phenotyping.de

Prof. Dr. Lars Lewejohann Freie Universität Berlin Institute of Animal Welfare, Animal Behavior and Laboratory Animal Science  Königsweg 67 14163 Berlin Germany E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it. WWW: www.phenotyping.com

Head of Unit Laboratory Animal Science German Centre for the Protection of Laboratory Animals (Bf3R) German Federal Institute for Risk Assessment (BfR) Diedersdorfer Weg 1 12277 Berlin Germany

I studied Biology and Philosophy at the University of Muenster and finished my diploma thesis in 1999. Subject of the diploma thesis was the evaluation of housing conditions of laboratory mice from an animal's point of view using preference tests. In brief: If mice have the choice, they prefer enriched housing conditions and will even work (pressing a lever up to 16 times per entry) for the access to a more entertaining housing system.
In my PhD-project "Behavioral Phenotyping of Mice: Methods, Evaluation, and Appliance" I investigated BC1-RNA knockout mice by means of a battery of behavioral tests. Tests were carried out with different knockout lines in different laboratories. The combined results indicate that although BC1 RNA does not code any protein, it seems to be involved in the modulation of explorative behavior.
In 1999 I programmed a tracking software using digital image processing techniques in order to automate data acquisition (for details on animal tracking those days, see "Digital Image Processing in Behavioral Sciences"). From 2004 to 2013 I worked at the Department of Behavioural Biology in Muenster as a researcher continuing my work with transgenic mice. From 2006 to 2010 I also was the managing director of the Otto Creutzfeldt Center for Cognitive and Behavioral Neuroscience (OCC), an association for research and education spanning different faculties of the University of Muenster focusing on behavioral neuroscience. From May 2013 to March 2016 I was employed as an interim professor at the University of Osnabrueck acting as the head of the Department for Behavioral Biology. From September 2016 to March 2017 I worked as an interim professor at the University of Goettingen. Since April 2017 I am a professor for animal welfare and refinement at the Freie Universität Berlin and the Head of Unit "Laboratory Animal Science" at the Federal Institute for Risk Assessment (BfR), Berlin. Boredom in animals that are kept under human responsibility is one of the greatest challenges for animal welfare. We therefore develop new concepts of social and environmental enrichment in order to counteract animal boredom in laboratory animals. In addition me and my group investigate individual differences, the interplay of cognition and emotion, and the animals' point of view with regard to better housing conditions and experimental designs. 

Our COST-action on homecage monitoring is online. Please see cost-teatime.org.

Giving mice their say - our work has been recognized as a "Research Highlight" in LabAnimal.

 "Understanding Mice" - an easy to read article in the BfR2Go magazine about our work.

"Tinkering mice" - Science of Intelligence and Animal Welfare

The German Centre for the Protection of Laboratory Animals (Bf3R) - short video presentation

 

Editorial boards

Behaviour
Laboratory Animals

 

Publications (see entry on Google scholar for metrics)

• Mieske, P; Scheinpflug, J, Yorgan, T; Brylka, L; Palme, R; Hobbiesiefken, U; Preikschat, J; Lewejohann, L; Diederich, K (in press): Effects of more natural housing conditions on the muscular and skeletal characteristics of female C57BL/6J mice. Laboratory Animal Research. Link to bioRxiv version.

• Kahnau, P; Mieske, P; Wilzopolski, J; Kalliokoski, O; Mandillo, S; Hölter, SM; Voikar, V; Amfim, A; Badurek, S; Bartelik, A; Caruso, A; Čater, M; Ey, E; Golini, E; Jaap, A; Hrncic, D; Kiryk, A; Lang, B; Loncarevic-Vasiljkovic1, N; Meziane, H; Radzevičienė, A; Rivalan, M; Scattoni, ML; Torquet, N; Trifkovic, J; Ulfhake, B; Thöne-Reineke, C; Diederich, K; Lewejohann, L; Hohlbaum, K (2023): Development and Application of Home Cage Monitoring in Laboratory Mice and Rats: a Systematic Review. biorXiv.

• Dolokov, A; Andresen, N; Hohlbaum, K; Thöne-Reineke, C; Lewejohann, L; Hellwich, O (2023): Upper Bound Tracker: A Multi-Animal Tracking Solution for Closed Laboratory Settings. Proceedings of the 18th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications (VISIGRAPP 2023).

• Hobbiesiefken, U; Urmersbach, B; Jaap, A; Diederich, K; Lewejohann, L (2023): Rating enrichment items by female group-housed laboratory mice in multiple binary choice tests using an RFID-based tracking system. PLOS ONE 18(1): e0278709.

• Kahnau, P; Jaap, A, Urmersbach, B; Diederich, K; Lewejohann, L (2022): Development of an IntelliCage-based Cognitive Bias Test for Mice. Open Research Europe.

• Kahnau, P; Jaap, A; Hobbiesiefken, U; Mieske, P; Diederich, K; Thöne-Reineke, C; Lewejohann, L; Hohlbaum, K (2022): A preliminary survey on the occurrence of barbering in laboratory mice in Germany. Animal Welfare 31: 433-436.

• Mieske, P; Hobbiesiefken, U; Fischer-Tenhagen, C; Heinl, C; Hohlbaum, K; Kahnau, P; Meier, J; Wilzopolski, J; Butzke, D; Rudeck, J; Lewejohann, L; Diederich, K (2022): Bored at home? - A systematic review on the effect of environmental enrichment on the welfare of laboratory rats and mice. Frontiers in Veterinary Science 9:899219.

• Kahnau, P; Jaap, A; Diederich, K; Gygax, L; Rudeck, J; Lewejohann, L (2022): Determining the value of preferred goods based on consumer demand in a home-cage based test for mice. Behavior Research Methods.

• Tappe-Theodor, A; Pitzer, C; Lewejohann, L; Jirkof, P; Siegeler, K; Segelcke, A; Drude, N; Pradier, B; Pogatzki-Zahn, E; Hollinderbäumer, B; Segelcke, D (2022): The "WWHow" concept for prospective categorization of post-operative severity assessment in rodents. Frontiers in Veterinary Science 9:841431.

• Habedank, A; Urmersbach, B; Kahnau, P; Lewejohann, L (2022): O mouse, where art thou? The Mouse Position Surveillance System (MoPSS) - an RFID based tracking system. Behavior Research Methods. 54, 676–689.

• Hobbiesiefken, U; Mieske, P; Lewejohann, L; Diederich, K (2021): Evaluation of different types of enrichment - their usage and effects on home cage behavior in female mice. PLoS ONE 16(12): e0261876.

• Mieske, P; Diederich, K; Lewejohann, L (2021): Roaming in a land of milk and honey: Life trajectories and metabolic rate of female inbred mice living in a semi natural environment. Animals 11(10): 3002.

• Kahnau, P; Guenther, A; Boon, MN; Terzenbach, JD; Hanitzsch, E; Lewejohann, L; Brust, V (2021): Lifetime observation of cognition and physiological parameters in male mice. Frontiers in Behavioral Neuroscience 15:709775.

• Habedank, A; Kahnau, P; Lewejohann, L (2021): Alternate without alternative: Neither preference nor learning explains behaviour of C57BL/6J mice in the T-maze. Behaviour 158(7): 625–662.

• Ohnesorge, N; Heinl, C; Lewejohann, L (2021): Current Methods to Investigate Nociception and Pain in Zebrafish. Frontiers in Neuroscience. 15: 378.

• Stevens, C; Hawkins, P; Smulders, TV; MacLelan, A; Lewejohann, L; Jirkof, P; Boxal, J; Murphy, H; Moody, CM; Turner, PV; Makowska, IJ; Inman, C (2021): Report of the 2020 RSPCA/UFAW rodent and rabbit welfare meeting. Animal Technology and Welfare. 21-33.

• van der Mierden, S; Leenaars, CHC; Boyle, E; Ripoli, FL; Gass, P; Durst, M; Goerlich-Jansson, VC; Jirkof, P; Keubler, LM; Talbot, SR; Habedank, A; Lewejohann, L; Tolba, R; Bleich, A (2021): Measuring endogenous corticosterone in laboratory mice—a mapping review, meta-analysis, and open source database. ALTEX 38(1), 111-122.

• Lewejohann, L; Pallerla,S; Schreiber, R; Gerula, J; Grobe, K (2020): Cerebellar morphology and behavioral profiles in mice lacking heparan sulfate Ndst gene function. Journal of Developmental Biology 8(3): 13.
  
  
• Kahnau, P; Habedank, A; Diederich, K; Lewejohann, L (2020): Behavioral methods for severity assessment. Animals 10(7): 1136.
  
  
• Andresen, N; Wöllhaf, M; Hohlbaum, K; Lewejohann, L; Hellwich, O; Thöne-Reineke, C; Belik, V (2020): Towards a fully automated surveillance of well-being status in laboratory mice using deep learning: starting with facial expression analysis. PLoS ONE 15(4): e0228059.
  
