Zooplankton sound scattering layers in north Norwegian fjords: Specifications and functioning of the acoustical, data- and net-sampling systems
- 20 October 1982
- journal article
- Published by Taylor & Francis in Sarsia
- Vol. 67 (3) , 187-199
- https://doi.org/10.1080/00364827.1982.10420546
Abstract
The specifications and functioning of the acoustic, data and environmental monitoring systems used in the ‘Zooplankton Sound Scattering Layers Project’ of the University of Tromsö are described. The instrumentation onboard RV ‘Johan Ruud’ for studying sound scattering layers includes 38 and 120 kHz echosounders, a digital echointegrator, a computer (for data storage, retrieval, and analyses — including echointegration, and conductivity, temperature, oxygen, and depth-sonde analyses), fluorometer, irradiance meters, pelagic and prawn trawls, a Longhurst-Hardy Plankton Recorder, and a Tucker trawl. Various advantages and limitations as well as possible future development of the systems are discussed with respect to zoo-plankton-orientated research on sound scattering layers.Keywords
This publication has 8 references indexed in Scilit:
- Distribution and standing stock of zooplankton sound-scattering layers along the north Norwegian coast in February—March, 1978Sarsia, 1981
- Acoustical estimation of zooplankton populations1Limnology and Oceanography, 1979
- A preliminary study of zooplankton sound scattering layers in Balsfjorden: Structure, energetics, and migrationsSarsia, 1978
- Ecological studies on the deep-water pelagic community of Korsfjorden, western NorwaySarsia, 1977
- Reverberation from plankton at 330 kHz in the Western PacificThe Journal of the Acoustical Society of America, 1975
- Sampling bias of a Longhurst‐Hardy plankton recorder1Limnology and Oceanography, 1973
- Shallow Scattering Layer in the Subarctic Pacific Ocean: Detection by High-Frequency Echo SounderScience, 1969
- Progress report on scattering layer observations in the Atlantic OceanEOS, Transactions American Geophysical Union, 1948