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Prof. Dr. Imam Mustofa, drh., M.Kes
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Department of Veterinary Reproduction, Faculty of Veterinary Medicine, Universitas Airlaangga, Kampus C Mulyorejo – 60115, Surabaya 3015
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INDONESIA
Ovozoa: Journal of Animal Reproduction
Published by Universitas Airlangga
ISSN : 23026464     EISSN : 2722967X     DOI : http://dx.doi.org/10.20473/ovz.v9i1.2020.1-6
Core Subject : Health, Agriculture,
Agriculture, Biological Sciences & Forestry Veterinary
Ovozoa Journal of Animal Reproduction (Ovozoa J Anim Reprod) published original articles, review articles, and case reports in Indonesian or English, in the scope of veterinary reproduction and animal reproductive biotechnology from researchers, lecturers, students, and practitioners around Indonesia and worldwide. The main objective of the Ovozoa J Anim Reprod is to disseminate the results of scientific researches in the field of animal reproduction. Ovozoa J Anim Reprod invites manuscripts in the areas:  Development of reproductive diagnostic techniques  Development of reproductive technologies  Infectious and non-infectious reproductive diseases  Comparative pathology of reproductive diseases  Reproductive endocrinology  Infertility  Environmental and stress effects on reproduction  Better understanding of the in vivo fertilization process  Better understanding of embryonic development  Artificial insemination and embryo transfer  In vitro fertilisation and embryo culture  Sexual selection of sperm and embryo  Semen and embryo preservation  Reproductive cloning  Stem cell in reproduction  Development of assisted reproductive technologies  Molecular biology, genetics, proteomics, metabolomics application to reproductive biology
Arjuna Subject : Kedokteran Hewan - Kedokteran Hewan (Lain-Lain)
Articles 177 Documents
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Protective effects of ascorbic acid against fluoroquinolone-induced spermatogenic disruption in wistar rats Abayomi Onaolapo Adeoye; Samuel Oluwatimilehin Apooyin; Bisi Olajumoke Adeoye; Tolulope Ademola Olakojo; John Olumayokun Elijah; Moyinoluwa Julianah Onoja; Adedunsola Adewunmi Obasa; Olawale Olawumi Ola; Akinleye Stephen Akinrinde
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.111-117

Abstract

Ciprofloxacin, a widely used fluoroquinolone for the treatment of bacterial infections, has been associated with adverse effects on male reproductive function. This study investigated the protective effects of ascorbic acid on semen quality and testicular histomorphology in male Wistar rats treated with ciprofloxacin. Twenty healthy adults male Wistar rats (100-150 g) were randomly assigned to four groups (n = 5 per group): Group A received distilled water, Group B received ciprofloxacin (135 mg/kg), Group C received ciprofloxacin (135 mg/kg) plus vitamin C (200 mg/kg), and Group D received vitamin C alone (200 mg/kg). After acclimatization, the test substances were administered orally for 14 days. The animals were euthanized 24 hours after the final treatment to evaluate sperm motility, viability, and morphology, as well as testicular histomorphology. Administration of ciprofloxacin alone caused a significant decrease (p <0.05) in sperm motility and viability, accompanied by a marked increase in sperm morphological abnormalities. Testicular histoarchitecture also revealed severe damage, characterized by interstitial oedema, thinning and disorganization of the germinal epithelium, vacuolation of spermatogenic cells, and the absence of mature spermatozoa within the seminiferous tubules. Co-administration of ascorbic acid significantly ameliorated these toxic effects, resulting in reduced sperm abnormalities, improved sperm parameters, and restoration of normal testicular histoarchitecture with active spermatogenesis. In addition, vitamin C alone significantly improved normal sperm morphology compared with the distilled water-treated control group. This study suggests that ascorbic acid supplementation may mitigate ciprofloxacin-induced reproductive dysfunction.
Influence of clinically differentiated estrus vaginal pH windows on offspring sex ratio following artificial insemination in west African dwarf goats Oluropo Michael Obafemi; Ajibola Olaotan Obafemi; Afolarin Bolaji; Oluwadamilare Olufisayo Leigh
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.102-110

