© Peter Leßmann

Prof. Dr. norbert sachser

sachser@uni-muenster.de

Tel: (+49)-(0)251-83-23884
Fax: (+49)-(0)251-83-23896

Room 152

Office hours: upon consultation

 
  • Research Areas

    • Behavioural biology
    • Environment, genes, and behaviour
    • Stress & welfare
    • Evolution and development of social behavior
    • Biology of individuality
  • CV

    Education

    Studies in biology, chemistry, and social sciences promoted by the German National Academic Foundation at the University of Bielefeld, Germany
    PhD thesis (Dr. rer. nat) in zoology and behavioural biology promoted by the German National Academic Foundation at the department of Behavioural Biology, University of Bielefeld, Germany

    Positions

    Senior professorship at the faculty of biology, University of Münster
    Professor (C4) for behavioural biology, University of Münster
    Professor (C3) for zoology and behavioural biology, University of Münster
    Assistant professor, Department for Animal Physiology, Bayreuth University
    Habilitation and venia legendi in zoology, Bayreuth University
    Postdoctoral fellow, Department for Animal Physiology, Bayreuth University

    Honors

    Award for Science Communication - communicating.knowledge – Münster University Society
    Honorary member of the Ethological Society – Board of the Ethological Society

    External Functions

    Chairman of the academic advisory council of the Institute for Ornithology "Ornithological Station Helgoland"
    President of Münster Alliance for Science
    Member of scientific advisory board at the Faculty of Life Sciences, University of Wien
    Member of board of trustees of the foundation "Bündnis Mensch & Tier"
    Member of the advisory board of the Wageningen Institute of Animal Sciences
    Member of the external scientific advisory board of the Groningen Institute for Evolutionary Life Sciences
    Vice chairman of the scientific advisory board, University of Münster
    Member of the steering committee, CRC Transregio 212 "Individualisation in Evolution, Ecology, and Behaviour"
    Member of the academic advisory council of the Institute for Ornithology "Ornithological Station Helgoland"
    Member of the steering committee, CRC Transregio 58 "Fear, Anxiety, Anxiety Disorders"
    Honorary Member of the Ethological Society
    Member of the strategy committee science (Münster Alliance for Science)
    Liaison professor ("Vertrauensdozent") of the German National Academic Foundation
    Member of the Academic Senate, University of Münster
    Member of the steering committee "Münster Graduate School of Evolution" (MGSE)
    Member of the scientific board "Center for the Philosophy of Science", University of Münster
    Member of the academic advisory council for the PhD program BIOREC ("Biological Responses to Environmental Challenge")
    Editorial board: Hormones & Behavior
    Member of the senate commission on experimental research (DFG/German Research Foundation)
    Member of advisory board at the Institute for Theological Zoology (patroness: Jane Goodall)
    Member of the Research Council, University of Münster
    Dean, faculty of biology, University of Münster
    Vice Dean, faculty of biology, University of Münster
    Organization of first european conference on behavioural biology (ECBB) / foundation of a conference tradition
    President Ethologische Gesellschaft (Ethological Society)
    Vice-president Ethologische Gesellschaft (Ethological Society)
    Editorial board: Physiology & Behavior
    Advisory board German Zoological Society
    German delegate of the International Ethological Council
    Young German Scientist at the Dahlem conference on sexual selection
    Member of the Deutsche Zoologische Gesellschaft (German Zoological Society)
    Member of the Ethologische Gesellschaft (Ethological Society)

    Appointments

    wwu muenster, behavioural biology (C4) – accepted
    Universität Hamburg, behavioural ecology (C4) – rejected
    wwu muenster, zoology / behavioural biology (C3) – accepted
  • Projects

    • The Underrated Animal (Rowohlt) (since )
      Own Resources Project
    • NC3 – CRC 212 - A Novel Synthesis of Individualisation across Behaviour, Ecology and Evolution: Niche Choice, Niche Conformance, Niche Construction ()
      Main DFG-Project Hosted outside the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR 212/1; TRR 212/2
    • RTG 2220 EvoPAD – RTG 2220: Evolutionary Processes in Adaptation and Disease ()
      Main DFG-Project Hosted at the University of Münster: DFG - Research Training Group | Project Number: GRK 2220/1
    • CRC TRR 212 A02 - Optimistic and pessimistic decision making under ambiguity: causes and consequences for niche choice and niche conformance ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR 212/1
    • CRC TRR 212 B01 - Social niche conformance and social niche transition during adolescence and beyond: effects on biobehavioural profile and fitness ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR 212/1
    • CRC TRR 212 - S: Technology Service Platforms ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR 212/1
    • The Individual in the Focus of Life Sciences ()
      Internally at the University of Münster Funded Project: Uni Münster-internal funding - Topical Programs
    • The Limits of Adaptation (Rowohlt) (since )
      Own Resources Project
    • CRC TRR 58 - A01: Life history, serotonin transporter genotype and anxiety-like behaviour: testing the "coping-with-challenge hypothesis" ()
      Subproject in DFG-Joint Project Hosted at the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR 58/4
    • Much Like Us - What Science Reveals about the Thoughts, Feelings, and Behaviour of Animals (Rowohlt) (since )
      Individual Granted Project: Stifterverband für die Deutsche Wissenschaft e.V., Klaus Tschira Stiftung gGmbH
    • MGSE – Münster Graduate School of Evolution - Unterstützung des Evolution Think Tank ()
      Individual Granted Project: Santander Consumer Bank AG
    • FOR 1232 TP06 - The social modulation of behavioural profile and stress responsiveness during adolescence: an adaptive mechanisms? ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Research Unit | Project Number: SA 389/11-2; 597932
    • FOR 1232 TPZ - Administration of the Research Unit and central platforms for "Genetic paternity determination" and "Endocrinological determination" ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Research Unit | Project Number: KA 1546/9-1
    • CRC TRR 58 - A01: Life history, serotonergic system, and anxiety-like behaviour: testing the mismatch hypothesis ()
      Subproject in DFG-Joint Project Hosted at the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR58/3
    • The Biology of Individuality (since )
      Own Resources Project
    • CRC TRR 58 - A01: The Influence of early life stress on anxiety-like behavior: the significance of the preand postnatal phase for gene x environment interactions and the modifiability of its outcome later in life ()
      Subproject in DFG-Joint Project Hosted at the University of Münster: DFG - Collaborative Research Centre | Project Number: TRR58/1
    • FOR 1232 TPZ - Administration of the Research Unit and central platforms for "Genetic paternity determination" and "Endocrinological determination" ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Research Unit | Project Number: KA 1546/7-1:1
    • FOR 1232 TP06 - Social modulation of behavioural profile and stress responsiveness during adolescence: mechanisms and function. ()
      Subproject in DFG-Joint Project Hosted outside the University of Münster: DFG - Research Unit | Project Number: SA 389/11-1:1
    • Gene x Environment Interactions in the Control of Aggressive Behaviour ()
      Individual Granted Project: DFG - Individual Grants Programme | Project Number: 551821
    • Gene x Environment Interaction and the Alzheimer’s Disease ()
      Own Resources Project
    • Die ethologische Charakterisierung genmanipulierter Labormäuse: Eine Basis zur molekulargenetischen Analyse komplexen Verhaltens ()
      Individual Granted Project: DFG - Individual Grants Programme
    • Interdisciplinary Discourse with the Humanities (since )
      Own Resources Project
    • Evolution and Development of Social Behaviour (since )
      Own Resources Project
    • Stress, Stress Avoidance and Animal Welfare (since )
      Own Resources Project
  • Publications

    • Rystrom TL, Wesseler Y, Richter SH, Sachser N, Kaiser S. . ‘Shaped by you: The effect of social partner on cortisol and behavior during adolescence in a female rodent.’ Ethology 130: e13414. doi: 10.1111/eth.13414.

