*In Memoriam - Chris Smeenk* *July 6, 1942 – March 23, 2017* By Uko Gorter, Thomas A. Jefferson, and Giuseppe Notarbartolo di Sciara Chris Smeenk, marine mammal biologist and retired Curator of Mammals at the Naturalis Biodiversity Center, formerly known as the "Rijksmuseum van Natuurlijke Historie" (RMNH), in Leiden, Netherlands, lost his battle with cancer and complications of the heart on March 23. While Chris wrote his thesis on the* Comparative-ecological studies of some East African Birds of Prey* (Smeenk 1974), based on his field work in Tsavo National Park East, his main passion was for cetaceans and he devoted much of his career to these animals. In 1976, Chris was appointed as Curator of Mammals at the Rijksmuseum van Natuurlijke Historie in Leiden, following A. M. Husson. For about thirty years, Chris functioned as stranding coordinator for ‘Naturalis', which is the continuation of the RMNH. He collected stranding data on cetaceans and other marine mammals along the Dutch coast. A series of reports on these data were published in *Lutra*, the journal of the Dutch Mammal Society, which Chris edited for many years. As such he continued this important work by A. M. Husson and P. J. H. van Bree, first initiated by A. B. van Deinse in 1931. Among his accomplishments, Chris documented the decline of harbor porpoises in European waters, investigated West African and Red Sea marine mammals, and took a keen interest in the rare mass strandings of sperm whales in the North Sea; he wrote about these historical events in a number of publications. Chris was very meticulous in his historical research on marine mammals, which is reflected in his extensive published work (see list below). In addition, Chris guided many students with their research on the ecology of whales, reproductive biology of harbor porpoises, and population structure of a number of delphinid species (e.g., common dolphins, bottlenose dolphins, and white-beaked dolphins). He was also a founding member of the European Cetacean Society. Most recently, Chris, along with Kees Camphuysen, contributed several cetacean species accounts to the newly-published Atlas of Mammals in the Netherlands (Broekhuizen et al., 2016). Chris' last contribution in the marine mammal field was to a publication on cetaceans of the Red Sea (Notarbartolo di Sciara et al., in press) and is still forthcoming. It will be dedicated in his memory. Chris loved music and enjoyed playing his house pipe organs. He is survived by his loving wife, Nellie. *Literature Cited* Broekhuizen, S., K. Spoelstra, J.B.M. Thissen, K.J. Canters, & J.C Buys (Eds.) 2016. *Atlas van de Nederlandse Zoogdieren*. Natuur van Nederland 12. Naturalis Biodiversity Center & EIS Kenniscentrum insecten en andere ongewervelden. Notarbartolo di Sciara, G., D. Kerem & C. Smeenk (Editors). In press. Cetaceans of the Red Sea. CMS Technical Series. Smeenk, C. 1974. Comparative-ecological studies of some East African birds of prey. Ph.D. dissertation, Free University of Amsterdam, Netherlands. *Marine Mammal Publications - C. Smeenk* 1978 Bree, P.J.H. van & C. Smeenk. Strandingen van Cetacea op de Nederlandse kust in 1976 en 1977. - Lutra, 20: 13-18. 1980 Smeenk, C. Walvisvangst: toch iets bereikt. - Natuur en Milieu, 80 (11): 29-30. 1982 Bree, P.J.H. van & C. Smeenk. Strandingen van Cetacea op de Nederlandse kust in 1978, 1979 en 1980. - Lutra, 25: 19-29. Smeenk, C. De plaats van de zeehonden in het systeem der zoogdieren. - Tijdschrift voor Diergeneeskunde, 107: 358-362. 