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The Tucker opening-closing micronekton net and its performance in a study of the deep scattering layer

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Abstract

An opening-closing, single-sample net system designed to capture micronektonic organisms is described. The net is opened and closed at the mouth by mechanical time-release devices, and can be hauled from small ships on hydrographic wire. Data are presented from a series of 4 hauls made with this system during a study of sonic scattering layers. The population maxima of euphausiids, sergestid prawns and physonect siphonophores corresponded to the level of the main scattering layer. Fishes were concentrated below the layer, and amphipods above it.

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Author notes

  1. I. E. Davies

    Present address: Marine Environment Division, Naval Undersea Warfare Center, San Diego, California, USA

Authors and Affiliations

  1. Marine Environment Division, Naval Undersea Warfare Center, San Diego, California, USA

    E. G. Barham

Authors
  1. I. E. Davies
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  2. E. G. Barham
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Communicated by G. L. Voss, Miami

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Davies, I.E., Barham, E.G. The Tucker opening-closing micronekton net and its performance in a study of the deep scattering layer. Marine Biol. 2, 127–131 (1969). https://doi.org/10.1007/BF00347008

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  • DOI: https://doi.org/10.1007/BF00347008

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