首页    期刊浏览 2024年12月05日 星期四
登录注册

文章基本信息

  • 标题:Some aspects of snail ecology in South Africa: A preliminary report*
  • 作者:B. de Meillon ; G. H. Frank ; B. R. Allanson
  • 期刊名称:Bulletin of the World Health Organization
  • 印刷版ISSN:0042-9686
  • 出版年度:1958
  • 卷号:18
  • 期号:5-6
  • 页码:771-783
  • 语种:English
  • 出版社:World Health Organisation
  • 摘要:In this paper, the authors present the preliminary results of a recent ecological survey of some rivers in the Transvaal, Union of South Africa. Representative samples of the molluscan fauna of the rivers were collected and chemical analyses of the river waters were carried out. In addition, such characteristics as current speed, temperature, turbidity, biochemical oxygen demand, and amount of oxygen absorbed from potassium permanganate were determined. No evidence was obtained to show that the chemical composition of natural, unpolluted waters plays any part in determining vector snail habitats. Current speed was found to have some effect, bilharzia vector snails not being found in fast-flowing waters. Of the other factors, turbidity was shown to be of some importance, probably because it affects the growth of the algae on which certain snails seem to depend for their proper development, and severe pollution with sewage and industrial wastes also appeared to have an adverse affect on the snail population. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (1.2M), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 771 772 773 774 775 776 777 778 779 780 781 782 783
Loading...
联系我们|关于我们|网站声明
国家哲学社会科学文献中心版权所有