1985 Berg, A.B. van den, C.W.A. Bosman, G.C. Cadée, B.J.M. Haase, A.M. van der Niet & C. Smeenk. Observations of seabirds and cetaceans: 3-1 - 3-19. In: The Snellius-II Expedition progress report. Homeward voyage Tanjung-Priok - Den Helder MV. Tyro via Indian Ocean and Mediterranean Sea June 14 - August 2 1985. Royal Netherlands Academy of Arts and Sciences / Indonesian Institute of Sciences. Smeenk, C. Whales and sea birds: 6-10. In: The Snellius-II Expedition progress report. Theme II. Ventilation of deep sea basins. Cruise MV. Tyro January 4 - February 6 1985. Royal Netherlands Academy of Arts and Sciences / Indonesian Institute of Sciences. 1986 Smeenk, C. Strandingen van Cetacea op de Nederlandse kust in 1981, 1982 en 1983. - Lutra, 29: 268-281. Smeenk, C. Boekbespreking. Stephen Leatherwood & Randall R. Reeves, 1983. The Sierra Club handbook of whales and dolphins. - Lutra, 29: 330. 1987 Bakker, J. & C. Smeenk. Time-series analysis of *Tursiops truncatus*, *Delphinus delphis*, and *Lagenorhynchus albirostris *strandings on the Dutch coast: 14-19. In: J.W. Broekema & C. Smeenk (eds). The European Cetacean Society report of the 1987 meeting Hirtshals, Denmark, 26-28 January 1987. - ECS Newsletter, 1. Broekema, J.W. & C. Smeenk (eds). The European Cetacean Society report of the 1987 meeting Hirtshals, Denmark, 26-28 January 1987. - ECS Newsletter, 1: 1-77. Evans, P.G.H., R.H.H. Kröger, C.C. Kinze & C. Smeenk. Statement of concern. The decline of the harbour porpoise in the North Sea: 6 pp. European Cetacean Society, Oxford. Smeenk, C. De bruinvis in de Nederlandse wateren. - Argus, 12 (1): 9-12. Smeenk, C. The harbour porpoise *Phocoena phocoena *(L., 1758) in The Netherlands: stranding records and decline. - Lutra, 30: 77-90. [Smeenk, C.]. De European Cetacean Society en de bruinvis. - Lutra, 30: 91-92. Smeenk, C. & P.A.M. Gaemers. Fish otoliths in the stomachs of white-beaked dolphins *Lagenorhynchus albirostris*: 12-13. In: J.W. Broekema & C. Smeenk (eds). The European Cetacean Society report of the 1987 meeting Hirtshals, Denmark, 26-28 January 1987. - ECS Newsletter, 1. 1988 Smeenk, C. Stranding records of the harbour porpoise *Phocoena phocoena *from the Netherlands: 101-104. In: P.G.H. Evans (ed.). European Research on Cetaceans. Proceedings of the second annual conference of the European Cetacean Society, Tróia, Portugal, 5-7 February 1998 [verkeerde titel boven artikel; correcte titel vermeld in inhoudsopgave]. Smeenk, C. De bruinvis terug in de Waddenzee: illusie of werkelijkheid? - Waddenbulletin, 23: 186-188. 1989 Addink, M. & C. Smeenk. Stranding records of the harbour porpoise *Phocoena phocoena *in the Netherlands: 1970-1987: 111-114. In: P.G.H. Evans & C. Smeenk (eds). European Research on Cetaceans - 3. Proceedings of the third annual conference of the European Cetacean Society, La Rochelle, France, 24-26 February 1989. Evans, P.G.H. & C. Smeenk (eds). European Research on Cetaceans - 3. Proceedings of the third annual conference of the European Cetacean Society, La Rochelle, France, 24-26 February 1989: 1-132. Evans, P.G.H., C. Smeenk, M.J. Addink & J. Bakker (eds). Report of the international workshop on the harbour porpoise at the Sea Mammal Research Unit, Cambridge, 29-30 November and 1 December 1988. - European Cetacean Society Newsletter, - 6 special issue: 1-21. Smeenk, C. Witsnuitdolfijnen en wat dies meer zij. - Infusis [Intern Informatieblad van het Nationaal Natuurhistorisch Museum, Leiden], 8: 2-4. Smeenk, C. Strandingen van Cetacea op de Nederlandse kust in 1984, 1985 en 1986. - Lutra, 32: 164-180. 