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The CD-ROM Zooplankton and Micronekton of the North Sea was composed by:

Matthijs van Couwelaar
ETI, University of Amsterdam
Mauritskade 61
NL-1092 AD Amsterdam
The Netherlands

© 2003 ETI. ISBN 90-75000-56-1 (Macintosh and Windows).

With most welcome contributions to species descriptions and identification keys from ETI colleagues:

• Wijnand Heitmans
• Mario de Kluijver
• André van Nieuwenhuizen
• Huub Veldhuijzen van Zanten
• Henk Visser

And with highly appreciated work on illustrations by ETI colleagues:

• Tekla Boersma
• Sarita Ingalsuo
• Ulrike May
• Eva Piqué Ripoll

Acknowledgements — We wish to thank all persons who were involved in some way in this project; special thanks go to:

• Rob Heijman (ETI), co-ordination
• Peter Schalk (director ETI), initiator of the project
• Rob van Soest (University of Amsterdam), supervision

Next, special thanks to all those persons who kindly have made material available — either as keys, text, illustrations, or photo's, etc.; and to all persons that gave permission to reproduce their published illustrations and photo's:

• Martin Angel (Southampton Oceanography Centre) — for his key, illustrations and text of Ostracoda from the CD-ROM Marine Planktonic Ostracods [In: Angel, 2000].
• Heather Angel — for her photo of Clione l. l. minuta.
• Mario de Kluijver (ETI) — for his keys and descriptions from the CD-ROM with North Sea Crustacea [In; De Kluijver et al., in prep.], Cephalopoda and Polychaeta [In: De Kluijver et al., 2000a and De Kluijver et al., 2000b respectively].
• R. Fenaux (France) — for for his drawings of Appendicularia [In: Fenaux, 1967].
• Per Flood (Bathybiologica A/S, Bergen) — for his drawing of a typical appendicularian [In: Bone, 1998. By kind permission of Oxford University Press].
• J.E.A. Godeaux (Université de Liège) — for his drawings of Thaliacea [In: Bone, 1998. By kind permission of the Oxford University Press].
• Steve Hay (Aberdeen Marine Laboratory) — for his long list of plankton species, based on a large collection of samples from the NW North Sea; and also for his comments and advise during the project.
• Peter Hayward (University of Wales, Swansea) — for the numerous drawings of mostly crusaceans [In: Hayward and Ryland, 1990 and Hayward and Ryland, 1995. By kind permission of Oxford University Press].
• Helga Kapp (Frankfurt am Main) — for her detailed illustrations of Appendicularia [In: Bückmann and Kapp, 1975].
• R. Lipmann — photo of Sepiola atlantica [In: De Kluijver et al., 2000a].
Larry P. Madin (Woods Hole Oceanographic Institution) — for photo's of Thaliacea [In: Bone, 1998. By kind permission of the Oxford University Press].
• L. Newman — for her photo's of pelagic gastropods [In: Van der Spoel et al., 1997].
• Mark Ohman (Scripps Institution of Oceanography) — for his kind permission to use illustrations, photo's and text of Euphausiaceafrom the CD-ROM Euphausiids of the World Ocean [In: Brinton et al., 1999].
• Annelies Pierrot-Bults (University of Amsterdam) — for her drawings of Chaetognatha.
• Phil R. Pugh (Southampton Oceanography Centre) — for his drawings, photo's and key to Siphonopora.
• Clyde Roper (Smithsonian Institution) — for his kind permission to use illustrations of larval and juvenile cephalopods [In: Sweeney et al., 1992].
• Southampton Oceanography Centre — photo of Siphonophora
• A.S. Tulp (Nijega, The Netherlands) — for his drawings of Eucheilota flevensis. and Eucheilota maculata. [In: Tulp, 2001a. By kind permission of Het Zeepaard].
• Siebrecht van der Spoel (Bussum, The Netherlands) — for his descriptions, drawings and photo's of pelagic Gastropoda from the CD-ROM Pelagic Molluscs of the World. [In: Van der Spoel et al., 1997].
• The Sir Alister Hardy Foundation for Ocean Science (Plymouth) by courtesy of Sonia Batten and Darren Stevens — for the zooplankton species list based on samples from the North Sea during the Continuous Plankton Recorder Survey.
• Rob van Soest (University of, Amsterdam) — for his drawing and photo's of Salpida.
• Wim Vervoort (Naturalis, Leiden) — for his advise on nomenclature, taxonomy, and other most welcome contributions with respect to the Leptolida.