Abstract

The offspring sex ratio in mammals is generally considered to occur by chance, with many reports indicating an approximately 1:1 (male:female) ratio. The ability to influence this natural biological ratio could provide significant socioeconomic benefits in livestock production. Although sex-sorted semen offers a means of predetermining offspring sex, its high cost and reduced fertility following processing limit its accessibility to many livestock farmers in developing countries. Therefore, identifying a simpler and more affordable alternative would be highly beneficial. A total number of twenty-one goats were used for this experiment, comprising one Boer buck and 20 West African Dwarf (WAD) goat does weigh between 25 and 35 kg.  Estrus was synchronized using two intramuscular injections of 250 µg Synchromate® administered 11 days apart. Semen was collected from the buck using an electroejaculator (EE) after restraint, evaluated, and extended with a standard egg yolk sodium citrate extender. Each doe was artificially inseminated twice. Before each insemination vaginal pH was measured using a digital pH meter and recorded. Based on the vaginal pH at insemination, seven does were inseminated under acidic conditions, four under neutral conditions, and nine under alkaline conditions. All twenty (20) inseminated does gave birth to a total of 33 kids, comprising 15 females and 18 males. Further studies are needed to investigate the mechanisms responsible for changes in vaginal pH during estrus and to determine whether manipulation of vaginal pH could provide a practical approach to influencing offspring sex ratio in goats.
Effects of storage time on chilled sperm characteristics of three exotic boars reared under Cameroonian production conditions Fonou Tadiesse Lavoisier; Vemo Bertin Narcisse; Guiekep Nounamo Jemima; Niakam Tchouankap Suzanne Esther; Chongsi Margarette; Kenfack Augustave; Boufack Judith Laure
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.118-125

Abstract

The semen quality of exotic boar breeds introduced into Cameroon has been poorly assessed, and the characteristics of their chilled spermatozoa remain largely unknown. In artificial insemination (AI) programs, regular monitoring of semen quality is essential to maintain high reproductive performance. This study aimed to evaluate the response of semen from Landrace, Large White, and Duroc boars to chilled storage. Adult boars weighing 145-194.3 kg were housed individually in standard finishing pens (12.96 m²) equipped with a feeder and drinker. Semen was collected, chilled, and evaluated at 0, 24, 48, and 72 hours after collection. Analysis of fresh semen showed that sperm concentration was significantly higher (p < 0.05) in Duroc (218.6 ± 18.54 × 10⁶spz/mL) and Large White (200.6 ± 19.07 × 10⁶spz/mL) than in Landrace (149.2 ± 26.5 × 10⁶spz/mL), whereas semen volume showed the opposite trend. After 72 hours of storage, only Duroc semen exhibited significant reductions (p < 0.05) in the percentage of normal sperm cells (NSC), sperm viability, sperm membrane integrity, and seminal pH. In contrast, sperm kinematic parameters (TM, PM, VAP, VSL, VCL, and LIN) declined significantly (p < 0.05) with storage time in Landrace and Large White semen. In conclusion, semen from Landrace and Large White boars showed greater tolerance to chilled storage than semen from Duroc boars.
Socioeconomic and management factors associated with recognition of infertility signs and reproductive performance in smallholder dairy cattle farming in Tanzania Athanas Ngou; Richard Laven; Timothy Parkinson; Isaac Kashoma; Daniel Donaghy
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.126-141

Abstract

Understanding the factors that influence dairy farmers’ awareness of infertility and reproductive performance is critical for improving productivity. This cross-sectional survey sampled farmers across six Tanzanian regions (Njombe, Mbeya, Tanga, Kilimanjaro, Arusha, and Morogoro) and used multivariable analyses to examine associations between 13 predictors and four outcomes: recognition of infertility signs, recognition that failing to produce a calf annually indicates infertility, pregnancy status, and calving interval. Key findings showed that smaller herd sizes were associated with poorer recognition of infertility signs and lower pregnancy rates, while less experienced farmers surprisingly demonstrated better recognition of infertility signs and higher pregnancy rates. Farmers who regarded repeat breeding as a major or moderate constraint had shorter calving intervals than those who considered it a negligible constraint. Farmers relying exclusively on artificial insemination (AI) were more likely to identify failure to produce a calf annually as an indicator of infertility than those using both AI and natural service. Aside from region, other predictors showed no clear or consistent associations in either the univariable or multivariable models. This lack of detectable association does not imply the absence of an effect but rather indicates that the data could not distinguish between positive, negative, or null associations. Region emerged as the most consistent and influential predictor, showing significant associations with at least one category of each outcome variable. Overall, the results highlight the need for context-specific, regionally tailored interventions to improve reproductive performance in Tanzania's smallholder dairy systems.
Phenotypic stability of reproductive traits in dorper sheep under intensive tropical production systems Rismasari Rismasari; Dwi Wijayanti; Ulul Azmi; Dian Andriansyah; Mutasem Abuzahra
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.142-153

