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The aromatase enzyme is an enzyme that converts testosterone to estrogen. This means that by administering aromatase blockers, testosterone levels increase and estrogen levels decrease. The problem faced is how the spermatogenesis process occurs because estrogen is needed as well in the process. This study aimed to evaluate the histopathological features of the testes due to the administration of natural aromatase blockers (NAB). Fifteen male Bangkok chickens were divided into 5 groups, namely: control group (C); testosterone continues (Tc 0.4 mg/bird/day); natural aromatase blockers 33 (NAB 3.3 g/bird); natural aromatase blockers 66 (NAB 6.6 g/bird); zinc (Zn): 0.45 mg/kg body weight (BW). The oral treatment was given for 35 days. The results showed that NAB did not affect wattle growth, but significantly affected testicle weight (p-value < 0.05). The NAB 66 group had the heaviest testis weight, followed by zinc, continuous testosterone, NAB 33 group, and the control group. This results was confirmed by HE staining on the testes which showed the thickness of the thickest spermatogenic and spermatid cell layers in the NAB 66 group. It was concluded that giving NAB did not harm the spermatogenesis process.

The albumin/globulin (A/G) ratio can be an immunological indicator of sheep which can be influenced by reproductive status such as pregnant and lactation conditions. However, a study of A/G ratio during pregnant and lactation in thin-tailed sheep is still lack. This study aimed to determine the levels of A/G ratio in thin-tailed sheep during pregnancy and lactation. This study used twelve of ewes thin-tailed sheeps (seven pregnant sheeps, and five lactating sheeps) rearing in Berbah, Sleman, Yogyakarta. Blood samples were collected through the jugular vein and filled into the EDTA tube and then albumin and total protein were measured. The levels of globulin were calculated by subtracting the total protein with albumin. The mean of A/G ratio in pregnant and lactation thin-tailed sheep was 0.72±0.18, and 0.57±0.15, respectively. Statistical analysis showed that there was no significantly difference in A/G ratio between pregnant and lactation (P>0.05). In conclusion, the difference in physiological status (pregnancy versus lactation) had no significant effect on the A/G ratio in thin-tailed sheep.

Thin-tailed sheep are the most widely kept sheep species in Indonesia. The neutrophils and lymphocytes (N/L) ratio can be a stress indicator for sheep. Stress conditions can cause animals to experience impaired growth, productivity, and behavioral changes. However, the study of thr N/L ratio during pregnancy and lactation in thin tailed sheep is still lacking and variations in physiological status such as pregnancy and lactation condition can cause differences in the N/L ratio. This study was conducted to determine the stress level on the physiological status of pregnant and lactating thin tailed sheep by looking at the difference in the N/L ratio. The blood samples used were seven pregnant sheep and five lactating sheep rearing in El Farm Ternak Domba Kambing dan Pendopo Sawah Kunden, Berbah, Sleman, Yogyakarta. The data obtained were analyzed using the Independent T-test method with the help of SPSS software version 16. The result of statistical analysis showed that the ratio N/L of pregnancy and lactation in thin tailed sheep was no significant difference (P>0.05). However, the average N/L ratio in pregnant conditions was higher, it was 0.61 ± 0.95, while in lactation conditions, it was 0.23 ± 0.30. The conclusion obtained from this study showed that the difference in the physiological status of pregnancy and lactation had no significant effect on the N/L ratio in ewes and the two physiological conditions of the studied sheep were still within normal limits.

Iguanas are exotic animals that are widely kept as pets in our society,their performance and color being their main attraction. Jogja Exotarium is anin situ conservation park that carries the back to nature concept. Animals thatare kept at the Jogja Exotarium are allowed direct contact with visitors. Thisstudy aims to determine the hormone triiodothyronine in female iguanas that are raised and conserved in situ. This study used feces obtained from iguanas kept in Jogja Exotarium, sampling was carried out on Wednesdays and Sundays for 2 weeks. The collected faecal samples were processed by usingfreeze-drying method and then extracted using 80% methanol. The extracted samples were analyzed using the enzyme immunosorbent assay (EIA) method. The results showed during the week day was 107.1 ± 7.01 ng/gr dry feces, while the week end was 119.95 ± 4.3 ng/gr dry feces. Based on the results of the study, it can be concluded that there is no difference in the hormone triiodothyronine in female iguanas during weekday and weekend

The Bangkok rooster is a prestigious ornamental bird in Indonesia. Zinc and shell have an aromatase blocker effect that results in testosterone elevations. Additionally, fishbone contains rich protein for optimum biological functions. Serum testosterone regulates comb size in the chicken. This study aimed to investigate the effect of natural aromatase blockers and protein in the comb of Bangkok roosters. This experiment divided thirteen Bangkok roosters into control and treatment groups with zinc, fishbone-shell, and fishbone supplementations. The weekly comb lengthening and widening were intervals between week 0 and the measurement week in this study. The results suggested that fishbone and fishbone-shell supplementations escalated the comb lengthening. Fishbone–shell treatment significantly increased the comb lengthening in the second and fourth weeks (p < 0.05). The significant elongation change in the fishbone group only appeared in the second week (p < 0.05). Otherwise, the treatments produced lower comb widening in the roosters. Fishbone and fishbone-shell supplementation significantly caused a lower widening in every measurement week (p < 0.05). This study uncovered the effects of zinc, shell, and fishbone supplementations on reproductive phenotype in Bangkok roosters.

The aim of this research is to evaluate the effect of Anadara granosa shell powder as a natural aromatase blocker (NAB) and zinc sulfate (ZnSO4) on the growth of the length comb, width comb, and body weight (BW) of layer chicken. This study used 45 DOC of layer’s chickens with 3 treatments and 15 replications, those are; control (T0), clamshell powder Anadara granosa as NAB 0.036 mg/40 g BW (T1), and ZnSO4 0.018 mg / 40 g BW (T2). This treatment was given for 35 days. The data on the growth of length comb, width comb, and BW are measured weekly. The data collected was analyzed using one-way ANOVA at the 95% confidence level with the assistance of SPSS. The results of statistical analysis of the length and width of the comb in the same column showed that T0 was not significantly different (p>0.05) from other treatments. The statistical analysis shows that the length and width of the layer’s chicken comb in the same row at T0, T1 and T2 were significantly different (p4 could not increase the growth of the length and width of layer chicken combs. The growth in length and width of layer chicken combs is very fast in the starter phase.

The use of antibiotic growth promoter as a feed additive for animals in Indonesia has been prohibited and regulated in law, starting from January 1, 2018. Alternative replacement for antibiotic was investigatedand introduced to farms such as probiotic. The commonly used probiotic was from the genus Lactobacillus, Bifidobacterium, and Bacillus. The aim of this study was to identify the Lactobacillus strains isolates from Jawa Super chicken excreta. Identification was based on the morphological, physiological, and biochemical characteristics. The sample was collected from Jawa Super chicken in Kalasan, Sleman, Yogyakarta. Each sample was diluted in 0.9% sterile saline and plated on MRS agar containing bromocresol purple. All plates were incubated at 37°C under anaerobic condition. Isolates were identified morphology, physiology, and biochemistry based on fermentation of carbohydrate by using Analytical Profile Index (API 50 CHL). This study showed that isolates belong to 2 categories of fermentation, facultatively heterofermentative and obligately heterofermentative. Not all isolates can grow at 10°C, but survive to low pH. Based on biochemical analysis isolates identify as L. brevis and L. pentosus. L. brevis and L. pentosus were strains of the Lactobacillus found in the excreta.