scholarly journals Effect of warming profile at the onset of incubation on early embryonic mortality in long stored broiler eggs

2018 ◽  
Vol 97 (11) ◽  
pp. 4083-4092 ◽  
Author(s):  
I A M van Roovert-Reijrink ◽  
C W van der Pol ◽  
R Molenaar ◽  
H van den Brand
Keyword(s):  
Embryonic Mortality ◽  
Early Embryonic Mortality

scholarly journals Effects of storage period and egg weight of Japanese quail eggs on hatching results (short communication)

2005 ◽  
Vol 48 (5) ◽  
pp. 518-526
Author(s):  
I. Seker ◽  
S. Kul ◽  
M. Bayraktar
Keyword(s):  
Storage Period ◽  
Fertility Rate ◽  
Embryonic Mortality ◽  
Light Weight ◽  
Egg Weight ◽  
Heavy Weight ◽  
Japanese Quails ◽  
Early Embryonic Mortality ◽  
Hatching Eggs ◽  
Weight Groups

Abstract. This study was undertaken to determine the effects of storage period and egg weight of hatching eggs of Japanese quails on fertility, hatchability results. Eggs were obtained 150 females quails, all at 15 weeks of age. A total of 1942 hatching eggs were separated into 3 groups as light-weight (9.50-10.50 g), medium-weight (10.51-11.50 g), and heavy-weight (11.51-12.50 g). Based on storage period, eggs were divided into 5 groups as group 1 (0-3 days), group 2 (4-6 days), group 3 (7-9 days), group 4 (10-12 days), and group 5 (13-15 days). The influence of storage period on hatchability of fertile eggs and early, middle, and late period embryonic mortality rates was found significant (P<0.01). The effect of egg weight on fertility rate, hatchability of fertile eggs and early embryonic mortality was significant (P<0.05, P<0.01). The significant differences between storage period groups were observed in hatchability of fertile eggs. The differences between egg weight groups for fertility rate, hatchability of fertile eggs and early embryonic mortality was significantly higher in light weight group than the other egg weight groups. Results of this study concluded that a 12 day pre-incubation storage of hatching eggs of Japanese quails did not appreciably affect hatching parameters. Use of medium or heavy weight eggs for hatching may reduce early embryonic mortality rate.

scholarly journals The ART of selecting the best embryo: A review of early embryonic mortality and bovine embryo viability assessment methods

2015 ◽  
Vol 82 (11) ◽  
pp. 822-838 ◽  
Author(s):  
Kayla J. Perkel ◽  
Allison Tscherner ◽  
Casandra Merrill ◽  
Jonathan Lamarre ◽  
Pavneesh Madan
Keyword(s):  
Assessment Methods ◽  
Embryonic Mortality ◽  
Bovine Embryo ◽  
Embryo Viability ◽  
Viability Assessment ◽  
Early Embryonic Mortality

A mathematical model of fertilization failure and early embryonic mortality in sheep

1977 ◽  
Vol 89 (2) ◽  
pp. 309-317 ◽  
Author(s):  
P. A. Geisler ◽  
J. E. Newton ◽  
A. E. Mohan
Keyword(s):  
Mathematical Model ◽  
Reproductive Potential ◽  
Embryonic Mortality ◽  
Experimental Results ◽  
Fertilization Failure ◽  
Early Embryonic Mortality ◽  
Available Information

SummaryThe reproductive potential of a sheep system is much reduced by the failure of released ova to be fertilized and to survive to parturition. This paper looks at currently available information on fertilization failure and early embryonic deaths. Separate hypotheses are proposed for fertilization and for early embryonic mortality. For fertilization, the hypothesis is that a ewe that mates with a ram will end up with either all or none of her released ova fertilized. For embryonic mortality, the hypothesis is that the survival of a fertilized ovum depends only on how many ova were released with it and is independent of the survival or death of those released with it. A mathematical model is constructed on these hypotheses and its predictions are compared with published experimental results of other workers.

A COMPARISON OF FRESH AND FROZEN SEMEN IN THE INSEMINATION OF CONFINED SHEEP

1979 ◽  
Vol 59 (4) ◽  
pp. 685-691 ◽  
Author(s):  
G. A. LANGFORD ◽  
G. J. MARCUS ◽  
A. J. HACKETT ◽  
L. AINSWORTH ◽  
H. F. PETERS ◽  
...  
Keyword(s):  
Litter Size ◽  
Reproductive Performance ◽  
Artificial Insemination ◽  
Embryonic Mortality ◽  
Frozen Semen ◽  
Serum Gonadotropin ◽  
Early Embryonic Mortality ◽  
The Difference ◽  
Natural Service ◽  
Fresh Semen

The reproductive performance of crossbred sheep maintained in total confinement was compared after artificial insemination with fresh or frozen semen. Estrus was synchronized with progestagen-impregnated vaginal sponges and pregnant mares’ serum gonadotropin. Inseminations were performed 54 and 60 h after sponge removal. The fertility of ewes inseminated with fresh semen was significantly higher than of ewes inseminated with frozen semen. Conception rates, lambing rates and litter size were 83%, 78% and 2.2 using fresh semen and 65%, 43% and 1.8 using frozen semen. In a group of similar ewes bred by natural service, the lambing performance was comparable to that obtained with fresh semen. The difference between conception and lambing rates suggests an increase in early embryonic mortality when breeding with frozen semen and confirms the need for improved frozen semen technology.

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