect of dietary cysteamine on feeding, growth, biochemistry composition, hepatosomatic histological structure and metabolism of taurine synthesis in juvenile turbot (Scophthalmus maximus L.) (2.0 ± 0.01 g) fed high plant protein diets. A fishmeal-based diet (72.5% FM) was designed as the control diet (DietFM). Four isonitrogenous and isolipidic diets consist of 14.0% FM, 23.0% soybean meal and 30.0% wheat gluten meal, which were formulated to substitute FM with 0.0%, 0.05%, 0.1% and 0.15% cysteamine hydrochloride (labeled as DietPP, DietCS-0.05%, DietCS-0.1% and DietCS-0.15% respectively). Fish were stochastically allocated into fifteen 200L tanks and fed twice daily (06:30 and 18:30) to apparent satiation for 9 weeks. Feed intake (FI) in fish-fed DietCS-0.05% was conspicuously higher than that in fish-fed DietPP (p<0.05), and no notable difference was discovered among fish-fed diets with cysteamine inclusion (p>0.05). No conspicuously upward trend was found with the increase of dietary cysteamine in FBW, SGR, WGR, FER, PER, and SR when there was a downward trend in CF, VSI, and HSI (p>0.05). A remarkable increase was discovered from 0.0% to 0.05% cysteamine inclusion in ash content (p<0.05) when no noticeable difference was observed among all the cysteamine inclusion groups in moisture, protein, and lipid content (p>0.05). Only the body taurine content showed a notable increase between fish-fed DietCS-0.05% and fish-fed DPP among the indexes of body taurine, liver taurine, and serum taurine content (p<0.05), whereas no notable difference was observed in hepatosomatic L-cysteine sulfinate decarboxylase (CSD) and cysteamine dioxygenase (CDO) activities among all the cysteamine inclusion groups (p>0.05). The cellular morphology and cell veins in the liver of fish-fed diets with cysteamine inclusion were clearer than those of fish-fed DPP. The results showed that 0.05% cysteamine addition in a high plant protein diet is optimal.
Description
Keywords
turbot, cysteamine, growth, CSD, CDO
Citation
Extent
Format
Geographic Location
Time Period
Related To
The Israeli Journal of Aquaculture - Bamidgeh
Related To (URI)
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.