Die effek van temperatuur en vog op die lewensloop en eierontwikkeling van Gryllus Bimaculatus (De Geer) (Gryllidae)

dc.contributor.advisorDe Villiers, W.M.
dc.contributor.postgraduateErasmus, Salome Wilma
dc.date.accessioned2022-05-17T11:22:16Z
dc.date.available2022-05-17T11:22:16Z
dc.date.created2021/11/02
dc.date.issued1980
dc.descriptionDissertation (MSc (Entomology))--University of Pretoria, 1980.
dc.description.abstractA study of the life-cycle of G; bimaculatus, reared under laboratory conditions, on a fixed protein diet was undertaken. The functional relationship between temperature and development was determined and it was found that the relationship deduced for conditions of constant temperatures could successfully be applied to fluctuating temperatures. The development of the embryo was studied and illustrated, as well as the absorption of water in relation to temperature. It was found that the initial absorption of water is temperature dependent and that water absorption begins sooner at high than at lower temperatures. However, after water absorption has commenced uptake is independent of temperature. In spite of similarities between the cricket eggs and certain locust (e.g. Acanthacris) eggs, no drought-induced quiescence could be found in the former. Furthermore, it was found that free water is not necessary for development and eclosion of G. bimaculatus eggs.
dc.description.availabilityUnrestricted
dc.description.degreeMSc (Entomology)
dc.description.departmentZoology and Entomology
dc.identifier.citation*
dc.identifier.urihttps://repository.up.ac.za/handle/2263/85525
dc.language.isoafr
dc.publisherUniversity of Pretoria
dc.rights© 2020 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.
dc.subjectUCTD
dc.subjectTemperatuur
dc.subjectvog
dc.subjectlewensloop
dc.subjecteierontwikkeling
dc.subjectGryllus Bimaculatus
dc.titleDie effek van temperatuur en vog op die lewensloop en eierontwikkeling van Gryllus Bimaculatus (De Geer) (Gryllidae)
dc.typeDissertation

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