Our thanks go also to the publishers that kindly allowed us to use material from their publications:

• Cambridge University Press — with respect to illustrations in Russell, 1953a; Russell, 1970a.
• Oxford University Press — for illustrations in Bone, 1998; Hayward and Ryland, 1990; Hayward and Ryland, 1995.
• The Linnaean Society of London — for illustrations from the Synopses of the British Fauna, Volumes 3, 5, 7, 10, 13, 15, 20, 29, 30, 39, 45, 48, 50.
• Conseil International pour l'Exploration de la Mer (ICES), in the person of Mrs. J. Rosenmeier — for numerous illustrations in the extended series of the so called Fiches d'Identification du Zooplancton or Plankton Sheets.

Credits — Illustrations were used from the following references, of which those marked with an * asterisk were already included on the ETI-CD-ROMS on Ostracoda (Angel, 2000); Euphausiacea (Brinton et al, 1999); Cephalopoda and Gastropoda (De Kluijver et al, 2000a); Polychaeta (De Kluijver et al., 2000b); some groups of Crustacea (De Kluijver et al., in prep.).

Angel, 2000* — Ostracoda
Angel, 1993 — Ostracoda
Baker et al., 1990* — Euphausiacea
Barrois, 1877 — Bryozoa
Benham, 1896* — Polychaeta
Berrill, 1950 — Ascidiacea (larva)
Blacker, 1957 — Decapoda
Boden et al., 1955* — Euphausiacea
Bovallius, 1887 — Amphipoda
Brinton and Wyllie, 1976* — Euphausiacea
Brinton et al., 1999 — Euphausiacea
Brinton, 1975* — Euphausiacea
Browne, 1903 — Medusae
Bückmann and Kapp, 1975 — Appendicularia
Chevreux and Fage, 1925 — Amphipoda
Cornelius, 1995a — Medusae
De Selys Longchamps, 1904 — Actinotrocha
Della Croce, 1974 — Cladocera
Dunbar, 1963 — Amphipoda
Edwards, 1978 — Medusae
Edwards, 1983 — Medusae
Einarsson, 1942 — Euphausiacea
Fenaux, 1967 — Appendicularia
Flood and Deibel, 1998 — Appendicularia
Flößner, 1972 — Cladocera
Foxton, 1961 — Salpida
Fransen and Smeenk, 1991* — Amphipoda
Fraser, 1981 — Appendicularia
Fraser, 1981 — Thaliacea
Fretter and Pilkington, 1970 — Gastropoda
Giesbrecht, 1910 — Stomatopoda
Godeaux et al., 1998 — Thaliacea
Godeaux, 1998 — Thaliacea
Gopalakrishnan, 1975* — Euphausiacea
Graham, 1988* — Gastropoda
Greve, 1975 — Ctenophora
Guglielmo et al., 1997* — Euphausiacea
Gurney, 1942 — Decapoda larva
Hansen, 1911* — Euphausiacea
Hartmann-Schröder, 1996* — Polychaeta
Hayward and Ryland, 1989 — Bryozoa
Hayward and Ryland, 1990 — Polychaeta
Hayward and Ryland, 1990 — Decapoda
Hayward and Ryland, 1990 — Cephalopoda
Hayward and Ryland, 1990 — Cirripedia
Hayward and Ryland, 1990 — Cumacea
