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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Pulikanti, R. Peebles, E. D. Zhai, W. Gerard, P. D. |
| Description | Country affiliation: United States Author Affiliation: Pulikanti R ( Department of Poultry Science, Mississippi State University, Mississippi State, 39762, USA.) |
| Abstract | The comprehensive profiles of the internal and external temperatures of embryonated Ross × Ross 708 broiler hatching eggs during incubation were determined using temperature transponders, and eggshell water vapor conductance $(G_{H2O}),$ specific $G_{H2O}$ $(g_{H2O};$ $G_{H2O}$ adjusted to a 100 g set egg weight basis), and $G_{H2O}$ constants $(K_{H2O})$ were calculated. On each of 8 replicate tray levels of an incubator, 2 nonembryonated and 4 embryonated eggs were each implanted with a transponder on d 10.5 of incubation for the determination of internal (air cell) temperatures of nonembryonated $(T_{nem})$ and embryonated $(T_{emb})$ eggs, respectively. In addition, 2 water-filled vials, each containing a transponder, were used on each tray level for the determination of the external microenvironment temperatures $(T_{ext})$ of the embryonated and nonembryonated eggs. Between 10.5 and 18 d of incubation, incubator data logger temperatures were determined every 5 min; and incubator dry bulb temperature, $T_{ext},$ $T_{nem},$ $T_{emb},$ and the difference between $T_{emb}$ and $T_{nem}$ (∆T) were determined every 12 h. Over the days of incubation, regression coefficients for $T_{emb}$ and ∆T were positive, whereas the regression coefficient for $T_{nem}$ was negative. There was a significant day of incubation × type of temperature measurement $(T_{ext},$ $T_{nem},$ and $T_{emb})$ interaction for temperature. Between 13 and 18 d of incubation, mean values of $T_{emb}$ readings that were recorded every 12 h were consistently higher than those of $T_{ext}$ and $T_{nem},$ indicating the importance of air cell transponder implantation for the efficient estimation of broiler embryo temperature. Furthermore, mean values of the percentage of daily incubational egg weight loss, $G_{H2O},$ $g_{H2O},$ and $K_{H2O}$ of the embryonated eggs were 0.54 ± 0.019%, 14.4 ± 0.56 mg of $H_{2}O/d$ per Torr, 25.0 ± 0.96 mg of $H_{2}O/d$ per Torr per 100 g, and 5.20 ± 0.205, respectively. The results suggest that transponders may be implanted in the air cells of broiler hatching eggs to detect incubational variations in $T_{emb}$ and to subsequently calculate $G_{H2O},$ $g_{H2O},$ and $K_{H2O}.$ |
| File Format | HTM / HTML |
| ISSN | 00325791 |
| e-ISSN | 15253171 |
| Journal | Poultry Science |
| Issue Number | 1 |
| Volume Number | 91 |
| Language | English |
| Publisher | Oxford University Press |
| Publisher Date | 2012-01-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Veterinary Medicine Chick Embryo Physiology Egg Shell Telemetry Metabolism Animals Circadian Rhythm Ovum Regression Analysis Instrumentation Veterinary Temperature Thermometers Time Factors Evaluation Studies |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Animal Science and Zoology |
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