WHITENING OF BROWN SHELLED EGGS - INDIVIDUAL VARIATION AND RELATIONSHIPS WITH AGE, FEARFULNESS, OVIPOSITION INTERVAL AND STRESS

被引:31
作者
MILLS, AD
NYS, Y
GAUTRON, J
ZAWADSKI, J
机构
[1] Station de Recherches Avicoles, Institut National de la Recherche, Agronomique—Centre de Tours
关键词
D O I
10.1080/00071669108417333
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
1. Fearfulness, shell colour, incidence and degree of shell whitening and the interval between ovipositions were studied in two populations of 30 brown egg laying hens with family histories of a low or a high incidence of egg shell whitening. 2. Hens of the population with the high incidence of whitening appeared to be more fearful than hens of the population with the low incidence of whitening. 3. Brown colouration of the egg shell and the incidence and degree of shell whitening declined as the hens aged. 4. Brown colouration and egg shell whitening were most pronounced on the blunt ends of the eggs. 5. A large part of the variation in egg shell whitening was attributable to the individual (hen) component of variance. 6. Differences in egg shell whitening, between the two populations, were detectable throughout the 26 weeks of the experiment. 7. Oviposition intervals were similar for normal and coated eggs when birds were not exposed to disturbance. 8. Disturbance of hens increased oviposition intervals and the incidence and degree of shell whitening, to a similar extent, in both populations. 9. It is concluded that stress-related egg retention is not the sole factor responsible for abnormal egg shell whitening. Shell whitening may occur as a consequence of the premature termination of shell pigmentation as well as a consequence of the retardation of oviposition which occurs when hens are disturbed.
引用
收藏
页码:117 / 129
页数:13
相关论文
共 23 条
[1]  
[Anonymous], 1956, NONPARAMETRIC STAT B
[2]  
BALL RF, 1974, POULTRY SCI, V52, P500
[3]   STRESS IN FARM-ANIMALS - A NEED FOR REEVALUATION [J].
DANTZER, R ;
MORMEDE, P .
JOURNAL OF ANIMAL SCIENCE, 1983, 57 (01) :6-18
[4]  
HUGHES BO, 1986, BRIT POULTRY SCI, V27, P325, DOI [10.1080/00071668608416885, 10.1080/00071660120121571]
[5]  
HUGHES BO, 1984, IRCS MED SCI-BIOCHEM, V12, P969
[6]  
HUGHES BO, 1975, BRIT POULTRY SCI, V17, P135
[8]  
JONES RB, 1985, IRCS MED SCI-BIOCHEM, V13, P797
[9]  
JONES RB, 1986, P INT S APPLIED ETHO, P171
[10]  
JONES RB, 1905, COGNITIVE ASPECTS SO, P82