%0 Journal Article
%T A new record of Craspedacusta sowerbii (Cnidaria: Limnomedusae) from southern Africa
%A Nancy A. Rayner
%A C.C. Appleton
%J African Zoology
%D 2012
%I 
%X ENGLISH ABSTRACT: The northern hemisphere Craspedacusta sowerbii has been recorded recently from temperate regions of South Africa. Its introduction to southern Africa is thought to have occurred in the 1940s, when a number of exotic species were introduced, associated with man's interference in river catchments. A new record from Theewaterskloof Dam, Cape Province, suggests that its spread is being facilitated by inter-basin translocation of the polyp stage. Histological analysis of the gonads of medusae from Theewaterskloof impoundment showed that they were all females, supporting the hypothesis that only one sex of medusa is budded from anyone polyp colony. ********** AFRIKAANSE OPSOMMING: Die noordelike halfrond Craspedacusta sowerbii is onlangs in gematigde streke van Suid-Afrika aangemeld. Hulle invoering in suidelike Afrika hat moontlik in die 1940s plaasgevind, waartydens 'n aantal uitheemse spesies, as gevolg van die mens se inmenging in rivier-opvanggebiede, ingebring is. Nuwe inligting vanaf die Theewaterskloof Dam, Kaapprovinsie, dui aan dat hul verspreiding deur die hervestiging van die poliepstadium tussen stroomgebiede vergemaklik word. Histologiese ontleding van die gonades van medusas vanuit die Theewaterskloof opvanggebied het getoon dat almal wyfies was, wat die hipotese ondersteun dat slegs medusas van een geslag van enige enkele poliepkolonie afknop.
%K A new record of Craspedacusta sowerbii
%K orthern hemisphere Craspedacusta sowerbii
%K man's interference in river catchments
%K Theewaterskloof Dam
%K Cape Province
%U http://africanzoology.journals.ac.za/pub/article/view/652