Potential Seasonal Heat Stress of Sheep: Assessment of Four Husbandry Areas in Greece

2016 ◽  
Vol 32 (1) ◽  
pp. 125-129 ◽  
Keyword(s):  
Heat Stress ◽  
Seasonal Heat

Feedlot growth, carcass characteristics and meat quality of hair breed male lambs exposed to seasonal heat stress (winter vs. summer) in an arid climate

Meat Science ◽  
2020 ◽  
Vol 169 ◽  
pp. 108202
Author(s):  
Ulises Macías-Cruz ◽  
Oscar R. Saavedra ◽  
Abelardo Correa-Calderón ◽  
Miguel Mellado ◽  
Noemí G. Torrentera ◽  
...  
Keyword(s):  
Heat Stress ◽  
Meat Quality ◽  
Carcass Characteristics ◽  
Arid Climate ◽  
Seasonal Heat

Seasonal heat stress: Clinical implications and hormone treatments for the fertility of dairy cows

2015 ◽  
Vol 84 (5) ◽  
pp. 659-666 ◽  
Author(s):  
F. De Rensis ◽  
I. Garcia-Ispierto ◽  
F. López-Gatius
Keyword(s):  
Heat Stress ◽  
Dairy Cows ◽  
Clinical Implications ◽  
Seasonal Heat

scholarly journals Growth, Yield and Biochemical Characteristics of Tomato (Solanum lycopersicum L.) Genotypes under Seasonal Heat Stress

2020 ◽  
pp. 22-29
Author(s):  
T. R. Chapagain ◽  
A. K. Shrestha ◽  
M. D. Sharma ◽  
K. Mishra Tripathi ◽  
A. Srivastva
Keyword(s):  
Heat Stress ◽  
Block Design ◽  
Growth Yield ◽  
Climatic Conditions ◽  
Solid Content ◽  
Fruit Yield ◽  
Soluble Solid Content ◽  
The Mean ◽  
Seasonal Heat ◽  
Tomato Genotypes

This field study was conducted to evaluate yield and fruit quality of tomato genotypes under seasonal heat stress condition (April-June) in plains of Chitwan valley, Nepal for two consecutive years in 2018 and 2019 at research farm, of Agriculture and Forestry University, Rampur, Nepal. Nine tomato genotypes were evaluated for their morphological, flowering, yield and biochemical traits in a randomized complete block design with four replications. Results showed significant differences (P = 0.05) among all genotypes for all traits evaluated. Genotypes AVTO-9304 and AVTO-9801 were early flowering and flowered within 28 days after transplanting. The highest marketable fruit yield of 110.6 and 92.6 t ha-1 was recorded in genotype TO-1057 in 2018 and 2019, respectively with the mean yield of 101.6 t ha-1  whereas genotype AVTO-9802 produced  the lowest fruit yield in both years (34.0 and 32.0 t ha-1 in 2018 and 2019, respectively) with the mean yield of  32.9 t ha-1.  The highest amount of total soluble solid content (4.90 oBrix) was observed in genotype AVTO-9803. Genotype ‘AVTO-1314’ had a significantly higher amount (12.60 mg 100 g-1) of ascorbic acid but statistically at par with AVTO-9801, TO-1057 and Pariposa-4102. This study identified genotype TO-1057 as a highly productive genotype suitable for cultivation during summer months in Chitwan and this genotype could be promoted in other agro-ecological regions having the similar climatic conditions.

Effect of propylene glycol on fertility of postpartum dairy cows experiencing seasonal heat stress

2016 ◽  
Vol 50 (1) ◽  
Author(s):  
Atilla Yildiz ◽  
Zeki Erisir
Keyword(s):  
Heat Stress ◽  
Treatment Group ◽  
Energy Balance ◽  
Dairy Cows ◽  
Pregnancy Rate ◽  
Propylene Glycol ◽  
Post Partum ◽  
Control Group ◽  
Energy Status ◽  
Seasonal Heat

The objective of this study was to evaluate effects of a daily oral drench of Propylene Glycol (PG) on fertility in dairy cows experiencing seasonal heat stress. In treatment group, cows (n=9) were treated with drenching 250 ml propylene glycol once daily from 3 to 15 days post-partum following the morning milking. Another group of cows (n=9) was selected as untreated control. The serum beta-hydroxybutyrate (BHBA) concentrations were used as indicators of energy status of the cows. Days to onset of luteal activity, calving to first service interval and pregnancy rate to first service were used to evaluate the reproductive performance. There was no difference in onset of luteal activity postpartum between the treatment and control groups. But the cows in the treatment group tended to have shorter intervals from calving to first insemination compared with cows in control group. The pregnancy rate to first service for cows treated with PG was 2.50 times greater compared with cows in control group. The energy balance was less negative for treatment group compared with control cows. In conclusion, although, drenching with 250 mL of PG per day from 3 to 15 days after calving did not improve the onset of luteal activity postpartum, treated cows tended to have shorter intervals from calving until first service. Propylene glycol administration would improve the negative energy balance status as observed by serum BHBA concentration, which might be an advantage to increase pregnancy rate at first AI in dairy cows experiencing seasonal heat stress.

