Effects of Dietary Protein Levels on Growth, Body Composition and Jematological Responses of Round Batfish, ＂Platax orbicularis＂

飼料中蛋白質含量對圓眼燕魚（Platax orbicularis）成長、體組成及血液指標之影響

張簡崇志(Tsung-Chih Changchien) ； 卓立超(Li-Chao Zhuo) ； 邱曼婷(Man-Ting Chiu) ； 林鈺鴻(Yu-Hung Lin)

《臺灣水產學會刊》 40卷4期 (2013/12) Pp. 267-274

https://doi.org/10.29822/JFST.201312_40(4).0005

摘要

本研究為探討圓眼燕魚稚魚（Platax orbicularis）之最適蛋白質需求量。實驗飼料設計五種不同蛋白質含量（24、30、36、42及42%），分別餵予初重4.45 ± 0.10 g之燕魚稚魚，每組飼料三重覆，於循環水系統中，控制水溫29 ± 1℃飼養六週。餵食實驗結束後，增重率及飼料效率以蛋白質含量 ≥ 42%兩組顯著最高（p ＜ 0.05），其次為36%蛋白質餵食組，再其次為30%蛋白質餵食組，以24%蛋白質餵食組最低。蛋白質效率及蛋白質蓄積率隨飼料蛋白質含量增加而隨之下降。燕魚餵食24%蛋白質飼料之紅血球計數及血球容積比低於其餘各組。當使用拐點法（broken-line model）迴歸分析，以增重率估算最適蛋白質需求量，顯示燕魚稚魚最適蛋白質需求量約為40%。

關鍵字

圓眼燕魚 ； 蛋白質 ； 成長 ； 體組成 ； 血液指標

並列摘要

The study was aimed to quantify the dietary optimum protein levels for juvenile round batfish, ＂Platax orbicularis＂. Experimental diets with five dietary protein levels (24, 30, 36, 42 and 48%) were each fed to triplicate groups of batfish (mean initial weight: 4.45 ± 0.10 g) in a recirculating rearing system maintained at 29 ± 1°C for 6 weeks. Weight gain and feed efficiency were highest (p ＜ 0.05) in fish fed diets with ≥42% protein, followed by fish fed the diet with 36% protein, then the fish fed the diet with 30% protein and lowest in fish fed the diet with 24% protein. Protein efficiency ratio and protein retention of the fish decreased with increasing the dietary protein level. Fish fed the diet with 24% protein showed lower red blood cell count and hematocrit values compared to other dietary treatments. When the broken-line model was employed, based on weight gain for estimating the dietary protein requirement, the optimum dietary protein level for maximum growth of juvenile round batfish is estimated to be 40%.

並列關鍵字

round batfish ； protein requirement ； growth ； body composition ； hematological responses