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Plasma concentration of cortisol and hematological profile on broiler chickens can be used as heat stress indicators. This study was conducted to investigate the effect of administration of n-hexane extract of jaloh bark (EHJ) on heat-stressed broiler chicken. Thirty broilers, aged 20 days (strain Cobb), were randomly divided into 5 groups. The first group was external control (tCP) i.e. chickens without heat stress and without EHJ administration. The second group was internal control (CP) representing chickens given heat stress without EHJ administration. The third, fourth, and fifth groups were chickens given heat stress and EHJ administration at doses 5, 10, and 20 mg/kg BW, respectively symbolized as CP+EHJ5, CP+EHJ10, and CP+EHJ20. The experimental broilers were exposed to heat stress in constant temperature of 33 ± 1oC for 4 hours daily for 5 and 10 days. The EHJ was given 1 hour before temperature in the cage was raised and was given in daily basis. The level of cortisol in feces were measured from feces collected 1-2 hours before treatment, 3-4 hours after heat stress exposure, and 2-3 hours after heat stress termination. This research indicated that heat stress at temperature 33 ± 1oC during 2 and 4 hours increased cortisol excretion in feces (P

This research was conducted to study the effects of jaloh extract (Salix tetrasperma Roxb) on broiler chicken exposed to heat stress in constant temperature of 33 ± 1oC for 4 hours per day for 10 days. Fifteen chickens aged 20 days old (strain Cobb) were divided randomly into 5 groups. The first group was external control (tCP) of the chickens received neither heat stress nor jaloh extract. The second group was internal control (CP) representing chickens given heat stress without jaloh extract. The third, fourth, and fifth groups consisted of chickens given heat stress and 10 mg/kg BB of hexane (CP+Hek), ethyl acetate (CP+EtOAc), and ethanol (CP+EtOH) fractions, respectively. Heat stress and jaloh extract were given every day. Extract of jaloh were given 1 hour before temperature in the cage was raised. On 10th day of the experiment, 3 chickens were killed and necropted. Liver and kidney tissues from each treatment were analyzed for histological condition. The results indicated that heat stress can induce injury degeneration, necrosis, and infiltration of inflammation cells of liver and kidney. It is concluded that the hexane fraction of jaloh extract could protect the detrimental effects on heat stress.

Twenty-nine fetuses (11 fetuses from 9 non-superovulated ewes and 18 fetuses from 8 superovulated ewes) were used to study the effect of superovulation of ewes prior to mating on fetal weight, fetal length, the length of the body and limbs, chest circumference, weights of the body, head, neck, limb, and viscera. Superovulated ewes, though with a higher litter size, had a greater fetal growth as was indicated by the greater fetal weight and length, the length and weight of the body and limb on day 49 of pregnancy. On day 105 of pregnancy, superovulated ewes with multiple fetuses (≥3) had similar fetal growth than nonsuperovulated ewes with single and twin fetuses. However, superovulated ewes with a single fetus had greater fetal growth as was shown by the greater fetal weight and length, the length of the body and limbs, chest circumference, and weight of the body, limb, and viscera when compared to those non-superovulated ewes with a single or twin fetuses. The results of the experiment suggested that superovulation of ewes prior to mating could be used to improve fetal prenatal growth during pregnancy