尼罗罗非鱼(Oreochromis niloticus Linn)胃酸的PH值,周日变化及其在消化兰藻中的作用PH Values, Diurnal Cycle of Gastric Acid and Its Role in Digestion of Blue-green Alga, Microcystis flos-aquae in Nile Tilapia, Oreochromis niloticus (Linn)
吉滨河,周路,曾纪财
摘要(Abstract)：
通过测定喂食水华微囊藻的尼罗罗非鱼胃PH值、不同颜色粪便的叶綠素/脱镁叶綠素比例,发现尼罗罗非鱼具有一个与摄食相关的胃酸分泌周期。摄食旺期胃平均PH值为1.47,最低值为0.8。停食后PH值升高,最大值为6.0。用不同浓度的盐酸处理水华微囊藻和对不同颜色粪便的营养分析结果表明,高浓度的胃酸(PH<2)溶解了水华微囊藻细胞壁,为肠消化酶对细胞内含物进行消化创造了先决条件。
关键词(KeyWords)： 胃PH值;叶綠素/脱镁叶綠素比例水华微囊藻;细胞壁;綠色粪便;棕色粪便
基金项目(Foundation):
作者(Author): 吉滨河,周路,曾纪财
参考文献(References)：
- 1、 (日)矢田敏晃。用浮游植物饲育尼罗罗非鱼的试验。鲁守范泽自《水产养殖》1988(81) ,7～14。
- 2、 Barrington, E. J. W. 1975． The alimentary canal and digestion. Inthe physiology of fishes I: 109-161． Brown. M. E. (Ed.). New. York:Academic press.
- 3、 Bowen, S. H. 1976 b. Mechanism for digestion of detrial bacteria bythe cichlid fish Sarotherodon mossambicus(Peters) Nature (London)26O:138．
- 4、 Bowen, S. H. 1982 Feeding, digestion and growth-qualitative consider-ations. p. I4i-I56． In R. S. V pullin and R. H. LoweMcConnell (eds.)The biology and culture of tilapias. ICLARM Conference Proceedings7,432p. International Center for Living Aquatic Resourcs Management,Manila, Philippines
- 5、 Eohlin, p. & Morris I. I965． The relationship between bluegreenalgae and bacteria. Biol. Rev. 40: I43-187．
- 6、 Fish, G. R. I952． Digestion in Tilapia esculenta. Nature, Lond167: 900-901．
- 7、 Fish, G. R. 1960． The comparative activity of digestive emzymes inthe alimentary canal of Tilapia and perch. Hydrobiologia. 15:16I-178．
- 8、 Golterman, H. L., Clymo, R. s. et. a1． 1978． Methods for phy & Chemical Analysis of Fresh Waters. IBP Handbook No 8． BlackwellScientificpu blications. Oxford London Edinburgh Melbourne Secondedition. pp. 2I3．
- 9、 Greenwood, P. H. 1953． Feeding mechanism of the cichlid fish Tilpaia esculenta Graham. Nature, Lond. I72: 207~208．
- 10、 Moriarty, C M. and D. J. W Moriarty. 1973 a. The assimilation ofcarbon from Phytoplankton by the two herbivorous fishes: Tilapianilotica and Haplochromis nigripinnis. J. Zool.I7I:4I-56．
- 11、 Moriarty, D. I. W. 1973． The Physiology of digestion of bluegreenalgae in the cichlid fish Tilapia nilotica. J. Zool.171:1540．
- 12、 Nagase,G.1964． Contribution to physiology of digestion in Tilapiamossambica Peters: Digestive enzymes and effects of diets on theiractivity Z. Vergl. physiol. 49: 270-284．
- 13、 Payne,A. I.1978． Gut PH and digestive strategies in estuarine grey mullet (Mugilidae) and tilapia (Cichlidae). J. Fish Biol I3(5) :627-629．