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Assessing feed attractability in Pacific white shrimp (Litopenaeus vannamei) using an automated tracking software
Aquaculture ( IF 3.9 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.aquaculture.2020.735692
Guillermo Bardera , Matthew A.G. Owen , Felipe N. Façanha , Jose M. Alcaraz-Calero , Katherine A. Sloman , Mhairi E. Alexander

Abstract In shrimp farming, there has been a considerable focus on the development of novel additives that might reduce costs associated with the time taken by shrimp to locate and ingest feed. However, within these trials there has been little consideration of the role that feeding behaviour of individuals can play in assessing the attractability of additives. As such, the use of tracking technologies in the development of automated protocols is beginning to gain attention as an important tool for monitoring associated behaviours. Therefore the objective of the present study was to validate an automated tracking software (EthoVision) for assessing feed attractability in Pacific white shrimp (Litopenaeus vannamei). Twenty-seven juvenile shrimp (5.54 ± 1.37 g) were used to test three experimental diets with different theoretical levels of attraction; negative (0.07 M quinine-HCl), control, and positive diet (3% attractant). Shrimp were individually video recorded in test arenas for 20 min with each one of the diets. Recordings were also carried out at two times of day (morning and afternoon) to evaluate the effect of time of day on shrimp feeding behaviour. The behaviour of each individual was recorded three times per diet to determine levels of individual variation. Comparison between manual and automated observations validated the reliability of EthoVision in analysing L. vannamei feeding behaviour and the software detected clear differences in feeding behaviour according to diet. Shrimp provided with the positive diet (i.e. 3% attractant) arrived faster and spent longer on the feeding area. In contrast, with the negative diet (i.e. 0.07 M quinine-HCl), shrimp spent more time moving around the test arena and less time interacting with the feed. Time of day also had an effect on several behaviours, but not on the time spent on the feeding tray. Less individual variation in feeding behaviours was found when shrimp were fed the positive diet, suggesting attractive diets can decrease variability in feeding behaviour with potential applications to commercial ponds. Distribution heatmaps provided by EthoVision offered a quick and reliable assessment of feed attractability. The results of this study highlight the use of tracking technologies to assess feed attractability in L. vannamei and the feasibility of automated protocols for the industry.

中文翻译:

使用自动跟踪软件评估南美白对虾(Litopenaeus vannamei)的饲料吸引力

摘要 在对虾养殖中,人们一直非常关注新型添加剂的开发,这些添加剂可能会降低与虾定位和摄取饲料所需的时间相关的成本。然而,在这些试验中,很少考虑个体的进食行为在评估添加剂的吸引力方面可能发挥的作用。因此,在自动化协议的开发中使用跟踪技术作为监控相关行为的重要工具开始受到关注。因此,本研究的目的是验证用于评估南美白对虾(Litopenaeus vannamei)饲料吸引力的自动跟踪软件(EthoVision)。二十七只幼虾(5.54±1。37 g) 用于测试具有不同理论吸引力水平的三种实验饮食;阴性(0.07 M 奎宁-HCl)、对照和阳性饮食(3% 引诱剂)。对每一种饮食,在测试场中对虾单独录制视频 20 分钟。还在一天的两个时间(上午和下午)进行记录以评估一天中的时间对虾喂食行为的影响。每种饮食记录每个个体的行为 3 次,以确定个体差异的水平。手动观察和自动观察之间的比较验证了 EthoVision 在分析南美白对虾摄食行为方面的可靠性,软件检测到不同饮食的摄食行为存在明显差异。提供阳性饲料(即 3% 引诱剂)的虾到达喂食区的速度更快,停留时间更长。相比之下,在阴性饮食(即 0.07 M 盐酸奎宁)的情况下,虾花更多的时间在试验场周围移动,而与饲料相互作用的时间更少。一天中的时间也会对几种行为产生影响,但不会影响在喂食盘上花费的时间。当虾饲喂阳性日粮时,发现个体的摄食行为差异较小,这表明有吸引力的饮食可以减少摄食行为的变异性,并有可能应用于商业池塘。EthoVision 提供的分布热图提供了对饲料吸引力的快速可靠评估。这项研究的结果强调了使用跟踪技术来评估南美白对虾的饲料吸引力以及该行业自动化协议的可行性。虾花更多的时间在试验台上走动,而与饲料互动的时间更少。一天中的时间也会对几种行为产生影响,但不会影响在喂食盘上花费的时间。当虾饲喂阳性日粮时,发现个体的摄食行为差异较小,这表明有吸引力的饮食可以减少摄食行为的变异性,并有可能应用于商业池塘。EthoVision 提供的分布热图提供了对饲料吸引力的快速可靠评估。这项研究的结果强调了使用跟踪技术来评估南美白对虾的饲料吸引力以及该行业自动化协议的可行性。虾花更多的时间在测试场地上移动,而与饲料互动的时间更少。一天中的时间也会对几种行为产生影响,但不会影响在喂食盘上花费的时间。当虾饲喂阳性日粮时,发现个体的摄食行为差异较小,这表明有吸引力的饮食可以减少摄食行为的变异性,并有可能应用于商业池塘。EthoVision 提供的分布热图提供了对饲料吸引力的快速可靠评估。这项研究的结果强调了使用跟踪技术来评估南美白对虾的饲料吸引力以及该行业自动化协议的可行性。当虾饲喂阳性日粮时,发现个体的摄食行为差异较小,这表明有吸引力的饮食可以减少摄食行为的变异性,并有可能应用于商业池塘。EthoVision 提供的分布热图提供了对饲料吸引力的快速可靠评估。这项研究的结果强调了使用跟踪技术来评估南美白对虾的饲料吸引力以及该行业自动化协议的可行性。当虾饲喂阳性日粮时,发现个体的摄食行为差异较小,这表明有吸引力的饮食可以减少摄食行为的变异性,并有可能应用于商业池塘。EthoVision 提供的分布热图提供了对饲料吸引力的快速可靠评估。这项研究的结果强调了使用跟踪技术来评估南美白对虾的饲料吸引力以及该行业自动化协议的可行性。
更新日期:2020-12-01
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