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53:) species. The dredge is pulled by a boat and operates at any depth on a cable or line, generally with a hydraulic winch. The dredge digs into the ocean floor and bring the animals to the surface where they are caught in a net that either follows behind or is a part of the digging apparatus.
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in 1839 a committee was appointed for dredging research with a view to the investigation of the marine zoology of Great
Britain, the illustration of the geographical distribution of marine animals, and the more accurate determination of the fossils of the
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Early dredging samplers did not have a closing device, and many organisms were washed out. This led to a mistaken impression that the deep-sea bed lacked species diversity, as theorised by Forbes in his
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In the 20th century the 'anchor-dredge' was developed to sample deep burrowing animals. It is not towed but digs in, and is released, in the manner of an anchor.
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were published. This was remarkable for clearly distinguishing the marine fauna of that portion of the French coast into four zones.
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Specimens of benthic invertebrates collected via dredge sampling during research expeditions in the Indian Ocean
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John J. Dickinson and Andrew G. Carey, Jr.A comparison of two benthic infaunal samplers ASLO Vol 20 issue 5
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This article is about scientific dredging equipment. For dredging equipment used in commercial fishing, see
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designed by Robert
Hessler showed that deep-sea bottoms are sometimes rich in soft-bottom benthic species.
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McIntyre, A.D., Elliot, J.M., and Ellis, D.V. 1984. Introduction: Design of sampling programmes. In:
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The wide variety of dredges and other benthic sampling equipment makes site comparison difficult.
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236:(N.A. Holme and A.D. McIntyre, eds.), pages 1–26. Blackwell Scientific, Oxford.
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living on a rocky bottom or burrowing within the smooth muddy floor of the
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Forster, G. R. 1953 A New Dredge for
Collecting Burrowing Animals
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Marine ecologists aboard a research ship and next to a dredge winch
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and in 1830 the results of two dredging expeditions undertaken by
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Fathoming the Ocean:The
Discovery and Exploration of the Deep Sea
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Müller's design was modified by the Dublin naturalist
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234:Methods for the study of marine benthos
220:Methods for the Study of Marine Benthos
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261:Harvard University Press
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98:Jean Victoire Audouin
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254:(1953), 32 :193-198.
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118:Pliocene
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69:History
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