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The aim of the study was to assess laying traits, the weight of eggs and characters of the laying rhythm of pheasants in the first and second years of reproduction. Pheasants (10 cockerels and 50 hens) were kept in aviaries. Daily, individual control of laying was performed beginning with the day of the first laying and ending with the last egg. The following parameters were evaluated: age at first...
A total of 990 ring-necked pheasant hatching eggs were examined in relation to their shell colour –dark-brown, light-brown, olive, blue. Eggshell thickness, water vapour conductance and number of pores per 0,25 cm2 of eggshell were analysed in 285 eggs. Moreover, shell ultrastructure was examined of six eggs of each colour and three incubation sets were carried out with 681 eggs. Shells of blue eggs...
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