caa a22 4500 397551509 CHVBK 20180308164751.0 cr unu---uuuuu 161202e199604 xx s 000 0 eng 10.1006/jmsc.1996.0038 doi (NATIONALLICENCE)oxford-10.1006/jmsc.1996.0038 Lateral target strength of Antarctic krill [Elektronische Daten] [Roger P. Hewitt, David A. Demer] An area of high krill (Euphausia superba Dana) density was continuously monitored with down-looking and side-looking sonars over a period of 24 h. Measurements of volume backscattering strength were used to describe the density of krill with depth and the vertical movement of krill over time. In situ measurements were made of dorsal aspect target strength (TS) and, as krill moved into the near-surface layer (0-15 m), in situ measurements were made of lateral-aspect TS. The probability density function (PDF) of TS measurements made with the down-looking transducer had a mode at approximately −73 dB. The PDF of TS measurements made with the side-looking transducer was broader with a mode at approximately −67 dB. Sampled krill had a bi-modal length distribution with a major mode at 44 mm and a minor mode at approximately 30 mm. © 1996 International Council for the Exploration of the Sea Regular Articles nationallicence acoustic target strength nationallicence Antarctic krill nationallicence Euphausia superba nationallicence Hewitt Roger P. Southwest Fisheries Science Center, PO Box 271, La Jolla, California 92038, USA aut Demer David A. Southwest Fisheries Science Center, PO Box 271, La Jolla, California 92038, USA aut ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 297-302 1054-3139 53:2<297 1996 53 icesjms https://doi.org/10.1006/jmsc.1996.0038 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1006/jmsc.1996.0038 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hewitt Roger P. Southwest Fisheries Science Center, PO Box 271, La Jolla, California 92038, USA aut NATIONALLICENCE 700 1- Demer David A. Southwest Fisheries Science Center, PO Box 271, La Jolla, California 92038, USA aut NATIONALLICENCE 773 0- ICES Journal of Marine Science Oxford University Press 53/2(1996-04), 297-302 1054-3139 53:2<297 1996 53 icesjms Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford