Hyldgaard-Jensen J, Cmiljanić R, Wegger I, Andrić R
Acta Vet Scand. 1976;17(2):113-30. doi: 10.1186/BF03547921.
Contrary to blood serotonin the level of free and total tryptophan is distinctly influenced by feed intensity and composition. Piglets show a considerably higher plasma free tryptophan and blood serotonin content than adult pigs, just as boars possess a significantly higher blood level of tryptophan and serotonin than sows. A pronounced individual variation of blood serotonin and a much less variable content among littermate pigs provide evidence that blood serotonin is genetically controlled. Tryptophan is readily absorbed and distributed in a characteristic manner among investigated organs and tissues. A genetical control of blood serotonin and its possible relation with type of reaction exhibited by ergometer exercised pigs support the influence of tryptophan and serotonin on the ability of pigs to withstand controlled environmental conditions such as physical exercise.
与血液中血清素相反，游离色氨酸和总色氨酸的水平明显受采食量和饲料组成的影响。仔猪的血浆游离色氨酸和血液血清素含量比成年猪高得多，同样，公猪的血液色氨酸和血清素水平也明显高于母猪。血液血清素存在明显的个体差异，而同窝仔猪之间的含量变化较小，这证明血液血清素受基因控制。色氨酸易于吸收，并以特定方式分布于被研究的器官和组织中。血液血清素的基因控制及其与测力计运动猪所表现出的反应类型之间的可能关系，支持了色氨酸和血清素对猪耐受诸如体育锻炼等可控环境条件能力的影响。