Abstract

This study evaluated the reproductive performance of Dorper sheep in an intensive system in West Java, Indonesia. Data included ewe parity (P1 and P2), lambing interval (LI), litter size at birth (LSB), weaning litter size (WLS), age at first lambing (AFL), annual reproductive rate (ARR), and offspring sex ratio. Data analysis was performed using the Kruskal–Wallis and Mann–Whitney tests. The strength of the correlation was interpreted based on the correlation coefficient (r), where values ​​close to 0 indicate a weak relationship, while values ​​close to ±1 indicate a strong relationship. Statistical significance was set at P < 0.05. The results showed a stable ARR value of 1.64 across genders, confirming the success of the accelerated lambing system (3 lambing in 2 years) with an average lambing interval of 259–265 days. There was an increase in the number of male lambs, reaching 60% by 2025, which correlated with the improved pre-conception nutritional status of the ewe. Parity did not affect the number of offspring per litter but demonstrated good stability in the trophic environment. Spearman’s correlation analysis showed that the relationships between reproductive parameters tended to be weak and insignificant, indicating that reproductive traits were relatively independent. In conclusion, an intensive rearing system can overcome tropical climate challenges and maximize the genetic potential of Dorper sheep. An ARR of 1.64 indicates good reproductive performance under the evaluated production conditions. Although a higher proportion of male offspring may be advantageous in meat-oriented production systems, further studies evaluating both the biological determinants of offspring sex ratio and its economic impact are needed before management recommendations can be made.
Dietary vitamin C supplementation improves semen quality and antioxidant activity in Japanese quail under summer heat stress Aimen Jahangir; Shamim Akhter; Sumiyyah Zuha; Bushra Allah Rakha; Hajrah Raad Tihami; Hafsah Tihami
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.162-175

Abstract

Heat stress severely affects the redox balance of poultry semen, as the limited supply of natural antioxidants is unable to neutralize the excessive production of free radicals. This oxidative stress can reduce sperm quality and reproductive productivity in Japanese quails during summer. Dietary supplementation may provide a cost-effective approach to maintaining semen quality under such conditions. The present study was conducted to assess the effects of dietary vitamin C on semen volume, antioxidant activity, sperm concentration, motility, viability, plasma membrane integrity, and acrosomal and DNA integrity over four weeks. Thirty male Japanese quails were maintained at an ambient temperature of 35-40 °C (May-June), divided into five groups, and supplemented with 40, 80, 150, or 170 mg vitamin C/kg diet, with a control group, for four weeks. Semen was collected weekly by manual massage, and sperm parameters were evaluated using three replicates per group per week. Vitamin C supplementation did not significantly affect semen volume (p> 0.05). However, semen quality parameters and antioxidant activity increased significantly (p< 0.05) up to the third week, with no further increase in the fourth week. The 150 mg/kg treatment showed the highest sperm concentration, motility, viability, plasma membrane integrity, acrosomal integrity, DNA integrity, and antioxidant activity at week three, with these values maintained in the fourth week. Thus, dietary vitamin C at 150 mg/kg may help maintain semen quality and antioxidant activity in Japanese quails during summer heat stress.
Parity-related changes in serum biochemical profile, estrus response, and conception rate following double PGF2α estrus synchronization in Ettawa grade dairy goats Rini Widyastuti; Sigit Prastowo; Akhmad Afifudin Al-Anshori; Faisal Amri Satrio
Ovozoa: Journal of Animal Reproduction Vol. 15 No. 2 (2026): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v15i2.2026.154-161

Abstract

Parity affects metabolic status and reproductive performance in female livestock. Since metabolic status can influence ovarian function and fertility, assessing serum biochemical profiles during estrus synchronization may help predict reproductive performance. This study assessed parity-related changes in serum biochemistry, estrus response, and conception rate following double prostaglandin F2α (PGF2α) estrus synchronization in Ettawa grade goats. A total of 24 goats were divided into three parity groups: low parity (0-1), medium parity (2-3), and high parity (4-5). All goats received two PGF2α injections at an 11-day interval. Serum samples were collected one day before the first injection (Day 0) and one day after the second injection (Day 12) to measure glucose, triglyceride, and cholesterol levels. The goats that exhibited estrus underwent double artificial insemination at a 12-hour interval, and conception was confirmed by ultrasonography 45 days after insemination. Following synchronization, the medium- and high-parity groups showed increased serum glucose levels (p< 0.05), while serum cholesterol levels were also increased in the medium- and high-parity groups (p< 0.05). After synchronization, serum triglyceride levels decreased in all groups (p< 0.05). The estrus response in the low-parity group was 12.5% lower than that in the medium- and high-parity groups; however, this difference was not statistically significant. The conception rate was over 80% in all groups. In conclusion, double PGF2α estrus synchronization resulted in parity-related changes in serum biochemistry, characterized by increased glucose and cholesterol levels and decreased triglyceride levels, while no significant differences in estrus response or conception rate were detected among the parity groups.

Page 18 of 18 | Total Record : 177

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