1990 Addink, M. & C. Smeenk. De tuimelaar van de Brouwersdam. - Zoogdier, 1 (4): 23-25 [ontvangen februari 1991]. Bakker, J. & C. Smeenk. Dolphins on the Dutch coast: an analysis of stranding records. - Lutra, 33: 190-191. Bakker, J. & C. Smeenk. Dolphins on the Dutch coast: an analysis of stranding records: 49-52. In: P.G.H. Evans, A. Aguilar & C. Smeenk (eds). European Research on Cetaceans - 4. Proceedings of the fourth annual conference of the European Cetacean Society, Palma de Mallorca, Spain, 2-4 March 1990. Evans, P.G.H., A. Aguilar & C. Smeenk (eds). European Research on Cetaceans - 4. Proceedings of the fourth annual conference of the European Cetacean Society, Palma de Mallorca, Spain, 2-4 March 1990: 1-140. Smeenk, C. Witsnuitdolfijnen in storm en branding. - Infusis, Intern Informatieblad van het Nationaal Natuurhistorisch Museum, Leiden, 18: 2-3. Smeenk, C. Boekbespreking. Peter G.H. Evans, 1987. The natural history of whales and dolphins. - Lutra, 33: 82-84. Smeenk, C. & M.J. Addink. De potvis van Terschelling. - Infusis, Intern Informatieblad van het Nationaal Natuurhistorisch Museum, Leiden, 20: 1-2. Smeenk, C. & M.J. Addink. The harbour porpoise in Dutch waters: evidence from stranding records. - International Whaling Commission, SC/42/SM27: 1-8. Smeenk, C. & M. Addink. “Massastranding” op de Nederlandse kust. Witsnuitdolfijnen in storm en branding. - Zoogdier, 1 (1): 5-9. Smeenk, C. & M. Addink. De potvis van Terschelling. - Zoogdier, 1 (2): 18-23. 1991 Addink, M. Tuimelaar van Brouwersdam dood. - Zoogdier, 2 (3): 32. Fransen, C.H.J.M. & C. Smeenk. Whale-lice (Amphipoda: Cyamidae) recorded from The Netherlands. - Zoologische Mededelingen Leiden, 65: 393-405 [ontvangen februari 1992]. Smeenk, C. Al is de leugen nog zo snel… De butskop van 1958. - Zoogdier, 2 (1): 14-15. Smeenk, C. Loos alarm. Bruinvissterfte in Nederland. - Zoogdier, 2 (3): 23-24. 1992 Sliggers, B.C. & C. Smeenk. Chronologisch overzicht van potvisstrandingen aan de Nederlandse en Belgische kust: 101-108. In: B.C. Sliggers & A.A. Wertheim (eds). ‘Op het strand gesmeten’. Vijf eeuwen potvisstrandingen aan de Nederlandse kust. Walburg Pers, Zutphen. Smeenk, C. Vijf eeuwen potvisstrandingen in Teylers Museum. - Infusis, Intern Informatieblad van het Nationaal Natuurhistorisch Museum, 40: 1-2. Smeenk, C. De Windbreker en walvissen. - De Windbreker, 50: 1-2. Smeenk, C. Strandingen van Cetacea op de Nederlandse kust in 1987, 1988 en 1989. - Lutra, 35: 51-66. Smeenk, C. Walvisachtigen en wetlands: 10-11. In: M. Weisz (ed.). Manifest bedreigingen en kansen voor zoogdieren en wetlands. Vereniging voor Zoogdierkunde en Zoogdierbescherming, Utrecht. - VZZ-Mededelingen, 8. Smeenk, C. Boekbespreking. Klaus Barthelmeß & Joachim Münzing, 1991. Monstrum horrendum. Wale und Walstrandungen in der Druckgraphik des 16. Jahrhunderts und ihr motivkundlicher Einfluß. - Lutra, 35: 123-131. Smeenk, C. & M.J. Addink. De potvis: 9-33. In: B.C. Sliggers & A.A. Wertheim (eds). ‘Op het strand gesmeten’. Vijf eeuwen potvisstrandingen aan de Nederlandse kust. Walburg Pers, Zutphen. Smeenk, C. & M. Addink. De bruinvis nader onderzocht. Hoe kan de achteruitgang worden verklaard? - Argus, 17 (4): 4-7 [ontvangen januari 1993]. Smeenk, C., M.F. Leopold & M.J. Addink. Note on the harbour porpoise *Phocoena phocoena *in Mauritania, West Africa. - Lutra, 35: 98-104. 