Preparing Volume II of my Aquatic Animal Nutrition (Steinberg, 2018), I came across an appealing paper in Aquaculture Research, entitled ‘Effect of feeding stimulants on growth performance, feed intake and appetite regulation of mandarin fish, Siniperca chuatsi’ by Li et al. (2019). I have become acquainted with this hard-to-farm top predatory fish during my stays in Wuhan at the Institute of Hydrobiology of the Chinese Academy of Sciences and at the Huazhong Agricultural University. Furthermore, this paper fits very well into Volume II dealing with Organic Macro- and Micro-Nutrients, since the authors supplemented inosinic acid, l-alanine, yeast extract, squid extract and betaine to artificially feed for the mandarin fish. The authors showed that one supplement significantly and one tended to upregulate the neuropeptide Y (NPY) (fig. 1 in Li et al. (2019)). NPY is a neurotransmitter in the brain and in the autonomic nervous system of animals; one of the strongest orexigenic signals (Ballinger et al., 2001). More interestingly, the authors tested also pro-opiomelanocortin in dependence of feed supplementations and found that all supplementations significantly reduced its expression (fig. 2 in Li et al. (2019)). Pro-opiomelanocortin is a precursor polypeptide in which cleavage gives rise to several peptide hormones. POMC neuron stimulation results in satiety. Therefore, POMC is an anorexigenic, rather than an orectic neuropeptide in mammals and fish (Li et al., 2005; Mineur et al., 2011; Volkoff et al., 2005). However, Li et al. (2019) wrote that POMC has been approved as an orectic neuropeptide in mammals and fish (Volkoff et al., 2005). This contrasts the review about neuropeptides and the control of food intake in fish by Volkoff et al. (2005) who classified POMC as anorexigenic factor and summarized it in fig. 1. This classification complies well with further studies in mammals (Krude et al., 2003; Li et al., 2005; Mineur et al., 2011; Mostafa et al., 2020; Williams & Schwartz, 2005). This indicates that more dietary supplements identified by Li et al. (2019) appear to have the potential to function as feed attractant and dietary supplement for S. chuatsi.

准备的我卷二水产 动物 营养（斯坦伯格，2018），我偶然在水产养殖研究一个有吸引力的文件，标题为“影响摄食生长性能，采食量和鳜鱼的食欲调节兴奋剂来到翘 嘴鳜”由李等人. （2019 年）。在武汉中科院水生所和华中农业大学期间，我认识了这种难以养殖的顶级掠食性鱼类。此外，本文非常适合进入第二卷交易与有机 宏观-和 微-营养素，因为作者补充了肌苷酸、l-丙氨酸、酵母提取物、鱿鱼提取物和甜菜碱，人工喂养鳜鱼。作者表明，一种补充剂显着上调，另一种倾向于上调神经肽 Y (NPY)（Li 等人（2019 年）中的图 1 ）。NPY 是大脑和动物自主神经系统中的一种神经递质；最强的食欲信号之一（Ballinger 等人，2001 年）。更有趣的是，作者还测试了依赖于饲料补充剂的阿片黑素前体，发现所有补充剂都显着降低了其表达（Li 等人的图 2（2019 年）))。阿片黑素皮质素原是一种前体多肽，其中的裂解产生几种肽激素。POMC 神经元刺激导致饱腹感。因此，POMC 是一种厌食性神经肽，而不是哺乳动物和鱼类的食欲神经肽（Li et al., 2005 ; Mineur et al., 2011 ; Volkoff et al., 2005）。然而，李等人。( 2019 ) 写道，POMC 已被批准作为哺乳动物和鱼类的食欲神经肽 (Volkoff et al., 2005 )。这与 Volkoff 等人关于神经肽和鱼类食物摄入控制的评论形成对比。( 2005)谁将POMC归类为厌食因子并将其总结在图1中。1. 该分类符合哺乳动物的进一步研究（Krude et al., 2003 ; Li et al., 2005 ; Mineur et al., 2011 ; Mostafa et al., 2020 ; Williams & Schwartz, 2005）。这表明 Li 等人确定的更多膳食补充剂。( 2019 ) 似乎有潜力作为S. chuatsi 的饲料引诱剂和膳食补充剂。