    • Stieger B, Wesseler Y, Kaiser S, Sachser N, Richter SH. . ‘Behavioral lateralization of mice varying in serotonin transporter genotype.’ Frontiers in Behavioral Neuroscience 16: 1095567. doi: 10.3389/fnbeh.2022.1095567.
    • Kaiser S, Korte A, Wistuba J, Baldy M, Wissmann A, Dubičanac A, Richter SH, Sachser N. . ‘Effects of castration and sterilization on cortisol responsiveness – a case study in male guinea pigs.’ Frontiers in Veterinary Science 9, No. 1093157. doi: 10.3389/fvets.2022.1093157.
    • Quante, SM; Siewert, V; Palme, R; Kaiser, S; Sachser, N; Richter SH. . ‘The power of a touch: Regular touchscreen training but not its termination affects hormones and behavior in mice.’ Frontiers in Behavioral Neuroscience 17. doi: 10.3389/fnbeh.2023.1112780.
    • Mutwill AM, Schielzeth H, Richter SH, Kaiser S, Sachser N. . ‘Conditional on the social environment? Roots of repeatability in hormone concentrations of male guinea pigs.Hormones and Behavior 155: 105423.
    • Bohn L, Bierbaum L, Kästner N, von Kortzfleisch VT, Kaiser S, Sachser N, Richter SH. . ‘Structural enrichment for laboratory mice: exploring the effects of novelty and complexity.’ Frontiers in Veterinary Science 10: 1207332. doi: 10.3389/fvets.2023.1207332.

    • Norbert Sachser. . Much Like Us: What Science Reveals about the Thoughts, Feelings, and Behaviour of Animals.: Cambridge University Press.
    • Sachser, Norbert; Kästner, Niklas; Zimmermann, Tobias (Hrsg.): . Das Unterschätzte Tier: Was wir heute über Tiere wissen und im Umgang mit ihnen besser machen müssen. Hamburg: Rowohlt Taschenbuch Verlag.
    • Stieger B, Palme R, Kaiser S, Sachser N, Richter SH. . ‘When left is right: The effects of paw preference training on behaviour in mice.’ Behavioural Brain Research 430, No. 113929.
    • Von Kortzfleisch VT, Ambrée O, Karp NA, Meyer N, Novak J, Palme R, Rosso M, Touma C, Würbel H, Kaiser S, Sachser N, Richter SH. . ‘Do multiple experimenters improve the reproducibility of animal studies?PLoS Biology 20(3), No. e3001564. doi: 10.1371/journal.pbio.3001564.
    • Rystrom TL, Prawitt RC, Richter SH, Sachser N, Kaiser S. . ‘Repeatability of endocrine traits and dominance rank in female guinea pigs.’ Frontiers in Zoology 19, No. 1: 4. doi: 10.1186/s12983-021-00449-2.
    • Feige-Diller J, Herrera-Rivero M, Witten A, Stoll M, Kaiser S, Richter SH, Sachser N. . ‘The impact of varying food availability on gene expression in the liver: Testing the Match-Mismatch hypothesis.Frontiers in Nutrition 9, No. 910762.
    • Bračić M, Bohn L, Siewert V, von Kortzfleisch V, Schielzeth H, Kaiser S, Sachser N, Richter SH. . ‘Once an Optimist, Always an Optimist? Studying Cognitive Judgment Bias in Mice.’ Behavioral Ecology 33: 775–788.
    • Herrera-Rivero M, Bohn L, Witten A, Jüngling K, Kaiser S, Richter SH, Stoll M, Sachser N. . ‘Transcriptional profiles in the mouse amygdala after a cognitive judgment bias test largely depend on the genotype.’ Frontiers in Molecular Neuroscience 15: 1025389. doi: 10.3389/fnmol.2022.1025389.

    • Feige-Diller J, Palme R, Kaiser S, Sachser N, Richter SH. . ‘The impact of varying food availability on health and welfare in mice: Testing the Match-Mismatch hypothesis.’ Physiology and Behavior 228, No. 113193. doi: 10.1016/j.physbeh.2020.113193.
    • Mutwill AM, Schielzeth H, Zimmermann TD, Richter SH, Kaiser S, Sachser N. . ‘Individuality meets plasticity: Endocrine phenotypes across male dominance rank acquisition in guinea pigs living in a complex social environment.’ Hormones and Behavior 131: 104967. doi: 10.1016/j.yhbeh.2021.104967.
    • Stieger B, Melotti L, Quante SM, Kaiser S, Sachser N, Richter SH. . ‘A step in the right direction: the effect of context, strain and sex on paw preference in mice.’ Animal Behaviour 174: 21–30. doi: 10.1016/j.anbehav.2021.01.012.
    • Bodden C, Wewer M, Kästner N, Palme R, Kaiser S, Sachser N, Richter SH. . ‘Not all mice are alike: Mixed-strain housing alters social behaviour.’ Physiology and Behavior 228, No. 113220. doi: 10.1016/j.physbeh.2020.113220.
    • Melotti L, Siestrup S, Peng M, Vitali V, Dowling D, von Kortzfleisch VT, Bracic M, Sachser N, Kaiser S, Richter SH. . ‘Individuality, as well as genetic background, affects syntactical features of courtship songs in male mice.’ Animal Behaviour 180: 179–196.

    • Feige-Diller J, Krakenberg V, Bierbaum L, Seifert L, Palme R, Kaiser S, Sachser N, Richter SH. . ‘The effects of different feeding routines on welfare in laboratory mice.’ Frontiers in Veterinary Science 6: 479.
    • Von Kortzfleisch VT, Karp NA, Palme R, Kaiser S, Sachser N, Richter SH. . ‘Improving reproducibility in animal research by splitting the study population into several ‘mini-experiments’.’ Scientific Reports 10, No. 16579. doi: 10.1038/s41598-020-73503-4.
    • Mutwill AM, Zimmermann TD, Hennicke A, Richter SH, Kaiser S, Sachser N. . ‘Adaptive reshaping of the hormonal phenotype after social niche transition in adulthood.’ Proceedings of the Royal Society B: Biological Sciences 287: 20200667. doi: 10.1098/rspb.2020.0667.
    • Sachser N, Zimmermann TD, Hennessy MB, Kaiser S. . ‘Sensitive phases in the development of rodent social behavior.’ Current Opinion in Behavioral Sciences 36: 63–70. doi: 10.1016/j.cobeha.2020.07.014.
    • Krakenberg, Viktoria; Siestrup, Sophie; Palme, Rupert; Kaiser, Sylvia; Sachser, Norbert; Richter, Sophie Helene. . ‘Effects of different social experiences on emotional state in mice.’ Scientific Reports 10, No. 15255. doi: 10.1038/s41598-020-71994-9.

    • Mutwill AM, Zimmermann TD, Reuland C, Fuchs S, Kunert J, Richter SH, Kaiser S, Sachser N. . ‘High reproductive success despite queuing – Socio-sexual development of males in a complex social environment.’ Frontiers in Psychology 10: 2810. doi: 10.3389/fpsyg.2019.02810.
    • Krakenberg V, von Kortzfleisch V, Kaiser S, Sachser N, Richter SH. . ‘Differential effects of serotonin transporter genotype on anxiety-like behavior and cognitive judgment bias in mice.’ Frontiers in Behavioral Neuroscience 13: 263.
    • Bodden C, von Kortzfleisch V, Karwinkel F, Kaiser S, Sachser N, Richter SH. . ‘Heterogenising study samples across testing time improves reproducibility of behavioural data.’ Scientific Reports 9: 8247.
    • Von Kortzfleisch V, Kästner N, Prange L, Kaiser S, Sachser N, Richter SH. . ‘Have I been here before? Effects of repeated testing and age on the results of behavioural tests.’ Behavioural Brain Research 367: 143–148.
    • Melotti L, Kästner N, Eick AK, Schnelle AL, Palme R, Sachser N, Kaiser S, Richter SH. . ‘Can live with ‘em, can live without ‘em: pair housed male C57BL/6J mice show low aggression and increasing sociopositive interactions with age, but can adapt to single housing if separated.Applied Animal Behaviour Science 214: 79–88.
    • Kästner N, Richter SH, Urbanik S, Kunert J, Waider J, Lesch K-P, Kaiser S, Sachser N. . ‘Brain serotonin deficiency affects female aggression.’ Scientific Reports 9, No. 1366.
    • Krakenberg V, Woigk I, Garcia Rodriguez L, Kästner N, Kaiser S, Sachser N, Richter SH. . ‘Technology or ecology? New tools to assess cognitive judgement bias in mice.’ Behavioural Brain Research 362: 279–287.

