当前位置: X-MOL 学术Aquacult. Int. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Growth performance and acoustic feeding behavior of two size classes of Litopenaeus vannamei fed pelleted and extruded diets
Aquaculture International ( IF 2.9 ) Pub Date : 2021-01-09 , DOI: 10.1007/s10499-020-00636-8
Roberta Soares , Silvio Peixoto , Harsha S. C. Galkanda-Arachchige , D. Allen Davis

This study aimed to compare the growth performance, food consumption, and acoustic feeding behavior of two size classes of Litopenaeus vannamei fed on extruded and pelleted diets. Two similar diets (35% crude protein) prepared by extrusion or pelletizing methods were offered to two shrimp size classes: small (3.83 ± 0.16 g) and large (10.28 ± 0.37 g). Shrimp were reared in 100-L aquaria (salinity 6 ppt, temperature 28 °C); growth performance and survival were analyzed at the end of 4 and 8 weeks for small and large size classes, respectively. Hydrophones recorded the sounds of shrimp feeding activity for 30-min intervals, after food remains were collected to evaluate consumption. Physical (pellet durability index, hardness, water absorption, density, sinking velocity, dry matter retention) and chemical (aromatic amino acids (AAA) leaching) characteristics of the diets were evaluated before and after soaking. Extruded diet presented higher durability and hardness before soaking, but its higher water absorption resulted in markedly texture softened and higher AAA leaching. Both shrimp size classes presented no significant differences in final mean weight, biomass, weight gain, survival, food conversion, and food consumption between pelleted or extruded diets. The mean acoustic energy did not differ between diets, but larger shrimp produced higher energy during feeding activity. The energy showed a significant progressive decrease along time intervals (10, 20, and 30 min) for both size classes and diets. Despite the different characteristics between pelleted and extruded diets, both resulted in similar shrimp performance and acoustic feeding profile activity under laboratory conditions.



中文翻译:

南美白对虾饲喂颗粒饲料和膨化饲料的生长性能和声学喂养行为

这项研究旨在比较南美白对虾的两个大小等级的生长性能,食物消耗和声学喂养行为以膨化和颗粒状饲料为食。通过挤压或制粒的方法将两种相似的日粮(35%的粗蛋白)提供给两种虾尺寸等级:小(3.83±0.16 g)和大(10.28±0.37 g)。将虾放在100升的水族馆中(盐度为6 ppt,温度为28°C);分别在4周和8周结束时分别对小型和大型课程的生长性能和存活率进行了分析。在收集剩余食物以评估食用量之后,水听器每隔30分钟记录一次虾喂食活动的声音。在浸泡之前和之后评估了日粮的物理(丸子耐久性指数,硬度,吸水率,密度,下沉速度,干物质保留)和化学(芳香族氨基酸(AAA)浸出)特征。挤压饮食在浸泡前表现出更高的耐久性和硬度,但其较高的吸水率导致质地明显软化和较高的AAA浸出。两种虾的大小等级在颗粒饲料或膨化饲料之间的最终平均重量,生物量,增重,存活率,食物转化率和食物消耗方面均无显着差异。不同日粮的平均声能没有差异,但是较大的虾在摄食过程中产生较高的能量。尺寸分类和饮食的能量均沿时间间隔(10、20和30分钟)显示出显着的逐步下降。尽管颗粒饲料和膨化饲料的特性不同,但在实验室条件下,两者的对虾性能和声饲料活动均相似。两种虾的大小等级在颗粒饲料或膨化饲料之间的最终平均重量,生物量,增重,存活率,食物转化率和食物消耗方面均无显着差异。不同日粮的平均声能没有差异,但是较大的虾在摄食过程中产生较高的能量。尺寸分类和饮食的能量均沿时间间隔(10、20和30分钟)显示出显着的逐步下降。尽管颗粒饲料和膨化饲料的特性不同,但在实验室条件下,两者的对虾性能和声饲料活动均相似。两种虾的大小等级在颗粒饲料或膨化饲料之间的最终平均重量,生物量,增重,存活率,食物转化率和食物消耗方面均无显着差异。不同日粮的平均声能没有差异,但是较大的虾在摄食过程中产生较高的能量。尺寸分类和饮食的能量均沿时间间隔(10、20和30分钟)显示出显着的逐步下降。尽管颗粒饲料和膨化饲料的特性不同,但在实验室条件下,两者的对虾性能和声饲料活动均相似。但是较大的虾在摄食过程中产生较高的能量。尺寸分类和饮食的能量均沿时间间隔(10、20和30分钟)显示出显着的逐步下降。尽管颗粒饲料和膨化饲料的特性不同,但在实验室条件下,两者的对虾性能和声饲料活动均相似。但是较大的虾在摄食过程中产生较高的能量。尺寸分类和饮食的能量均沿时间间隔(10、20和30分钟)显示出显着的逐步下降。尽管颗粒饲料和膨化饲料的特性不同,但在实验室条件下,两者的对虾性能和声饲料活动均相似。

更新日期:2021-01-10
down
wechat
bug