@article{leksrisompong_romero-sanchez_plumstead_brannan_yahav_brake_2009, title={Broiler incubation. 2. Interaction of incubation and brooding temperatures on broiler chick feed consumption and growth}, volume={88}, ISSN={["1525-3171"]}, DOI={10.3382/ps.2008-00412}, abstractNote={The effect of either hot or cool brooding litter temperature on feed consumption, BW, and mortality of broiler chicks that had been exposed to either normal or high temperature during latter stages of incubation was studied in 2 experiments. The duration of experiments 1 and 2 was 14 and 21 d, respectively, with BW and feed consumption determined at 2, 5, 7, and 14 d of age in experiment 1 and at 7, 14, and 21 d of age in experiment 2. High incubator temperature after embryonic d 16 decreased chick feed consumption and BW at all ages in both experiments. Hot brooding litter temperature increased feed consumption at 2 and 5 d in experiment 1 and at 7 d in experiment 2 but decreased feed consumption at 14 and 21 d in experiment 2. Feed consumption was also influenced by the incubation temperature x brooding litter temperature interaction. From 0 to 2 d or 0 to 7 d in experiments 1 and 2, respectively, the highest to lowest feed consumption was exhibited by the normal-hot, high-hot, normal-cool, and high-cool interaction groups but the order changed to normal-cool, normal-hot approximately high-cool, and high-hot from 7 to 14 and 14 to 21 d in experiment 2. Significant effects on mortality were observed in experiment 2 only where males exhibited greater mortality that was most evident in the combination of high temperature incubation followed by cool brooding. Excessive (high) eggshell temperature during the latter stages of incubation reduced feed consumption and BW through 21 d of age. However, the results showed that the hot brooding litter temperature supported increased feed consumption during the first few days of brooding even for the chicks that had been subjected to high incubation temperature. Hot brooding also reduced male mortality in experiment 2. Nonetheless, hot brooding litter temperatures should be limited as extending beyond a few days eventually decreased feed consumption.}, number={6}, journal={POULTRY SCIENCE}, author={Leksrisompong, N. and Romero-Sanchez, H. and Plumstead, P. W. and Brannan, K. E. and Yahav, S. and Brake, J.}, year={2009}, month={Jun}, pages={1321–1329} }
 @article{romero-sanchez_plumstead_leksrisompong_brannan_brake_2008, title={Feeding broiler breeder males. 4. Deficient feed allocation reduces fertility and broiler progeny body weight}, volume={87}, ISSN={["1525-3171"]}, DOI={10.3382/ps.2007-00285}, abstractNote={Two experiments were conducted to evaluate the effects of male broiler breeder feed intake on broiler progeny performance. In experiment 1, a low cumulative nutrition program supplied 29,580 kcal of ME and 1,470 g of CP, whereas a high cumulative nutrition program supplied 33,500 kcal of ME and 1,730 g of CP to photostimulation at 21 wk of age. Two diets (HiDiet and LoDiet) were formulated, and a single feeding program was used to achieve the selected nutrient intakes. The HiDiet group of males in experiment 1 achieved greater BW and exhibited lower fertility when fed as the LoDiet males from the onset of egg production. The HiDiet breeder males subsequently produced male broilers from eggs laid at 29 wk of age that exhibited lower BW at 42 d. This was due to the heaviest 50% of the breeder males in this treatment not gaining BW consistently due to less-than-adequate ME intake relative to their greater BW requirements. Two feeding programs during the production period (constant or increasing) were compared in experiment 2. Broilers were hatched from eggs laid at 32 and 48 wk of age to evaluate the vertical effect of male treatments on progeny performance. No difference in fertility or broiler performance was found at 32 wk. However, the constant feeding program produced lower fertility from 36 to 55 wk of age, and this resulted in a lower male and female broiler progeny BW at 42 d of age from eggs collected at 48 wk of age. Adequate breeder male feed allocation during the production period improved fertility and favorably affected broiler progeny performance in both experiments. However, broiler progeny effects were observed only when there were differences in fertility, which suggests that the males with the greatest genetic potential were not mating at these times.}, number={4}, journal={POULTRY SCIENCE}, author={Romero-Sanchez, H. and Plumstead, P. W. and Leksrisompong, N. and Brannan, K. E. and Brake, J.}, year={2008}, month={Apr}, pages={805–811} }
 @article{leksrisompong_romero-sanchez_plumstead_brannan_brake_2007, title={Broiler incubation. 1. Effect of elevated temperature during late incubation on body weight and organs of chicks}, volume={86}, ISSN={["1525-3171"]}, DOI={10.3382/ps.2007-00170}, abstractNote={Three experiments were conducted to investigate the effect of increased egg temperature during the final third of incubation on BW, yolk sac, heart, and digestive organs of broiler chicks at hatching. Egg temperatures were found to be approximately 1.0 to 1.5 degrees C higher than incubator air temperature. Elevated egg temperature (39.5 degrees C) after embryonic day 14 generally accelerated hatching time but decreased the relative weight of the heart in all 3 experiments, whereas BW and relative weights of the gizzard, proventriculus, and small intestines were significantly smaller in 2 of 3 experiments as compared with the control (approximately 38.2 degrees C). Relative weights of the yolk sac or liver were significantly larger due to elevated egg temperature in single experiments only. A striking feature of the chicks that developed at an elevated egg temperature was their white color as compared with the yellow color of chicks from eggs incubated at more normal temperatures.}, number={12}, journal={POULTRY SCIENCE}, author={Leksrisompong, N. and Romero-Sanchez, H. and Plumstead, P. W. and Brannan, K. E. and Brake, J.}, year={2007}, month={Dec}, pages={2685–2691} }