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3.4<br />
Riedl , R. (1955). Aufsammlung tiefer Meeresboden in abgegrenzten<br />
Schichten und Flachen. (On sampling the upper layers and surface of<br />
the sea bottom in deep water) (In German). Arch. Hydrobiol. 51, 189-<br />
208. [Sledge-dredge similar to, but more elaborate than, that<br />
described by Bieri & Tokioka (1968)] R, MC, Mar<br />
Robertson, D. (1868). On marine dredging. Proc. nat. Hist. Soc. Glasg.<br />
1, 179-88. [Bucket dredge, diameter 20 cm and length 38 cm, digs<br />
into mud until full and takes about 8 l of mud] R, M, Mar<br />
Ruello, N.V. (1975). A small beam trawl for sampling surface or demersal<br />
and benthic animals. Bull. Aust. Soc. Limnol. No. 6, 9-16. [Mouth<br />
of net is 1.2 m wide; originally used to sample prawns in an estuary]<br />
R, MC, FW<br />
Smith, J.E. (1932). The shell gravel deposits, and the infauna of the<br />
Eddystone grounds. J. mar. biol. Ass. U.K. 18, 243-278. [Conical<br />
dredge with canvas bag] R, MC, Mar<br />
Steiner, G. (1919). Untersuchungsverfahren und Hilfsmittel zur Erforschung<br />
der Lebewelt der Gewasser. (Study methods and aids for the<br />
investigation of water life) (In German). Handbuch der Mikroskop.<br />
Technik. pt. 7 & 8, 1-148. [Describes the dredges of Forel and<br />
Steinmann] R, MCL, FW<br />
Taylor, J.L. (1965). Bottom samplers for estuarine research. Chesapeake<br />
Sci. 6, 233-234. [Describes a bucket dredge and a bottom drag]<br />
R, MC, Mar<br />
Thomson, C.W. (1873). The depths of the sea. London. Macmillan. 527 pp.<br />
[Describes O.F. Muller's dredge, first described in 1779] R, MC, Mar<br />
Tonolli, V. (1962). Nuovi strumenti per la raccolta e la separazione<br />
dei popolamente bentonici. (A new instrument for the collection and<br />
separation of benthic populations) (In Italian). Pubbl. Staz. zool.<br />
Napoli, 32 (Suppl.), 20-29. [Large cylinder rotates as it is pulled<br />
along the bottom and takes in sediment through a small opening;<br />
modified slightly by Bonomi (1969)] R, M, FW<br />
Usinger, R.L. & Needham, P.R. (1956). A drag type riffle-bottom sampler.<br />
Progve Fish Cult. 18. 42-44. [Dredge with rectangular mouth, 46 cm<br />
wide by 13 cm high, and with rakes along mouth] R, CL, FW<br />
3.4. ANCHOR DREDGES<br />
[Samplers that dig in at one place and are not towed along]<br />
Carey, A.G. & Hancock, D.R. (1965). An anchor-box dredge for deep-sea<br />
sampling. Deep-Sea Res. 12, 983-984. R, MC, Mar<br />
Forster, G.R. (1953). A new dredge for collecting burrowing animals.<br />
J. mar. biol. Ass. U.K. 32, 193-8. [Digs to depth of about 20 cm,<br />
mouth of net 45 cm wide and 24 cm high, weight 35 kg] R, MC, Mar<br />
Holme, N.A. (1961). The bottom fauna of the English Channel. J. mar.<br />
biol. Ass. U.K. 41, 397-461. [Double-sided anchor dredge that does<br />
not dig as deep as Forster's and that tends to drag through the sediment]<br />
R, MC, Mar<br />
18