Dr. Kristina Lehnert-Publications

Publications, reports and presentations (updated: 11.03.2025)

Publications

Heße, E., Boyi, J.O., Das, K. Jung, K., Lehnert, K., Piette, M., Pinzone, M., Schückel, S., Schückel, U., Siebert, U., Gilles, A. (2025). A multi-method approach reveals long- and short-term dietary differences in individual harbour porpoises Phocoena phocoena in the southern North Sea. Marine Ecology Progress Series 755: 115-132. doi.org/10.3354/meps14787

Preuss, A., Büscher, T.H., Herzog, H., Wohlsein, P., Lehnert, K. & Gorb, S.N. (2024). Attachment performance of the ectoparasitic seal louse Echinophthirius horridus. Communications Biology. doi.org/10.1038/s42003-023-05722-0

Herzog, I.; Preuss, A.; Wohlsein, P.; Siebert, U.; Gorb, S.; Lehnert, K. “Seal Louse and Heartworm: Time Trends and Impact on Harbour Seals in the North and Baltic Sea. 30th Annual Meeting of the German Society for Parasitology 15–17 March 2023, Giessen

Herzog, I., Wohlsein, P., Preuss, A., Gorb, S.N., Pigeault, R., Ewers, C., Prenger-Berninghoff, E., Siebert, U., & Lehnert, K. (2023). Heartworm and seal louse: Trends in prevalence, characterisation of impact and transmission pathways in a unique parasite assembly on seals in the North and Baltic Sea. International Journal for Parasitology: Parasites and Wildlife, doi.org/10.1016/j.ijppaw.2023.100898

Boyi, J. O., Sonne, C., Dietz, R., Rigét, F., Siebert, U. & Lehnert, K (2023). Gene expression and trace elements in Greenlandic ringed seals (Pusa hispida), Environmental Research, in press,117839, doi.org/10.1016/j.envres.2023.117839

Lehnert, K., Herzog, I., Ometere Boyi, J., Groß, S., Wohlsein, P., Ewers, C., Prenger-Berninghoff, E., Siebert, U (2023). Heartworms in Halichoerus grypus: First records of Acanthocheilonema spirocauda (Onchocercidae; Filarioidea) in 2 grey seals from the North Sea. Parasitology, 150(9), 781-785. doi:10.1017/S0031182023000501

Lehnert, K., Boyi, J. O., & Siebert, U. (2023). Potential New Species of Pseudaliid Lung Nematode (Metastrongyloidea) from Two Stranded Neonatal Orcas (Orcinus Orca) Characterized by ITS-2 and COI Sequences. Ecology and evolution, 13(5), e10036, doi.org/10.1002/ece3.10036

Rohner, S., Boyi, J.O., Artemeva, V., Zinke, O., Kiendl, A., Siebert, U., & Lehnert, K. (2023). Back from Exile? First Records of Chewing Lice (Lutridia exilis; Ischnocera; Mallophaga) in Growing Eurasian Otter (Lutra lutra) Populations from Northern Germany. Pathogens, 12, 587, doi.org/10.3390/ pathogens12040587

Siebert, U., Grilo, M. L., Kesselring, T., Lehnert, K., Ronnenberg, K., Pawliczka, I., Galatius, A., Kyhn, L. A., Dähne, M., & Gilles, A. (2022). Variation of blubber thickness for three marine mammal species in the southern Baltic Sea. Frontiers in Physiology. 13, 2399, doi.org/10.3389/fphys.2022.880465

Boyi, J. O., Heße, E., Rohner, S., Siebert, U., Gilles, A., & Lehnert, K. (2022). Deciphering Eurasian otter (Lutra lutra L.) and seal (Phoca vitulina L.; Halichoerus grypus F.) diet: metabarcoding tailored for fresh and saltwater fish species. Molecular Ecology, 31(19), 5089-5106, doi.org/10.1111/mec.16635

Boyi, J. O., Stokholm, I., Hillmann, M., Søndergaard, J., Persson, S., de Wit, C. A., Siebert, U., & Lehnert, K. (2022). Relationships between gene transcription and contaminant concentrations in Baltic ringed seals: a comparison between tissue matrices. Aquatic Toxicology, 242, 106035, doi.org/10.1016/j.aquatox.2021.106035

Lehnert, K., IJsseldijk, L. L., Uy, M. L., Boyi, J. O., van Schalkwijk, L., Tollenaar, E. A., .Gröne, A., Wohlsein, P., & Siebert, U. (2021). Whale lice (Isocyamus deltobranchium & Isocyamus delphinii; Cyamidae) prevalence in odontocetes off the German and Dutch coasts–morphological and molecular characterization and health implications. International Journal for Parasitology: Parasites and Wildlife, 15, 22-30, doi.org/10.1016/j.ijppaw.2021.02.015

Khairy, M., Brault, E., Dickhut, R., Harding, K. C., Harkonen, T., Karlsson, O., Lehnert, K., Teilmann, J., & Lohmann, R. (2021). Bioaccumulation of PCBs, OCPs and PBDEs in Marine Mammals From West Antarctica. Frontiers in Marine Science, 8, 768715, doi.org/10.3389/fmars.2021.768715

Gismondi, E., Daneels, L., Damseaux, F., Lehnert, K., Siebert, U., & Das, K. (2021). Preliminary study of oxidative stress biomarkers and trace elements in North Sea harbour seals. Marine Pollution Bulletin, 163, 111905, doi.org/10.1016/j.marpolbul.2020.111905

Bethune, E., Schulz-Kornas, E., Lehnert, K., Siebert, U., & Kaiser, T. M. (2021). Tooth Microwear Texture in the Eastern Atlantic Harbour Seals (Phoca vitulina vitulina) of the German Wadden Sea and Its Implications for Long Term Dietary and Ecosystem Changes. Frontiers in Ecology and Evolution, 205, doi.org/10.3389/fevo.2021.644019

Reckendorf, A., Everaarts, E., Bunskoek, P., Haulena, M., Springer, A., Lehnert, K., Lakemeyer, J., Siebert, U., & Strube, C. (2021). Lungworm infections in harbour porpoises (Phocoena phocoena) in the German Wadden Sea between 2006 and 2018, and serodiagnostic tests. International Journal for Parasitology: Parasites and Wildlife, 14, 53-61, doi.org/10.1016/j.ijppaw.2021.01.001

Shanebeck, K. M., Lakemeyer, J., Siebert, U., & Lehnert, K. (2020). Habitat selection and populations of Corynosoma (Acanthocephala) in the intestines of sea otters (Enhydra lutris) and seals. Journal of Helminthology, 94, e211, doi.org/10.1017/S0022149X20000747

