Summary
The effectiveness of the Rectangular Midwater Trawl (RMT) for sampling krill swarms was studied by observing the behaviour of swarms in the vicinity of the net using echosounders. Large scale avoidance was observed by day but not at night. By day krill layers dispersed to such an extent that few krill were present less than 10 m below the net. Limited avoidance by night indicates that the krill are acting on visual clues of the net's presence.
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References
BIOMASS (1985) Report on Post-FIBEX Acoustic Workshop, Frankfurt (FRG), September 1984
BIOMASS (in press) Rep Ser
Boden BP (1969) Observations of bioluminescence on SOND 1965 cruise of RRS Discovery. J Mar Biol Assoc UK 49:669–682
Clarke MR (1969) A new midwater trawl for sampling discrete depth hirizons. J Mar Biol Assoc UK 49:945–960
Kemp S, Hardy AC, Mackintosh NA (1929) Discovery investigations: objects equipment and methods. Discovery Rep 1:141–232
Kils U (1979) Swimming performance and escape capacity of Antarctic Krill Euphausia superba. Meeresforschung 27:264–266
Kils U (1981) The swimming behaviour, swimming performance and energy balance of Antarctic Krill, Euphausia superba. BIOMASS Sci Ser 3, 121 pp
Marr JWS (1962) The natural history and geography of the Antarctic Krill (Euphausia superba Dana). Discovery Rep 32:33–464
Roe HSJ, Baker AC de, Carson RM, Wild R, Shale DM (1980) Behaviour of the Institute of Oceanographic Sciences Rectangular Midwater Trawls: theoretical aspects and experimental observations. Mar Biol 56:247–259
Roe HSJ, Shale DM (1979) A new multiple rectangular midwater trawl (RMT1+8 M) and some modifications to the Institute of Oceanographic Sciences RMT1+8. Mar Biol 50:283–288
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Everson, I., Bone, D.G. Effectiveness of the RMT8 system for sampling krill (Euphausia superba) swarms. Polar Biol 6, 83–90 (1986). https://doi.org/10.1007/BF00258257
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DOI: https://doi.org/10.1007/BF00258257