Keywords : Heat stress


Effect of probiotic (Poultrystar®) and heat stress on some blood parameters in common carp (Cyprinus carpio L.)

Rawnaq Ismail; Alaa Alhamdani

Iraqi Journal of Veterinary Sciences, 2019, Volume 33, Issue 2, Pages 221-225
DOI: 10.33899/ijvs.2019.125539.1061

This study was conducted to determine the effect of the heat stress on some blood parameters and role of probiotics (Poultrystar®) to reduce these effects, 120 common carp (Cyprinus carpio) with mean weight 150±10g were obtained from collage of Agriculture and forestry /University of Mosul. Fish were acclimated for at least 7 day in the laboratory and fed daily, the water temperature was maintained at 25 ±2°C. Three experiments have been done, each of 40 fish which have been divided randomly into four groups 10 for each. First experiment the four groups exposed to different water temperature (control 25, 30, 32, 34 °C), second experiment the four groups treated with (Poultrystar®) in a dose 1 g/ kg body weight by using stomach tube with exposed to heat stress (control 25, 30, 32 and 34 °C). In the third experiment the four groups have been treated with (Poultrystar®) in the same dose of the previous experiment for 7 days then exposed to heat stress. The results show there were significantly increase in hemoglobin concentration in three experiments, and also the Packed cell volume was significantly increase in three experiments, but the stress index was significantly decrease in three experiments, and the probiotics (Poultrystar®) improved the blood picture especially in the second and third experiment because no probiotic used in the first experiment.

Effect of heat stress on sex hormones, sex organ weight and relationships with sexual puberty in male rats

hiyam matty; Ashwaq Hassan

Iraqi Journal of Veterinary Sciences, 2019, Volume 33, Issue 2, Pages 63-71
DOI: 10.33899/ijvs.2019.163089

This study was designed to investigate the effect of chronic and acute heat stress on sex hormones level and their relationship to sexual puberty in male rats. Used 45 male pups in the age of weaning, were randomly divided for 3 groups each group included 15 pups of each sex. 1st group was a control group, 2nd group exposed to chronic heat stress at 38Cº for 1hour a day since the age of weaning until onset of puberty and the 3rd group exposed to acute heat stress at 38Cº for 4 hours per day for 5 consecutive days from 35 day age of rat and each group above were secondarily divided into 3 age groups consisted of pre-puberty, at puberty and post-puberty. Results of study showed that male rats exposed chronic heat stress led to a significant increase in body weight, tail of epididymis, prostate gland weights, at onset of puberty compared with control group, with a significant decrease in body weight, testis, head and tail of epididymis, prostate and seminal vesicle weights at post-puberty compared with control group. as well as a significant decrease in the level of luteinizing hormone at post-puberty compared with acute heat stress group. Males exposed to acute heat stress cause a significant decrease in the head and tail of the epididymis, prostate, and seminal vesicle weights and significant increase in the concentration each of testosterone and luteinizing hormones at post-puberty compared with the control group. Acute exposure to heat stress caused early sexual puberty in males to show from the early appearance of first sperm compared with the control group, while the exposure to chronic heat stress led to delay of puberty associated with a delay in the appearance of first sperm compared with the control group. It concluded from this study that male rat's exposure to heat stress affects differently on sex hormone. Acute heat stress led to reach early sexual puberty and reflected the impact on puberty when chronic exposure to heat stress.

Potency of garlic juice supplementation on some physiological and immunological aspects of broilers exposed to heat stress

H.A.J. Al-Shwilly

Iraqi Journal of Veterinary Sciences, 2017, Volume 31, Issue 2, Pages 107-112
DOI: 10.33899/ijvs.2017.145606

The current study aimed to investigate the effect of garlic juice supplementation with broiler drinking water on performance, immune response, lipid profile, blood picture and activity of liver enzymes under heat stress. For this purpose 100 four days aged broiler checks (Ross) were allocated into control (C) and three treatment groups (25 each). All group checks were housed at 5 ºC above normal ambient temperature during the experiment. Treatment groups (T1, T2 and T3) checks were supplemented with 0.5, 1 and 1.5 ml/L, respectively, with garlic juice in drinking water (6 hrs a day). Food and water were supplemented ad libitum. Body weights were monitored every five days and blood samples were obtained at 25 days for assessment of blood picture and antibody titers after vaccination, total cholesterol and triglycerides concentrations and activity levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST) and alkaline phosphatase (ALP) were estimated. At 30 days age, T3 group broiler checks reported higher body weights than other groups. Total number of white and red blood cells, hemoglobin concentration, hematocrit levels and ratio of heterocytes to lymphocytes increased significantly in treated groups, whereas significant decline of cholesterol and triglycerides concentrations as well as ALT and AST levels were shown in T3 group broiler checks. Significant increase was shown in the levels of antibody titers against both Newcastle (ND) and infectious bursal disease (IBD) vaccines. In conclusion, treatment of broiler checks early with garlic juice increase broiler performance and immune response against vaccination program and may be protect the broilers from heat stress.