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Volume 15, Issue 1
Displaying 1-8 of 8 articles from this issue
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Hisayoshi NISHIYAMA1978 Volume 15 Issue 1 Pages 1-11
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
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Hiroshi SHIMIZU1978 Volume 15 Issue 1 Pages 12-17
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESSThe objectives of this study were to examine the relationship between male and female genotypes for the juvenile body weight and weight gain in broiler chickens and to examine its effect on the response to selection.
The data were collected from 1, 805 male and female chickens belonging to 317 sire groups of four breeding populations over four generations. The traits analysed were body weight at six and nine weeks of age and body weight gain from six to nine weeks of age.
Genetic correlations of the same traits mentioned above between male and female sibs were estimated to be different among populations, which suggested that artificial selection for different breeding objectives might be responsible for differential genetic correlations among those populations.View full abstractDownload PDF (552K) -
12. Proportional Parts, Amounts of Major Chemical Constituents and Interior Quality of the Fresh and Stored Khaki Cambell Duck EggsHisako TANABE, Noriko OGAWA1978 Volume 15 Issue 1 Pages 18-24
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESSProportional parts, amounts of major chemical constituents, palatability, and interior quality of the fresh and stored Khaki Cambell duck eggs were checked and compared with those of White Leghorn chicken eggs. The ducks and chickens were 7 months old and maintained on the individual cage houses.
Selected characteristics of the fresh duck eggs were as follows (mean of 20 eggs±SE): egg weight 62.72±0.91g, albumen weight 35.16±0.52g, yolk weight 21.01±0.41g, shell weight 6.55±0.18g, shell thickness 0.407±0.002mm, moisture of albumen 88.29± 0.15%, crude protein of albumen 8.77±0.23%, crude fat of albumen 0.13±0.03%, crude ash of albumen 0.53±0.02%, moisture of yolk 44.39±0.17%, crude protein of yolk 15.26±0.53%, crude fat of yolk 38.03±0.73%, crude ash of yolk 1.45±0.03%, albumen height 8.45±0.28mm, yolk height 19.73±0.26mm and pH of albumen 7.77±0.03.
No statistically significant difference of palatability between the boiled duck eggs and the boiled chicken eggs was found by triangle difference test.
Significantly higher interior qualities such as albumen height, albumen index and yolk height were observed in the duck eggs than those of chicken eggs, when they were stored in a box kept 25°C for 5, 10, 20, 30, 40 and 80 days.View full abstractDownload PDF (724K) -
III. Hatchability of Eggs Disinfected by Formaldehyde or by Certain Kinds of Disinfectant SolutionKenji FURUTA, Koshi WATANABE1978 Volume 15 Issue 1 Pages 25-30
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESSExperiments were conducted to determine the effect of disinfectaon on the hatchability of eggs disinfected prior to incubation. Hatching eggs were fumigated with formaldehyde liberated from 40ml of formalin by mixing with 20g of potassium permanganate for 0.5, 1.0, 2.0 and 3.0 hours, respectively. And the eggs were dipped in 3 different disinfectant solutions, a mixture of phenol derivatives, invert soap and an iodophor diluted 1 in 100 kept at 40°C for 4, 6 and 8 minutes, respectively.
Hatchability and percentage of healthy chicks hatched were not influenced by fumigation periods. Hatchability of the eggs dipped for 6 and 8 minutes was lower than that for eggs in the control group with or without washing with water after dipping. The percentage of healthy chicks also decreased.
No adverse effect was demonstrated on hatchability and percentage of healthy chicks when the eggs were fumigated for 1.0 hour or when the eggs were dipped for 4 minutes.View full abstractDownload PDF (606K) -
Minoru YOSHIDA, Hiroshi HOSHII1978 Volume 15 Issue 1 Pages 31-33
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESS -
Hiroshi SHIMIZU1978 Volume 15 Issue 1 Pages 34-35
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESS -
Yuichi SAEKI, Yorio INOUE, Shigeharu WAKANA1978 Volume 15 Issue 1 Pages 36-38
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESSThe time of transferring the pullets to laying cages will depend on the vacant cages available for the replacement birds. In principle, birds should be placed in cages at the younger age in order to protect them from the stress to be given by the new environment.
Chicks growing in the brooder were successively transferred to the laying cages at 55(A), 75(B), and 95(C) days of age. Some performances were observed during the period from the transfer to the end of the first-year egg production test.
In terms of performances, no significant differences were observed among the three groups(A, B, C), that is, egg production, age at the first egg, body weight at age of first egg, weight of first egg, and mortality (cf. Tables 1-4). These results suggest that the transfer to the laying cages at 55-95 days of age has no detectable effects on the subsequent economic performances.View full abstractDownload PDF (280K) -
1978 Volume 15 Issue 1 Pages 39-40
Published: January 30, 1978
Released on J-STAGE: November 12, 2008
JOURNAL FREE ACCESSDownload PDF (252K)
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