1993 Addink, M.J., M. García Hartmann & C. Smeenk. Some aspects on cetaceans stranded in the Netherlands, 1990-1992: 171. In: P.G.H. Evans (ed.). European Research on Cetaceans - 7. Proceedings of the seventh annual conference of the European Cetacean Society, Inverness, Scotland, 18-21 February 1993 [ontvangen maart 1994]. Addink, M.J., M. García Hartmann, C. Smeenk, P. Mulder & A.J.I.M. Verhoeven. Aspects of biology and pollutant levels in harbour porpoises *Phocoena phocoena *(L.) stranded on the Dutch coast, 1990-1993: 20. In: Abstracts tenth bennial conference on the biology of marine mammals, Galveston, Texas, U.S.A. November 11-15, 1993. Smeenk, C. Cetaceans and seabirds: 22-24. In: MARFLUX - 5. En-route programme Djibouti-Gibraltar with R.V. Tyro 9-3-1993 till 26-3-1993. Shipboard report. Smeenk, C. Een butskop gestrand in Noord-Holland. - Zoogdier, 4 (3): 37-38. Smeenk, C. & M.J. Addink. Sea lions: 2pp. In: G.W. Ackers (ed.). The Charles Darwin Foundation for the Galápagos Islands. Smeenk, C. & M.J. Addink. De bruinvis. - Folder IKC-NBLF, 4: 6pp. Informatie- en KennisCentrum Natuur, Bos, Landschap en Fauna, Wageningen. Smeenk, C. & M.J. Addink. Walvisvaart leidt tot marginaal economisch gewin: 7. - Algemeen Dagblad, 22 mei 1993. Smeenk, C. & M.J. Addink. Sighting of a group of sperm whales *Physeter macrocephalus *in Dutch waters, with historical notes and the possible Orkney connection. - Lutra, 36: 25-29. Smeenk, C., M. Addink & M. García Hartmann. Vreeemde walvissen op onze kusten. Deel 1: spitssnuitdolfijnen. - Zoogdier, 4 (4): 20-26 [ontvangen januari 1994]. 1994 Addink, M.J., M. García Hartmann, C. Smeenk, P. Mulder & A.J.I.M. Verhoeven. Aspects of biology and pollutant levels in harbour porpoises *Phocoena phocoena *stranded on the Dutch coast, 1990-1993: 213. In: P.G.H. Evans (ed.). European Research on Cetaceans - 8. Proceedings of the eighth annual conference of the European Cetacean Society, Montpellier, France 2-5 March 1994 [ontvangen februari 1995]. Smeenk, C. Potvissen. - Infusis. Intern Informatieblad van het Nationaal Natuurhistorisch Museum, Leiden, 69: 1-3. Smeenk, C., M. Addink & M. García Hartmann. Vreemde walvissen op onze kusten. Deel 2: de butskop. - Zoogdier, 5 (2): 8-15. Smeenk, C. & J. Van Gompel. Invasie van potvissen. Walvisstrandingen in november 1994. - Zoogdier, 5 (4): 18-22 [ ontvangen februari 1995]. 1995 Addink, M.J., M. García Hartmann & C. Smeenk. The harbour porpoise *Phocoena phocoena *in Dutch waters: life history, pathology and historical records. - International Whaling Commission, SC/47/SM5: 1-8, figs 1-3, table 1. Smeenk, C. Strandingen van Cetacea op de Nederlandse kust in 1990, 1991 en 1992. - Lutra, 38: 90-104 [ontvangen januari 1996]. Smeenk, C., M.J. Addink & H. Richards. Some observations on the behavior of wild rough-toothed dolphins *Steno bredanensis*: 1p. In: Abstract book of the 11th biennial conference on marine mammals, Orlando, Florida, 14-18 December 1995. 