Shanebeck, K. M., Lakemeyer, J., Siebert, U., & Lehnert, K. (2020). Novel infections of Corynosoma enhydri and Profilicollis sp. (Acanthocephala: Polymorphidae) identified in sea otters Enhydra lutris. Diseases of Aquatic Organisms, 137(3), 239-246, doi.org/10.3354/dao03442

Siebert , U., Pawliczka, I., Benke, H., von Vietinghoff, V., Wolf, P., Pilāts, V., Kesselring, T., Lehnert, K., Prenger-Berninghoff, E., Galatius, A., Anker Kyhn, L., Teilmann, J., Hansen, M. S., Sonne, C. P., & Wohlsein, P. (2020). Health assessment of harbour porpoises (Phocoena phocoena) from Baltic area of Denmark, Germany, Poland and Latvia. Environment International, 143,105904, doi.org/10.1016/j.envint.2020.105904

Ludes-Wehrmeister, E., Wohlsein, P., Prenger-Berninghoff, E., Ewers, C., Woelfing, B., Lehnert, K., & Siebert, U. (2020). Intestinal displacements in older harbour and grey seals
In: Diseases of Aquatic Organisms, 138, 215–225, doi.org/10.3354/dao03455

Sonne, C., Siebert, U., Gonnsen, K., Desforges, J. P., Eulaers, I., Persson, S., Roos, A., Bäcklin, B.-M., Kauhala, K., Olsen, M. T., Harding, K. C., Treu, G., Galatius, A., Andersen-Ranberg, E., Gross, S., Lakemeyer, J., Lehnert, K., Lam, S. S., Peng, W., & Dietz, R. (2020). Health effects from contaminant exposure in Baltic Sea birds and marine mammals: A review. Environment International, 139, 105725, doi.org/10.1016/j.envint.2020.105725

Sonne, C., Lakemeyer, J., Desforges, J. P., Eulaers, I., Persson, S., Stokholm, I., Galatius, A., Gross, S., Gonnsen, K., Lehnert, K., Andersen-Ranberg, E. U., Olsen, M. T., Dietz, R., & Siebert, U. (2020). A review of pathogens in selected Baltic Sea indicator species. Environment International, 137, 105565, doi.org/10.1016/j.envint.2020.105565

Lakemeyer. J., Siebert, U., Abdulmawjood, A., Ryeng, K. A., IJsseldijk, L., & Lehnert, K. (2020). Anisakid nematode species identification in harbour porpoises (Phocoena phocoena) from the North Sea, Baltic Sea and North Atlantic using RFLP analysis. International Journal for Parasitology: Parasites and Wildlife, 12, 93-98, doi.org/10.1016/j.ijppaw.2020.05.004

Schick, L.A., IJsseldijk, L.l., Grilo, M., Lakemeyer, J., Lehnert, K., Wohlsein, P., Ewers, C., Prenger-Berninghoff, E., Baumgärtner, W., Gröne, A., Kik, M., & Siebert, U. (2020). Pathological Findings in White-Beaked Dolphins (Lagenorhynchus albirostris) and Atlantic White-Sided Dolphins (Lagenorhynchus acutus) from the South-eastern North Sea. Frontiers in Veterinary Sciences, 7, 262, doi.org/10.3389/fvets.2020.00262

Lakemeyer, J., Lehnert, K., Woelfing, B., Pawliczka, I., Silts, M., Dähne, M., von Vietinghoff, V., Wohlsein, P., & Siebert, U. (2020). Pathological findings in North Sea and Baltic grey seal and harbour seal intestines associated with acanthocephalan infections
In: Diseases of Aquatic Organisms, 138, 97-110, doi.org/10.3354/dao03440

Lehnert, K., Siebert, U., Reißmann, K., Bruhn, R., McLachlan, M. S., Müller, G., van Elk, C. E., Ciurkiewicz, M., Baumgärtner, Beineke, A. (2019). Cytokine expression and lymphocyte proliferative capacity in diseased harbor porpoises (Phocoena phocoena)–Biomarkers for health assessment in wildlife cetaceans. Environmental Pollution, 247, 783-791, doi: 10.1016/j.envpol.2019.01.079

Lehnert, K., Poulin, R., & Presswell, B. (2019). Checklist of marine mammal parasites in New Zealand and Australian waters. Journal of Helminthology 93(6), 649-676, doi.org/10.1017/S0022149X19000361

Reckendorf, A., Wohlsein, P., Lakemeyer, J., Stokholm, I., von Vietinghoff, V., & Lehnert, K. (2019). There and back again – The return of the nasal mite Halarachne halichoeri to seals in German waters. International Journal for Parasitology: Parasites and Wildlife, 9, 112-118, doi.org/10.1016/j.ijppaw.2019.04.003

IJsseldijk, L. L., van Neer, A., Deaville, R., Begeman, L., van de Bildt, M., van den Brand, J. M. A., Brownlow, A., Czeck, R., Dabin, W., ten Doeschate, M., Herder, V., Herr, H., Ijzer, J., Jauniaux, T., Jensen, L. F., Jepson, P. D., Jo, W. K., Lakemeyer, J., Lehnert, K., Leopold, M. F., Osterhaus, A., Perkins, M. W., Piatkowski, U., Prenger-Berninghoff, E., Pund, R., Wohlsein, P., Gröne, A., & Siebert, U. (2018). Beached bachelors: An extensive study on the largest recorded sperm whale Physeter macrocephalus mortality event in the North Sea. PLoS One, 13(8), e0201221, doi.org/10.1371/journal.pone.0201221

de La Vega, C., Lebreton, B., Lehnert, K., Asmus, R., Siebert, U., & Asmus, H. (2018). Stable isotope composition and parasitic infections of harbor seal young‐of‐the‐year used as prey‐based diet indicators. Marine Mammal Science, 34(1), 7-26, doi: 10.1111/mms.12433

Reckendorf, A., Ludes-Wehrmeister, E., Wohlsein, P., Tiedemann, R., Siebert, U., & Lehnert, K. (2018). First record of Halocercus sp. (Pseudaliidae) lungworm infections in two stranded neonatal orcas (Orcinus orca). Parasitology, 145(12), 1553-1557, doi.org/10.1017/S0031182018000586

Grilo, M. L., Gomes, L., Wohlsein, P., de Carvalho, L. M., Siebert, U., & Lehnert, K. (2018). Cryptosporidium species and Giardia species prevalence in marine mammal species present in the German North and Baltic Seas. Journal of Zoo and Wildlife Medicine, 49(4), 1002-1006, doi.org/10.1638/2017-0255.1

Waindok, P.; Lehnert, K.; Siebert, U.; Pawliczka, I.; Strube, C. (2018). Prevalence and molecular characterisation of Acanthocephala in pinnipedia of the North and Baltic Seas. International Journal for Parasitology: Parasites and Wildlife, 7, 34-43, doi.org/10.1016/j.ijppaw.2018.01.002

