Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/24573
標題: 性別、飼養方式與填灌期間對土番鴨脂肪肝生成之影響
Effects of Sex,Feeding Regimes and Force-fed Duration on Fatty Liver Production of Mule ducks
作者: 張忠偉
Chung, Chang Wei
關鍵字: Mule duck
土番鴨
Fatty liver
Sex
Feeding regimes
脂肪肝
性別
飼養方式
出版社: 畜牧學系
摘要: 本試驗之目的,在探討性別、飼養方式與縮短填灌期間對土番鴨肥 肝生成及血液成分之影響,並進而尋求較佳之填灌方式。本試驗共分三個 子試驗進行,試驗一與試驗二中均使用10週齡之三品種土番鴨120隻(雄 雌各60隻),先依體重區分為籠飼與平飼(雄、雌各30隻),並在試驗開 始時再分成灌食組與填灌組。填灌期為3週,在填灌期間每週稱重與採集 血液,並於第3週採血後,犧牲鴨隻以採集肝臟、胸肉與腹脂;而試驗二 之填灌量較試驗一略高。試驗三使用10週齡之三品種雌土番鴨48隻,依體 重分為灌食組與對照組,並進行平飼之填灌試驗。填灌期為2週,而在填 灌之第6日、10日與14日,分別逢機犧牲部分鴨隻,以觀察肝重之變化。 在生產性狀方面,試驗一之結果顯示,籠飼土番鴨之死亡率較平飼組為高 (56% vs.12%),且雌土番鴨之死亡率亦高於雄土番鴨。平飼雌土番鴨 之肝重顯著較平飼雄土番鴨為重(277g vs. 214g);平飼雄土番鴨之飼 料換肝率顯著較籠飼雄土番鴨與平飼雌土番鴨為低(0.028 vs. 0.037,0.039),而平飼雄土番鴨之腹脂含量則顯著較籠飼雄土番鴨與平 飼雌土番鴨為重(148.5g vs. 132.6g,126.8g)。另外,灌食組鴨隻均以 第2週之體增重最多,而在平飼組雄雌土番鴨間與平飼、籠飼之雄土番鴨 間之增重則無顯著差異。試驗二之結果顯示,籠飼雌土番鴨之死亡率(24 %)較籠飼雄土番鴨(4.2%)與平飼雄及雌土番鴨(12.5%及8.0%)為 高;籠飼及平飼雌土番鴨之平均肝重(383g vs. 347g)顯著較雄土番鴨 (254g vs. 284g)為重,而籠飼及平飼雌土番鴨之飼料換肝率(0.043 vs. 0.036)顯著高於雄土番鴨(0.026 vs. 0.028);籠飼與平飼雄土番 鴨之腹脂含量(199.7g vs.206.5g)顯著較雌土番鴨(143.8g vs. 167g )為高;平飼及籠飼土番鴨亦以第2週之體增重最多,並以雄土番鴨之體 增重較雌土番鴨為高。在試驗三中,當填灌期縮短為2週時,平均肝重與 填灌3週者相近(339g vs. 347g),而肝重大於300克之比例則較填灌3週 者為低;惟體增重、飼料換肝率與飼料效率則以填灌2週者較佳,然其死 亡率則較填灌3週者略高(8.8% vs. 8.0%)。 在血液性狀方面,試 驗一與試驗二之結果顯示,灌食組鴨隻之血清總脂質、三酸甘油酯與總膽 固醇之濃度均顯著較對照組為高,且灌食組鴨隻之血清總脂質、三酸甘油 酯與總膽固醇濃度均隨處理週別之增加而漸增。此外,試驗一平飼雌土番 鴨與籠飼雄土番鴨在填灌後第2、3週,其血清總脂質、三酸甘油酯與總膽 固醇濃度即顯著較平飼雄土番鴨為高,而試驗二平飼與籠飼雌土番鴨在填 灌後1週,其濃度即顯著較雄土番鴨為高。試驗一與試驗二填灌組鴨隻之 血清總蛋白質濃度,隨處理週別之增加而先升高後降低;血清鈉、鉀、氯 、離子鈣濃度與pH之變化,以鉀及氯離子之變化較一致,而灌食組鴨隻之 血清鉀離子濃度皆較對照組為高,惟氯離子濃度則較對照組為低。另外, 在試驗一與試驗二中,灌食組鴨隻之血清蛋白質電泳比例結果,以α2球 蛋白比例變化較大,且隨處理週別之增加而漸增。 在肝臟成分方面, 試驗一與試驗二灌食組鴨隻之肝臟總脂質與三酸甘油酯濃度均顯著較對照 組為高,且以雌土番鴨之濃度顯著高於雄土番鴨。此外,試驗一與試驗二 灌食組鴨隻之肝臟蛋白質濃度顯著較對照組為低,且灌食組雌土番鴨之濃 度亦顯著低於雄土番鴨。
The purpose of this study was cnducted to investigate the effects of sex,feeding regimes and force-fed duration on fatty liver production and constituents of blood in mule ducks. The study was divided into three trials. One hundred and twenty mule ducks (60 male and 60 female) of 10 weeks old were bought from a commercial duck farm. Ducks were weighed individually and allotted to cage(30 male and 30 female) and floor-pen (30 male and 30 female)groups in trial one and two. Flowing the adaptive period, ducks of cage and floor-pen groupswere divided into control (5 male and 5 female) and force feeding (25 male and 25 female) group respectively. The feoce-fed duration was three weeks.During the experimental period, body weight were recorded and blood samples were collected weekly. At the end of experiment, ducks were scarificed and theliver, breast muscle and abdominal fat samples were collected. The volume of trial one was less than those in trial two. In trial three, forty- eight femalemule ducks of 10 weeks old were bought from a commercial duck farm. After twoweeks of adaptive period, ducks were divided into control (15 ducks) and forcefeeding (33 ducks) groups. Ducks of trial three were kept under floor-pen and the force-fed duration was two weeks. Some ducks were sacrificed at 6, 10, 14days after force feeding and the liver were collected. The results of trial one indicated that the mortality of ducks in cage groupwere higher than those in floor-pen group, while the mortality of female ducks were higher than those in drakes of force feeding groups. The liver weight of female ducks at floor-pen group were significant heavier than those in drakes at floor-pen group (277g vs. 214g). Feed conversion rate of force feeding drakesat floor-pen group were significant lower than those in drakes at cage group and female ducks at floor-pen group (0.028 vs.0.037,0.039). The weight of abdominal fat in force feeding drakes at floor-pen group were significant heavier