Review

Role of thyroid hormones in birds in the light of recent knowledge
Kinga Kowalik Andrzej Sechman
149-164
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Identification and health-promoting properties of milk containing A2 beta casein
Iwona Radkowska
165-177
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Application potential of cloning goats by somatic cell nuclear transfer in agriculture, transgenics, agri-food biotechnology, biomedicine and biopharmaceutical industry
Maria Skrzyszowska Marcin Samiec
179-197
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Animal genetics and breeding

Fattening performance of Polish Landrace pigs and possibilities of its improvement through breeding work
Grzegorz Żak Aurelia Mucha
199-213
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Comparison of three successive reproductive cycles of sows for fatness changes and reproductive performance
Robert Eckert
215-224
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Boer goats in Poland – analysis of the state of breeding and characterization of selected performance parameters over the last decade
Aldona Kawęcka Marta Pasternak
225-234
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The biology, physiology, reproduction, and health

Cell membrane integrity and sperm chromatin structure of sexed and unsexed bull semen
Piotr Gogol Monika Trzcińska
235-244
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Effect of glutamic acid in vitro on the secretion of glucocorticoids by the adrenal glands of rabbits (Oryctolagus cuniculus) – preliminary studies
Izabela Szpręgiel Danuta Wrońska Sylwia Pałka Bogdan F. Kania
245-256
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Behaviour, well-being, production technology, and environment

An analysis of horse stereotypies during social isolation
Ewelina Tkaczyk Beata Kaczmarek Martyna Mierzicka Martyna Frątczak Dominika Dybczyńska
257-265
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