1996 Kinze, C.C., M. Addink, C. Smeenk, M. García Hartmann, H.W. Richards, R. Sonntag & H. Benke. Status of the white-beaked dolphin (*Lagenorhynchus albirostris*) and the white-sided dolphin (*Lagenorhynchus acutus*) in the North and Baltic Seas. - International Whaling Commission, SC/48/SM17: 1-10. Kompanje, E.J.O. & C. Smeenk. Recent bones of right whales *Eubalaena glacialis *from the southern North Sea. - Lutra, 39: 66-75 [ontvangen januari 1997]. Scheppingen, W.B. van, A.J.I.M. Verhoeven, P. Mulder, M.J. Addink & C. Smeenk. Polychlorinated biphenyls, dibenzo-*p*-dioxins, and dibenzofurans in harbor porpoises (*Phocoena phocoena*) stranded on the Dutch coast between 1990 and 1993. - Archives of Environmental Contamination and Toxicology, 30: 492-502. Smeenk, C. Sperm whale scientific symposium, Belgium, November 1995. - European Cetacean Society Newsletter, 27: 9-11. Smeenk, C. Twee zeldzame dolfijnen gestrand. - Zoogdier, 7 (3): 34. Smeenk, C., M.J. Addink, A.B. van den Berg, C.A.W. Bosman & G.C. Cadée. Sightings of *Delphinus *cf. *tropicalis *Van Bree, 1971 in the Red Sea. - Bonner zoologische Beiträge, 46: 389-398. 1997 Addink, M.J. & C. Smeenk. Analysis of harbour porpoise *Phocoena phocoena *stranding records in the Netherlands: 1920-1994: 225. In: P.G.H. Evans (ed.). European Research on Cetaceans - 10. Proceedings of the tenth annual conference of the European Cetacean Society, Lisbon, Portugal 11-13 March 1996. Kinze, C.C., M. Addink, C. Smeenk, M. García Hartmann, H.W. Richards, R.P. Sonntag & H. Benke. The white-beaked dolphin (*Lagenorhynchus albirostris*) and the white-sided dolphin (*Lagenorhynchus acutus*) in the North and Baltic Seas: review of available information. - Reports of the International Whaling Commission, 47: 675-681. Rudolph, P., C. Smeenk & S. Leatherwood. Cetaceans in the Indonesian Archipelago: a preliminary checklist: 114. In: P.G.H. Evans, E.C.M. Parsons & S.L. Clark (eds). European Research on Cetaceans - 11. Proceedings of the eleventh annual conference of the European Cetacean Society, Stralsund, Germany 10-12 March 1997 [ontvangen januari 1998]. Rudolph, P., C. Smeenk & S. Leatherwood. Preliminary checklist of Cetacea in the Indonesian Archipelago and adjacent waters. - Zoologische Verhandelingen Leiden, 312: 1-48 [ontvangen januari 1998]. Smeenk, C. Sperm whale strandings around the North Sea: history and patterns: 167. In: P.G.H. Evans (ed.). European Research on Cetaceans - 10. Proceedings of the tenth annual conference of the European Cetacean Society, Lisbon, Portugal 11-13 March 1996. Smeenk. C. Massale stranding op de kust: wat is er aan de hand? Het gaat goed met de potvis. - Friesch Dagblad, 5 december 1997: 5. Smeenk, C. Strandings of sperm whales *Physeter macrocephalus *in the North Sea: history and patterns: 15-28. In: T.G. Jacques & R.H. Lambertsen (eds). Sperm whale deaths in the North Sea. Science and management. - Bulletin de l’Institut Royal des Sciences Naturelles de Belgique, Biologie, 67 supplément [ontvangen februari 1998]. Waerebeek, K. Van, C. Smeenk & W.M.A. De Smet. Cuvier’s beaked whale *Ziphius cavirostris *in the North Sea, with a first record for the Netherlands (Scheldt estuary). - Lutra, 40: 1-8. 1998 Holthuis, L.B., C. Smeenk & F.J. Laarman. The find of a whale barnacle, *Cetopirus complanatus *(Mörch, 1853), in 10th century deposits in the Netherlands: 349-363. In: J.C. den Hartog, A.C. van Bruggen, P.F.S. Cornelius & L.P. van Ofwegen (eds). Commemorative volume for the 80th birthday of Willem Vervoort in 1997. - Zoologische Verhandelingen Leiden, 323 [ontvangen januari 1999]. Jauniaux, T., L. Brosens, E. Jacquinet, D. Lambrigts, M. Addink, C. Smeenk & F. Coignoul. Postmortem investigations on winter stranded sperm whales from the coasts of Belgium and the Netherlands. - Journal of Wildlife Diseases, 34: 99-109. 