PDF(Pubmed)
Abstract：
Classical assessments of new fish feeds are anthropocentric, focusing mainly on growth. Although this methodology is accurate, it does not consider the fish\' perspective. This study aimed to investigate the behavioural responses and feed preferences of Nile tilapia (Oreochromis niloticus) and gilthead seabream (Sparus aurata) through a self-selection trial using self-feeders. Both species were offered three feeds: a control (PD) commercial-like feed and two diets (ORG1 and ORG2) formulated with different inclusions of alternative ingredients to address some of the current environmental concerns and/or ethical issues often associated with commercial formulations. Three groups of tilapia with an average weight of 163.0 g ± 4.3 g (mean ± SD) and four groups of seabreams with 174.7 g ± 27.0 g were tested. Tilapia exhibited a preference for ORG2 (46.5%), influenced by the sensory properties of the feed and post-ingestion signals. Seabream did not show a preference for any feed. These findings highlight the effectiveness of self-selection experiments in allowing fish to express their feeding behaviour and preferences. Therefore, this approach should be considered in the initial screening and design of new aquaculture feeds and ingredients.
摘要：
对新鱼饲料的经典评估是以人类为中心的，主要关注增长。虽然这种方法是准确的，它不考虑鱼的观点。这项研究旨在通过使用自我饲养者进行的自我选择试验，调查尼罗罗非鱼（Oreochromisniloticus）和金头seabream（Sparusaurata）的行为反应和饲料偏好。这两个物种都提供了三种饲料：对照（PD）商业样饲料和两种饮食（ORG1和ORG2），这些饮食与替代成分的不同内含物一起配制，以解决当前的一些环境问题和/或通常与商业配方相关的伦理问题。测试了三组平均重量为163.0g±4.3g（平均值±SD）的罗非鱼和四组174.7g±27.0g的海流。罗非鱼对ORG2表现出偏好(46.5%)，受饲料感官特性和摄入后信号的影响。Seabream没有显示出对任何饲料的偏好。这些发现强调了自我选择实验在允许鱼类表达其摄食行为和偏好方面的有效性。因此,在新的水产养殖饲料和配料的初步筛选和设计中，应该考虑这种方法。
