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All Journal Ovozoa: Journal of Animal Reproduction
Dadik Rahardjo
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Agriculture, Biological Sciences & Forestry Veterinary

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Factors associated with repeat breeding in Holstein Friesian cows at the Tani Wilis Village Cooperative Unit, Sendang District, Tulungagung Regency, Indonesia Dimas Kunto Satrio; M’ Izi Kumala Lazuardi Sultoni; Tasya Apritalia Putri; Soeharsono Soeharsono; Dadik Rahardjo; Djoko Legowo; Gandul Atik Yuliani; Iwan Sahrial Hamid; Mohammad Anam Al-Arif; Sunaryo Hadi Warsito; Pudji Srianto; Sri Pantja Madyawati; Tita Damayanti Lestari; Wurlina Wurlina
Ovozoa: Journal of Animal Reproduction Vol. 14 No. 2 (2025): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v14i2.2025.67-75

Abstract

This study aimed to evaluate the association of factors such as nutrition, thermal humidity index (THI), age, and lactation period with the occurrence of repeat breeding of dairy cows. The sample consisted of Holstein Friesian cows aged 1-11 years, with lactation periods ranging from 1 to 7 months, currently in lactation, and experiencing repeat breeding (inseminated three or more times without conception, despite exhibiting normal estrous cycles and intervals). The results showed that feeding practices by farmers did not significantly differ (p >0.05) in relation to the incidence of repeat breeding. THI values recorded in several barns also showed no significant differences (p >0.05), with the cows experiencing light to moderate heat stress. Similarly, the frequency of artificial insemination and the estrous cycle intervals remained within the normal range. The highest incidence of repeat breeding was observed in cows aged 2.5 to 5.5 years, accounting for 78.13%, and during lactation periods of 1-3 months, accounting for 81.26%. It can be concluded that there were no significant differences in the provision of forage and leguminous feed between normal cows and those with repeat breeding, and the crude protein content of forage did not influence its occurrence. Additionally, there was no indirect relationship between THI and repeat breeding. However, the incidence of repeat breeding tended to increase in cows aged 3-4 years, and during the second and third lactation periods.
Combination of 5% Dextrose Ringer's solution and egg yolk extender maintained the motility and viability of kampung rooster spermatozoa in chilled temperature Ahmad Hanif Azzam; Dadik Rahardjo; Tatik Hernawati; Sri Pantja Madyawati; Budi Utomo
Ovozoa: Journal of Animal Reproduction Vol. 11 No. 3 (2022): Ovozoa: Journal of Animal Reproduction
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/ovz.v11i3.2022.109-114

Abstract

This study aims to determine the motility and viability of kampung rooster (Gallus domesticus) spermatozoa in 5% Dextrose Ringer's solution as an extender with or without the addition of various egg yolk concentrations at 5ºC during storage. Semen was collected by massage in the morning. In this study, four types of extenders were used, i.e., 5% Dextrose Ringer's extender without egg yolk, 5% Dextrose Ringer's extender with 5, 7.5, and 10% egg yolk for T0, T1, T2, and T3, respectively. Then, 1000 IU Penicillin and 1 mg Streptomycin were added per mL extender. Fresh semen from each rooster was evenly divided into four volumes to be diluted 11 times in each group extender. Extended semen from all groups was stored at 5°C. Data were analyzed using ANOVA and Duncan's new multiple range test. The result showed a significant difference (p <0.05) between each treatment group for spermatozoa motility and viability. In conclusion, this study revealed that the addition of various concentrations of egg yolk into 5% Dextrose Ringer's solution as an extender maintained the motility and viability of kampung rooster spermatozoa.
Co-Authors Ahmad Hanif Azzam Al arif, Mohammad Anam BUDI UTOMO Dimas Kunto Satrio Djoko Legowo Gandul Atik Yuliani Iwan Sahrial Hamid M’ Izi Kumala Lazuardi Sultoni Pudji Srianto Soeharsono Soeharsono Sri Pantja Madyawati Sunaryo Hadi Warsito Tasya Apritalia Putri Tatik Hernawati Tita Damayanti Lestari Wurlina, W