1999 Addink, M.J. & C. Smeenk. The harbour porpoise *Phocoena phocoena *in Dutch coastal waters: analysis of stranding records for the period 1920-1994. - Lutra, 41: 55-80. Reeves, R.R., C. Smeenk, R.L. Brownell, Jr & C.C. Kinze. Atlantic white-sided dolphin *Lagenorhynchus acutus *(Gray, 1828): 31-56. In: S.H. Ridgway & R. Harrison (eds). Handbook of marine mammals. Volume 6. The second book of dolphins and the porpoises. Academic Press, San Diego/London [ontvangen september 1998]. Reeves, R.R., C. Smeenk, C.C. Kinze, R.L. Brownell, Jr & J. Lien. White-beaked dolphin *Lagenorhynchus albirostris *Gray, 1846: 1-30. In: S.H. Ridgway & R. Harrison (eds). Handbook of marine mammals. Volume 6. The second book of dolphins and the porpoises. Academic Press, San Diego/London [ontvangen september 1998]. Smeenk, C. A historical review: 6-9. In: S. Tougaard & C.C. Kinze (eds). Proceedings from the workshop Sperm whale strandings in the North Sea. The event - the action - the aftermath. Rømø, Denmark 26-27 May 1998. - Fisheries and Maritime Museum, Esbjerg, Biologial Papers, 1. 2000 Addink, M.J. & C. Smeenk. The harbour porpoise *Phocoena phocoena *in Dutch coastal waters: analysis of stranding records for the period 1920-1994: 5. In: Deutsche Gesellschaft für Säugetierkunde. 74. Jahrestagung und Vereniging voor Zoogdierkunde en Zoogdierbescherming. Gemeinsame Tagung Groningen, 24. bis 28. September 2000. Kurzfassungen der Vorträge und Posterdemonstrationen. - Sonderheft Zeitschrift für Säugetierkunde. Smeenk, C., M. Addink & G. Cadée. Turen naar tuimelaars en spinners. - Bionieuws, 10 (10): 5. 2001 Addink, M.J. & C. Smeenk. Opportunistic feeding behaviour of rough-toothed dolphins *Steno bredanensis* off Mauritania. - Zoologische Verhandelingen Leiden, 334: 37-48. Santos, M.B., G.J. Pierce, C. Smeenk, M.J. Addink, C.C. Kinze, S. Tougaard & J. Herman. Stomach contents of northern bottlenose whales *Hyperoodon ampullatus* stranded in the North Sea. - Journal of the Marine Biological Assiciation of the United Kingdom, 81: 143-150. 2002 Addink, M. & C. Smeenk. De *come-back* van de bruinvis: 110-111. In: R. Lange, A. Martens, K. Schulte Fischediek & F. van der Vliet (eds). Op zoek naar zoogdieren. 50 jaar Vereniging voor Zoogdierkunde en Zoogdierbescherming, 1952-2002. - KNNV Uitgeverij, Utrecht / Vereniging voor Zoogdierkunde en Zoogdierbescherming, Arnhem. [Titel door de redactie bedacht]. Rudolph, P. & C. Smeenk. Indo-West Pacific marine mammals: 617-625. In: W.F. Perrin, B. Würsig & J.G.M. Thewissen (eds). Encyclopedia of marine mammals. - Academic Press, San Diego/London. Santos, M.B., G.J. Pierce, M. García Hartmann, C. Smeenk, M.J. Addink, T. Kuiken, R.J. Reid, I.A.P. Patterson, C. Lordan, E. Rogan & E. Mente. Additional notes on stomach contents of sperm whales *Physeter macrocephalus* stranded in the north-east Atlantic. - Journal of the Marine Biological Association of the United Kingdom, 82: 501-507. Smeenk, C. Dolfijnensterfte in Frankrijk: massavangst en massastranding. Ook in de Noordzee is er veel mis. - Zoogdier, 13 (2): 16-22. Smeenk, C. De “Walvisch van Berkhey” en andere zeezoogdieren: 64-66. In: G. van der Bent & G. van Ommering (eds). Dwars door de duinen. Een verkenningstocht van Den Haag naar Noordwijk. - Van den Berg Kantoorboekhandel, Katwijk. 