    • Bodden C., Siestrup S., Palme R., Kaiser S., Sachser N., Richter S., Richter S.,. . ‘Evidence-based severity assessment: Impact of repeated versus single open-field testing on welfare in C57BL/6J mice.’ Behavioural Brain Research 336: 268. doi: 10.1016/j.bbr.2017.08.029.
    • Kästner N, Richter SH, Bodden C, Palme R, Kaiser S, Sachser N. . ‘Varying social experiences in adulthood do not differentially affect anxiety-like behavior but stress hormone levels.’ Frontiers in Behavioral Neuroscience 12: 72.
    • Sachser N, Hennessy MB, Kaiser S. . ‘The adaptive shaping of social behavioural phenotypes during adolescence.’ Biology Letters 14. doi: 10.1098/rsbl.2018.0536.
    • Norbert Sachser. . Der Mensch im Tier: Warum Tiere uns im Denken, Fühlen und Verhalten oft so ähnlich sind.: Rowohlt Taschenbuch Verlag.
    • Sachser N, Richter SH, Kaiser S. . „Artgerecht/tiergerecht.“ In Handbuch Tierethik, herausgegeben von Ach JS, Borchers D, 155–160. Stuttgart: J.B. Metzler Verlag.
    • Richter SH, Sachser N, Kaiser S. . „Emotionen.“ In Handbuch Tierethik, herausgegeben von Ach JS, Borchers D, 64–69. Stuttgart: J.B. Metzler Verlag.

    • Bodden C., Van Den Hove D., Lesch K., Lesch K., Sachser N.,. . ‘Impact of varying social experiences during life history on behaviour, gene expression, and vasopressin receptor gene methylation in mice.’ Scientific Reports 7, No. 1. doi: 10.1038/s41598-017-09292-0.
    • Sangenstedt S., Jaljuli I., Sachser N., Kaiser S. . ‘Stress responsiveness and anxiety-like behavior: The early social environment differentially shapes stability over time in a small rodent.’ Hormones and Behavior 90, No. null: 90–97. doi: 10.1016/j.yhbeh.2017.02.010.
    • Zimmermann TD, Kaiser S, Sachser N. . ‘The adaptiveness of a queuing strategy shaped by social experiences during adolescence.’ Physiology and Behavior 181: 29–37. doi: 10.1016/j.physbeh.2017.08.025.
    • Meyer N, Jenikejew J, Richter SH, Kaiser S, Sachser N. . ‘Social experiences during adolescence affect anxiety-like behavior but not aggressiveness in male mice.’ Behavioural Brain Research 326: 147–153. doi: 10.1016/j.bbr.2017.03.017.
    • Zimmermann TD, Kaiser S, Hennessy MB, Sachser N. . ‘Adaptive shaping of the behavioural and neuroendocrine phenotype during adolescence.’ Proceedings of the Royal Society B: Biological Sciences 284, No. 1849. doi: 10.1098/rspb.2016.2784.
    • Talarico M., Seifert F., Lange J., Sachser N., Kurtz J., Scharsack J. . ‘Specific manipulation or systemic impairment? Behavioural changes of three-spined sticklebacks (Gasterosteus aculeatus) infected with the tapeworm Schistocephalus solidus.’ Behavioral Ecology and Sociobiology 71, No. 2. doi: 10.1007/s00265-017-2265-9.
    • Kästner, N, Richter, SH, Gamer, M, Kaiser, S, Sachser, N. . ‘What a difference a day makes - female behaviour is less predictable near ovulation.’ Royal Society Open Science 4. doi: 10.1098/rsos.160998.

    • Graulich D.M., Kaiser S., Sachser N., Richter S.H. . ‘Looking on the bright side of bias - validation of an affective bias test for laboratory mice.’ Applied Animal Behaviour Sciences 181.
    • Remmes J, Bodden C, Richter SH, Lesting J, Sachser N, Pape H-C, Seidenbecher T. . ‘Impact of life history on fear memory and extinction.’ Frontiers in Behavioural Neuroscience 10: 185. doi: 10.3389/fnbeh.2016.00185.
    • Meyer N, Richter SH, Schreiber RS, Kloke V, Kaiser S, Lesch KP, Sachser N. . ‘The Unexpected Effects of Beneficial and Adverse Social Experiences during Adolescence on Anxiety and Aggression and Their Modulation by Genotype.’ Frontiers in Behavioral Neuroscience 10, No. 97. doi: 10.3389/fnbeh.2016.00097.
    • Richter SH, Kästner, N, Loddenkemper, DH, Kaiser, S, Sachser, N. . ‘A time to wean? Impact of weaning age on anxiety-like behaviour and stability of behavioural traits in full adulthood.’ PloS one 11(12): e0167652. doi: 10.1371/journal.pone.0167652.
    • Richter, SH, Kästner, N, Kriwet, M, Kaiser, S, Sachser, N. . ‘Play matters - the surprising relationship between juvenile playfulness and anxiety in later life.’ Animal Behaviour 114: 261–271. doi: 10.1016/j.anbehav.2016.02.003.

    • Trillmich F, Günther A, Müller C, Reinhold K, Sachser N. . ‘New perspectives in behavioural development: adaptive shaping of behaviour over a lifetime?Frontiers in Zoology 12(Suupl 1): 4. doi: 10.1186/1742-9994-12-S1-S1.
    • Kaiser S, Hennessy MB, Sachser N. . ‘ Domestication affects the structure, development and stability of biobehavioural profiles.’ Frontiers in Zoology 12 (Suppl1): 19.
    • Bodden, C; Richter, SH; Schreiber, RS; Kloke, V; Gerss, J; Palme, R; Lesch, KP; Lewejohann, L; Kaiser, S; Sacher, N. . ‘Benefits of adversity?! How life history affects the behavioral profile of mice varying in serotonin transporter genotype.’ Frontiers in Behavioral Neuroscience 9, No. 47. doi: 10.3389/fnbeh.2015.00047.
    • Hennessy M.B., Kaiser S., Tiedtke T., Sachser N. . ‘Stability and change: Stress responses and the shaping of behavioural phenotypes over the life span.’ Frontiers in Zoology 12 (Suppl1).
    • Kästner N., Richter S.H., Lesch K.P., Schreiber R.S., Kaiser S., Sachser N. . ‘Benefits of a "vulnerability gene"? A study in serotonin transporter knockout mice.’ Behavioural Brain Research 283. doi: 10.1016/j.bbr.2015.01.031.
    • Kaiser S., Schwerdt B., Siegeler K., Sachser N. . ‘Social instability during pregnabcy and lactation alters female wild cavy offsprings' endocrine status and behaviour later in life.’ Behaviour 152.
    • Bodden C., Richter S.H., Schreiber R.S., Kloke V., Gerss J., Palme R., Lesch K.P., Lewejohann L., Kaiser S., Sachser N. . ‘Benefits of adversity?! How life history affects the behavioral profile of mice vaying in serotonin transporter genotype.’ Frontiers in Behavioral Neuroscience 9: 47.
    • Freund J., Brandmaier A., Lewejohann L., Kirste I., Kritzler M., Krüger A., Sachser N., Lindenberger U., Kempermann G. . ‘Association between exploratory activity and social individuality in genetically identical mice living in the same enriched environment.’ Neuroscience 309, No. null: 140–152. doi: 10.1016/j.neuroscience.2015.05.027.
    • Sachser N, Richter SH. . ‘Animals can tell us more.Behavioral and Brain Sciences 38: 44–45.

    • Zipser B, Schleking A, Kaiser S, Sachser N. . ‘Effects of domestication on biobehavioural profiles: a comparison of domestic guinea pigs and wild cavies from early to late adolescence.’ Frontiers in Zoology 11.

    • Sachser N, Kaiser S, Hennessy MB. . ‘Behavioural profiles are shaped by social experience: when, how and why.Philosophical Transactions of the Royal Society B: Biological Sciences 368, No. 1618: 20120344. doi: 10.1098/rstb.2012.0344.
    • Siegeler K, Wistuba J, Damm OS, von Engelhardt N, Sachser N, Kaiser S. . ‘Early social instability affects plasma testosterone during adolescence but does not alter reproductive capacity or measures of stress later in life.Physiology and Behavior 120C: 143–149. doi: 10.1016/j.physbeh.2013.08.008.
    • Freund J, Brandmaier AM, Lewejohann L, Kirste I, Kritzler M, Krüger A, Sachser N, Lindenberger U, Kempermann G. . ‘Emergence of individuality in genetically identical mice.Science 340, No. 6133: 756. doi: 10.1126/science.1235294.
    • Kloke V, Heiming RS, Bölting S, Kaiser S, Lewejohann L, Lesch KP, Sachser N. . ‘Unexpected effects of early-life adversity and social enrichment on the anxiety profile of mice varying in serotonin transporter genotype.Behavioural Brain Research 247C: 248–258. doi: 10.1016/j.bbr.2013.03.039.
    • Heiming RS, Mönning A, Jansen F, Kloke V, Lesch KP, Sachser N. . ‘To attack, or not to attack? The role of serotonin transporter genotype in the display of maternal aggression.Behavioural Brain Research 242: 135. doi: 10.1016/j.bbr.2012.12.045.
    • Hohoff C, Gorji A, Kaiser S, Willscher E, Korsching E, Ambrée O, Arolt V, Lesch K-P, Sachser N, Deckert J, Lewejohann L. . ‘Effect of acute stressor and serotonin transporter genotype on amygdala first wave transcriptome in mice.’ PloS one 8, No. (3): e58880.

    • Kloke V, Jansen F, Heiming RS, Palme R, Lesch K-P, Sachser N. . ‘The winner and loser effect, serotonin transporter genotype, and the display of offensive aggression.’ Physiology and Behavior 103, No. 5: 565–574. doi: 10.1016/j.physbeh.2011.04.021.
    • 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, Võikar V, Wolfer DP, Würbel H. . ‘Effect of population heterogenization on the reproducibility of mouse behavior: a multi-laboratory study.PloS one 6, No. 1: e16461. doi: 10.1371/journal.pone.0016461.
    • Narayanan V, Heiming RS, Jansen F, Lesting J, Sachser N, Pape HC, Seidenbecher T. . ‘Social defeat: impact on fear extinction and amygdala-prefrontal cortical theta synchrony in 5-HTT deficient mice.PloS one 6, No. 7: e22600. doi: 10.1371/journal.pone.0022600.
    • Lürzel S, Kaiser S, Krüger, C., Sachser N. . ‘Inhibiting influence of testosterone on stress responsiveness during adolescence.Hormones and Behavior 60, No. 5: 691–698.
    • Lürzel S, Kaiser S, Sachser N. . ‘Social interaction decreases stress responsiveness during adolescence.Psychoneuroendocrinology 36, No. 9: 1370. doi: 10.1016/j.psyneuen.2011.03.010.
    • Siegeler K, Sachser N, Kaiser S. . ‘The social environment during pregnancy and lactation shapes the behavioral and hormonal profile of male offspring in wild cavies.Developmental Psychobiology 53, No. 6: 575. doi: 10.1002/dev.20585.
    • Lewejohann L, Zipser B, Sachser N. . ‘"Personality" in laboratory mice used for biomedical research: a way of understanding variability?Developmental Psychobiology 53, No. 6: 624. doi: 10.1002/dev.20553.
    • Heiming RS, Bodden C, Jansen F, Lewejohann L, Kaiser S, Lesch KP, Palme R, Sachser N. . ‘Living in a dangerous world decreases maternal care: a study in serotonin transporter knockout mice.Hormones and Behavior 60, No. 4: 397–407. doi: 10.1016/j.yhbeh.2011.07.006.
    • 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. . ‘Altered phosphorylation but no neurodegeneration in a mouse model of tau hyperphosphorylation.Neurobiology of Aging 32, No. 6: 991–1006. doi: 10.1016/j.neurobiolaging.2009.06.007.
    • Jansen F, Heiming RS, Kloke V, Kaiser S, Palme R, Lesch KP, Sachser N. . ‘Away game or home match: The influence of venue and serotonin transporter genotype on the display of offensive aggression.’ Behavioural Brain Research 219, No. 2: 291–301. doi: 10.1016/j.bbr.2011.01.029.
    • Adrian O, Sachser N. . ‘Diversity of Social and Mating Systems in Cavies: a Review.Journal of Mammalogy 92, No. 1: 39–53. doi: 10.1644/09-MAMM-S-405.1.
    • Nietzer SL, Bonn M, Jansen F, Heiming RS, Lewejohann L, Sachser N, Asan ES, Lesch KP, Schmitt AG. . ‘Serotonin Transporter Knockout and Repeated Social Defeat Stress: Impact on Neuronal Morphology and Plasticity in Limbic Brain Areas.’ Behavioural Brain Research 220, No. 1: 42–54. doi: 10.1016/j.bbr.2011.01.011.
    • Sachser N, Hennessy MB, Kaiser S. . ‘Adaptive Modulation of Behavioural Profiles by Social Stress During Early Phase of Life and Adolescence.’ Neuroscience and Biobehavioral Reviews 35, No. 7: 1518–1533. doi: 10.1016/j.neubiorev.2010.09.002.
    • Herring A, Lewejohann L, Panzer AL, Donath A, Kröll O, Sachser N, Paulus W, Keyvani K. . ‘Preventive and therapeutic types of environmental enrichment counteract beta amyloid pathology by different molecular mechanisms.Neurobiology of Disease 42, No. 3: 530–8.

    • Lewejohann L, Kloke V, Heiming RS, Jansen F, Kaiser S, Schmitt A, Lesch KP, Sachser N. . ‘Social Status and Day-to-Day Behaviour of Male Serotonin Transporter Knockout Mice.’ Behavioural Brain Research 211, No. 2: 220–228. doi: 10.1016/j.bbr.2010.03.035.
    • Jansen F, Heiming RS, Lewejohann L, Touma C, Palme R, Schmitt A, Lesch KP, Sachser N. . ‘Modulation of Behavioural Profile and Stress Response by 5-HTT Genotype and Social Experience in Adulthood.’ Behavioural Brain Research 207, No. 1: 21–29. doi: 10.1016/j.bbr.2009.09.033.
    • Herring A, Blome M, Ambree O, Sachser N, Paulus W, Keyvani K. . ‘Reduction of Cerebral Oxidative Stress Following Environmental Enrichment in Mice with Alzheimer-Like Pathology.’ Brain Pathology 20, No. 1: 166–175. doi: 10.1111/j.1750-3639.2008.00257.x.
    • Lurzel S, Kaiser S, Sachser N. . ‘Social Interaction, Testosterone, and Stress Responsiveness During Adolescence.’ Physiology and Behavior 99, No. 1: 40–46. doi: 10.1016/j.physbeh.2009.10.005.
    • Kaiser S, Krüger C, Sachser N. . ‘The guinea pig.’ In The care and management of laboratory and other research animals, edited by Hubrecht R, Kirkwood J., 380–398. Chichester UK: Wiley-Blackwell. doi: 10.1002/9781444318777.ch27.
    • Heiming RS, Sachser N. . ‘Consequences of Serotonin Transporter Genotype and Early Adversity on Behavioral Profile – Pathology or Adaptation?Frontiers in Neuroscience 4, No. 1: 187. doi: 10.3389/fnins.2010.00187.
    • Sachser N, Kaiser S. . ‘Meerschweinchen als Sozialstrategen.’ SPEKTRUM DER WISSENSCHAFT : 56–63.
    • Sachser N., Kaiser S. . ‘The social modulation of behavioural development.’ In Animal Behaviour: Evolution and Mechanisms, edited by Kappeler P., 505–536. Springer VDI Verlag. doi: 10.1007/978-3-642-02624-9_17.
    • Kaiser S., Sachser N. . ‘Sex-Specific Effects of Early Social Stress in Mammals: A Study in Guinea Pigs.’ In Encyclopedia of Stress, edited by Fink, G, 479–484. Elsevier Inc. doi: 10.1016/B978-012373947-6.00478-5.

    • Kemme K, Kaiser S, von Engelhardt N, Wewers D, Groothuis T, Sachser N. . ‘An Unstable Social Environment Affects Sex Ratio in Guinea Pigs: An Adaptive Maternal Effect?Behaviour 146, No. 11: 1513–1529. doi: 10.1163/156853909X445579.
    • Hennessy MB, Kaiser S, Sachser N. . ‘Social Buffering of the Stress Response: Diversity, Mechanisms, and Functions.’ Frontiers in Neuroendocrinology 30, No. 4: 470–482. doi: 10.1016/j.yfrne.2009.06.001.
    • Lewejohann L, Hoppmann AM, Kegel P, Kritzler M, Kruger A, Sachser N. . ‘Behavioral Phenotyping of a Murine Model of Alzheimer's Disease in a Seminaturalistic Environment Using RFID Tracking.’ Behavior Research Methods 41, No. 3: 850–856. doi: 10.3758/BRM.41.3.850.
    • Glocker ML, Langleben DD, Ruparel K, Loughead JW, Valdez JN, Griffin MD, Sachser N, Gur RC. . ‘Baby Schema Modulates the Brain Reward System in Nulliparous Women.’ Proceedings of the National Academy of Sciences of the United States of America (PNAS) 106, No. 22: 9115–9119. doi: 10.1073/pnas.0811620106.
    • Kaiser S, Sachser N. . ‘Effects of Prenatal Social Stress on Offspring Development: Pathology or Adaptation?Current Directions in Psychological Science 18, No. 2: 118–121. doi: 10.1111/j.1467-8721.2009.01620.x.
    • Diederich K, Schabitz WR, Kuhnert K, Hellstrom N, Sachser N, Schneider A, Kuhn HG, Knecht S. . ‘Synergetic Effects of Granulocyte-Colony Stimulating Factor and Cognitive Training on Spatial Learning and Survival of Newborn Hippocampal Neurons.’ PloS one 4, No. 4: e5303. doi: 10.1371/journal.pone.0005303.
    • Glocker ML, Langleben DD, Ruparel K, Loughead JW, Gur RC, Sachser N. . ‘Baby Schema in Infant Faces Induces Cuteness Perception and Motivation for Caretaking in Adults.’ Ethology 115, No. 3: 257–263. doi: 10.1111/j.1439-0310.2008.01603.x.
    • 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. . ‘The Role of Granulocyte-Colony Stimulating Factor (G-CSF) in the Healthy Brain: A Characterization of G-CSF-Deficient Mice.Journal of Neuroscience 29, No. 37: 11572–11581. doi: 10.1523/JNEUROSCI.0453-09.2009.
    • Lewejohann L, Reefmann N, Widmann P, Ambrée O, Herring A, Keyvani K, Paulus W, Sachser N. . ‘Transgenic Alzheimer Mice in a Semi-Naturalistic Environment: More Plaques, Yet Not Compromised in Daily Life.Behavioural Brain Research 201, No. 1: 99–102. doi: 10.1016/j.bbr.2009.01.037.
    • Herring A, Ambrée O, Tomm M, Habermann H, Sachser N, Paulus W, Keyvani K. . ‘Environmental Enrichment Enhances Cellular Plasticity in Transgenic Mice with Alzheimer-like Pathology.Experimental Neurology 216, No. 1: 184–192. doi: 10.1016/j.expneurol.2008.11.027.
    • Ambrée O, Richter H, Sachser N, Lewejohann L, Dere E, de Souza Silva MA, Herring A, Keyvani K, Paulus W, Schäbitz WR. . ‘Levodopa Ameliorates Learning and Memory Deficits in a Murine Model of Alzheimer's Disease.Neurobiology of Aging 30, No. 8: 1192–1204. doi: 10.1016/j.neurobiolaging.2007.11.010.
    • Herring A, Lewejohann L, Donath A, Sachser N, Paulus W, Keyvani K. . ‘Preventive and therapeutic environmental enrichment counteract A beta pathology by different molecular mechanisms.’ Acta Neuropathologica 118, No. 3: 444–444.
    • Hundelt M, Fath T, Selle K, Oesterwind K, Jordan J, Schultz C, Götz J, von Engelhardt J, Monyer H, Lewejohann L, Sachser N, Bakota R. . ‘Altered Phosphorylation but no Neurodegeneration in a Mouse Model of Tau Hyperphosphorylation.’ Neurobiology of Aging . doi: 10.1016/j.neurobiolaging.2009.06.007.
    • Heiming RS, Jansen F, Lewejohann L, Kaiser S, Schmitt A, Lesch KP and Sachser N. . ‘Living in a dangerous world: the shaping of behavioral profile by early environment and 5-HTT genotype.’ Frontiers in Behavioral Neuroscience 3, No. 26. doi: 10.3389/neuro.08.026.2009.

    • Adrian O, Dekomien G, Epplen JT, Sachser N. . ‘Body Weight and Rearing Conditions of Males, Female Choice and Paternities in a Small Mammal, Cavia Aperea.’ Ethology 114, No. 9: 897–906. doi: 10.1111/j.1439-0310.2008.01548.x.
    • Asher M, Lippmann T, Epplen JT, Kraus C, Trillmich F, Sachser N. . ‘Large Males Dominate: Ecology, Social organization, and Mating System of Wild Cavies, the Ancestors of the Guinea Pig.’ Behavioral Ecology and Sociobiology 62, No. 9: 1509–1521. doi: 10.1007/s00265-008-0580-x.
    • Adrian O, Kaiser S, Sachser N, Jandewerth P, Lottker P, Epplen JT, Hennessy MB. . ‘Female Influences on Pair Formation, Reproduction and Male Stress Responses in a Monogamous Cavy (Galea Monasteriensis).’ Hormones and Behavior 53, No. 3: 403–412. doi: 10.1016/j.yhbeh.2007.11.009.
    • Kemme K, Kaiser S, Sachser N. . ‘Prenatal Stress Does Not Impair Coping with Challenge Later in Life.’ Physiology and Behavior 93, No. 1-2: 68–75. doi: 10.1016/j.physbeh.2007.07.013.
    • Richter H, Ambrée O, Lewejohann L, Herring A, Keyvani K, Paulus W, Palme R, Touma C, Schäbitz WR, Sachser N. . ‘Wheel-Running in a Transgenic Mouse Model of Alzheimer's Disease: Protection or Symptom?Behavioural Brain Research 190, No. 1: 74–84. doi: 10.1016/j.bbr.2008.02.005.
    • Bacher M, Dodel R, Aljabari B, Keyvani K, Marambaud P, Kayed R, Glabe C, Goertz N, Hoppmann A, Sachser N, Klotsche J, Schnell S, Lewejohann L, Al-Abed Y. . ‘CNI-1493 Inhibits Abeta Production, Plaque Formation, and Cognitive Deterioration in an Animal Model of Alzheimer's Disease.Journal of Experimental Medicine 205, No. 7: 1593–1599. doi: 10.1084/jem.20060467.
    • Herring A, Yasin H, Ambrée O, Sachser N, Paulus W, Keyvani K. . ‘Environmental Enrichment Counteracts Alzheimer's Neurovascular Dysfunction in TgCRND8 Mice.Brain Pathology 18, No. 1: 32–39. doi: 10.1111/j.1750-3639.2007.00094.x.
    • Görtz N, Lewejohann L, Tomm M, Ambrée O, Keyvani K, Paulus W, Sachser N. . ‘Effects of Environmental Enrichment on Exploration, Anxiety, and Memory in Female TgCRND8 Alzheimer Mice.Behavioural Brain Research 191, No. 1: 43–48. doi: 10.1016/j.bbr.2008.03.006.
    • Müller Klaus, Sachser Norbert (Eds.): . Theology Meets Biology. Anthropological Perspectives on Animals and Human Beings. Regensburg: Anton Pustet.

