Comparative Evaluation of the Effectiveness of some local Fabrics for Zooplankton Harvest
A comparative evaluation of the effectiveness for zooplankton harvest for three local fabrics (a white poplin, 120mm; grey baft, 200mm; a nylon, 235mm) and an imported standard zooplankton net of mesh size 76mm were tested in this study. Mesh sizes and gauze constitution of the fabrics were determin...
| Main Authors: | , , , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
| Published: |
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
2003
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| Subjects: | |
| Online Access: | http://hdl.handle.net/1807/1414 http://bioline.utsc.utoronto.ca/archive/00000552/01/ja03009.pdf |
| Summary: | A comparative evaluation of the effectiveness for zooplankton harvest for three local fabrics (a white poplin, 120mm; grey baft, 200mm; a nylon, 235mm) and an imported standard zooplankton net of mesh size 76mm were tested in this study. Mesh sizes and gauze constitution of the fabrics were determined with an ocular micrometer under a compound microscope. Filtration efficiency and clogging rates of the fabrics were also measured. All fabrics were effective in harvesting species of the copepods, the cladocerans and the large-sized rotifer, Asplanchna. The grey baft and the nylon net were not effective in harvesting the small-sized rotifer species like Keratella, Filinia and Trichocerca. All the fabrics effectively harvested Moina, an excellent freshwater cladoceran for fish larval-rearing. Clogging rate was found to be a function of gauze constitution, while filtration efficiency was an index of both gauze constitution and mesh size of fabrics. @ JASEM |
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