2003 Smeenk, C. Strandingen van Cetacea op de Nederlandse kust in 1993-1997. - Lutra, 46: 45-64. Smeenk, C., M. Addink & K. Camphuysen. De eerste bultrug voor Nederland. - Zoogdier, 14 (4): 3-4. 2004 García Hartmann, M., C. Smeenk, L. Fichtel & M. Addink. The diagnosis of by-catch: Examining harbour porpoises *Phocoena phocoena* stranded on the Dutch coast from 1990 to 2000: 1-23. - National Museum of Natural History (Naturalis), Leiden, The Netherlands / Zoo Duisburg, Duisburg, Germany. Smeenk, C. Aangespoelde walvissen en dolfijnen: wat vertellen ze ons? - Duin, 17 (2): 13-15. 2006 Smeenk, C. Historic records of stranded pilot whales. - Forest Science News, 2 (7): 3-4. [Indonesia] Smeenk, C. & M. Addink. Dolfijnen op reis: 28-29. In: A. Salman & F. van der Brugge (red.). Kust & Zee Gids 2006. Landelijke editie. - De Kustvereniging, Leiden. 2007 Pierce, G.J., M.B. Santos, C. Smeenk, A. Saveliev & A.F. Zuur. Historical trends in the incidence of strandings of sperm whales (*Physeter macrocephalus*) on North Sea coasts: An association with positive temperature anomalies. - Fisheries Research, 87: 219-228. 2008 Camphuysen, C.J., C. Smeenk, M. Addink, H. van Grouw & O.E. Jansen. Cetaceans stranded in the Netherlands from 1998 to 2007. - Lutra, 51: 87-122. Evans, P.G.H., C.H. Lockyer, C.S. [sic] Smeenk, M. Addink & A.J. Read. Genus *Phocoena*: 704-709. In: S. Harris & D.W. Yalden (eds). Mammals of the British Isles: Handbook, 4th edition. - The Mammal Society, Southampton. Evans, P.G.H., C.S. [sic] Smeenk & K. Van Waerebeek. Genus *Ziphius*: 690-692. - Ibidem. Evans, P.G.H. & C.S. [sic] Smeenk. Genus *Lagenorhynchus*: 724-727. - Ibidem Evans, P.G.H. & C.S. [sic] Smeenk. Genus *Leucopleurus*: 727-731. In: S. Harris & D.W. Yalden (eds). - Ibidem. Pierce, G.J., M.B. Santos, S. Murphy, J.A. Learmonth, A.F. Zuur, E. Rogan, P. Bustamente, F. Caurant, V. Lahaye, V. Ridoux, B.N. Zegers, A. Mets, M. Addink, C. Smeenk, T. Jauniaux, R.J. Law, W. Dabin, A. López, J.M. Alonso Farré, A.F. González, A. Guerra, M. García-Hartmann, R.J. Reid, C.F. Moffat, C. Lockyer & J.P. Boon. Biaoaccumulation of persistent organic pollutants in female common dolphins (*Delphinus delphis*) and harbour porpoises (*Phocoena phocoena*) from western European seas: Geographical trends, causal factors and effects on reproduction and mortality. - Environmental Pollution, 153: 401-415. 2009 Rudolph, P. & C. Smeenk. Indo-West Pacific marine mammals: 608-616. In: W.F. Perrin, B. Würsig & J.G.M. Thewissen (eds). Encyclopedia of marine mammals. Second edition. - Academic Press/Elsevier, Burlington/San Diego/New York/London. [geheel nieuw bewerkt] 2010 Addink, M.J., C. Smeenk, G.J. Pierce, K. Camphuysen & M.F. Leopold. Life-history of Dutch harbour porpoise *Phocoena phocoena*. - Abstract book 24th conference of the European Cetacean Society. Marine mammal populations: Challenges for conservation in the next decade. 22nd-24th March 2010, Stralsund/Germany: 226. Deutsches Meeresmuseum, Stralsund / European Cetacean Society. Jansen, O.E., M.F. Leopold, E.H.W.G. Meesters & C. Smeenk. Are white-beaked dolphins *Lagenorhynchus albirostris* food specialists? Their diet in the southern North Sea. - Journal of the Marine Biological Association of the United Kingdom, 90: 1501-1508. Murphy, S., G.J. Pierce, R.J. Law, P. Bersuder, P.D. Jepson, J.A. Learmonth, M. Addink, W. Dabin, M.B. Santos, R. Deaville, B.N. Zegers, A. Mets, E. Rogan, V. Ridoux, R.J. Reid, C. Smeenk, T. Jauniaux, A. López, J.M. Alonso Farré, A.F. González, A. Guerra, M. García-Hartmann,C. Lockyer & J.P. Boon. Assessing the effect of persistent organic pollutants on reproductive activity in common dolphins and harbour porpoises. – Journal of Northwest Atlantic Fisheries Science, 42: 153-173. Smeenk, C. Foreword: viii-ix. In: N. Redman. Whales’ bones of the Netherlands and Belgium. - Redman Publishing, Teddington. 