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Josefina Zidar

Josefina Zidar
Josefina Zidar is a doctor in ethology and her research focuses on early experiences and their effects on animal welfare later in life. She is primarily interested in how positive experiences can contribute to positive welfare. She is also interested in fundamental questions about animal personality, emotions and cognition.


Josefina Zidar has a PhD in ethology from Linköping University where she studied personality and cognition in red junglefowl. She has previous experience from work with animal welfare issues as an administrator at the Swedish 3R's Centre and the Swedish Center for Animal Welfare. She is a researcher in animal welfare at the department of applied animal science and welfare at SLU.


Josefina is project manager for the PosHen project that focuses on improving the rearing environment for laying hens. You can read more about the project here:

PosHen project


Selected publications

Weber EM, Zidar J, Ewaldsson B, Askevik K, Udén E, Svensk E, Törnqvist E. Aggression in Group-Housed Male Mice: A Systematic Review. Animals. 2023; 13(1):143.

Lagisz M, Zidar J, Nakagawa S, Paul ES, Bateson M, Mendl M, Løvlie H. 2020. Optimism, pessimism and judgement bias in animals: A systematic review and meta-analysis. Neuroscience & Biobehavioral Reviews, 118, 3-17.

Zidar J, Weber E, Ewaldsson B, Tjäder S, Lilja J, J Mount J, Svensson C, Svensk E, Udén E, Törnqvist E. 2019. Group and Single Housing of Male Mice: Collected Experiences from Research Facilities in Sweden. Animals, 9, 1010. doi:10.3390/ani9121010

Neville V, Nakagawa S, Zidar J, Paul ES, Lagisz M, Bateson M, Løvlie H, Mendl M. 2020. Pharmacological manipulations of judgement bias: a systematic review and meta-analysis. Neuroscience & Biobehavioral Reviews, 108, 269-286.

Zidar J, Balogh A, Leimar O, Løvlie H. 2019. Generalization to a novel cue covaries with behavioral flexibility in red junglefowl chicks. Behavioural Ecology 30(5), 1375–1381.

Zidar J, Balogh A, Favati A, Jensen P, Leimar O, Løvlie H. 2018. The relationship between learning speed and personality is age- and task-dependent in red junglefowl. Behavioral Ecology and Sociobiology 72(10): 168.  

Sorato E, Zidar J, Garnham L, Wilson A, Løvlie H. 2018. Heritabilities and co-variation among cognitive traits in red junglefowl. Philosophical Transactions of the Royal Society of London. Biological Sciences 373(1756): 20170285.

Zidar J, Campderrich I, Jansson E, Wichman A, Winberg S, Keeling L, Løvlie H. 2018. Environmental complexity buffers against stress-induced negative judgement bias in female chickens. Scientific Reports 8(1): 5404.

Zidar, Josefina. The relationship between personality and cognition in the fowl, Gallus gallus. Dissertation No. 1818. Datum 22/09/2017. Ämnesområde Etologi

Zidar J, Balogh A, Favati A, Jensen P, Leimar O, Løvlie H. 2017. A comparison of animal personality and coping styles in the red junglefowl. Animal Behaviour 130: 209-220.

Zidar J, Sorato E, Malmqvist A-M, Jansson E, Rosher C, Jensen J, Favati A, Lovlie H. 2017. Early experience affects adult personality in the red junglefowl: a role for cognitive stimulation? Behavioural processes 134: 78-86.

Favati A, Zidar J, Thorpe H, Jensen P and Løvlie H. 2015. The ontogeny of personality traits in red junglefowl, Gallus gallus. Behavioural Ecology 27(2): 484-493.

Løvlie, H. Zidar, J and Berneheim C. 2014. A cry for help: female distress calling during copulation in context dependent. Animal Behaviour92: 151-157.

Zidar J. and Løvlie, H. 2012. Scent of the enemy: behavioural responses to predator faecal odour in the fowl. Animal Behaviour. Animal Behaviour84(3): 547-554.