Helena Kontecka

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The aim of the study was to analyse egg quality changes of Japanese quail during the reproductive season and after several days of storage. A significantly higher egg weight was recorded in week 9 than in week 25 and week 31 of age ofbirds. The egg specific gravity value of eggs also decreased with the age of quails. The smallest yolk weight and its(More)
The aim of this study was to investigate the number of the embryo blastodermal cells and hatchability of pheasant from eggs of different eggshell colours depending on the length of the storage period before hatching. On the day of collection, dark-brown and olive eggs were characterised by a similar and significantly higher (by about 48%) number of embryo(More)
The tongue in domestic duck, as in other Anseriformes, is characterized by wide variety of shape and mechanical papillae and they fulfill different function during food collection. The present work aims to describe morphological features of the tongue as well as the pace formation of the mechanical papillae during embryonic period. The results may allow to(More)
The aim of the performed investigations was to compare eggs of Japanese quail layers of different weights with regard to their shape, selected traits of the content following various times of their storage as well as the results of hatchability and body weight of one-day old chicks. Hatching eggs were divided into four groups: group S – up to 10.50 g, group(More)
The aim of the investigation was to ascertain the influence of different doses of vitamin C injected at selected dates of incubation into the eggs of broiler breeders and Pekin ducks on hatchability. The injected vitamin C doses were administered into the air cell on the 13th, 15th and 17th days (3 and 6 mg--chickens) and on the 12th and 20th days (4 and 8(More)
The aim ofthe study was to assess laying traits, the weight of eggs and characters ofthe 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(More)
Pheasant eggs of different colors differ with regard to physical properties. This study was conducted to ascertain the intensity of infestation by microscopic fungi based on egg color. Settling intensity by microscopic fungi of pheasant egg shells and the content of eggs of different color during a 7-d storage period was investigated. The content of(More)
Although the growth of pheasants is an important issue, there are few publications providing information on body weight and morphometrics of pheasants at different ages. The aim of this study was to investigate body weight, tarsus length, wing length and wingspan in farmed pheasants aged 3-16 weeks. The study was carried out on 50 pheasants (31 females and(More)
The aim of this study was to evaluate the effectiveness of ethyl alcohol (75%) disinfection of Japanese quail (Coturnix coturnix japonica) hatching eggs and analysis of microbial contamination of eggs during incubation, depending on their location in the setter. Disinfected eggshells were found to have lower total bacteria (TBC) and fungi (TFC) count.(More)
The experimental material comprised 7 ostrich families (7 males and 14 females) of which five families were at the age of 7 and two at the age of 5 years. In the course of the entire reproductive season, the following parameters were analysed: length of the laying period, mean laying rate, number of eggs laid by one female, proportion ofhatching eggs, egg(More)