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Acoustic sampling volume
(Journal article; Peer reviewed, 1991)
Knowledge of the acoustic sampling volume is necessary in many quantitative applications of acoustics. In general, the sampling volume is not merely a characteristic of the transmitting and receiving transducers, but also ...
Acoustic scattering models of zooplankton
Correcting acoustic measurements of scatterer density for extinction
(Journal article; Peer reviewed, 1990)
Extinction is sometimes a major problem in acoustic surveys of fish stocks, as it often occurs when the fish are concentrated and easiest to survey. The same may be true of certain macrozooplankton, such as krill in swarms. ...
Can predator avoidance explain varying overwintering depth of Calanus in different oceanic water masses?
(Journal article; Peer reviewed, 1999-04-15)
Distributions of overwintering Calanus spp. in the upper 1000 m in the Norwegian and Greenland Seas were studied in relation to hydrography, invertebrate predators and acoustic scattering layers (38 kHz). C, finmarchicus ...
Acoustic abundance estimation of midwater animals
(Journal article; Peer reviewed, 1999)