    • Kemme K, Kaiser S, Sachser N. . ‘Prenatal Maternal Programming Determines Testosterone Response During Social Challenge.’ Hormones and Behavior 51, No. 3: 387–394. doi: 10.1016/j.yhbeh.2006.12.009.
    • Kaiser S, Harderthauer S, Sachser N, Hennessy MB. . ‘Social Housing Conditions Around Puberty Determine Later Changes in Plasma Cortisol Levels and Behavior.’ Physiology and Behavior 90, No. 2-3: 405–411. doi: 10.1016/j.physbeh.2006.10.002.
    • Kaiser S., Sachser N.,. . ‘Sex-Specific Effects of Early Social Stress in Mammals: A Study in Guinea Pigs.’ In Encyclopedia of stress, edited by Fink G., 479–484. 2nd Ed. Oxford: Academic Press. doi: 10.1016/B978-012373947-6/00478-5.

    • Ambree O, Leimer U, Herring A, Gortz N, Sachser N, Heneka MT, Paulus W, Keyvani K. . ‘Reduction of Amyloid Angiopathy and A Beta Plaque Burden After Enriched Housing in TgCRND8 Mice - Involevement of Multiple Pathways.’ American Journal of Pathology 169, No. 2: 544–552. doi: 10.2353/ajpath.2006.051107.
    • Ambree O, Touma C, Gortz N, Keyvani K, Paulus W, Palme R, Sachser N. . ‘Activity Changes and Marked Stereotypic Behavior Precede A Beta Pathology in TgCRND8 Alzheimer Mice.’ Neurobiology of Aging 27, No. 7: 955–964. doi: 10.1016/j.neurobiolaging.2005.05.009.
    • Hennessy MB, Hornschuh G, Kaiser S, Sachser N. . ‘Cortisol Responses and Social Buffering: A Study Throughout the Life Span.’ Hormones and Behavior 49, No. 3: 383–390. doi: 10.1016/j.yhbeh.2005.08.006.
    • Lewejohann L, Reinhard C, Schrewe A, Brandewiede J, Haemisch A, Gortz N, Schachner M, Sachser N. . ‘Environmental Bias? Effects of Housing Conditions, Laboratory Environment and Experimenter on Behavioral Tests.’ Genes, Brain and Behavior 5, No. 1: 64–72. doi: 10.1111/j.1601-183X.2005.00140.x.
    • Hennessy MB, Bullinger KL, Neisen G, Kaiser S, Sachser N. . ‘Social Organization Predicts Nature of Infant-Adult Interactions in Two Species of Wild Guinea Pigs (Cavia aperea and Galea Monasteriensis).’ Journal of Comparative Psychology 120, No. 1: 12–18. doi: 10.1037/0735-7036.120.1.12.
    • Kritzler M, Lewejohann L, Krüger A, Raubal M, Sachser N. . ‘An RFID-based Tracking System for Laboratory Mice in a Semi-Natural Environment.’.
    • Stefanski V, Sachser N, Holst v D,. . „Sozialer Stress, Verhalten, Immunsystem und Krankheit.“ In Lehrbuch der klinischen Pathophysiologie komplexer chronischer Erkrankungen, herausgegeben von Straub RH, 221–233. 1st Ed. Göttingen: Vandenhoeck & Ruprecht.
    • Stock C, Sachser N,. . „Humanbiologische Grundlagen der Gesundheitswissenschaften.“ In Handbuch der Gesundheitswissenschaften, herausgegeben von Hurrelmann K, Laaser U, Razum O, 93–116. 4th Ed. Weinheim, München: Beltz Juventa.

    • Schwarze-Eicker KA, Keyvani K, Gortz N, Westaway D, Sachser N, Paulus W. . ‘Prion Protein (PrPc) Promotes Beta-Amyloid Plaque Formation.’ Neurobiology of Aging 26, No. 8: 1177–1182. doi: 10.1016/j.neurobiolaging.2004.10.004.
    • Kaiser S, Sachser N. . ‘The Effects of Prenatal Social Stress on Behaviour: Mechanisms and Function.’ Neuroscience and Biobehavioral Reviews 29, No. 2: 283–294. doi: 10.1016/j.neubiorev.2004.09.015.
    • Wewers D, Kaiser S, Sachser N. . ‘Application of an Antiandrogen During Pregnancy Infantilizes the Male Offsprings' Behaviour.’ Behavioural Brain Research 158, No. 1: 89–95. doi: 10.1016/j.bbr.2004.08.009.
    • Adrian O, Brockmann I, Hohoff C, Sachser N. . ‘Paternal Behaviour in Wild Guinea Pigs: A Comparative Study in Three Closely Related Species With Different Social and Mating Systems.’ Journal of Zoology 265, No. 1: 97–105. doi: 10.1017/S0952836904006090.
    • Carter CS, Ahnert L, Grossmann K, Hrdy SB, Lamb ME, Porges SW, Sachser N et al. (Eds.): . Attachment and Bonding: A New Synthesis. Cambridge: MIT Press.
    • Pedersen CA, Ahnert L, Anzenberger G, Belsky J, Draper P, Fleming AS, Grossmann K, Sachser N, Sommer S, Tietze DP, Young LJ,. . ‘Beyond Infant Attachment: The Origins of Bonding Later in Life.’ In Attachment and Bonding: A New Synthesis, edited by Carter S.C., Ahnert L., Grossmann K., Hrdy S.B., Lamb M.E., Porges S.W., Sachser N., 385–427. 1st Ed. Cambridge: MIT Press.
    • Sachser N.,. . ‘Adult Social Bonding: Insights from Studies in Non-Human Mammals.’ In Attachment and Bonding: A New Synthesis, edited by Carter S.C., Ahnert L., Grossmann K., Hrdy S.B., Lamb M.E., Porges S.W., Sachser N., 119–135. Cambridge: MIT Press.

