M.Sc. / This study was initiated after a clear need to test and establish a more userfriendly fish species for use in routine laboratory bioassays was identified. This led to a literature review of current toxicity testing species of fish being used, internationally as well as nationally, and identifying which species could possibly be the most suited for use in South African laboratories. From this literature review, it was evident that much emphasis is placed on the practicability of the chosen fish species, and the fact that it can easily be bred within the laboratory, as well as the particular fish specie’s general sensitivity to various toxicants over a wide range of concentrations. The objective of this study is therefore to profile various species of fish to determine which species would be most suited to routine toxicity testing under South African laboratory conditions. This will be done through assimilation of available literature as well as personal communications with people with various expertise and experience in working with the particular fish species. This choice will then be based on the ability of the particular species of fish to ‘balance’ amenability to laboratory conditions with general sensitivity to toxicants. Various indigenous as well as exotic species were therefore selected and tested for suitability for routine testing. Exotic species included Poecilia reticulata and Danio rerio, while the indigenous species tested were Barbus trimaculatus, Barbus argenteus, Tilapia sparrmanii, Oreochromis mossambicus and Pseudocrenilabrus philander philander. Breeding experiments were conducted with all of the abovementioned species and, based on these results; recommendations are made as to which species of fish showed the highest degree of amenability to maintenance within the laboratory.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:uj/uj:12343 |
| Date | 16 October 2008 |
| Creators | Ross, Mathew |
| Source Sets | South African National ETD Portal |
| Detected Language | English |
| Type | Thesis |
Page generated in 0.0018 seconds