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Relationship between the water levels and the fish catches in lakes Mweru and Mweru wa Ntipa, Zambia

机译:赞比亚Mweru和Mweru wa Ntipa湖中水位与鱼获量之间的关系

摘要

The relationships between water level and catch per effort in two Zambian lakes are compared. In the relatively stable Lake Mweru, a positive correlation exists which can be used, with certain reservations, to predict the stateudof the fishery two years in advance. The cause of the relationship is probably the effect of water level on the marshy and swampy breeding areas, where at least the most common species in the commercial catch (Tilapia macruchir) has definite limits for the depth of water in which itudwill breed. For Mweru wa Ntipa, a consistant definite relationship does not exist, probably because the water level and extent of the lake fluctuate widely.
机译:比较了两个赞比亚湖泊的水位和每捕捞量之间的关系。在相对稳定的Mweru湖中,存在一定的正相关性,可以有一定保留地用于提前两年预测渔业状况。造成这种关系的原因可能是水位对湿地和沼泽繁殖区的影响,在该地区至少商业捕捞中最常见的物种(罗非鱼)对繁殖的水深有一定的限制。对于Mweru wa Ntipa而言,不存在一致的确定关系,这可能是因为湖的水位和范围波动很大。

著录项

  • 作者

    Williams R.;

  • 作者单位
  • 年度 1972
  • 总页数
  • 原文格式 PDF
  • 正文语种 en
  • 中图分类

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