An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa

Simple item page
dc.contributor.advisorGriffiths, Charles Len_ZA
dc.contributor.authorVeldhuis, Helen Anneen_ZA
dc.date.accessioned2016-09-29T17:15:44Z
dc.date.available2016-09-29T17:15:44Z
dc.date.issued1987en_ZA
dc.description.abstractThe Knysna estuary system, on the south coast of South Africa, was sampled for zooplankton over period of one year. All species were recorded and an attempt was made at relating the distribution of populations to physical factors within the estuary. Over 50 species were identified. Pseudodiaptomus hessei, Acartia(Paracartia) longipatella and A.(Acartiella) natalensis were the dominant copepods in the upper estuary. Paracalanus spp. were dominant near the mouth. Zooplankton distribution was found to be related to tidal exchange. The zooplankton displayed a seasonal cycle of abundance, with maximum numbers occuring during summer. P. hessei displayed no pronounced seasonal cycle in abundance. Its abundance was strongly related to freshwater inflow. Seasonal succession was evident between A. natalensis, the summer dominant, and A. longipatella, the winter dominant. The controlling factors for this cyclical dominance were not clear. Diel vertical migration behaviour was shown to various degrees by virtually all zooplankton populations. The stimulus for this behaviour could not be definitely identified.en_ZA
dc.identifier.apacitationVeldhuis, H. A. (1987). <i>An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Biological Sciences. Retrieved from http://hdl.handle.net/11427/22015en_ZA
dc.identifier.chicagocitationVeldhuis, Helen Anne. <i>"An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1987. http://hdl.handle.net/11427/22015en_ZA
dc.identifier.citationVeldhuis, H. 1987. An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Veldhuis, Helen Anne AB - The Knysna estuary system, on the south coast of South Africa, was sampled for zooplankton over period of one year. All species were recorded and an attempt was made at relating the distribution of populations to physical factors within the estuary. Over 50 species were identified. Pseudodiaptomus hessei, Acartia(Paracartia) longipatella and A.(Acartiella) natalensis were the dominant copepods in the upper estuary. Paracalanus spp. were dominant near the mouth. Zooplankton distribution was found to be related to tidal exchange. The zooplankton displayed a seasonal cycle of abundance, with maximum numbers occuring during summer. P. hessei displayed no pronounced seasonal cycle in abundance. Its abundance was strongly related to freshwater inflow. Seasonal succession was evident between A. natalensis, the summer dominant, and A. longipatella, the winter dominant. The controlling factors for this cyclical dominance were not clear. Diel vertical migration behaviour was shown to various degrees by virtually all zooplankton populations. The stimulus for this behaviour could not be definitely identified. DA - 1987 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1987 T1 - An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa TI - An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa UR - http://hdl.handle.net/11427/22015 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/22015
dc.identifier.vancouvercitationVeldhuis HA. An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Biological Sciences, 1987 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/22015en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Biological Sciencesen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherZooplanktonen_ZA
dc.subject.otherEstuarine ecologyen_ZA
dc.subject.otherZoologyen_ZA
dc.titleAn analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africaen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1987_veldhuis_helen_anne.pdf
Size:
1.87 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters