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1

Size does not matter – no evidence for assortative mating by body size in the Mute Swan Cygnus olor

100%
Wlodarczyk R., Minias P., Janiszewski T.
Polish Journal of Ecology
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2016
|
tom 64
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nr 2
Finding a mate of high quality is of key importance for reproducing birds, and thus positive assortative mating is commonly observed in avian populations. Although assortative mating by age, body size, condition or ornamental traits was reported for many bird taxa, there is a scarcity of empirical evidence for such mating patterns in wildfowl. We studied mating patterns in the Mute Swan Cygnus olor from the Central-European population. We analysed four body measurements (total wing length, forearm length, head length, foot web width) in 91 different breeding pairs. Contrary to our expectations, we found no evidence for assortative mating by any of the collected biometrical measurements and by overall structural size (PC1 from all measured skeletal traits). Further, Mute Swans mated randomly by the size of bill knob, which is considered a sexually selected ornament in this species. We suggest that in the species with long-term pair bonds and monogamous breeding system, such as the Mute Swan, the benefits from large size of mates may be less important for positive reproductive output than other individual traits, e.g., age or previous breeding experience.
2

Effect of the origin of quails on their utility type and selected egg quality traits

84%
Tarasewicz Z., Szczerbinska D., Ligocki M., Danczak A., Majewska D., Kurzawa J.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2004
|
tom 07
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nr 2
The study was aimed at determining the effect of quail origin on their utility and egg quality traits. Young quails were reared at own farm under most favorable microclimate conditions using the standard feeding adapted to particular rearing stages. In the fifth week of life, the quails were weighted and three groups were formed for Pharaoh breed and White and Golden varieties, 24 birds each. Adult birds were kept in cages as before using standard microclimate parameters and 17 hours long light day. The feeding was based on whole-meal feed mix with nutritive value consistent with recommended poultry feeding standards. In the 18th week of life of the laying quails, 20 eggs of each group were collected to evaluate their quality traits. The effect of quail origin on laying rate and feed consumption converted to one egg was found.
3

Effects of chitosan on selected production characteristics and hatching success of the Pharaoh quail

84%
Tarasewicz Z., Balicka-Ramisz A., Szczerbinska D., Danczak A., Ramisz A., Pilarczyk B.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2003
|
tom 06
|
nr 2
Chitosan is the simplest form of chitin, found in carapaces of crabs, prawns, and krill. Due to its chemical and physical properties and biological activity, chitosan is widely applied in, i.a., medicine, animal care, and agriculture. Chitosan effects on poultry health and production have been studied to a limited degree only. The present study was thus aimed at elucidating chitosan effects on the utility and reproduction-related characteristics of quail. The experiment involved the quail aged 5 weeks which were divided into two groups, each consisting of 36 females and 12 males. The birds belonging to Group I (control) were fed a standard feed mix for laying quail, while the feed offered to Group II (experimental) was enriched with 5.2 ml chitosan added to 1.2 kg feed. Compared to the control, the experimental quail showed a lower daily feed consumption, lower number of eggs laid, and a higher feed consumption per egg.
4

Hatchability of emu [Dromaius novaehollandiae] eggs in relation to incubation temperature

84%
Szczerbinska D., Majewska D., Tarasewicz Z., Danczak A., Ligocki M.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2003
|
tom 06
|
nr 2
The aim of the study was to assess an effect of incubation temperature (36.4, 36.7, and 37.1°C) on hatching performance of emu. The fewest dead embryos (13.7%) were found in group I with the lowest incubation temperature. Raising the temperature by 0.3°C and 0.7°C in, respectively, group II and III reduced the hatchability indices, primarily due to an increased rate (by approx. 12%) of dead embryos in both groups. Temperature significantly influenced the duration of incubation period, as well as duration of hatching. Incubation at the highest temperature took the shortest time (49.9 days), whereas that at the lowest temperature lasted longest (51.5 days). A reversed pattern was found in the case of hatching duration, which at the higher temperature expanded by 282 minutes in group II and by 406 minutes in group III, as compared with group I.
5

Effect of relative humidity on the hatchability of emu [Dromaius novaehollandiae] eggs

84%
Szczerbinska D., Tarasewicz Z., Majewska D., Danczak A., Ligocki M., Romaniszyn K.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2004
|
tom 07
|
nr 2
Little information on emu incubation techniques has been published so far both in the Polish and foreign literature; hence this study, which is aimed to investigate effects of various levels of incubation relative humidity on the hatchability of emu eggs. Three levels of relative humidity (RH), 20, 25, and 30%, were applied to groups I, II, and III, respectively. The temperature 36.4°C was maintained constant in all the groups during the incubation. The poorest results were recorded in the group III with 30% relative humidity. Keeping lower humidity in the groups I and II resulted in improved hatchability, especially due to reduced percentage of crippled and weak chicks. It was found that humidity significantly influenced egg weight loss during incubation; lower relative humidity resulted in increased egg weight loss.
6

Zasady prawidłowego poskramiania papug

67%
Gruss M., Dojcz W.
Weterynaria w Praktyce
|
2020
|
tom 17
|
nr 04
7

Meat quality of broiler quail fed on feeds with different protein content

67%
Gardzielewska J., Jakubowska M., Tarasewicz Z., Szczerbinska D., Ligocki M.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2005
|
tom 08
|
nr 1
The aim of this experiment was to study how reduced content of protein in each feeding stage during raising influences carcass fattiness and, in consequence, the chemical composition, and meat physicochemical and sensory properties in 6-week-old quail. The material comprised 150 one-day-old Pharaoh quail divided into three experimental groups. The birds of the group I received feeds with nutritional value recommended by feeding standards for growing quail, while the groups II and III received rations with reduced level of protein in all feeds for the period of raising. At the age of 42 days, 6 male and female birds of the body weight similar to the sex's average from each group were slaughtered. The amount of abdominal and non-muscular fat was determined. Chemical assays (dry matter, protein, and fat content), physicochemical analyses (pH, colour, water-holding capacity), and sensory evaluation (boiled meat and broth) were carried out. The results of the study allowed us to conclude that lower level of protein content in the feed reduced fattiness of the carcasses, improved the meat water-binding (holding) capacity. Most remaining tested meat quality characters were similar to those obtained in the control group.
8

Ogolnoczeska wystawa drobnego inwentarza z udzialem wystawcow zagranicznych, Brno, 17-18 listopada 2000

43%
Barabasz B.
Biuletyn Informacyjny dla Hodowców Szynszyli
|
2000
|
nr 4
25-27
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