Grupo de Investigación en Acuicultura, ICCM-IUSA, Telde, Las Palmas, Canary Islands, Spain.
J Fish Biol. 2009 Mar;74(4):790-805. doi: 10.1111/j.1095-8649.2008.02161.x.
In gilthead sea bream Sparus aurata held in groups of two, five or 10 fish, social hierarchies were observed. Subordinate S. aurata were characterized by elevation of basal levels of plasma cortisol, together with a reduced immunological potential. Subordinate fish also showed lower feed intake, feed utilization and lower growth. Fatty acid composition was also affected by social status, with a lower content of saturated acids, oleic and eicosapentaenoic, in muscle and liver of fish considered as subordinate. Results show that social hierarchy acts as a stressor in S.aurata.
在以两条、五条或十条鱼为一组饲养的金头鲷 Sparus aurata 中，观察到了社会等级制度。从属的金头鲷的特征是基础水平的血浆皮质醇升高，同时免疫能力降低。从属鱼的摄食量、饲料利用率和生长速度也较低。脂肪酸组成也受到社会地位的影响，在被认为是从属的鱼的肌肉和肝脏中，饱和酸、油酸和二十碳五烯酸的含量较低。研究结果表明，社会等级制度在金头鲷中是一种应激源。