Andersen‑ Ranberg, E., Lehnert, K., Leifsson. P. S., Dietz, R., Andersen, S., Siebert, U., Measures, L. & Sonne, C. (2018). Morphometric, molecular and histopathologic description of hepatic infection by Orthosplanchnus arcticus (Trematoda: Digenea: Brachycladiidae) in ringed seals (Pusa hispida) from Northwest Greenland. Polar Biology, 41(5), 1019-1025, doi.org/10.1007/s00300-017-2245-6

Morell, M., Lehnert, K., IJsseldijk, L. L., Raverty, S. A., Wohlsein, P., Gröne, A., André, M., Siebert, U., & Shadwick, R. E. (2017). Parasites in the inner ear of harbour porpoise: cases from the North and Baltic Seas. Diseases of Aquatic Organisms, 127, 57–63, doi.org/10.3354/dao03178

Lehnert, K., Randhawa, H., & Poulin, R. (2017). Metazoan parasites from odontocetes off New Zealand: new records. Parasitology Research, 116, 2861-2868, doi: 10.1007/s00436-017-5573-0

Lehnert, K., Weirup, L., Harding, K.C., Härkönen, T., Karlsson, O., & Teilmann, J. (2017). Antarctic seals: Molecular biomarkers as indicators for pollutant exposure, health effects and diet. Science of The Total Environment, 599, 1693-1704, doi.org/10.1016/j.scitotenv.2017.04.224

Jo, W. K., Grilo, M. L., Wohlsein, P., Andersen-Ranberg, E. U., Hansen, M. S., Kinze, C. C., Hjulsager, C. K., Olsen, M. T., Lehnert, K., Prenger-Berninghoff, E., Siebert, U., Osterhaus, A., Baumgärtner, W., Jensen, L. F., & van der Vries, E. (2016). Dolphin Morbillivirus in a Fin Whale (Balaenoptera physalus) in Denmark. Journal of Wildlife Diseases, 53(4), 921-924, doi.org/10.7589/2016-11-246

Fraija-Fernández, N., Fernández, M., Lehnert, K., Raga, J. A., Siebert, U., & Aznar, F. J. (2017). Long-distance travellers: phylogeography of a generalist parasite, Pholeter gastrophilus, from cetaceans. PloS ONE, 12(1), e0170184, doi.org/10.1371/journal.pone.0170184

van den Brand, J. M., Wohlsein, P., Herfst, S., Bodewes, R., Pfankuche, V. M., van de Bildt, M. W., Seehusen, F., Puff, C., Richard, M., Siebert, U., Lehnert, K., Bestebroer, T., Lexmond, P.,. Fouchier, R. A. M, Prenger-Berninghoff, E., Herbst, W., Koopmans, M., Osterhaus, A. D. M. E., Kuiken, T., & Baumgärtner, W. (2016). Influenza A (H10N7) Virus Causes Respiratory Tract Disease in Harbor Seals and Ferrets. PLoS ONE 11(7), e0159625, doi.org/10.1371/journal.pone.0159625

Ulrich, S.A., Lehnert, K., Rubio-Garcia, A., Sanchez-Contreras, G.J., Strube, C., & Siebert, U. (2016). Lungworm seroprevalence in free-ranging harbour seals and molecular characterisation of marine mammal MSP. International Journal for Parasitology: Parasites and Wildlife, 5(1), 48-55, doi.org/10.1016/j.ijppaw.2016.02.001

Ulrich, S. A., Lehnert, K., Siebert, U., & Strube, C. (2015). A recombinant antigen-based enzyme-linked immunosorbent assay (ELISA) for lungworm detection in seals. Parasites & Vectors, 8(1), 1-8, doi:10.1186/s13071-015-1054-4

Lehnert, K., Ronnenberg, K., Weijs, L., Covaci, A., Das, K., Hellwig, V., & Siebert, U. (2016). Xenobiotic and Immune-Relevant Molecular Biomarkers in Harbor Seals as Proxies for Pollutant Burden and Effects. Archives of Environmental Contamination and Toxicology, 70(1), 106-120, doi:10.1007/s00244-015-0202-

Lehnert, K., Schwanke, E., Hahn, K., Wohlsein, P., & Siebert, U. (2016). Heartworm (Acanthocheilonema spirocauda) and seal louse (Echinophthirius horridus) infections in harbour seals (Phoca vitulina) from the North and Baltic Seas. Journal of Sea Research, 113, 65-72, doi.org/10.1016/j.seares.2015.06.014

Lehnert, K., Müller, S., Weirup, L., Ronnenberg, K., Pawliczka, I., Rosenberger, T., Siebert, U. (2014). Molecular biomarkers in grey seals (Halichoerus grypus) to evaluate pollutant exposure, health and immune status. Marine Pollution Bulletin, 88(1-2), 311-318, doi.org/10.1016/j.marpolbul.2014.08.025

Hammond, P. S., Macleod, K., Berggren, P., Borchers, D. L., Burt, L., Cañadas, A., ... Lehnert, K., …& Vázquez, J. A. (2014). Large scale surveys for cetaceans: line transect assumptions, reliability of abundance estimates and improving survey efficiency – a response to MacLeod. Biological Conservation, 170, 338-339, doi.org/10.1016/j.biocon.2014.01.016

Lehnert, K., Seibel, H., Hasselmeier, I., Wohlsein, P., Iversen, M., Heide-Jørgensen, M. P., & Siebert, U. (2014). Increase in parasite burden and associated pathology in harbour porpoises (Phocoena phocoena) in West Greenland. Polar Biology 37(3), 321-331, doi:10.1007/s00300-013-1433-2

Hammond, P. S., Macleod, K., Berggren, P., Borchers, D. L., Burt, L., Cañadas, A., ... Lehnert, K., …& Vázquez, J. A. (2013). Cetacean abundance and distribution in European Atlantic shelf waters to inform conservation and management. Biological Conservation, 164, 107-122, doi.org/10.1016/j.biocon.2013.04.010

Weirup, L.; Müller, S.; Ronnenberg, K.; Rosenberger, T.; Siebert, U. ; & Lehnert, K. (2013). Immune-relevant and new xenobiotic molecular biomarkers to assess anthropogenic stress in seals. Marine Environmental Research, 92, 43-51, doi.org/10.1016/j.marenvres.2013.08.010

Müller, S., Lehnert, K., Seibel, H., Driver, J., Ronnenberg, K., Teilmann, J., van Elk,C., Kristensen, J., Everaarts, E., & Siebert, U. (2013). Evaluation of immune and stress status in harbour porpoises (Phocoena phocoena): can hormones and mRNA expression levels serve as indicators to assess stress? BMC Veterinary Research, 9(1), 145, doi.org/10.1186/1746-6148-9-145