  
• Rudeck, J; Vogl, S; Banneke, S; Schoenfelder, G; Lewejohann, L (2020): Repeatability analysis improves the reliability of behavioral data. PLoS ONE 15(4): e0230900.
  
  
• Lewejohann, L; Grune, B; Schönfelder, G; Bert, B (2020): Cut back on surplus laboratory animals [All laboratory animals count]. Nature 578: 515.
  
  
• Lewejohann, L; Schwabe, K; Häger, C; Jirkof, P (2020): Impulse for animal welfare outside the experiment. Laboratory Animals, 54(2), 150–158.
  
  
• Lewejohann, L (2020): Enrichment für Versuchstiere. LBH: 10. Leipziger Tierärztekongress – Tagungsband 1, 452-454.
  
  
• Weegh, N; Füner, J; Jahnke, O; Winter, Y; Jung, C; Struve, B; Wassermann, L; Lewejohann, L; Bleich, A; Häger, C (2020): Wheel running behaviour as an indicator of disturbed wellbeing in group housed mice. Laboratory Animals 54(1), 63–72.
  
  
• Leenaars, CHC; van der Mierden, S; Durst, M; Goerlich-Jansson, VC; Lüder Ripoli, F; Keubler, LM; Talbot, SR; Boyle, E; Habedank, A; Jirkof, P; Lewejohann, L; Gass, P; Tolba, R; Bleich, A; (2020): Measurement of corticosterone in mice: a protocol for a mapping review. Laboratory Animals 54(1), 26–32.
  
  
• Jirkof, P; Rudeck, J; Lewejohann, L (2019): Assessing affective state in laboratory rodents to promote animal welfare - What is the progress in applied refinement research? Animals 9(12), 1026.
  
  
• Habedank, A; Kahnau, P; Diederich, K; Lewejohann, L (2018): Severity assessment from an animal's point of view. BMTW 18007.
  
  
• Wistuba, J; Brand, C; Werler, S; Lewejohann, L; Damm, OS (2017): Mouse models for the exploration of Klinefelter´s Syndrome. In: Conn, MJ (ed.): Animal Models for the Study of Human Disease 2nd ed.
  
  
• Penazzi, L; Lorengel, J; Sündermann, F; Golovyashkina, N; Marre, S; Mathis, CMB; Lewejohann, L; Brandt, R; Bakota, L (2017): DMSO modulates CNS function in a preclinical Alzheimer's disease model. Neuropharmacology 113: 434-444.
  
  
• Schlüns, H; Welling, H; Federici, JR; Lewejohann, L (2017): The glass is not yet half empty: Agitation but not Varroa treatment causes cognitive bias in honey bees. Animal Cognition. 20(2): 233–241.
  
  
• Siegeler, K; Lewejohann, L; Failing, K; Sachser, N; Kaiser, S (2017): Start early! Does social instability during the pre- and early postnatal development prepare male wild cavies for social challenge later in life? Frontiers in Zoology 14:2.
  
  

• Bodden, C; Richter, SH; Schreiber, RS; Kloke, V; Gerss, J; Palme, R; Lesch, KP; Lewejohann, L; Kaiser, S; Sachser, N (2015): Benefits of adversity?! How life history affects the behavioral profile of mice varying in serotonin transporter genotype. Frontiers in Behavioral Neuroscience 9: 47.
  
  

• Brust, V; Schindler, PM; Lewejohann, L (2015): Lifetime development of behavioural phenotype in the house mouse (Mus musculus). Frontiers in Zoology 12 (Suppl 1): 17.
  
  

• Freund, J; Brandmaier, AM; Lewejohann, L; Kirste, I; Kritzler, M; Krüger, A; Sachser, N; Lindenberger, U; Kempermann, G (2015): Association between exploratory activity and social individuality in genetically identical mice living in the same enriched environment. Neuroscience 309: 140-152.
  
  

• Hillje, AL; Beckmann, E; Pavlou, M; Jaeger, C; Pires Pacheco, M; Sauter, T; Schwamborn, JC; Lewejohann, L (2015): The neural stem cell fate determinant TRIM32 regulates complex behavioral traits. Frontiers in Cellular Neuroscience 9: 75.
  
  

• Kloke, V; Schreiber, RS; Bodden, C; Moellers, J; Ruhmann, H; Kaiser, S; Lesch, KP; Sacher, N; Lewejohann, L (2014): Hope for the best or prepare for the worst? Towards a spatial cognitive bias test for mice. PLoS ONE 9(8): e105431.
  
  

• Freund, J; Brandmaier, AM; Lewejohann, L; Kirste, I; Kritzler, M; Krüger, A; Sachser, N; Lindenberger, U; Kempermann, G (2013): Emergence of individuality in genetically identical mice. Science 340(6133): 756-759.

• Hillje, A; Pavlou, M; Beckmann, E; Worlitzer, MMA; Bahnassawy, L; Lewejohann, L; Palm, T; Schwamborn, JC (2013): TRIM32 dependent transcription in adult neural progenitor cells regulates neuronal differentiation. Cell Death and Differentiation. Cell Death and Differentiation: 4, e976.
  
  

• Hohoff, C; Gorji, A; Kaiser, S; Willscher, E; Korsching, E; Ambree, O; Arolt, V; Lesch, KP; Sachser, N; Deckert, J; Lewejohann, L (2013): Effect of acute stressor and serotonin transporter genotype on amygdala first wave transcriptome in mice. PLoS ONE 8(3): e58880.
  
  

• Karabeg, MM; Grauthoff, S; Kollert, S; Weidner, M; Heiming, RS; Jansen, F; Popp, S; Kaiser, S; Lesch, KP; Sachser, N; Schmitt, AG; Lewejohann, L (2013): 5-HTT Deficiency Affects Neuroplasticity and Increases Stress Sensitivity Resulting in Altered Spatial Learning Performance in the Morris Water Maze but Not in the Barnes Maze. PLoS ONE 8(10): e78238.
  
  

• Kloke, V; Heiming, RS; Bölting, S; Kaiser, S; Lewejohann, L; Lesch, KP; Sachser, N (2013): Unexpected effects of early-life adversity and social enrichment on the anxiety profile of mice varying in serotonin transporter genotype. Behavioural Brain Research 247: 248-258.
  
  

• Wistuba, J; Werler, S; Lewejohann, L (2013): Mouse models for the exploration of Klinefelter´s Syndrome. In: Conn, MJ (ed.): Animal Models for the Study of Human Disease.
  
  

• Heiming, RS; Bodden, C; Jansen, F; Lewejohann, L; Kaiser, S; Lesch, KP; Palme, R; Sachser, N (2011): Living in a dangerous world decreases maternal care: a study in serotonin transporter knockout mice. Hormones and Behavior: 397-407.
  
  

• Herring, A; Lewejohann, L; Panzer, AL; Donath, A; Kröll, O; Sachser, N; Paulus, W; Keyvani, K (2011): Preventive and therapeutic types of environmental enrichment counteract beta amyloid pathology by different molecular mechanisms. Neurobiology of Disease 42: 530-538.
  
  

• Hundelt, M; Fath, T; Selle, K; Oesterwind, K; Jordan, J; Schultz, C; Götz, J; von Engelhardt, J; Monyer, H; Lewejohann, L; Sachser, N; Bakota, L; Brandt, R (2011): Altered phosphorylation but no neurodegeneration in a mouse model of tau hyperphosphorylation. Neurobiology of Aging 32: 991-1006.
  
  

• Lewejohann, L; Zipser, B; Sachser, N (2011): "Personality" in laboratory mice used for biomedical research: A way of understanding variability? Developmental Psychobiology 53: 631-640.
  
  

• Nietzer, SL; Bonn, M; Jansen, F; Heiming, RS; Lewejohann, L; Sachser, N; Asan, ES; Lesch, KP; Schmitt, AG (2011): Serotonin transporter knockout and repeated social defeat stress: impact on neuronal morphology and plasticity in limbic brain areas. Behavioural Brain Research 220: 42-54.
  
  

• Richter, SH; Garner, JP; Zipser, B; Lewejohann, L; Sachser, N; Touma, C; Schindler, B; Chourbaji, S; Brandwein, C; Gass, P; van Stipdonk, N; van der Harst, J; Spruijt, B; Voikar, V; Wolfer, DP; Würbel, H (2011): Effect of population heterogenization on the reproducibility of mouse behavior: a multi-laboratory study. PLoS one 6: e16461.
  
  

• Jansen, F; Heiming, RS; Lewejohann, L; Touma, C; Palme, R; Schmitt, A; Lesch, KP; Sachser, N (2010): Modulation of Behavioural Profile and Stress Response by 5-HTT Genotype and Social Experience in Adulthood. Behavioural Brain Research 207: 21-29.
  
  

• Lewejohann, L; Kloke, V; Heiming, RS; Jansen, F; Kaiser, S; Schmitt, A; Lesch, KP; Sachser, N (2010): Social status and day-to-day behaviour of male serotonin transporter knockout mice. Behavioural Brain Research 211: 80-88.
  
  

• Lewejohann, L; Pickel, T; Sachser, N; Kaiser, S (2010): Wild genius - domestic fool? Spatial learning abilities of wild and domestic guinea pigs. Frontiers in Zoology: 7-9.
  
  

• Ambrée, O; Richter, SH; Sachser, N; Lewejohann, L; Dere, E; de Souza Silva, MA; Herring, A; Keyvani, K; Paulus, W; Schäbitz, WR (2009): Levodopa ameliorates learning and memory deficits in a murine model of Alzheimer's disease. Neurobiology of Aging 30: 1192-1207.
  
  

• Diederich, K; Sevimli, S; Dörr, H; Kösters, E; Hoppen, M; Lewejohann, L; Klocke, R; Minnerup, J; Knecht, S; Nikol, S; Sachser, N; Schneider, A; Gorji, A; Sommer, C; Schäbitz, WR (2009): The role of granulocyte-colony stimulating factor (G-CSF) in the healthy brain: A characterization of G-CSF deficient mice. The Journal of Neuroscience 29: 11672-11581.
  
  

• Heiming, RS; Jansen, F; Lewejohann, L; Kaiser, S; Schmitt, A; Lesch, KP; Sachser, N (2009): Living in a dangerous world: the shaping of behavioral profile by early environment and 5-HTT genotype. Frontiers in Behavioral Neuroscience 3: 26.
  
  

• Lewejohann, L; Damm, OS; Luetjens, CM; Hämäläinen, T; Simoni, M; Nieschlag, E; Gromoll, J; Wistuba, J (2009): Impaired recognition memory in male mice with a supernumerary X chromosome. Physiology & Behavior 96: 22-29.
  
  

• Lewejohann, L; Hoppmann, AM; Kegel, P; Kritzler, M; Krüger, T; Sachser, N (2009): Behavioral phenotyping of a murine model of Alzheimer's disease in a semi-naturalistic environment using RFID tracking. Behavior Research Methods 41: 850-856.
  
  

• Lewejohann, L; Reefmann, N; Widmann, P; Ambrée, O; Herring, A; Keyvani, K; Paulus, W; Sachser, N (2009): Transgenic Alzheimer mice in a semi-naturalistic environment: More plaques, yet not compromised in daily life. Behavioural Brain Research 201: 99-102.
  
  

• Bacher, M; Dodel, R; Aljabari, B; Keyvani, K; Marambaud, P; Kayed, R; Glabe, C; Görtz, N; Hoppmann, A; Sachser, N; Klotsche, J; Schnell, S; Lewejohann, L; Al-Abed, Y (2008): CNI-1493 inhibits Aß production, plaque formation, and cognitive deterioration in an aimal model of Alzheimer's disease. The Journal of Experimental Medicine 205 (7): 1593-1599.
  
  

• Görtz, N; Lewejohann, L; Tomm, M; Ambrée, O; Keyvani, K; Paulus, W; Sachser, N (2008): Effects of environmental enrichment on exploration, anxiety, and memory in female TgCRND8 Alzheimer mice. Behavioural Brain Research 191: 43-48.
  
  

• Lewejohann, L (2008): Fill My Datebook: A Software Tool to Generate and Handle Lists of Events. Behavior Research Methods 40 (2): 391-393.
  
  

• Pallerla, SR; Lawrence, R; Lewejohann, L; Pan, Y; Fischer, T; Schlomann, U; Zhang, X; Esko, JD; Grobe, K (2008): Altered heparan sulfate structure in mice with deleted NDST3 gene function. The Journal of Biological Chemistry 283: 16885-16894.
  
  

• Richter, SH; Ambrée, O; Lewejohann, L; Herring, A; Keyvani, K; Paulus, W; Palme, R; Touma, C; Schäbitz, WR; Sachser, N (2008): Wheel-running in a transgenic mouse model of Alzheimer's disease: protection or symptom? Behavioural Brain Research 190: 74-84.
  
