BIUSTRE

Bioecology of large Branchiopods in Central District, Botswana

Show simple item record

dc.contributor.supervisor Wasserman, Ryan John
dc.contributor.supervisor Nyamukondiwa, Casper
dc.contributor.author Tladi, Murphy
dc.date.accessioned 2022-06-30T08:38:53Z
dc.date.available 2022-06-30T08:38:53Z
dc.date.issued 2020-12-19
dc.identifier.citation Tladi, M. (2020) Bioecology of large Branchiopods in Central District, Botswana, Master's Thesis, Botswana International University of Science and Technology: Palapye. en_US
dc.identifier.uri http://repository.biust.ac.bw/handle/123456789/472
dc.description Thesis(Msc Biological Sciences and Biotechnology)---Botswana International University of Science and Technology, 2020 en_US
dc.description.abstract The bioecology of large branchiopods in Central District, Botswana, was analysed to determine if genetic relatedness or environment of origin determined the thermal physiology of large branchiopods. Two temporary wetland types (Rock-pools and Pans) were identified and their thermal conditions characterised. Temperatures experienced in each wetlands type were measured for synchronised periods spanning both dry phases and hydroperiods of the temporary wetlands. Anostraca and Spinicaudata specialists from each temporary wetland were then identified and their thermal physiology assessed. Physiological thermal fitness of large branchiopods were measured using critical thermal limits and thermal preferences. Finally, the effect of light and temperature on dormant cysts of a dominant large branchiopod were assessed. Streptocephalus cafer dormant cyst hatching success was analysed using variable temperatures and light durations. The thermal properties of rock-pools and pans were grouped according to wetland type, highlighting the thermal differences between these different temporary wetland types. Rock-pools experienced high temperatures compared to pans in general. However, thermal physiologies of large branchiopods differed according to taxonomic orders in thermal limits. Spinicaudatans were tolerant to higher temperatures than anostracans. The results for thermal limits and thermal preference differed across species. The hatching success of S. cafer was optimal at 27 °C in 12hrs:12hrs light:dark regime. In conclusion, the thermal physiologies of large branchiopods appear to primarily determined by genetic relatedness with the environment of origin being secondary. While not part of the thesis itself, the opportunity to describe the complete mitochondrial DNA of the studied 2 species was also taken, to aid in resolving phylogenies for these understudied taxa. These results are presented as supplementary material (See files S1-3). en_US
dc.description.sponsorship Botswana International University of Science and Technology en_US
dc.language.iso en en_US
dc.publisher Botswana International University of Science and Technology (BIUST) en_US
dc.subject Anostraca en_US
dc.subject Brachiopods en_US
dc.subject Rock pools en_US
dc.subject Spinicaudata en_US
dc.subject Streptocephalus en_US
dc.subject Temporary water bodies en_US
dc.title Bioecology of large Branchiopods in Central District, Botswana en_US
dc.description.level msc en_US
dc.description.accessibility unrestricted en_US
dc.description.department bsb en_US


Files in this item

Icon
Name: Tladi_BIUST_2021.pdf
Size: 4.664Mb
Format: PDF
View/Open

This item appears in the following Collection(s)

  • Faculty of Sciences
    This collection is made up of electronic theses and dissertations produced by post graduate students from Faculty of Sciences

Show simple item record

Search BIUSTRE


Browse

My Account