Loading...
Please wait, while we are loading the content...
Similar Documents
Analysis of Fertility in Broiler Breeder Flocks – Male Side Approaches
| Content Provider | Semantic Scholar |
|---|---|
| Author | Barna, Judit Végi, Barbara Váradi, Éva Liptói, Krisztina |
| Copyright Year | 2007 |
| Abstract | The rapid fertility decline is a worldwide problem in broiler breeder production. The aim of the present study was to clarify the role of male ratio and age on the fertility of broiler breeders in the second half of the reproduction cycle. The effect of various mating strategies in 7 small flocks of ROSS 308 broiler breeder was analyzed by weekly monitoring of GD IPVL holes in freshly laid eggs in comparison with the results of candling and of the determination of true fertility. 80 females and 8 males/experimental flocks were used in the study. The keeping circumstances followed the management manual. In the flocks various sexual ratios (decreasing, increasing or unchanged number of males), spiking techniques (50-100 % replacements of the cockerels at the age of 44 weeks) and exchange of the cockerels between two groups were tested. All the fertility level according to the candling (from the average of 95.1% to 90.4 %), the number of holes and the number of hatched chicks decreased significantly in each flock in the second half of the cycle independently from the number and/or age of males. Flock with 100 % spiking had significantly (P<0.05) more holes compared to 50 % spiking flock and flock with males with unchanged number in the second half of the cycle, but did not differ significantly from flocks with increasing or even with decreasing male number (control). Interestingly, the “true” fertility was higher in both flocks with young cockerels compared to the flocks with old ones with the same median values. Neither the increasing or maintaining of the number of males nor the spiking or exchanging of males could not maintain the earlier level of IPVL holes in the second half of the cycle, which indicates definitive role of the female genital tract in the fertility decline process. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://mge-hu.com/WEBSET_DOWNLOADS/526/BARNA_viet%20ea.pdf |
| Alternate Webpage(s) | http://mgegodollo.hu/WEBSET_DOWNLOADS/526/Full%20text%20Barna%20Judit%20rev.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