    • Prior H, Schwegler H, Marashi V, Sachser N. . ‘Exploration, Emotionality, and Hippocampal Mossy Fibers in Nonaggressive AB/Gat and Congenic Highly Aggressive Mice.’ Hippocampus 14, No. 1: 135–140. doi: 10.1002/hipo.10166.
    • Marashi V, Barnekow A, Sachser N. . ‘Effects of Environmental Enrichment on Males of a Docile Inbred Strain of Mice.’ Physiology and Behavior 82, No. 5: 765–776. doi: 10.1016/j.physbeh.2004.05.009.
    • 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. . ‘Role of a Neuronal Small Non-Messenger RNA: Behavioural Alterations in BC1 RNA-Deleted Mice.’ Behavioural Brain Research 154, No. 1: 273–289. doi: 10.1016/j.bbr.2004.02.015.
    • Touma C, Ambree O, Gortz N, Keyvani K, Lewejohann L, Palme R, Paulus W, Schwarze-Eicker K, Sachser N. . ‘Age- and Sex-Dependent Development of Adrenocortical Hyperactivity in a Transgenic Mouse Model of Alzheimer's Disease.’ Neurobiology of Aging 25, No. 7: 893–904. doi: 10.1016/j.neurobiolaging.2003.09.004.
    • Sachser N. . „Curiosity, playing, and learning: Behavioral-biological annotations on childhood.“ Zeitschrift für Pädagogik 50, No. 4: 475–486.
    • Asher MR, De Oliveira ES, Sachser N. . ‘Social System and Spatial Organization of Wild Guinea Pigs (Cavia Aperea) in a Natural Low Density Population.’ Journal of Mammalogy 85, No. 4: 788–796. doi: 10.1644/BNS-012.
    • Keyvani K, Sachser N, Witte OW, Paulus W. . ‘Gene Expression Profiling in the Intact and Injured Brain Following Environmental Enrichment.’ Journal of Neuropathology and Experimental Neurology 63, No. 6: 598–609. doi: 10.1016/j.neulet.2005.05.016.
    • Trillmich F, Kraus C, Kunkele J, Asher M, Clara M, Dekomien G, Epplen JT, Saralegui A, Sachser N. . ‘Species-Level Differentiation of Two Cryptic Species Pairs of Wild Cavies, Genera Cavia and Galea, with a Discussion of the Relationship Between Social Systems and Phylogeny in the Caviinae.’ Canadian Journal of Zoology 82, No. 3: 516–524. doi: 10.1139/z04-010.
    • Touma C, Palme R, Sachser N. . ‘Analyzing Corticosterone Metabolites in Fecal Samples of Mice: A Noninvasive Technique to Monitor Stress Hormones.’ Hormones and Behavior 45, No. 1: 10–22. doi: 10.1016/j.yhbeh.2003.07.002.
    • Sachser N, Künzl C, Kaiser S,. . ‘The Welfare of Laboratory Guinea Pigs.’ In The Welfare of Laboratory Animals, edited by Kalista E, 181–209. Dordrecht, The Netherlands: Kluwer Academic.
    • Sachser N. . „Neugier, Spiel und Lernen: Verhaltensbiologische Anmerkungen zur Kindheit.“ Zeitschrift für Pädagogik 50, No. 4: 475–486.
    • Solmsdorff K, Kock D, Hohoff C, Sachser N. . ‘Comments of the Genus Gelea Meyen 1833 with Description of Gelea Monasteriensis n.sp. from Bolivia (Mammalia, Rodentia, Caviidae).’ Senckenbergiana biologica , No. 84 (1/2): 137–156.
    • Solmsdorff K, Kock D, Hohoff C, Sachser N. . ‘Comments on the genus Galea MEYEN 1833 with description of Galea monasteriensis n. sp. from Bolivia (Mammalia, Rodentia, Caviidae).’ Senckenbergiana biologica 84, No. 1-2: 137–156.

    • Kaiser S, Nubold T, Rohlmann I, Sachser N. . ‘Pregnant Female Guinea Pigs Adapt Easily to a New Social Environment Irrespective of their Hearing Conditions.’ Physiology and Behavior 80, No. 1: 147–153. doi: 10.1016/S0031-9384(03)00228-2.
    • Skryabin BV, Sukonina V, Jordan U, Lewejohann L, Sachser N, Muslimov I, Tiedge H, Brosius J. . ‘Neuronal Untranslated BC1 RNA: Targeted Gene Elimination in Mice.’ Molecular and Cellular Biology 23, No. 18: 6435–6441. doi: 10.1128/MCB.23.18.6435-6441.2003.
    • Kaiser S, Kruijver FPM, Swaab DF, Sachser N. . ‘Early Social Stress in Female Guinea Pigs Induces a Masculinization of Adult Behavior and Corresponding Changes in Brain and Neuroendocrine Function.’ Behavioural Brain Research 144, No. 1-2: 199–210. doi: 10.1016/S0166-4328(03)00077-9.
    • Kaiser S, Kruijver FPM, Straub RH, Sachser N, Swaab DF. . ‘Early Social Stress in Male Guinea-Pigs Changes Social Behaviour, and Autonomic and Neuroendocrine Functions.’ Journal of Neuroendocrinology 15, No. 8: 761–769. doi: 10.1046/j.1365-2826.2003.01055.x.
    • Kaiser S, Kirtzeck M, Hornschuh G, Sachser N. . ‘Sex-Specific Difference in Social Support - a Study in Female Guinea Pigs.’ Physiology and Behavior 79, No. 2: 297–303. doi: 10.1016/S0031-9384(03)00091-X.
    • Hohoff C, Franzen K, Sachser N. . ‘Female Choice in a Promiscuous Wild Guinea Pig, the Yellow-Toothed Cavy (Galea Musteloides).’ Behavioral Ecology and Sociobiology 53, No. 6: 341–349. doi: 10.1007/s00265-002-0569-9.
    • Wewers D, Kaiser S, Sachser N. . ‘Maternal Separation in Guinea-Pigs: A Study in Behavioural Endocrinology.’ Ethology 109, No. 5: 443–453. doi: 10.1046/j.1439-0310.2003.00888.x.
    • Marashi V, Barnekow A, Ossendorf E, Sachser N. . ‘Effects of Different Forms of Environmental Enrichment on Behavioral, Endocrinological, and Immunological Parameters in Male Mice.’ Hormones and Behavior 43, No. 2: 281–292. doi: 10.1016/S0018-506X(03)00002-3.
    • Touma C, Sachser N, Mostl E, Palme R. . ‘Effects of Sex and Time of Day on Metabolism and Excretion of Corticosterone in Urine and Feces of Mice.’ General and Comparative Endocrinology 130, No. 3: 267–278. doi: 10.1016/S0016-6480(02)00620-2.
    • Kunzl C, Kaiser S, Meier E, Sachser N. . ‘Is A Wild Mammal Kept and Reared in Captivity Still a Wild Animal?Hormones and Behavior 43, No. 1: 187–196. doi: 10.1016/S0018-506X(02)00017-X.
    • Kaiser S, Heemann K, Straub RH, Sachser N. . ‘The Social Environment Affects Behaviour and Androgens, But Not Cortisol in Pregnant Female Guinea Pigs.’ Psychoneuroendocrinology 28, No. 1: 67–83. doi: 10.1016/S0306-4530(02)00010-0.
    • Knierim U, Hesse D, von Borell E, Herrmann HJ, Müller C, Rauch HW, Sachser N, Zerbe F. . ‘Minimum Standards for Voluntary Animal Welfare Assessment of Mass-Produced Farm Animal Housing Equiment.’ Animal Welfare 12, No. 1: 75–84.
    • Sachser N,. . „Soziale Umwelt, Verhalten und Stress: Erkenntnisse der modernen Verhaltensbiologie.“ In Pädagogisch-anthropologische Perspektiven, herausgegeben von Liebau E, Peskoller H, Wulf C, 137–148. Weinheim, Basel, Berlin: Beltz Verlag.

    • Hohoff C, Solmsdorff K, Lottker P, Kemme K, Epplen JT, Cooper TG, Sachser N. . ‘Monogamy in a New Species of Wild Guinea Pigs (Galea sp.).’ Naturwissenschaften 89, No. 10: 462–465. doi: 10.1007/s00114-002-0355-6.
    • Illies I, Muhlen W, Ducker G, Sachser N. . ‘The Influence of Different Bee Traps on Undertaking Behaviour of the Honey Bee (Apis Mellifera) and Development of a New Trap.’ Apidologie 33, No. 3: 315–326. doi: 10.1051/apido:2002014.

