| 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 |
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| 引用本文： | 吉滨河,周路,曾纪财.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[J].广东海洋大学学报,1989(Z1). |
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| 作者姓名： | 吉滨河 周路 曾纪财 |
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| 作者单位： | 湛江水产学院养殖系，湛江水产学院养殖系，湛江水产学院养殖系 贵州省水产研究所，广东省珠海市拱北动植物检疫所 |
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| 摘 要： | 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。
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| 关 键 词： | 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 |
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) |
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| Gu Binhe Zhou Lu and Zheng Jicai,Zhangjing Fisheries College.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)[J].Journal of Zhanjiang Ocean University,1989(Z1). |
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| Authors: | Gu Binhe Zhou Lu and Zheng Jicai Zhangjing Fisheries College |
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| Abstract: | A diurnal cycle of gastric acid in Oreochromis niloticus (Linn.) fed with blue-green alga, Microcystis flos-aquae has been found by determina- tions of stomuch pH values, proportions of chlorophyll to phyaeophytin in faeces with different colours. The pH of the gastric acid may be as low as 0.8 during peak feeding period with an average 1.47 and as high as 6.0 when feeding stops. Results obtained from treatment of Microcystis in various concentrations of hydrochloric acid (HCL)solutions and nut- ritions analysis of the faeces indicate that the cell walls of the blus-green alga are lysed by high concentrations of gastric acld(pH2), permitring subsequent access to the cell contents by intestinal enzymes |
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| Keywords: | Gastric acid Proportions of chlorophyII/phyaeophytin Microcystis flns-aquae Cell wall Green faeces Brown faeces |
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