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dc.contributor.advisor SAJAR en_ZA Author en_ZA Cram, D.L. Agenbag, J.J. Hampton, I. Robertson, A.A.
dc.coverage.spatial Antarctica en_ZA 2018-08-23T07:58:12Z 2018-08-23T07:58:12Z 1971 en_ZA 1979 1971 en_ZA 1979
dc.description.abstract abstract en_ZA
dc.description.abstract In the late austral summer of 1977/78, a cruise was made to the western South Atlantic in SAS Protea, with the objectives of studying krill with acoustics and remote sensing methods, making measurements of ocean colour with oceanographic and remote sensing methods, and making a small investigation of land and landwater margin features with aerial photography and spectroradiometry. Spectra of krill swarms and ocean colour were obtained. Acoustics data from krill swarms were collected from a 100 kHz side-scan sonar, a 120 kHz calibrated echo-sounder with a digital datalogger, and analogue integrator and analogue magnetic tape reader. It is concluded that remote sensing observations may be useful for some purposes, but are unlikely to be useful as a survey technique. Krill was found to be a good subject for acoustics study. Ocean colour measurements and spectra were obtained at 20 stations in the Southern Ocean, but chlorophyll values were uniformly low. Based on the results of this cruise, a number of recommendations are made to assist the development of acoustics survey methods for krill. en_ZA
dc.description.sponsorship Sponsored by the National Research Foundation (South Africa) en_ZA
dc.description.sponsorship Sponsored by the National Research Foundation (South Africa)
dc.description.statementofresponsibility Antarctic Legacy of South Africa en_ZA
dc.description.statementofresponsibility Antarctic Legacy Project
dc.language en_ZA en_ZA
dc.language en_ZA
dc.publisher South African Journal of Antarctic Research en_ZA
dc.publisher South African Journal of Antarctic Research Vol 9
dc.relation.ispartof Vol 4 en_ZA
dc.rights Copyright en_ZA
dc.rights Copyright
dc.subject Antarctica en_ZA
dc.subject South Atlantic
dc.subject Krill
dc.subject Abundance
dc.subject Acoustics Survey
dc.title Title en_ZA
dc.title SAS Protea Cruise, 1978; The general results of the acoustics and remote sensing study, with recommendations for estimating the abundance of krill ( Euphausia superba Dana).
dc.type Articles en_ZA
dc.type Articles
iso19115.mdconstraints.uselimitation This item and the content of this website are subject to copyright protection. Reproduction of the content, or any part of it, other than for research, academic or non-commercial use is prohibited without prior consent from the copyright holder. en_za PDF en_za
iso19115.mdidentification.deliverypoint Antarctic Legacy of South Africa, Faculty of Science, Stellenbosch University. Private Bag X1, Matieland. Stellenbosch. South Africa. en_za
iso19115.mdidentification.electronicmailaddress en-za

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