PDF(Pubmed)
Abstract：
Two separate feeding trials were undertaken to benchmark a series of commercial diets and determine the nutrient and energy apparent digestibility coefficients of a variety of protein-based feed ingredients when fed to sobaity seabream, Sparidentex hasta. In Experiment 1, triplicate groups of fish (initial body weight: 330.5 ± 2.6 g) were fed with one of three locally available diets containing crude protein (CP) levels ranging from 44 to 46% of dry matter (DM), each with ~12% crude fat. Fish grew at around 3.2 g day-1 with a specific growth rate (SGR) of 0.7% day-1. Both the feed conversion ratio (FCR) and protein efficiency ratio (PER) were significantly better in fish fed diets, which contained the highest (46.4%) crude protein level. Overall, the data from these preliminary studies suggest that the best performance by sobaity seabream was obtained with a diet containing 46% crude protein, 20 MJ/kg, and a protein-to-energy ratio of 23 mg/kJ. In Experiment 2, fish with an initial body weight of 319 ± 7 g were held in 11 tanks and fed reference (D1) and test diets (D2-D11) for 7 days before fecal collection. This process was repeated twice in a blocking arrangement to generate three replicates. Each of the ten test diets contained 30% of a test ingredient, with the remaining 70% proportionally identical to the D1 diet. Diet apparent digestibility coefficients (ADCs) were measured, and the diet ADCs were then used to derive the protein and energy ADCs for the individual test ingredients. Ingredient protein ADC ranged between 75.5 and 93.9%, while ingredient energy ADC ranged between 66.8 and 81.2%.
摘要：
进行了两次单独的饲喂试验，以对一系列商业饮食进行基准测试，并确定了饲喂sobaityseabream时各种基于蛋白质的饲料原料的营养和能量表观消化率系数。Sparidentexhasta.在实验1中，一式三份鱼组（初始体重：330.5±2.6g）饲喂三种本地可用饮食之一，其中粗蛋白（CP）水平占干物质（DM）的44％至46％，每个都有~12%的粗脂肪。鱼在第1天大约3.2g时生长，比生长速率（SGR）为第1天0.7％。饲料转化率(FCR)和蛋白质效率比(PER)均显著优于鱼饲料,其中含有最高(46.4%)的粗蛋白水平。总的来说,这些初步研究的数据表明，sobaityseabream的最佳性能是通过含有46％粗蛋白的饮食获得的，20MJ/kg,蛋白质能量比为23mg/kJ。在实验2中，将初始体重为319±7g的鱼放在11个罐中，并在粪便收集前饲喂参考（D1）和测试饮食（D2-D11）7天。该过程在封闭布置中重复两次以产生三次重复。十种测试饮食中的每一种都含有30%的测试成分，其余70%与D1饮食成比例相同。测量饮食表观消化率系数(ADC)，然后使用饮食ADC来获得各个测试成分的蛋白质和能量ADC。成分蛋白ADC介于75.5和93.9%之间，而成分能量ADC介于66.8％至81.2％之间。