Lehnert, K., von Samson-Himmelstjerna, G., Schaudien, D., Bleidorn, C., Wohlsein, P., & Siebert, U. (2010). Transmission of lungworms of harbour porpoises and harbour seals: Molecular tools determine potential vertebrate intermediate hosts. International Journal for Parasitology 40, 845-853, doi.org/10.1016/j.ijpara.2009.12.008

Herr, H., Scheidat, M., Lehnert, K., & Siebert, U. (2009). Seals at sea: modelling seal distribution in the German Bight based on aerial survey data. Marine Biology156, 811–820, DOI 10.1007/s00227-008-1105-x

Lehnert, K., Raga, J. A., & Siebert, U. (2007). Parasites in harbour seals (Phoca vitulina) from the German Wadden Sea between two Phocine Distemper Virus epidemics. Helgoland Marine Research 61, 239-245, DOI 10.1007/s10152-007-0072-9

Siebert, U., Wohlsein, P., Lehnert, K., & Baumgärtner W (2007). Pathological findings in harbour seals (Phoca vitulina) around the second Phocine Distemper Virus die-off in 2002. Journal of Comparative Pathology, 137, 47-58, doi.org/10.1016/j.jcpa.2007.04.018

Lehnert, K., Fonfara, S., Wohlsein, P., & Siebert, U. (2007). Isocyamus delphinii: First record of whale-lice on a harbour porpoise (Phocoena phocoena) from German waters. Veterinary Record 161, 526-528, doi.org/10.1136/vr.161.15.526

Siebert, U., Tolley, K., Víkingsson, G., Ólafsdottir, D., Lehnert, K., Weiss, R., & Baumgärtner, W. (2006). Pathological findings in harbour porpoises (Phocoena phocoena) from Norwegian and Icelandic waters. Journal of Comparative Pathology, 134, 134-142, doi.org/10.1016/j.jcpa.2005.09.002

Lehnert, K., Raga, J.A., & Siebert, U. (2005). Macroparasites in Harbour Porpoises (Phocoena phocoena) from German and Norwegian waters. Diseases of Aquatic Organisms, 64, 265-269, 10.3354/dao064265

Book chapters

Lehnert, K., Desforges, J. P., Das, K., & Siebert, U. (2018). Ecological biomarkers and accumulation of contaminants in pinnipeds In: Fossi, M. C.; Panti, C.: Marine mammal ecotoxicology: impacts of multiple stressors on population health. ELSEVIER, pp. 261-291, doi.org/10.1016/B978-0-12-812144-3.00010-3

Gilles, A., Herr, H., Lehnert, K., Scheidat, M., & Siebert, U. (2008). Harbour porpoises – abundance estimates and seasonal distribution patterns. In: Wollny-Goerke, K. and Eskildsen, K. (Eds.) Marine mammals and seabirds in front of offshore wind energy. Teubner, Wiesbaden, pp. 19-36.

Presentations

I. Herzog, U. Siebert, P. Wohlsein, K. Lehnert: From nose to nose: Prevalence, lifecycle, and health impact of Halarachne halichoeri in grey seals of the North and Baltic Sea. Joint Parasitology Spring Meeting, 11.–14. März 2025, Julius-Maximilians-Universität Würzburg

K. Lehnert, J. F. Escobar Calderon, I. Herzog , A. Öztürk, P. Wohlsein, U. Siebert: Three decades of anisakid nematode infections in harbour porpoises of the North- and Baltic Sea: Trends and health effects. Joint Parasitology Spring Meeting, 11.–14. März 2025, Julius-Maximilians-Universität Würzburg

LEHNERT, K.; Herzog, I.; Escobar Calderon, J.; Siebert, U., 2024. Three decades of anisakid nematode infections in harbour porpoises of the North- and Baltic Sea: trends and health effects. One Health EWDA 2024, Stralsund, Germany, 9.-13. September 2024.

Herzog, I.; Pigeault, R.; Wohlsein, P.; Siebert, U.; Lehnert, K. (2024): Can´t get them off their heads: Time trend and new sampling strategy for seal lice (Echinophthirius horridus) of seals in the North and Baltic Sea. Tagung der DVG-Fachgruppe “Parasitologie & parasitäre Erkrankungen”: Tagungsband Hannover, Germany, 08.-10.07.2024, S. 81, 1. Auflage, Gießen, ISBN 978-3-86345-721-1

Herzog, I.; Preuss, A.; Wohlsein, P.; Siebert, U.; Gorb, S.; Lehnert, K. “Seal Louse and Heartworm: Time Trends and Impact on Harbour Seals in the North and Baltic Sea.” 30th Annual Meeting of the German Society for Parasitology, 15–17 March 2023, Giessen

Herzog, I.; Wohlsein, P.; Preuss, A.; Siebert, U.; Gorb, S.; Lehnert, K. “SEAL LOUSE and HEARTWORM: A TIME-TESTED TEAM AND ITS IMPACT ON HARBOUR SEALS.” Zoo and Wildlife Health Conference, 7-10 June, 2023 - Valencia, Spain

Eileen Hesse, Joy Ometere Boyi, Krishna Das, Kristina Lehnert, Mathilde Piette, Marianna Pinzone, Ursula Siebert, Anita Gilles Titel: Hidden gems? A multi-method approach to study the diet of harbour porpoises (Phocoena phocoena) in the southern North Sea. Oral talk, 34^th Conference of the European Cetacean Society, (18-20 April 2023). abstract book page 44 https://www.thebdri.com/ecs2023abstractbook.pdf

Lehnert, K.; Herzog, I.; Wohlsein, P.; Preuss, A.; Siebert, U.; Gorb, S. 2023. “Arthropod Parasites of Marine Mammals: Convergent Physical Solutions for Living on Aquatic Hosts.” Poster, 34th ECS Conference, Galicia, O Grove, (18-20 April 2023) abstract book page 358 https://www.thebdri.com/ecs2023abstractbook.pdf

Joy Ometere Boyi, Christian Sonne, Jens Søndergaard, Sara Persson, Frank Riget, Cynthia A. de Wit, Ursula Siebert, Kristina Lehnert. Title: Contaminant Exposure and Gene Transcription in Baltic and Greenlandic Ringed Seal Tissues. Talk, SETAC North America 43rd Annual Meeting, virtual (13-17 November, 2022). Abstract book page 27- 28

Joy Ometere Boyi, Iben Stokholm, Miriam Hillmann, Jens Søndergaard, Sara Persson, Cynthia A. de Wit, Ursula Siebert, Kristina Lehnert. Title: Relationships between gene transcription and contaminant concentrations in Baltic ringed seals: a comparison between tissue matrices. Poster, 24th Biennial Conference on the Biology of Marine Mammals, virtual (August 1-5, 2022). Abstract book page 261