Hayward and Ryland, 1990 — Isopoda
Hayward and Ryland, 1995 — Decapoda
Hannerz, 1961* — Polychaeta
Holthuis, 1946 — Decapoda
Holthuis, 1956* — Isopoda
Imajima, 1972* — Polychaeta
Jones, 1957b — Cumacea
Jones, 1976 — Cumacea
Kathman et al., 1986* — Euphausiacea
Kemp, 1910 — Decapoda
Kirkegaard, 1992* — Polychaeta
Kirkegaard, 1996* — Polychaeta
Kirkpatrick and Pugh, 1984 — Siphonophora
Kramp and Damas, 1925 — Medusae
Kramp, 1959 — Medusae
Laursen, 1953* — Gastropoda
Leloup, 1954 — Ceriantharia
Liley, 1958 — Ctenophora
Lohmann, 1896 — Appendicularia
Lohmann, 1911 — Ascidiacea (larva)
Lohmann, 1931 — Appendicularia
Mauchline, 1984 — Stomatopoda
Metcalf and Hopkins, 1919 — Thaliacea
Monod, 1926 — Isopoda
Muus, 1959* — Cephalopoda
Muus, 1963c — Cephalopoda
Naef, 1928* — Cephalopoda
Naylor, 1957a — Isopoda
Nemoto, 1966* — Euphausiacea
Nesis, 1987* — Cephalopoda
Nierstrasz and Schuurmans Stekhoven, 1930* — Isopoda
Nilsson-Cantell, 1978* — Cirripedia
Nyholm, 1944 — Ceriantharia
Pfeffer, 1912* — Cephalopoda
Pierrot-Bults and Chidgey, 1988 — Chaetognatha
Pike and Williamson, 1958 — Decapoda larva
Pleijel and Dales, 1991 — Polychaeta
Rees and Lumby, 1954 — Cephalopoda
Rees, 1956 — Cephalopoda
Rice, 1967 — Decapoda
Richardson, 1905* — Isopoda
Russell, 1939 — Medusae
Russell, 1950a — Medusae
Russell, 1950b — Medusae
Russell, 1953a — Medusae
Russell, 1953b — Medusae
Russell, 1955 — Medusae
Russell, 1963a — Medusae
Russell, 1963b — Medusae
Russell, 1963c — Medusae
Russell, 1963d — Medusae
Russell, 1970a — Medusae
Russell, 1970b — Medusae
Russell, 1976 — Medusae
Russell, 1977a — Medusae
Russell, 1977b — Medusae
Russell, 1978a — Medusae
Russell, 1978b — Medusae
Sars, 1890 — Amphipoda
Sars, 1890 — Isopoda
Sars, 1891 — Pycnogonida
Sars, 1899 — Isopoda
Sars, 1900 — Cumacea
Sewell, 1953 — Thaliacea
Shih and Dunbar, 1963 — Amphipoda
Sivertsen and Holthuis, 1956 — Decapoda
Smaldon, 1979 — Decapoda
Smaldon, 1993 — Decapoda
Step, 1927* — Cephalopoda
Sweeney et al., 1992 — Cephalopoda
Tattersall and Tattersall, 1951 — Mysidacea
Totton, 1965 — Siphonophora
Tulp, 2001a — Medusae
Uschakov, 1955 — Polychaeta
Van der Spoel et al., 1997 — Gastropoda
Van der Spoel, 1972* — Gastropoda
Van Kampen, 1922 — Medusae
Von Graff, 1913 — Platyhelminthes
Voss and Williamson, 1972* — Cephalopoda
Webb, 1956 — Branchiostoma
Wickstead, 1967 — Branchiostoma
Williamson, 1957a — Decapoda
Williamson, 1983 — Decapoda
Wilson, 1978Luidia spp
Wolff, 1966* — Isopoda
Zariquiey Alvarez, 1968 — Decapoda