Stress and aggression have negative effects on fish welfare and productivity in aquaculture. Thus, research to understand aggression and stress in farmed fish is required. The neuropeptides arginine-vasotocin (AVT) and corticotropin-releasing factor (CRF) are involved in the control of stress and aggression. Therefore, we investigated the effect of agonistic interactions on the gene expression of AVT, CRF and their receptors in juvenile rainbow trout (Oncorhynchus mykiss). The social interactions lead to a clear dominant-subordinate relationship with dominant fish feeding more and being more aggressive. Subordinate fish had an upregulation of the AVT receptor (AVT-R), an upregulation of CRF mRNA levels, and higher plasma cortisol levels. The attenuating effect of AVT on aggression in rainbow trout is proposed to be mediated by AVT-R, and the attenuating effect of the CRF system is proposed to be mediated by CRF.

压力和攻击性对水产养殖中的鱼类福利和生产力有负面影响。因此，需要进行研究以了解养殖鱼类的攻击性和压力。神经肽精氨酸-血管收缩素 (AVT) 和促肾上腺皮质激素释放因子 (CRF) 参与控制压力和攻击性。因此，我们研究了激动性相互作用对幼虹鳟鱼（Oncorhynchus mykiss ） AVT、CRF 及其受体基因表达的影响。）。社会互动导致明显的支配-从属关系，占主导地位的鱼摄食更多，更具攻击性。下级鱼的 AVT 受体 (AVT-R) 上调，CRF mRNA 水平上调，血浆皮质醇水平升高。提出AVT对虹鳟攻击性的减弱作用是由AVT-R介导的，而CRF系统的减弱作用被提出是由CRF介导的。