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

 

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dc.contributor.advisor Griffiths, Charles L en_ZA
dc.contributor.author Veldhuis, Helen Anne en_ZA
dc.date.accessioned 2016-09-29T17:15:44Z
dc.date.available 2016-09-29T17:15:44Z
dc.date.issued 1987 en_ZA
dc.identifier.citation Veldhuis, 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.uri http://hdl.handle.net/11427/22015
dc.description.abstract 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. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Zooplankton en_ZA
dc.subject.other Estuarine ecology en_ZA
dc.subject.other Zoology en_ZA
dc.title An analysis of factors controlling the distribution of zooplankton in the Knysna estuary, South Africa en_ZA
dc.type Thesis / Dissertation en_ZA
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Science en_ZA
dc.publisher.department Department of Biological Sciences en_ZA
dc.type.qualificationlevel Masters en_ZA
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image


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