Eileen Heße, Joy Ometere Boyi, Kristina Lehnert, Ursula Siebert, Abbo van Neer & Anita Gilles Titel: Cracking code: using metabarcoding to analyze the diet of seals (Phoca vitulina; Halichoerus grypus) from the southern North Sea. Talk, 33rd Conference of the European Cetacean Society, virtual (5-7 April 2022). abstract book page 50
https://www.europeancetaceansociety.eu/sites/default/files/ECS2022_Abstract%20Book.pdf

Stephanie Gross, Ursula Siebert, Line Anker Kyhn, Charlotte Bie Thøstesen, Aage Kristian Olsen Alstrup, Marcus Fähndrich, Anders Galatius, Lonneke IJsseldijk, Trine Hammer Jensen, Tim Kåre Jensen, Jan Lakemeyer, Kristina Lehnert, Heidi Huus Petersen, Ralf Pund, Simon Rohner, Luca Aroha Schick, Andrea Gröne. 2021. “Trilateral Health Monitoring of Seals and Porpoises – What Have We Learned?”
Virtual 15th International Scientific Wadden Sea Symposium, 30. November to 02. December 2021, Büsum Germanyhttps://www.waddensea-worldheritage.org/ISWSS15

Lakemeyer, J., Lehnert, K., Woelfing, B., Pawliczka, I., Dähne, M., von Vietinghoff, V., Wohlsein, P., & Siebert, U. (2019). Pathological findings in North Sea and Baltic grey seal and harbour seal intestines associated with acanthocephalan infections. In Proceedings of the Zoo and Wildlife Health Conference 2019: June 12th - 15th, 2019, Kolmården / Sweden (p. 76). https://elib.tiho-hannover.de/receive/tiho_mods_00003312

Reckendorf, A.; Lehnert, K.: There and back again – the return of the nasal mite Halarachne halichoeri to seals in German waters.
Oral presentation, VW Symposium, 07. - 08. March 2019, Hamburg, Germany

Grilo, M.; Valente, S.; Rebelo, S.; Gomes, L.; Madeira de Carvalho, L.; Robalo, J.; Oliveira, M.; Siebert, U.; Lehnert, K.: Low prevalence of Cryptosporidium sp. and Giardia sp. in marine mammals present in German waters In: poster, abstract book
The 32nd Conference European Cetacean Society, La Spezia, Italy, 6th to 10th April, 2018, S. 159
http://www.europeancetaceansociety.eu/sites/default/files/27253%20ABSTRACT%20BOOK_LOW%20RES.pdf

Stokholm, I.; Härkonen, T.; Harding, K.; Siebert, U.; Lehnert, K.; Dietz, R.; Teilmann, J.; Galatius, A.; Worsøe Havmøller, L.; Carroll, E.; Hall, A.; Olsen, M.: Origin and spread of phocine distemper virus in 1988 and 2002
In: talk, abstract book
The 32nd Conference European Cetacean Society, La Spezia, Italy, 6th April to 10th April 2018, S. 67
http://http://www.europeancetaceansociety.eu/sites/default/files/27253%20ABSTRACT%20BOOK_LOW%20RES.pdf

Reckendorf, A.; Unger, B.; Piatkowski, U.; Lehnert, K.; Herder, V.; Wohlsein, P.; Siebert, U.: Post-mortem findings of 12 sperm whales (Physeter macrocephalus) stranded on the coast of Schleswig-Holstein, Germany, in early 2016 In: Czirják, G. A.; Prügel, J. (Hrsg.): Proceedings of the Zoo and Wildlife Health Conference 2017 Berlin, 24.-27.05.2017; Berlin: IZW, 2017, S. 63 ISSN 2510-4683

Lakemeyer, J.; Lehnert, K.; Pawliczka, I.; Silts, M., Dähne, M.; von Vietinghoff, V.; Wohlsein, P.; Siebert, U.: Pathological findings in intestines of grey seals (Halichoerus grypus)and harbour seals (Phoca vitulina) from the North and Baltic sea associated with acanthocephalosis In: Living along gradiants: past, present, future. Abstracts 11th Baltic Sea Science Congress, Rostock, 12.-16.06.2017; 2017, S. 145 http://www.io-warnemuende.de/tl_files/conference/bssc2017/bssc2017-abstract-book.pdf

Lakemeyer, J.; Lehnert, K.; Pawliczka, I.; Silts, M.; Dähne, M.; von Vietinghoff, V.; Wohlsein, P.; Siebert, U.: Pathological findings in intestines of Baltic grey seals (Halichoerus grypus) associated with acanthocephalan infections
In: talk/abstract book
22nd Biennial Society for Marine Mammalogy Conference on the Biology of Marine Mammals, Halifax, Canada, 22-27 October 2017, S. 44

Piatkowski, U.; Wohlsein, P.; van Neer, A.; Schnitzler, J.; Reckendorf, A.; Lehnert, K.; Lakemeyer, J.; Grilo, M.; Herr, H.; Unger, B.; Herder, V.; Siebert, U.: Studies on sperm whales (Physeter macrocephalus) stranded on the coast of Schleswig-Holstein, Germany in 2016
In: Poster, abstract book
31st Annual Conference of the European Cetacean Society, Middelfart, Denmark, 29. April-03. Mai, 2017, S. 270
http://europeancetaceansociety.eu/sites/default/files/AbstractBook_0.pdf

Stokholm, I.; Härkonen, T.; Harding, K.; Lehnert, K.; Siebert, U.; Dietz, R.; Teilmann, J.; Galatius, A.; Worsøe Havmøller, L.; Carroll, E.; Hall, A.; Tange Olsen, M.: Origin and spread of Phocine Distemper Virus (PDV) causing the 1988 and 2002 epidemics in harbour seals.
In: Poster, abstract book, 31st Annual Conference of the European Cetacean Society, Middelfart, Denmark, 29. April-03. Mai, 2017, S. 229
http://europeancetaceansociety.eu/sites/default/files/AbstractBook_0.pdf

Grilo, M.; Lehnert, K.; Gomes, L.; Madeira de Carvalho, L.; Siebert, U.: I’m in the scat, man! Preliminary investigation into the prevalence of enteric protozoans of marine mammal resident populations in German waters
In: Poster, abstract book, 31st Annual Conference of the European Cetacean Society, Middelfart, Denmark, 29. April-03. Mai, 2017, S. 204
http://europeancetaceansociety.eu/sites/default/files/ECS_full-program_opslag.pdf

Brennecke, D.; Knickmeier, K.; Siebert, U., Lehnert-Sobotta, K.; Reckendorf, A.; Sköld, H.; Lorenz, A.; Pawliczka vel Pawlik, I.; Jaszczoł t, J.; Koss, M.; Wahlberg, M.; Ł askawska-Wolszcza, M.; Gobert, S.; Das, K.; Parmentier, E.; Wollny-Goerke, K.; Essenberger, A.; Schöps, K.; Kruse, K.: EU-project: Marine mammals - using marine mammals for making science education and science careers attractive for young people'
In: poster, abstract book
31st Annual Conference of the European Cetacean Society , Middelfart, Denmark, 29. April-03. Mai, 2017, p. 166
http://europeancetaceansociety.eu/sites/default/files/AbstractBook_0.pdf

