On the evaluation of chicken egg shape variability

Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis

Ivo Křivánek¹  Miroslav Havlíček¹  Libor Severa¹  Šárka Nedomová²  Jana Simeonovová² 

[1] Ústav techniky a automobilové dopravy, Mendelova univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika;Ústav technologie potravin, Mendelova zemědělská a lesnická univerzita v Brně, Zemědělská 1, 613 00 Brno, Česká republika;

关键词: chicken egg;    shape variability;    elliptic Fourier analysis;   

DOI  :  10.11118/actaun200856050069

来源: DOAJ

【 摘 要 】

Although recently reported models for determining egg shape are highly accurate, certain com­pli­ca­ted measurements or computations are to be performed. Thus relatively simple and attainable analysis methods of chicken egg shape variability were chosen and used for the purpose of presented research. Sample of 250 eggs of ISA BROWN strain was examined. Geometrical parameters were measured and calculated with following expression of their coefficient of variation – namely egg length 3.56 %, egg maximum width 2.84 %, shape index 3.80 %, surface area 5.08 %, and egg volume 7.23 %. The second method consisted in shape quantitative measuring by the score of the principal components of elliptic Fourier descriptors (EFDs). The first four principles components which could explain over 99 % of the egg shape variations were found to be very good measures of the monitored phenomenon. It was found that 87.41 % of the total shape variation can be accounted to length to width ratio. Usefulness and relevance of the shape index usage was confirmed.

【 授权许可】

Unknown