  

• Kritzler, M; Lewejohann, L; Krüger, A (2007): Analysing Movement and Behavioural Patterns of Laboratory Mice in a Semi Natural Environment Based on Data collected via RFID-Technology. In: Gottfried, B (ed.): Workshop on Behaviour Monitoring and Interpretation. Osnabrück.
  
  

• Kritzler, M; Lewejohann, L; Krüger, A; Raubal, M; Sachser, N (2006): An RFID-based tracking system for laboratory mice in a semi-natural environment. In: A. Schmidt, S. Spiekermann, A. Gershman, F. Michahelles (ed.): PTA2006 Workshop, PERVASIVE - pervasive technology applied real-world experiences with RFID and sensor networks. Dublin, Ireland.
  
  

• Lewejohann, L; Reinhard, C; Schrewe, A; Brandewiede, J; Haemisch, A; Görtz, N; Schachner, M; Sachser, N (2006): Environmental Bias? Effects of Housing Conditions, Laboratory Environment, and Experimenter on Behavioral Tests. Genes Brain and Behavior 5: 64-72.
  
  

• Lewejohann, L; Skryabin, BV; Sachser, N; Prehn, C; Heiduschka, P; Thanos, S; Jordan, U; Dell'Omo, G; Vyssotski, AL; Pleskacheva, MG; Lipp, HP; Tiedge, H; Brosius, J; Prior, H (2004): Role of a neuronal small non-messenger RNA: behavioural alterations in BC1 RNA-deleted mice. Behavioural Brain Research 154: 273-289.
  
  

• Touma, C; Ambrée, O; Görtz, N; Keyvani, K; Lewejohann, L; Palme, R; Paulus, W; Schwarze-Eicker, K; Sachser, N (2004): Age- and sex-dependent development of adrenocortical hyperactivity in a transgenic mouse model of Alzheimer's disease. Neurobiology of Aging 25: 893-904.
  
  

• Skryabin, BV; Sukonina, V; Jordan, U; Lewejohann, L; Sachser, N; Muslimov, I; Tiedge, H; Brosius, J (2003): Neuronal untranslated BC1 RNA: targeted gene elimination in mice. Molecular and Cellular Biology 23: 6435-6441.
  
  

• Böckels, C; Lewejohann, L; Sachser, N (2002): Applying elo-rating to assess dominance hierarchiy in male mice. Zoology 105, Supplement V (DZG 95.1): 3.
  
  

• Lewejohann, L (2002): Buchrezension zu Sapolsky, R.M. 'Mein Leben als Pavian'. Spektrum der Wissenschaft 8: 102.
  
  

• Lewejohann, L; Prior, H; Brosius, J; Sachser, N; Skryabin, BV (2002): Behavioural phenotyping of mice lacking BC1, a non-protein coding gene. Zoology 105, Supplement V (DZG 95.1): 3.
  
  

• Lewejohann, L (2001): Buchrezension zu Tembrock, G. 'Angst'. Spektrum der Wissenschaft 9: 95.
  
  

• Lewejohann, L (2001): Was für ein Haus will die Maus? Rodentia 1: 73-75.
  
  

• Lewejohann, L; Edich, I; Sachser, N (2001): Rhythm of activity in closely related inbred strains of mice. Contributions to the XXVII International Ethological Conference, Tübingen, Advances in Ethology 36. Supplements to Ethology: 204.
  
  

• Lewejohann, L; Edich, I; Sachser, N (2001): Circadian rhythm of three closely related inbred strains of mice differing in aggressive behaviour. Zoology 104, Supplement IV (DZG 94.1): 7.
  
  

• Lewejohann, L; Sachser, N (2000): Evaluation of different housing conditions for male laboratory mice. Zoology 103, Supplement III (DZG 93.1): 31.
  
  

• Lewejohann, L; Sachser, N (2000): Präferenztests zur Beurteilung unterschiedlicher Haltungsbedingungen von männlichen Labormäusen. In: Aktuelle Arbeiten zur artgemäßen Tierhaltung 1999. KTBL Schrift 391. Darmstadt: 170-177.
  
  

• Lewejohann, L; Wistuba, J (1999): Mimicry, disappearing acts and imposters. Reptilia (GB) 8: 70-75.
  
  

• Lewejohann, L; Wistuba, J (1997): Guck mal wer da rasselt - 'Geräuschmimikry' bei Schlangen. Reptilia 6: 28-29.
  
  

• Lewejohann, L; Wistuba, J (1997): Mimikry - Tarnkappen und Hochstapler. Reptilia 6: 16-21.