{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/21936"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/21936","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"The influence of thermal polution on various aspects of the biology of three species of crab","abstract":"The construction of a nuclear power station on the west coast of South Africa will result in a large volume of heated effluent being discharged into the ocean, thus raising the temperature of the surrounding sea by a few degrees. The physiological effect that this hot water will have on three species of crab common along the west coast, is presented in this paper. Parameters of the energy equation C = Pg + R + Uₑₓ + F + Uₑ have been measured for adult Plagusia chabrus, Hymenosoma orbiculare and Cyclograpsus punctatus. It appears that rate-temperature responses increase with increase in temperature for all three species. Favourable water temperatures were found to be between 16°C and 21°C for the three species, with temperatures of 26°C being detrimental, especially during moulting in P. chabrus and H. orbiculare. The energy budget and energetic efficiencies are calculated for all the species and it appears that the increased temperatures around Koeberg Power Station will be beneficial to the adult crab species.","abstract_html":"The construction of a nuclear power station on the west coast of South Africa will result in a large volume of heated effluent being discharged into the ocean, thus raising the temperature of the surrounding sea by a few degrees. The physiological effect that this hot water will have on three species of crab common along the west coast, is presented in this paper. Parameters of the energy equation C = Pg + R + Uₑₓ + F + Uₑ have been measured for adult Plagusia chabrus, Hymenosoma orbiculare and Cyclograpsus punctatus. It appears that rate-temperature responses increase with increase in temperature for all three species. Favourable water temperatures were found to be between 16°C and 21°C for the three species, with temperatures of 26°C being detrimental, especially during moulting in P. chabrus and H. orbiculare. The energy budget and energetic efficiencies are calculated for all the species and it appears that the increased temperatures around Koeberg Power Station will be beneficial to the adult crab species.","abstract_has_math":false,"creators":["Beviss-Challinor, Lesley Doreen Margaret"],"institution":"Department of Biological Sciences","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Cook, Peter"],"committee_chairs":[],"committee_members":[],"year":1983,"date_issued":"1983","date_published":"1983","updated_at":"2026-07-22T22:22:43Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/21936","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Cook, Peter"]},{"key":"dc:creator","label":"Author","values":["Beviss-Challinor, Lesley Doreen Margaret"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2016-09-25T16:51:55Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2016-09-25T16:51:55Z"]},{"key":"dc:date.issued","label":"Date","values":["1983"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Biological Sciences"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Master Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Masters"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["MSc"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/21936"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Bibliography: pages 106-117."]},{"key":"dc:description.abstract","label":"Abstract","values":["The construction of a nuclear power station on the west coast of South Africa will result in a large volume of heated effluent being discharged into the ocean, thus raising the temperature of the surrounding sea by a few degrees. The physiological effect that this hot water will have on three species of crab common along the west coast, is presented in this paper. Parameters of the energy equation C = Pg + R + Uₑₓ + F + Uₑ have been measured for adult Plagusia chabrus, Hymenosoma orbiculare and Cyclograpsus punctatus. It appears that rate-temperature responses increase with increase in temperature for all three species. Favourable water temperatures were found to be between 16°C and 21°C for the three species, with temperatures of 26°C being detrimental, especially during moulting in P. chabrus and H. orbiculare. The energy budget and energetic efficiencies are calculated for all the species and it appears that the increased temperatures around Koeberg Power Station will be beneficial to the adult crab species."]},{"key":"dc:title","label":"Title","values":["The influence of thermal polution on various aspects of the biology of three species of crab"]}]}],"canonical_facts":{"dc:contributor.advisor":["Cook, Peter"],"dc:creator":["Beviss-Challinor, Lesley Doreen Margaret"],"dc:date.accessioned":["2016-09-25T16:51:55Z"],"dc:date.available":["2016-09-25T16:51:55Z"],"dc:date.issued":["1983"],"dc:description":["Bibliography: pages 106-117."],"dc:description.abstract":["The construction of a nuclear power station on the west coast of South Africa will result in a large volume of heated effluent being discharged into the ocean, thus raising the temperature of the surrounding sea by a few degrees. The physiological effect that this hot water will have on three species of crab common along the west coast, is presented in this paper. Parameters of the energy equation C = Pg + R + Uₑₓ + F + Uₑ have been measured for adult Plagusia chabrus, Hymenosoma orbiculare and Cyclograpsus punctatus. It appears that rate-temperature responses increase with increase in temperature for all three species. Favourable water temperatures were found to be between 16°C and 21°C for the three species, with temperatures of 26°C being detrimental, especially during moulting in P. chabrus and H. orbiculare. The energy budget and energetic efficiencies are calculated for all the species and it appears that the increased temperatures around Koeberg Power Station will be beneficial to the adult crab species."],"dc:identifier.uri":["http://hdl.handle.net/11427/21936"],"dc:language.iso":["eng"],"dc:publisher.department":["Department of Biological Sciences"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["The influence of thermal polution on various aspects of the biology of three species of crab"],"dc:type":["Master Thesis"],"dc:type.qualificationlevel":["Masters"],"dc:type.qualificationname":["MSc"]},"updated_at":"2026-07-22T22:22:43Z"}