Lakemeyer, J.; Siebert, U.; Lehnert, K.: Anisakid nematode species identification in harbour porpoises (Phocoena phocoena) from the North Sea, Baltic Sea and North Atlantic via RFLP analysis
In: Poster, abstract book
31st Annual Conference of the European Cetacean Society , Middelfart, Denmark, 29. April-03. Mai, 2017, S. 121
http://europeancetaceansociety.eu/sites/default/files/AbstractBook_0.pdf

Siebert, U.; Lehnert, K.; Prenger-Berninghoff, E.; Wohlsein, P.: Infectious desease in marine mammals from the North and Baltic Seas
In: Abstractbook
Talk at the 65th Annual International Conference of the Wildlife Desease Association, New York, USA, 31 July 2016-05 August 2016, 2016, S. 17

Lehnert, K. Parasitological investigations on cetaceans along the German coast and adjacent waters In: Vortrag, Wildlife Medicine: Parasititc Diseases Workshop , Zagreb, Croatia, 13-15 Juni 2016

Lakemeyer, J.; Lehnert, K.; Pawliczka, I.; Wohlsein, P.; Siebert, U.: Pathological findings in intestines of grey seals (Halichoerus grypus) and harbour seals (Phoca vitulina) from the North and Baltic Sea associated with acanthocephalosis.
Poster abstractbook, 30TH Conference of the Euopean Cetacean Society, Funchal, Madeira, 14th to 16th March, 2016, p. 230

Reckendorf, A.; Siebert, U.; Wohlsein, P.; Lehnert, K.: First record of the nasal mite (Halarachne halichoeri) in a grey seal from the German Wadden Sea.
Poster abstractbook, 30TH Conference of the Euopean Cetacean Society, Funchal, Madeira, 14th to 16th March, 2016, S. 176

Reckendorf, A.; Siebert, U.; Wohlsein, P.; Lehnert, K.: First record of the nasal mite (Halarachne halichoeri) in a grey seal from the German Wadden Sea In: 12th Conference of the European Wildlife Disease Association (EWDA Berlin, 27.- 31.8.2016; 2016, S. 171 http://www.izw-berlin.de/tl_files/downloads/EWDA_2016/EWDA2016_Proceedings.pdf 16

Lehnert, K.; Weirup, L.; Härkönen, T.; Karlsson, O.; Hårding, K.; Teilmann, J.:Antarctic seals: Molecular biomarkers as indicators for diet, pollutant exposure and health effects.
Poster abstractbook, 30TH Conference of the Euopean Cetacean Society, Funchal, Madeira, 14th to 16th March, 2016, S. 130

Ulrich, S. A.; Janecek, E.; Lehnert, K.; Siebert, U.; Strube, C.: Lungworm seroprevalence and age distribution in free-ranging harbour seals of the North and Baltic Sea In: 27th Annual Meeting of the German Society for Parasitology: program Göttingen, Germany, 09.-12.03.2016; 2016, S. 139-140,P EPI 6

Lehnert, K.; Weirup, L.; Härkönen, T.; Karlsson, O.; Hårding, K.; Teilmann. S.: Antarctic seals: Molecular biomarkers as indicators for diet, pollutant exposure and health effects.
Talk at the 21st Biennial Conference of the Society for Marine Mammology, San Francisco, USA., 13-18 Dezember, 2015

Schwanke, E.; Lehnert, K.; Siebert, U.: Cestode infection and species identification using moleculartools in marine mammals from German waters (North and BalticSea). Poster at the 89th Annual Meeting of the German Society for Mammalian Biology, University of Veterinary Medicine, Hanover, Foundation, Germany, 13th–16th September, 2015, S. 20

Ulrich, S. A.; Janecek, E.; Lehnert, K.; Siebert, U.; Strube, C.: Antikörper gegen Lungenwürmer: Profile und Trends freilebender Seehunde in der Nordsee und Seeelefanten im Pazifik In: Deutsche Veterinärmedizinische Gesellschaft / Fachgruppe Parasitologie und Parasitäre Krankheiten (Hrsg.): Veterinärparasitologie heute: aktuelle Probleme, neue Forschungsergebnisse, Konsequenzen für die Praxis Tagung der DVG-Fachgruppe Parasitologie und Parasitäre Krankheiten, Stralsund, 29.06.-01.07.2015; Gießen: DVG Service, 2015, S. 3-4 ISBN 978-3-86345-261-

Waindok, P.; Lehnert, K.; Siebert, U.; Strube, C.: Prävalenz und Diversität von Acanthocephala-Arten in Pinnipedia der Nord- und Ostsee In: Deutsche Veterinärmedizinische Gesellschaft / Fachgruppe Parasitologie und Parasitäre Krankheiten (Hrsg.): Veterinärparasitologie heute: aktuelle Probleme, neue Forschungsergebnisse, Konsequenzen für die Praxis
Tagung der DVG-Fachgruppe Parasitologie und Parasitäre Krankheiten, Stralsund, 29.06.-01.07.2015 Gießen: DVG Service, 2015, S. 1-2

Lehnert, K.; Rademaker, M.; Weiss, R.; Wohlsein, P.; Prenger-Berninghoff, E.: Bacterial microbiota in harbour seals (Phoca vitulina) from the North and Baltic Seas of Schleswig-Holstein, Germany around devastating morbillivirus and influenza die-offs.In: oral abstract, 29TH CONFERENCE OF THE EUROPEAN CETACEAN SOCIETY, St Julian’s Bay, MALTA, 23rd to 25th March, 2015. pp.18

Lakemeyer, J.; Pawliczka, I.; Wohlsein, P.; Lehnert, K.; Siebert, U.:
Pathological findings in intestines of grey seals (Halichoerus grypus) and harbour seals (Phoca vitulina) from the North and Baltic Sea associated with acanthocephalosis
In: Mammalian biology 80 (Supplement) 89th Annual Meeting of the German Society for Mammalian Biology, Hannover,13.–16.09.2015; S. 16 ISSN 1616-5047
http://www.sciencedirect.com/science/article/pii/S1616504715000634

Andersen-Ranberg, E. U.; Lehnert, K.; Siebert, U.; Dietz, R.; Leifsson, P. S.; Andersen, S.; Sonne, C.: Morphometric and molecular identification of liver flukes found in West Greenland Ringed Seals (Pusa hispida) In: Mammalian biology 80 (Supplement) 89th Annual Meeting of the German Society for Mammalian Biology, Hannover, 13.09–16.09.2015; 2015, S. 11 ISSN 1616-5047 http://www.sciencedirect.com/science/article/pii/S1616504715000634