    • Kaiser S, Sachser N. . ‘Social Stress During Pregnancy and Lactation Affects in Guinea Pigs the Male Offsprings' Endocrine Status and Infantilizes their Behaviour.’ Psychoneuroendocrinology 26, No. 5: 503–519. doi: 10.1016/S0306-4530(01)00009-9.
    • Touma C, Palme R, Sachser N. . ‘Different Types of Oestrous Cycle in Two Closely Related South American Rodents (Cavia Aperea and Galea Musteloides) with Different Social and Mating Systems.’ Reproduction 121, No. 5: 791–801. doi: 10.1530/rep.0.1210791.
    • Knierim U, Carter CS, Fraser D, Gärtner K, Lutgendorf SK, Mineka S, Panksepp J, Sachser N,. . ‘Good Welfare: Improving Quality of Life.’ In Coping with Challenge: Welfare in Animals Including Humans, edited by Broom DM, 79–100. Berlin: Selbstverlag / Eigenverlag / Self-publishing .
    • Sachser N.,. . ‘What is Important to Achieve Good Welfare in Animals?’ In Coping with challenge: welfare in animals including humans, edited by Broom DM, 31–48. Berlin: Selbstverlag / Eigenverlag / Self-publishing .
    • Kaiser S, Sachser N. . „Stress und Wohlergehen.“ Praxis der Naturwissenschaften: Biologie in der Schule 50, No. 5: 15–20.
    • Kalthoff A, Schmidt C, Sachser N. . „Der Einfluss von Zoobesuchern auf das Verhalten und die Speichel-Corticosteronkonzentrationen von Zootieren.“ In Aktuelle Arbeiten zur artgemäßen Tierhaltung 2000, 104–112. Darmstadt: Landwirtschaftsverlag.
    • Sachser N. . „Wechselwirkungen - Verhaltensbiologische Anmerkungen zur Natur des Menschen.“ FORSCHUNG UND LEHRE , No. 10: 10–11.

    • Kaiser S, Brendel H, Sachser N. . ‘Effects of ACTH Applications During Pregnancy on the Female Offsprings' Endocrine Status and Behavior in Guinea Pigs.’ Physiology and Behavior 70, No. 1-2: 157–162. doi: 10.1016/S0031-9384(00)00248-1.
    • Cooper TG, Weydert S, Yeung CH, Kunzl C, Sachser N. . ‘Maturation of epididymal spermatozoa in the nondomesticated guinea pigs Cavia aperea and Galea musteloides.’ Journal of Andrology 21, No. 1: 154–163.
    • Hesse D, Knierim U, von Borell E, Herrmann HJ, Koch L, Müller C, Rauch HW, Sachser N, Zerbe F. . „Tiergerechtheit auf dem Prüfstand - Anforderungen an freiwillige Prüfverfahren gemäß §13a TierschG.“ In Merkblatt der Deutschen Landwirtschaftlichen Gesellschaft e.V., 1–16. 321th Ed. .
    • Lewejohann L, Sachser N. . „Präferenztests zur Beurteilung unterschiedlicher Haltungsbedingungen von männlichen Labormäusen.“ In Aktuelle Arbeiten zur artgemäßen Tierhaltung 1999, 170–177. Darmstadt: KTBL Schrift.
    • Wölbing O, Asher M, Bishr Y, Kuhn W, Sachser N. . ‘Applying GIS for Investigations in Behavioural Biology.’ In Angewandte Geographische Informationsverarbeitung XII, Beiträge zum AGIT-Symposium Salzburg 200, edited by Strobl J, Blaschke T, Griesebner G, 520–528. Heidelberg: Herbert Wichmann-Verlag.

    • Keil A, Epplen JT, Sachser N. . ‘Reproductive Success of Males in the Promiscuous-Mating Yellow-Toothed Cavy (Galea Musteloides).’ Journal of Mammalogy 80, No. 4: 1257–1263. doi: 10.2307/1383176.
    • Sachser N, Schwarz-Weig E, Keil A, Epplen JT. . ‘Behavioural Strategies, Testis Size, and Reproductive Success in Two Caviomorph Rodents with Different Mating Systems.’ Behaviour 136: 1203–1217. doi: 10.1163/156853999501720.
    • Künzl C, Sachser N. . ‘The Behavioral Endocrinology of Domestication: A Comparison Between the Domestic Guinea Pig (Cavia Aperea f. Porcellus) and its Wild Ancestor, the Cavy (Cavia Aperea).Hormones and Behavior 35, No. 1: 28–37. doi: 10.1006/hbeh.1998.1493.
    • Hesse D, Knierim U, von Borell E, Herrmann HJ, Koch L, Müller C, Rauch HW, Sachser N, Schwabenbauer K, Zerbe F. . „Freiwilliges Prüfverfahren für Stalleinrichtungen entsprechend dem novellierten Tierschutzgesetz von 1998.“ Deutsche Tierärztliche Wochenschrift 106: 138–141.
    • Kaiser S, Classen D, Sachser N. . „Auswirkungen unterschiedlicher struktureller Anreicherungen auf das Spontanverhalten weiblicher Labormäuse (Stamm NMRI).“ In Aktuelle Arbeiten zur artgemäßen Tierhaltung 1998, 56–62. Darmstadt: KTBL Schrift 382.
    • Künzl C, Meier E, Sachser N. . „Ist ein Wildmeerschweinchen in Menschenhand noch ein Wildtier?In Aktuelle Arbeiten zur artgemäßen Tierhaltung 1998, 107–114. Darmstadt: KTBL Schrift 382.

    • Sachser N, Dürschlag M, Hirzel D. . ‘Social Relationships and the Management of Stress.Psychoneuroendocrinology 23, No. 8: 891–904. doi: 10.1016/S0306-4530(98)00059-6.
    • Sachser N. . ‘Of Domestic and Wild Guinea Pigs: Studies in Sociophysiology, Domestication, and Social Evolution.Naturwissenschaften 85, No. 7: 307–317. doi: 10.1007/s001140050507.
    • Kaiser S, Sachser N. . ‘The Social Environment During Pregnancy and Lactation Affects the Female Offsprings' Endocrine Status and Behaviour in Guinea Pigs.Physiology and Behavior 63, No. 3: 361. doi: 10.1016/S0031-9384(97)00435-6.
    • Kail A, Sachser N. . ‘Reproductive Benefits from Female Promiscuous Mating in a Small Mammal.’ Ethology 104, No. 11: 897–903. doi: 10.1111/j.1439-0310.1998.tb00039.x.

    • Sachser N, Kaiser S. . ‘The Social Environment, Behaviour and Stress - a Case Study in Guinea Pigs.’ Acta physiologica Scandinavica. Supplementum 161: 83–87.

    • Sachser N, Kaiser S. . ‘Prenatal Social Stress Masculinizes the Females' Behaviour in Guinea Pigs.Physiology and Behavior 60, No. 2: 589. doi: 10.1016/S0031-9384(96)80036-9.

    • Prior H, Sachser N. . ‘Effects of Enriched Housing Environment on the Behaviour of Young Male and Female Mice in Four Exploratory Tasks.’ Journal of Experimental Animal Science 37: 57–68.

    • Sachser N, Lick C, Stanzel K. . ‘The Environment, Hormones, and Aggressive Behaviour: a 5-Year-Study in Guinea Pigs.Psychoneuroendocrinology 19, No. 5-7: 697–707. doi: 10.1016/0306-4530(94)90051-5.
    • Sachser N.,. . ‘Social stratification and health in non-human mammals - a case study in guinea pigs.’ In Reproductive and Interpersonal Aspects of Dominance and Status, edited by Ellis L., 113–121. Westport: Praeger.
    • Sachser N. (Hrsg.): . Sozialphysiologische Untersuchungen an Hausmeerschweinchen. Gruppenstrukturen, soziale Situation und Endokrinium, Wohlergehen. Hamburg und Berlin: Paul Parey Verlag.

    • Sachser N. . ‘The ability to arrange with conspecifics depends on social experiences around puberty.Physiology and Behavior 53, No. 3: 539.

    • Sachser N, Lick C. . ‘Social experience, behavior, and stress in guinea pigs.Physiology and Behavior 50, No. 1: 83–90.

    • Sachser N.,. . ‘Social organization, social status, behavioral strategies and endocrine responses in male guinea pigs.’ In Hormones, Brain and Behaviour in Vertebrates, edited by Balthazart L., 176–187. Basel: Karger.

    • West-Eberhardt M.J., Bradbury J.W., Davies N.B., Gouyon P.-H., Hammerstein P., König B., Parker G.A., Queller D.C., Sachser N., Slagsvold T., Trillmich F., Vogel C.,. . ‘Conflicts between and within the sexes in sexual selection.’ In Sexual selection: Testing the alternatives, edited by Bradbury J.W., Andersson M.B., 180–195. Chinchester: John Wiley & Sons.