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dc.contributor.authorYekwayo, Inam
dc.date.accessioned2010-11-26T09:15:20Z
dc.date.available2010-11-26T09:15:20Z
dc.date.created2009en
dc.date.issued2010-11-26T09:15:20Z
dc.identifier.urihttp://hdl.handle.net/123456789/830
dc.descriptionThree files are attacheden
dc.description.abstractThe reproductive biology of giant periwinkle (Turbo sarmaticus) was investigated using gravimetric method. Samples were randomly collected from Dwesa-Cwebe Nature Reserve during spring low tide from June 1996 to July 1997 and preserved in 10% formalin seawater. A 2-way Analysis of Covariance (ANCOVA) test was used to test the effect of gender and month on the Gonado-Somatic Index (GSI) using the operculum diameter as covariate. The results indicated that the male GSI was grater than the female GSI and this was due to the selective predation. The results showed synchronized spawning period of both males and females. Results from Chi-squared tests showed a distortion from a 1:1 sex ratio with significantly more males than females. Males appeared to attain size at sexual maturity earlier than females. Spawning of T. sarmaticus occurred in warmer months and temperature was found to be the important factor triggering spawning. Information obtained from this study may possibly add value on the effective management of this species. Key words: Turbo sarmaticus, reproductive cycle, spawning period, sex ratio, sexual maturity.en
dc.description.statementofresponsibilityNiba, Augustine
dc.format.extent169472 bytes
dc.format.extent26624 bytes
dc.format.extent22528 bytes
dc.format.mimetypeapplication/msword
dc.format.mimetypeapplication/msword
dc.format.mimetypeapplication/msword
dc.languageEnglishen
dc.language.isoen_US
dc.rightscopyrighten
dc.subjectTurbo sarmaticus, reproductive cycle, spawning period, sex ratio, sexual maturityen
dc.titleReproductive biology of Turbo sarmaticus at Dwesa-Cwebe Nature Reserveen
dc.mdidentification.purposeIn partial fulfilment of the award of a BSc Honours Degree in Zoologyen
dc.mdidentification.organizationnameCentre for Invasive Biologyen
dc.mdidentification.deliverypointFaculty of Science, Natural Sciences Building, Private Bag X1, Stellenbosch University, Matielanden
dc.mdidentification.postalcode7602en
dc.mdidentification.phone0218082832en
dc.mdidentification.electronicmailaddresscib@sun.ac.zaen
dc.mddataidentification.languageEnglishen
dc.mdusage.specificusageFresh water biodiversity conservationen
dc.mdusage.userdeterminedlimitationsTerrestrial ecosystemsen
dc.mdusage.usagedatetime2010-05
dc.mdconstraints.uselimitationN/Aen
dc.mdlegalconstraints.accessconstraintscopyrighten
dc.mdlegalconstraints.otherconstraintsN/Aen
dc.lilineage.statementOriginal data is submitted here and not a subseten
dc.dqcompletenessomission.valueunitPercentageen
dc.dqcompletenessomission.valueattributedata95en
dc.mdmaintenanceinformation.maintenanceandupdatefrequencyWhen_neededen
dc.mdmaintenanceinformation.dateofnextupdate2011-09
dc.mdfeaturecataloguedescription.cataloguedate2010-11
dc.mddistributor.distributorcontactWSU/CIBen
dc.mdformat.nameWorden
dc.mdformat.versionN/Aen
dc.exgeographicboundingbox.westboundlongitude28°13'30.04"Een
dc.exgeographicboundingbox.eastboundlongitude28°57'31.20"Een
dc.exgeographicboundingbox.northboundlattitude32°19'10.82"Sen
dc.exgeographicboundingbox.southboundlattitude32°29'27.44"Sen
dc.exverticalextent.minimumvalue27en
dc.exverticalextent.maximumvalue150en
dc.exverticalextent.unitofmeasuremetersen
dc.cibprojectLarge-scale patterns in diversityen


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