Ulrich, S. A.; Siebert, U.; Buschbaum, S.; Lehnert, K.; Strube, C.: Evaluierung eines ELISAs zur Detektion von Lungenwurminfektionen bei Seehunden In: Deutsche Veterinärmedizinische Gesellschaft / Fachgruppe Parasitologie und Parasitäre Krankheiten (Hrsg.): Veterinärparasitologie heute: aktuelle Probleme, neues Wissen, moderne Optionen Tagung der DVG-Fachgruppe Parasitologie und Parasitäre Krankheiten, Leipzig, 30.06.- 02.07.2014; Gießen: DVG Service, 2014, S. 9-11 ISBN 978-3-86345-209-

Lehnert, K., Ronnenberg, K., Covaci, A., Das, K., Siebert, U. (2014) Xenobiotic molecular biomarkers in harbour seals as proxies for pollutant burden and effects? Vortrag. 28th Annual Conference of the European Cetacean Society, 5-9 April 2014, Liege, Belgium

Schwanke, E., Ulrich, S.A., Siebert, U., Lehnert, K. (2014) Seal lice as vector for heartworm larvae: heartworm lifecycle and prevalence in harbour seals. Poster. 28th Annual Conference of the European Cetacean Society, 5-9 April 2014, Liege, Belgium

Ullrich, S.A., Strube, C., Buschbaum, S., Lehnert, K., Siebert, U. (2014) Serological lungworm detection in seals. Poster. 28th Annual Conference of the European Cetacean Society, 5-9 April 2014, Liege, Belgium

Lehnert, K.; Wohlsein, P.; Schwanke, E.; Waindok, P.; Strube, C.; Siebert, U.: Marine mammal parasites: indicators for health, anthropogenic stress and food web dynamics? In: Ecology & evolution of marine parasites & diseases: international symposium / NIOZ, Netherlands; abstracts of talks & posters presented during the symposium Texel, 10.- 14.03.2014; 2014, S. 45 http://wwz.ifremer.fr/sg2m/content/download/79412/1010455/file/Abstracts.pdf

Lehnert, K.; Müller, S.; Weirup, L.; Rosenberger, T.; Pawliczka, I.; Ronnenberger, K.; Siebert, U. (2013) New molecular biomarkers as indicators for anthropogenic stress in seals. Vortrag. 27th Annual Conference of the European Cetacean Society, 8-10 April 2013, Setúbal, Portugal

Lehnert, K., Seibel, H., Hasselmeier, I., Wohlsein, P., Iversen, M., Nielsen, N.H., Heide-Jørgensen, M.P., Prenger-Berninghoff, E., Siebert, U. (2012) Parasitism and associated pathology in harbour porpoises (Phocoena phocoena) from waters off Greenland in 2009. Abstracts of the European Cetacean Society, 26th Annual Conference, 26.-28.3.2012, Galway, Ireland

Lehnert, K.; Seibel, H.; Siebert, U.; Hellwig, V.: Establishing pollutant-induced biomarkers in harbour seal blood: mRNA expression levels of AHR, ARNT and PPAR alpha. Abstracts of the European Cetacean Society, 25th Annual Conference, 21.-23.3.2011, Cadiz, Spain

Siebert, U.; Seibel, H.; Lehnert, K.; Hasselmeier, I.; Mueller, S.; Prenger-Berninghoff, E.; Wohlsein, P.: Two decades of health assessment of harbour porpoises from the German North Sea In: European Cetacean Society (Hrsg.): Abstract book of the 25th Conference of the European Cetacean Society Cadiz, 21.- 23.3.2011; 2011, S. 88

Giewat, H.; Lehnert, K.; Maernoudt, G.; Wohlsein, P.; Siebert, U.: Experimental infection of turbots with seal lungworm larvae: molecular tools determine potential vertebrate intermediate host. Abstracts of the European Cetacean Society, 25th Annual Conference, 21.-23.3.2011, Cadiz, Spain

Korff, V., Behr, A., Wargel, A., Lehnert, K., Siebert, U., Hellwig, V. From Seals to Cells: Protein Biomarkers to reveal effects of Persistent Pollutants on Primary Hepatocytes of Phoca vitulina. ICES ASC Handbook of the Annual Science Conference, 20.-24.9.2010, Nantes, France.

Korff, V., Wargel, A., Lehnert, K., Siebert, U., Hellwig, V. Assessment of cell viability and specific metabolism in primary seal hepatocytes after exposure to PFOS and PCBs. Abstracts of the Society of Marine Mammalogy, 18^th Biennual Conference, 12.-16.10.2009, Quebec, Canada.

Lehnert, K.; von Samson-Himmelstjerna, G.; Wohlsein, P.; Schaudien, D.; Siebert, U. (2008). Lungworm transmission in porpoises and seals: molecular tools determine vertebrate intermediate hosts. ICES ASC Handbook of the Annual Science Conference, 22.-26. September 2008, Halifax, Nova, Scotia, Canada

Seibel, H.; Lehnert, K.; Wohlsein, P.; Baumgärtner, W.; Weiss, R.; Prenger-Berninghoff, E.; Siebert, U.: Infectious Diseases in marine mammals from the German North and Baltic Sea. ICES ASC Handbook of the Annual Science Conference, 22.-26. September 2008, Halifax, Nova, Scotia, Canada

Lehnert, K.; Samson-Himmelstjerna, G.; Fonfara, S.; Walter, T.; Siebert, U. (2007): Life cycle of Lungworms in Porpoises and seals: Molecular Tools determine vertebrate intermediate hosts. Abstracts of the European Cetacean Society, 21st Annual Conference, 22.-25.4.2007, Donostia/San Sebastian, Spain.

Lehnert, K.; von Samson-Himmelstjerna, G.; Fonfara, S.; Wohlsein, P.; Siebert, U. (2007): Lungworms in porpoises and seals do have vertebrate intermediate hosts: Molecular tools determine lifecycle. Abstracts of the World Association for the Advancement of Veterinary Parasitology, 21. Biennal International Conference, 19.-23. August 2007, Ghent, Belgium.

Lehnert, K.; von Samson-Himmelstjerna, G.; Wohlsein, P. & Siebert, U. (2007): Lungworm transmission in porpoises and seals: molecular tools determine vertebrate intermediate hosts. Abstracts of the Society of Marine Mammology, 17th Biennial conference, 29.11 -3.12.2007, Capetown, South Africa.

Lehnert, K.; Brasseur, S.; Jansen, O.; Siebert, U.; Reijnders, P. J. H. (2006): Gastrointestinal parasites in harbour seals (Phoca vitulina) found during the 2002 seal epizootic around Texel, Netherlands. Abstracts of the European Cetacean Society Conference in Gdansk, Poland 2006.

