User profiles for Patrick J. Tkaczynski

Patrick J Tkaczynski

Lecturer at Liverpool John Moores University
Verified email at ljmu.ac.uk
Cited by 514

[HTML][HTML] Social thermoregulation as a potential mechanism linking sociality and fitness: Barbary macaques with more social partners form larger huddles

LAD Campbell, PJ Tkaczynski, J Lehmann, M Mouna… - Scientific reports, 2018 - nature.com
Individuals with more or stronger social bonds experience enhanced survival and reproduction
in various species, though the mechanisms mediating these effects are unclear. Social …

Systematic mapping of developmental milestones in wild chimpanzees

AC Bründl, PJ Tkaczynski… - Developmental …, 2021 - Wiley Online Library
Postnatal development is protracted relative to lifespan in many primates, including modern
humans (Homo sapiens), facilitating the acquisition of key motor, communication and social …

Early maternal loss leads to short-but not long-term effects on diurnal cortisol slopes in wild chimpanzees

C Girard-Buttoz, PJ Tkaczynski, L Samuni, P Fedurek… - Elife, 2021 - elifesciences.org
The biological embedding model (BEM) suggests that fitness costs of maternal loss arise
when early-life experience embeds long-term alterations to hypothalamic-pituitary-adrenal (…

Behavioral responses to injury and death in wild Barbary macaques (Macaca sylvanus)

…, PJ Tkaczynski, M Mouna, M Qarro, J Waterman… - Primates, 2016 - Springer
The wounding or death of a conspecific has been shown to elicit varied behavioral responses
throughout thanatology. Recently, a number of reports have presented contentious …

[HTML][HTML] Patterns of urinary cortisol levels during ontogeny appear population specific rather than species specific in wild chimpanzees and bonobos

PJ Tkaczynski, V Behringer, CY Ackermann… - Journal of Human …, 2020 - Elsevier
… Author links open overlay panel Patrick J. Tkaczynski a b , Verena Behringer a c , Corinne
Y. Ackermann d , Pawel Fedurek e , Barbara Fruth f g , Cédric Girard-Buttoz a b , Catherine …

The function of chimpanzee greeting calls is modulated by their acoustic variation

P Fedurek, PJ Tkaczynski, C Hobaiter, K Zuberbühler… - Animal Behaviour, 2021 - Elsevier
Signalling plays an important role in mediating social interactions in many animal species.
For example, during approaches certain species produce ‘greetings’, which can take the form …

Long-term repeatability in social behaviour suggests stable social phenotypes in wild chimpanzees

PJ Tkaczynski, A Mielke, L Samuni… - Royal Society …, 2020 - royalsocietypublishing.org
Consistent individual differences in social phenotypes have been observed in many animal
species. Changes in demographics, dominance hierarchies or ecological factors, such as …

Measuring personality in the field: An in situ comparison of personality quantification methods in wild Barbary macaques (Macaca sylvanus).

PJ Tkaczynski, C Ross, A MacLarnon… - Journal of …, 2019 - psycnet.apa.org
… Correspondence concerning this article should be addressed to Patrick J. Tkaczynski,
Department of Primatology, Max Planck Institute of Evolutionary Anthropology, Deutscher Platz 6, …

[HTML][HTML] Shared community effects and the non-genetic maternal environment shape cortisol levels in wild chimpanzees

PJ Tkaczynski, F Mafessoni, C Girard-Buttoz… - Communications …, 2023 - nature.com
Mechanisms of inheritance remain poorly defined for many fitness-mediating traits, especially
in long-lived animals with protracted development. Using 6,123 urinary samples from 170 …

Behavioural thermoregulation via microhabitat selection of winter sleeping areas in an endangered primate: implications for habitat conservation

LAD Campbell, PJ Tkaczynski… - Royal Society …, 2018 - royalsocietypublishing.org
Strategic microhabitat selection allows animals in seasonally cold environments to reduce
homeostatic energy costs, particularly overnight when thermoregulatory demands are greatest…