Nutritional Characteristics of Black Rockfish (Sebastes schlegeli) Fed a Diet of Fish Skin
- *Corresponding Author:
- Jae-Ho Hwang
College of Fisheries and Ocean Sciences
Chonnam National University
Yeosu 550-749, Korea
E-mail: [email protected]
Received Date: April 28, 2014; Accepted Date: June 19, 2014; Published Date: June 29, 2014
Citation: Rha SJ, Cho JK, Kim SJ, Park WM, Shin TS, et al. (2014) Nutritional Characteristics of Black Rockfish (Sebastes schlegeli) Fed a Diet of Fish Skin. JAquac Res Development 5:239 doi:10.4172/2155-9546.1000239
Copyright: © 2014 Rha SJ, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
This study investigated the effects of diets substituted with different levels (0, 5, 10, and 20%) of flounder skin meal (FSM) on the nutritional composition of black rockfish Sebastes schlegeli. Fish (10.05 ± 0.44 g) were fed to apparent satiation twice daily for 8 weeks. Adding FSM decreased crude lipid levels and increased crude protein and ash. The abundant fatty acids in the FSM-added group were C16:0, C18:1-cis (n9), and C22:6n-3. The major amino acids in the samples were glutamic acid, aspartic acid, glycine, leucine, alanine, lysine, and arginine. The abundant free amino acids in the FSM-added group were taurine, glutamic acid, alanine, leucine, and arginine. Six free sugars were found in all groups. Glucose was predominant, followed by mannose, rhamnose, fucose, fructose, and ribose. Among the three organic acids in the whole body of black rockfish, lactic acid was predominant, followed by citric acid and oxalic acid. Total organic acid content in the control was significantly higher than those of FSM substitution groups.