dc.contributor.advisor |
SAJAR |
en_ZA |
dc.contributor.author |
Author |
en_ZA |
dc.contributor.author |
Cram, D.L. |
|
dc.contributor.author |
Agenbag, J.J. |
|
dc.contributor.author |
Hampton, I. |
|
dc.contributor.author |
Robertson, A.A. |
|
dc.coverage.spatial |
Antarctica |
en_ZA |
dc.date.accessioned |
2018-08-23T07:58:12Z |
|
dc.date.available |
2018-08-23T07:58:12Z |
|
dc.date.created |
1971 |
en_ZA |
dc.date.created |
1979 |
|
dc.date.issued |
1971 |
en_ZA |
dc.date.issued |
1979 |
|
dc.identifier.uri |
http://hdl.handle.net/123456789/7594 |
|
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 |
iso19115.mdformat.name |
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 |
antarcticlegacy@sun.ac.za |
en-za |