NUTRITIONAL MODIFICATION to ALLEVIATE HEAT STRESS and ENHANCE PRODUCTIVE PERFORMANCE of JAPANESE QUAIL SUBJECTED to HIGH AMBIENT TEMPERATURE

2017 ◽  
Vol 37 (3) ◽  
pp. 721-747
Keyword(s):  
Heat Stress ◽  
Ambient Temperature ◽  
Japanese Quail ◽  
High Ambient Temperature ◽  
Productive Performance

scholarly journals Effect of High Ambient Temperature in Early and Late Lactation on Litter Growth and Survival in Rats

1973 ◽  
Vol 26 (5) ◽  
pp. 1171 ◽  
Author(s):  
Helen Hearnshaw ◽  
Manika Wodzicka-Tomaszewska
Keyword(s):  
Growth Rate ◽  
Heat Stress ◽  
Ambient Temperature ◽  
High Ambient Temperature ◽  
Litter Production ◽  
Growth And Survival

The effect of heat stress, applied either during the first half or during the second half of lactation, on total litter production per rat was studied. The survival of the pups, the growth rate of the surviving pups, the liveweight changes, and feed intakes of the rats were also measured. Some observations were also made on maternal and pup behaviour.

scholarly journals Effect of prenatal ambient temperature on the performance physiological parameters, and oxidative metabolism of Japanese quail (Coturnix coturnix japonica) layers exposed to heat stress during growth

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Thaís Pacheco Santana ◽  
Eliane Gasparino ◽  
Angélica de Souza Khatlab ◽  
Claudson Oliveira Brito ◽  
Leandro Teixeira Barbosa ◽  
...  
Keyword(s):  
Heat Stress ◽  
Ambient Temperature ◽  
Antioxidant Capacity ◽  
Protein Content ◽  
Japanese Quail ◽  
Oxidative Metabolism ◽  
Coturnix Japonica ◽  
Coturnix Coturnix Japonica ◽  
Negative Effects ◽  
Coturnix Coturnix

AbstractA strategy to mitigate the negative effects of stress on animals is to enhance their ability to beneficially respond to stressful conditions. This study aimed to assess whether prenatal ambient temperature influences the response of Japanese quail (Coturnix coturnix japonica) chicks to environmental challenges during growth. The experiment was conducted in a 2 × 2 factorial arrangement: two temperature conditions for the mothers (thermoneutral and heat stress by continuous exposure to 32 °C) and two offspring ambient temperature conditions (thermoneutral and heat stress by intermittent exposure to 34 °C for 6 h/day from 15 to 35 days of age). Heat stress in mothers led to lower laying rate, egg mass, expression of methionine sulfoxide reductase A (MSRA) gene, and antioxidant capacity as well as higher chick mortality rate (1–15 days of age). Maternal heat stress led to lower weight gain and total antioxidant capacity and higher feed conversion ratio. Maternal temperature × Offspring temperature interaction effects were observed on carbonylated protein content and HSP70, GSS, and MSRA gene expression. It was observed that, for chicks hatched from heat-stressed mothers, exposure to heat stress led to higher carbonylated protein content and HSP70 expression than exposure to thermoneutral conditions. Maternal heat stress was also responsible for increasing GSS expression in chicks grown under thermoneutral conditions. Chicks hatched from non-stressed mothers and subjected to heat stress had higher MSRA expression compared to chicks maintained in a thermoneutral environment. Our results show that, although maternal heat stress had no negative effects on performance or oxidative metabolism of offspring grown under thermoneutral conditions, it was associated with lower performance and higher protein oxidation in offspring exposed to heat stress during growth. These results could be due in part to alterations in the expression of genes related to antioxidant capacity.

scholarly journals The effects of acute heat stress on proliferative and apoptotic processes in the rat adrenal cortex

2013 ◽  
Vol 65 (3) ◽  
pp. 905-909 ◽  
Author(s):  
Dragana Petrovic-Kosanovic ◽  
V. Ajdzanovic ◽  
Maja Cakic-Milosevic ◽  
Vesna Koko ◽  
Verica Milosevic
Keyword(s):  
Heat Stress ◽  
Ambient Temperature ◽  
Adrenal Cortex ◽  
Light And Electron Microscopy ◽  
Relative Number ◽  
Zona Glomerulosa ◽  
High Ambient Temperature ◽  
Zona Fasciculata ◽  
Mitotic Chromosomes ◽  
Ki 67

Hyperthermia can cause significant structural and functional reorganization of tissues and organs. The proliferative and apoptotic processes of rat adrenal cortex were analyzed by light and electron microscopy after an acute exposure to high ambient temperature. Animals were divided in two groups. The first group consisted of intact controls. The rats from the second group were exposed to a high ambient temperature of 38?C for 60 min. Mitotic chromosomes and the largest number of immunoreactive nuclei for the Ki-67 were observed in the zona reticularis (ZR) of the control animals. The relative number of mitoses after heat stress showed a significant decrease in the zona glomerulosa (ZG; 66.8%), zona fasciculata (ZF; 27.8%) and ZR (86.7%) (for all zones p<0.05), while in the whole adrenal cortex the after-treatment decrease was 61.9% (p<0.05) compared to the controls. Under heat stress numerous apoptotic nuclei were seen at the light and ultrastructural levels in all the zones of the adrenal cortex. Such dynamics of mitosis/apoptosis events seriously affect adrenal cortex morphology.

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