Lehnert, K.; Fonfara, S.; von Samson-Hjimmelstjerna, G.; Siebert, U. (2005). Stenurus minor: ITS-1 sequence in nematodes from the tympanic bullae of Harbour Porpoises (Phocoena phocoena). Proceedings of the European Cetacean Society Conference in La Rochelle, France 2005.

Lehnert, K.; Fonfara, S.; von Samson-Hjimmelstjerna, G.; Siebert, U. (2004) Molecular characterisation of lungworms from Harbour Porpoise (Phocoena phocoena) and Harbour Seal (Phoca vitulina) from German waters: first results. Abstracts of the European Cetacean Society Conference in Kolmarden, Sweden 2004.

Lehnert, K.; Raga, J. A.; Siebert, U. (2003). Parasitological findings in Harbour Seals (Phoca vitulina) and Grey Seals (Halichoerus grypus) stranded along the coasts of Schleswig-Holstein, Germany, during the PDV-epidemic year 2002. Abstracts of the European Cetacean Society Conference in Las Palmas, Gran Canaria 2003.

Lehnert, K.; Raga, J. A.; Adelung, D.; Siebert, U. (2002). „Parasitological investigations on harbour porpoises (Phocoena phocoena) from German and Norwegian waters and seals (Phoca vitulina) from the North Sea“. Abstracts of the European Cetacean Society Conference in Lüttich, Belgium 2002.

Reports

Siebert, U.; Lehnert, K.; Seibel, H.; Hasselmeier, I.; Müller, S.; Schmidt, K.; Rademaker, M. (2007): Totfundmonitoring von Kleinwalen in Schleswig-Holstein 2006. Bericht an das Ministerium für Landwirtschaft, Umwelt und ländliche Räume des Landes Schleswig-Holstein.

Siebert, U.; Seibel, H.; Hasselmeier, I.; Lehnert, K.; Müller, S.; Rademaker, M.; Schmidt, K. (2007): Untersuchungen zum Gesundheitszustand von Robben in Schleswig-Holstein im Jahr 2006. Bericht an das Ministerium für Landwirtschaft, Umwelt und ländliche Räume des Landes Schleswig-Holstein und das Landesamt für den Nationalpark Schleswig-Holsteinisches Wattenmeer.

Siebert, U.; Lehnert, K.; Seibel, H.; Mundry, R.; Fonfara, S.; Rademaker, M. (2006): Totfundmonitoring von Kleinwalen in Schleswig-Holstein 2005. Bericht an das Ministerium für Landwirtschaft, Umwelt und ländliche Räume des Landes Schleswig-Holstein.

Siebert, U.; Fonfara, S.; Mundry, R.; Lehnert, K.; Seibel, H.; Rademaker, M. (2006): Untersuchungen zum Gesundheitszustand von Robben in Schleswig-Holstein im Jahr 2005. Bericht an das Ministerium für Landwirtschaft, Umwelt und ländliche Räume des Landes Schleswig-Holstein und das Landesamt für den Nationalpark Schleswig-Holsteinisches Wattenmeer.

Siebert, U.; Lehnert, K.; Rademaker, M.; Fonfara, S. (2005): Totfundmonitoring von Kleinwalen in Schleswig-Holstein 2004. Bericht an das Ministerium für Umwelt, Natur und Landwirtschaft des Landes Schleswig-Holstein.

Siebert, U.; Fonfara, S.; Lehnert, K.; Hasselmeier, I.; Rademaker, M. (2005): Untersuchungen zum Gesundheitszustand von Robben in Schleswig-Holstein im Jahr 2004. Bericht an das Ministerium für Umwelt, Natur und Landwirtschaft des Landes Schleswig-Holstein und das Landesamt für den Nationalpark Schleswig-Holsteinisches Wattenmeer.

Siebert, U.; Lehnert, K.; Seibel, H.; Fonfara, S.; Müller, G.; Kaim, U.; Wohlsein, P.; Baumgärtner, W. (2004). Untersuchungen zum Seehundsterben 2002. Forschungsbericht an das Bundesministerium für Umwelt, Naturschutz und Reaktorsicherheit.

Siebert, U.; Lehnert, K.; Ludwig, M.; Fonfara, S. (2004). „Totfundmonitoring von Kleinwalen in Schleswig-Holstein 2003.“ Bericht an das Ministerium für Umwelt, Natur und Forsten des Landes Schleswig-Holstein.

Siebert, U.; Fonfara, S.; Lehnert, K.; Hasselmeier, I.; Ludwig, M. (2004). „Untersuchungen zum Gesundheitszustand von Robben in Schleswig-Holstein im Jahr 2003.“ Bericht an das Ministerium für Umwelt, Natur und Forsten des Landes Schleswig-Holstein.

Scheidat, M.; Gilles, A.; Lehnert, K.; Siebert, U. (2003). Erfassung von Meeressäugetieren in der deutschen AWZ der Nordsee. Endbericht für das Bundesamt für Naturschutz. F+E Vorhaben FKZ: 802 85 250, 33 pp. pdf

Scheidat, M.; Gilles, A.; Lehnert, K.; Siebert, U. (2003). Erfassung von Meeressäugetieren in der deutschen AWZ der Ostsee. Endbericht für das Bundesamt für Naturschutz. F+E Vorhaben FKZ: 802 85 260, 26 pp. pdf

Siebert, U., Lehnert, K., Ludwig, M., Fonfara, S. (2003). „Totfundmonitoring von Kleinwalen in Schleswig-Holstein 2002.“ Bericht an das Ministerium für Umwelt, Natur und Forsten des Landes Schleswig-Holstein.

Siebert, U.; Fonfara, S.; Lehnert, K.; Ludwig, M. (2003). „Untersuchungen zum Gesundheitszustand von Robben in Schleswig-Holstein im Jahr 2002.“ Bericht an das Ministerium für Umwelt, Natur und Forsten des Landes Schleswig-Holstein.

Prahl, S.; Lehnert, K.; Siebert, U. (2002). „Totfundmonitoring von Kleinwalen in Schleswig-Holstein 2001“. Bericht an das Ministerium für Umwelt, Natur und Forsten des Landes Schleswig-Holstein.

Prahl, S.; Lehnert, K.; Gaethke, U.; Siebert, U. (2002). „Untersuchungen zum Gesundheitszustand von Robben in Schleswig-Holstein im Jahr 2001“. Bericht an das Ministerium für Umwelt, Natur und Forsten des Landes Schleswig-Holstein.

Diploma thesis

Lehnert, K. (2001): „Parasitologische Untersuchungen an Schweinswalen (Phocoena phocoena) aus deutschen und norwegischen Gewässern und Seehunden (Phoca vitulina) aus der Nordsee.“ Diplomarbeit, Christian-Albrechts-Universität zu Kiel, 68 pp

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