Hofer R, Schiemer F
Institut für Zoophysiologie, Universität Innsbruck, Universität, Wien, Austria.
Institut für Zoologie, Abteilung für Limnologie, Universität, Wien, Austria.
Oecologia. 1981 Mar;48(3):342-345. doi: 10.1007/BF00346492.
Proteolytic activity in the gut contents of two cichlids and six cyprinids from an artificial basin in Sri Lanka was measured using a simple film strip method. This comparative study contributes to our general knowledge of digestion in herbivorous fish: 1) Specific proteolytic activity (per ml of gut content) is lower in herbivorous than in omnivorous and carnivorous species. 2) Specific proteolytic activity is negatively correlated with the relative length of the gut, but the time of exposure of ingested food to proteolytic enzymes rises with increasing gut length. This results in more intensive proteolytic digestion in herbivorous fish. 3) Proteolytic enzymes seem to be "reabsorbed" in the hindgut of the fish. The effectiveness of this mechanism rises up to a relative gut length of 2.5-3.0. However, the small species Amblypharyngodon melletinus does not fit this relationship.
采用一种简单的薄膜条法，对来自斯里兰卡一个人工池塘的两种丽鱼科鱼类和六种鲤科鱼类肠道内容物中的蛋白水解活性进行了测定。这项比较研究有助于我们了解草食性鱼类消化的一般知识：1）草食性鱼类每毫升肠道内容物的比蛋白水解活性低于杂食性和肉食性鱼类。2）比蛋白水解活性与肠道相对长度呈负相关，但摄入食物暴露于蛋白水解酶的时间随肠道长度增加而延长。这导致草食性鱼类的蛋白水解消化更强烈。3）蛋白水解酶似乎在鱼的后肠被“重吸收”。这种机制的有效性在相对肠道长度达到2.5 - 3.0时会提高。然而，小型物种梅氏钝齿鱼并不符合这种关系。
