Dear MARMAM readers, In memory of the late Chris Smeenk who for many years was curator of mammals and strandings coordinator at Rijksmuseum van Natuurlijke Historie (RMNH) in Leiden, The Netherlands, we have produced a special issue of the Dutch mammal journal Lutra, on North Sea cetaceans. The issue contains the following contributions: CONTENTS Evans, P.G.H., Kinze, C.C. & Pierce, G.J. Preface. Lutra 61(1): 1. Evans, P.G.H. North Sea cetacean research since the 19690s: advances and gaps.Lutra 61(1): 3-13. Brekhuizen, S., Camphuysen, K., Hoekstra, B., & van Laar, V. Chris Smeenk 1942-2017. Lutra 61(1): 15-28. Smeenk, C. & Evans, P.G.H. Review of sperm whale (Physeter macrocephalus)strandings around the North Sea. Lutra 61(1): 29-70. Pierce, G.J., Ward, N., Brownlow, A., and Santos, M.B. Analysis of historical and recent diet and strandings of sperm whales (Physeter microcephalus) in the North Sea. Lutra 61(1): 71-86. Kinze, C.C., Thøstesen, C.B., & Olsen, M.T. Cetacean stranding records along the Danish coastline: records for the period 2008-2017 and a comparative review. Lutra 61(1): 87-105. Haelters, J., Kerckhof, F., & Jauniaux, T. Strandings of cetaceans in Belgium from 1995 to 2017. Lutra 61(1): 107-126. Geelhoed, S.C.V. & Scheidat, M. Abundance of harbour porpoises (Phocoena phocoena) on the Dutch continental shelf, aerial surveys 2012-2017. Lutra 61(1): 127-136. Weel, S.M.H., Geelhoed, S., Tulp, I., & Scheidat, M. Feeding behaviour of harbour porpoises (Phocoena phocoena) in the Elms estuary. Lutra 61(1): 137-152. IJsseldijk, L.L., Brownlow, A., Davison, N.J., Deaville, R., Haelters, J., Keijl, G., Siebert, U., & ten Doeschate, M.T.I. Spatiotemporal trends in white-beaked dolphin strandings along the North Sea coast from 1991-2017. Lutra 61(1): 153-163. Leopold, M., Rotshuizen, E., & Evans, P.G.H. From nought to 100 in no time: how humpback whales (Megaptera novaeangliae) came into the southern North Sea. Lutra 61(1): 165-188. Kinze, C.C. A case for Tursiops tursio(Gunnerus, 1768). Lutra 61(1): 189-195. Smeenk, C.C. A chronological review of the nomenclature of Delphinus rostratusShaw, 1801 and Delphinus bredanesis(Lesson, 1828). Lutra 61(1): 197-214. For anyone interested in any of these papers, please contact the lead authors or myself. kind regards, Peter G.H. Evans <peter.evans@bangor.ac.uk> Mae croeso i chi gysylltu gyda'r Brifysgol yn Gymraeg neu Saesneg You are welcome to contact the University in Welsh or English Rhif Elusen Gofrestredig 1141565 - Registered Charity No. 1141565 Gall y neges e-bost hon, ac unrhyw atodiadau a anfonwyd gyda hi, gynnwys deunydd cyfrinachol ac wedi eu bwriadu i'w defnyddio'n unig gan y sawl y cawsant eu cyfeirio ato (atynt). Os ydych wedi derbyn y neges e-bost hon trwy gamgymeriad, rhowch wybod i'r anfonwr ar unwaith a dilewch y neges. Os na fwriadwyd anfon y neges atoch chi, rhaid i chi beidio a defnyddio, cadw neu ddatgelu unrhyw wybodaeth a gynhwysir ynddi. Mae unrhyw farn neu safbwynt yn eiddo i'r sawl a'i hanfonodd yn unig ac nid yw o anghenraid yn cynrychioli barn Prifysgol Bangor. Nid yw Prifysgol Bangor yn gwarantu bod y neges e-bost hon neu unrhyw atodiadau yn rhydd rhag firysau neu 100% yn ddiogel. Oni bai fod hyn wedi ei ddatgan yn uniongyrchol yn nhestun yr e-bost, nid bwriad y neges e-bost hon yw ffurfio contract rhwymol - mae rhestr o lofnodwyr awdurdodedig ar gael o Swyddfa Cyllid Prifysgol Bangor. This email and any attachments may contain confidential material and is solely for the use of the intended recipient(s). If you have received this email in error, please notify the sender immediately and delete this email. If you are not the intended recipient(s), you must not use, retain or disclose any information contained in this email. Any views or opinions are solely those of the sender and do not necessarily represent those of Bangor University. Bangor University does not guarantee that this email or any attachments are free from viruses or 100% secure. Unless expressly stated in the body of the text of the email, this email is not intended to form a binding contract - a list of authorised signatories is available from the Bangor University Finance Office.