Nutritional strategies to alleviate heat stress in pigs

2015 ◽  
Vol 55 (12) ◽  
pp. 1391 ◽  
Author(s):  
J. J. Cottrell ◽  
F. Liu ◽  
A. T. Hung ◽  
K. DiGiacomo ◽  
S. S. Chauhan ◽  
...  
Keyword(s):  
Heat Stress ◽  
Production Management ◽  
Heat Waves ◽  
Feed Additives ◽  
Tropical Regions ◽  
Pig Production ◽  
Multiple Strategies ◽  
Seasonal Heat ◽  
Production Animals ◽  
Nutritional Strategies

Pigs are comparatively less heat tolerant than other species of production animals, which poses challenges for stock productivity and management during seasonal heat waves that occur in summer. The issues surrounding heat and pig production are predicted to increase, based on the actions of climate change increasing the intensity, frequency and duration of heat waves. Furthermore, future growth areas of pig production are going to be in tropical regions such as South-east Asia and Latin America. Efforts by the pig to dissipate excess body heat come at a cost to health and divert energy away from growth, compromising efficient pig production. Management of heat stress requires multiple strategies, and recent research is improving the understanding of the application of nutritional strategies to ameliorate the effects of heat stress. In particular the use of feed additives is an important, flexible and economical method to alleviate heat stress and the intensive nature of pig production lends itself to the use of additives. Some specific examples include antioxidants, betaine and chromium, which have been proved effective or being tested in mitigating some certain impacts of heat stress in pigs. The aim of this review is to summarise recent advances in the nutritional management of heat stress in pigs.

scholarly journals PSIV-8 Effect of selenium and superoxide dismutase supplementation on heat stressed pigs

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 179-179
Author(s):  
Hieu H Le ◽  
Eva Vidacs ◽  
Deborah J Phillips ◽  
Weicheng Zhao ◽  
John B Furness ◽  
...  
Keyword(s):  
Superoxide Dismutase ◽  
Heat Stress ◽  
Inflammatory Responses ◽  
Respiratory Alkalosis ◽  
Efficient Production ◽  
Liquid Form ◽  
Large White ◽  
Anti Oxidant ◽  
Seasonal Heat ◽  
Post Hoc

Abstract Heat stress (HS) compromises efficient production of pigs, in part by increasing oxidative stress and inflammation. Therefore the aim of this experiment was to investigate if supplementation of the anti-oxidants selenium or superoxide dismutase (SOD) could ameliorate HS in the pig. Sixty-four female Large White x Landrace pigs (av. 27.75) were acclimated one of the following diets: control (standard grower diet), selenium (Se, + 0.3 ppm organic Se), recombinant SOD (rSOD, 50 IU/d) and Se plus rSOD (SS) for 14 days under thermoneutral conditions (TN, 200C). All rSOD was administered top dressed in liquid form. Pigs were then moved to climate rooms and housed under TN or heat-stress (8 h 350C, 16h 280C/d) for 3 days and blood, urine and tissue collected for analysis terminally on d3. All data was analysed using an ANOVA with Tukeys post-hoc tests. Heat stress increased respiration rate (RR), reduced blood pCO2 and HCO3-, which coupled with a lower base excess indicated that the pigs were experiencing respiratory alkalosis. Furthermore HS increased rectal and skin temperatures, and reduced thyroid hormone (T4) concentrations, however HSP 27 and 70 concentrations were not influenced. Heat stress increased plasma adiponectin and IL-1b, reduced SOD and TNF-a, while no changes in IL-6 and leptin were observed. The effects of the anti-oxidant diets were that Se and SS increased RR, however parameters of respiratory alkalosis were not negatively influenced. The Se diet reduced T4 independently of HS. No improvement in plasma SOD was observed with the rSOD diets, but rSOD reduced adiponectin in HS pigs and both rSOD and SS reduced IL-6 overall. In conclusion a reduction in inflammatory responses were observed with the antioxidants Se and rSOD, including during HS and therefore may be a useful addition to existing amelioration strategies to ameliorate seasonal heat stress in pigs.

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