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.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
Literature cited
Aron, W., N. Raxter, R. Noel and W. Andrews: A description of a discrete depth plankton sampler with some notes on the towing behaviour of a six foot Isaacs-Kidd mid-water trawl and a one-meter ring net. Limnol. Oceanogr. 9, 324–333 (1964).
Barham, E. G.: The ecology of sonic scattering layers in the Monterey Bay area. 182pp. Ph. D. Thesis, Stanford Univ. 1956
—: The cod-end sampler. Pubbl. Staz. zool. Napoli 30, 1–8 (1957)
—: Siphonophores and the deep scattering layer. Science, N.Y. 140, 826–828 (1963)
Bé, A. W. H.: Quantitative multiple opening-and-closing plankton samplers. Deep Sea Res. 9, 144–151 (1962)
Currie, R. I.: Net closing gear. Rapp. P.-v. Réun. Commn int. Explor. scient. Mer Méditerr. 153, 48–54 (1962).
Foxton, P.: An automatic opening-closing device for large plankton nets and mid-water trawls. J. mar. biol. Ass. U.K. 43, 295–308 (1963).
Harrisson, C. M. H.: On methods for sampling mesopelagic fishes. Symp. zool. Soc. Lond. No. 19, 71–126 (1967).
Isaacs, J. D. and D. M. Brown: Isaacs-Brown opening, closing trawl. In: Oceanographic equipment report. 36 pp. La Jolla, Calif.: Scripps Institution of Oceanography (Ref. No. 66-18) 1966
Kinzer, J.: An opening and closing mechanism for the highspeed plankton sampler HAI. Deep Sea Res. 13, 473–474 (1966).
Peabcy, W. G. and L. Hubbard: A modification of the Isaacs-Kidd mid-water trawl for sampling at different depth intervals. Deep Sea Res. 11, 263–264 (1964).
Pickwell, G. V., E. G. Barham and J. W. Wilton: Carbon monoxide production by a bathypelagic siphonophore. Science, N.Y. 144, 860–862 (1964).
Tucker, G. H.: Relation of fishes and other organisms to the scattering of underwater sound. J. mar. Res. 10, 215–238 (1951).
Yentsch, C. S., G. D. Grice and A. D. Hart: Some opening-closing devices for plankton nets operated by pressure, electrical, and mechanical action. Rapp. P.-v. Réun. Commn int. Explor. scient. Mer. Méditeit. 153, 59–65 (1962).
Author information
Authors and Affiliations
Additional information
Communicated by G. L. Voss, Miami
Rights and permissions
About this article
Cite this article
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
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF00347008