A preliminary assessment of water quality in fish cages on Lake Kariba, Zimbabwe

Mhlanga, W. (1994) A preliminary assessment of water quality in fish cages on Lake Kariba, Zimbabwe. Kariba, Zimbabwe, Department of National Parks and Wild Life Management, 15pp. (Lake Kariba Fisheries Research Institute Project Report, 78)

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (603Kb) | Preview

Abstract

The water quality in fish cages on Lake Kariba was studied. The Kruskal-Wallis test was used to determine whether the water quality parameters differed significantly among the cage-types (cage-type effect). Secchi disc readings ranged from 2 to 4 metres, while temperature ranged from 23 degree C to 29.5 degree C. The observed conductivity was between 98.7 mu S/cm and 102.3 mu S/cm. The pH was between 6.31 and 7.82. Concentrations of dissolved oxygen varied from 1.55 to 6.47 mg/l, while dissolved oxygen saturation ranged from 22.3% to 83.1%. Within the same month, temperature did not differ significantly among cages. Conductivity, pH, dissolved oxygen concentration and dissolved oxygen saturation differed significantly among the 3 cage-types. Temperature and pH levels in the cages were close to the optimum levels for the culture of cichlids. Sub-optimal levels of dissolved oxygen occurred occasionally in the octagonal cages.

Item Type: Monograph or Serial Issue
Title: A preliminary assessment of water quality in fish cages on Lake Kariba, Zimbabwe
Personal Creator/Author:
CreatorsEmail
Mhlanga, W.
Series Name: Lake Kariba Fisheries Research Institute Project Report
Volume: 78
Number of Pages: 15
Date: 1994
Publisher: Department of National Parks and Wild Life Management
Place of Publication: Kariba, Zimbabwe
Issuing Agency: Lake Kariba Fisheries Research Institute, Zimbabwe
Uncontrolled Keywords: Zimbabwe; Lake Kariba; water quality; fish cages; cage culture
Subjects: Aquaculture
Ecology
Management
Item ID: 8178
Depositing User: Ms Maria Kalentsits
Date Deposited: 07 Mar 2012 09:11
Last Modified: 11 Mar 2012 08:56
URI: http://aquaticcommons.org/id/eprint/8178

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...