thanthose in drakes at cage group and female ducks at floor-pen group. In addition,the body weight gain of force feeding ducks at the 2nd week were higher than the other weeks, and the body weight gain between different sex at floor-pen group and between drakes at cage and floor-pen group were no significnat different.The results of trial two indicated that the mortality of force feeding female ducks at cage group were higher than those of other groups. The average liverweight and feed conversion rate of force feeding female ducks at cage and floor- pen group were significant higher than those of force feeding drakes (383g vs.347g and 254g vs. 285g, 0.043 vs. 0.036 and 0.026 vs. 0.028). The abdominal fatweight of force feeding drakes at cage and floor-pen group were significant heavier than those of force feeding female ducks. The body weight gain of forcefeeding drakes at cage and floor-pen group were heavier than those of force feeding female ducks, and the body weight gain at the 2nd week in force feeding female ducks in floor-pen group and drakes at cage and floor-pen group were significant higher than those of the other weeks. While force feeding duration changed from three weeks to two weeks, the average liver weight were no significant difference. The ratio of liver weight above 300g in force feeding for two weeksgroup was lower than those in three weeks group, but the body weight gain, feedefficiency and feed conversion rate in force feeding for two weeks group were better than those in three weeks group. Besides, the mortality in force feeding for two weeks groups were higher than those in three weeks group. Serum total lipid, triglyceride and cholesterol concentrations of force feeding groups in trial one and two were significant higher than those in controlgroups, and the concentrations of serum total lipid, triglyceride and cholesterol in force feeding groups increased with prolonged treatment duration. The concentrationsof serum total lipid, triglyceride and cholesterol of female ducks at floor-pengroup and drakes at cage group were significant higher than those in drakes atfloor-pen group during the 2nd and 3rd week in the trial one. In trial two, the concentrations of serum total lopid, triglyceride and cholesterol of force feedingfemale ducks at floor-pen and cage groups were significant higher than those of drakes after the first week of treatment. Serum tatal protein concentrationsof force feeding groups in the trial one and two significant increased at first week,but decreased thereafter. Changes of serum potassium and chloride concentrationswere more evident than those in the sodium, ionized calcium and pH. The concentrationsof serum potassium in force feeding groups were higher than those in the control groups, while the concentrations of chloride in force feeding groups were lowerthan those in the control groups. The results of serum protein electrophoresis in trial one and two showed that changes of α2-globulin ratio were more evidentthan those in the other constituents and it increased with prolonged treatmentduration. In trial one and two, the concentrations of liver total lipid and triglyceridein force feeding groups were significant higher than those in control groups, while the liver total lipid and triglyceride concentrations of female ducks in force feeding groups were significnat higher than those in drakes. Furthermore,the concentrations of liver protein in force feeding groups were significnatlower than those in control groups, while the liver protein concentrations of female ducks in force feeding groups were significant lower than those in drakes.
URI: http://hdl.handle.net/11455/24573
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