期刊
AQUATIC LIVING RESOURCES
卷 16, 期 3, 页码 293-298出版社
GAUTHIER-VILLARS/EDITIONS ELSEVIER
DOI: 10.1016/S0990-7440(03)00013-5
关键词
behaviour; invertebrate; swimming; speed; target tracking
A scattering layer consisting mainly of krill (Meganyctiphanes norvegica) was studied with a submersible transducer, to assess the behaviour of individual organisms in Situ by means of split-beam target tracking. Individuals were resolved and tracked, but a rapid increase in average swimming speeds with depth suggested that inaccuracies in the angular estimates affected the estimates. Attempts were made to smooth the tracks during post-processing. Smoothed speeds suggested that most (>78%) invertebrates swam at speeds below 12 cm s(-1) (mode similar to4 cm s(-1)), with components of speed larger in the horizontal plane than in the vertical. (C) 2003 Editions scientifiques et medicales Elsevier SAS and Ifremer/IRD/Inra/Cernagref. All rights reserved.
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