2012 Smeenk, C. Book review. The harbour porpoise in the Netherlands: will it get the care it deserves? An urgent conservation plan. - Lutra, 55: 66-72. 2016 Camphuysen, C.J. & C. Smeenk. Noordkaper *Eubalaena glacialis*: 302-303. In: S. Broekhuizen, K. Spoelstra, J.B.M. Thissen, K.J. Canters & J.C. Buys (red.). Atlas van de Nederlandse zoogdieren. - *Natuur van Nederland *12. Naturalis Biodiversity Center / EIS Kenniscentrum Insecten en andere Ongewervelden, Leiden. Camphuysen, C.J. & C. Smeenk. Dwergvinvis *Balaenoptera acutorostrata*: 305-307. - Ibidem. Camphuysen, C.J. & C. Smeenk. Gewone vinvis *Balaenoptera physalus*: 312-314. - Ibidem. Camphuysen, C.J. & C. Smeenk. Bultrug *Megaptera novaeangliae*: 315-317. - Ibidem. Camphuysen, C.J. & C. Smeenk. Witsnuitdolfijn *Lagenorhynchus albirostris*: 337-342. - Ibidem. Camphuysen, C.J. & C. Smeenk. Tuimelaar *Tursiops truncatus*: 356-361. - Ibidem. Camphuysen, C.J. & C. Smeenk. Bruinvis *Phocoena phocoena*: 368-374. - Ibidem. Smeenk, C. Pottwalstrandungen - was wir wissen und nicht wissen. - Fluke, Wal-Magazin Für Historiker und Sammler, 29 (1): 10-13. Smeenk, C. Der rätselhafte Pottwal von Scheveningen. – Ibidem: 30-33. Smeenk, C. & C.J. Camphuysen. Grijze walvis *Eschrichtius robustus*: 304 - Ibidem. Smeenk, C. & C.J. Camphuysen. Noordse vinvis *Balaenoptera borealis*: 308-309 - Ibidem. Smeenk, C. & C.J. Camphuysen. Blauwe vinvis *Balaenoptera musculus*: 310-311. - Ibidem. Smeenk, C. & C.J. Camphuysen. Potvis *Physeter macrocephalus*: 318-323. - Ibidem. Smeenk, C. & C.J. Camphuysen. Dwergpotvis *Kogia breviceps*: 324. - Ibidem. Smeenk, C. & C.J. Camphuysen. Spitssnuitdolfijnen (Ziphiidae): 325. - Ibidem. Smeenk, C. & C.J. Camphuysen. Dolfijn van Cuvier *Ziphius cavirostris*: 326. - Ibidem. Smeenk, C. & C.J. Camphuysen. Butskop *Hyperoodon ampullatus*: 327-329. - Ibidem. Smeenk, C. & C.J. Camphuysen. Spitssnuitdolfijn van Gray *Mesoplodon grayi*: 330. - Ibidem. Smeenk, C. & C.J. Camphuysen. Gewone spitssnuitdolfijn *Mesoplodon bidens*: 331-332. - Ibidem. Smeenk, C. & C.J. Camphuysen. Spitssnuitdolfijn van Blainville *Mesoplodon densirostris*: 333. - Ibidem. Smeenk, C. & C.J. Camphuysen. Narwal *Monodon monoceros*: 334. - Ibidem. Smeenk, C. & C.J. Camphuysen. Beloega *Delphinapterus leucas*: 335-336. - Ibidem. Smeenk, C. & C.J. Camphuysen. Witflankdolfijn *Leucopleurus acutus*: 343-344. - Ibidem. Smeenk, C. & C.J. Camphuysen. Orka *Orcinus orca*: 345-347. - Ibidem. Smeenk, C. & C.J. Camphuysen. Gewone dolfijn *Delphinus delphis*: 348-351. - Ibidem. Smeenk, C. & C.J. Camphuysen. Gestreepte dolfijn *Stenella coeruleoalba*: 352-353. - Ibidem. Smeenk, C. & C.J. Camphuysen. Snaveldolfijn *Steno bredanensis*: 354-355. - Ibidem. Smeenk, C. & C.J. Camphuysen. Griend *Globicephala melas*: 362-364. - Ibidem. Smeenk, C. & C.J. Camphuysen. Gramper *Grampus griseus*: 365-366. - Ibidem. Smeenk, C. & C.J. Camphuysen. Zwarte zwaardwalvis *Pseudorca crassidens*: 367. - Ibidem.