Journal of Animal Health and Production December 2022 | Volume 10 | Issue 4 | Page 475 Short Communication Abstract | Age is one of the essential factors determining the reproductive potency of the bull because it is related to the growth and development of livestock organs, including their reproductive organs. Te purpose of the present study was to evaluate the characteristics of fresh and frozen semen quality of Aceh cattle at diferent ages. Tree Aceh bulls were involved in this study. Te semen was collected from each bull aged 6 to 10 years and the fresh and frozen semen quality was evaluated directly. Te results showed that the bull age signifcantly afects semen volume, pH, sperm con- centration, total sperm, total motile sperm, and frozen semen production of Aceh cattle (p < 0.05). However, it was found that there was no signifcant change in the sperm motility, before freezing, post-thawing, and during recovery across age (p > 0.05). Semen volume, total sperm, total motile sperm, and frozen semen production increased in bulls from 6 to 7 years of age and then gradually reduced from 7 to 10 years of age. It could be concluded that the optimum semen productivity of Aceh cattle is when they are 7 years old. Keywords | Artifcial insemination, Frozen semen production, Indonesian local cattle, Reproductive performance, Total sperm output NURUL ISNAINI 1* , ERVIN KUSUMA DEWI REKSADINATA 1 , FAIZAL ANDRI 1 , TRI HARSI 2 , IDA ZAHIDAH IRFAN 2 Efects of Bull Age on the Fresh and Frozen Semen Quality of Aceh Cattle Received | August 09, 2022; Accepted | August 25, 2022; Published | October 20, 2022 *Correspondence | Nurul Isnaini, Faculty of Animal Science, Universitas Brawijaya, Malang 65145, Indonesia; Email: nurulisna@ub.ac.id Citation | Isnani N, Reksadinata EKD, Andri F, Harsi T, Irfan IZ (2022). Efects of bull age on the fresh and frozen semen quality of aceh cattle. J. Anim. Health Prod. 10(4): 475-478. DOI | http://dx.doi.org/10.17582/journal.jahp/2022/10.4.475.478 ISSN | 2308-2801 Copyright: 2022 by the authors. Licensee ResearchersLinks Ltd, England, UK. Tis article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY ) license (https://creativecommons. org/licenses/by/4.0/). 1 Faculty of Animal Science, Universitas Brawijaya, Malang 65145, Indonesia; 2 Lembang Artifcial Insemination Center, Bandung 40391, Indonesia. INTRODUCTION T he increase in the Indonesian population has result- ed in increased demand for food, including beef. Tis is also supported by the increasing knowledge and public awareness of the consumption of balanced nutrition. How- ever, the increase in beef consumption is not proportional to the increase in livestock production. According to the CADIS (2020), the total beef production in Indonesia is 402.22 thousand tons, but the demand for beef reach- es 623.64 thousand tons. Terefore, eforts are needed to increase beef production so that it can meet the national demand. One type of local Indonesian cattle that can be used as a meat producer is Aceh cattle. Aceh cattle is one of the local Indonesian cattle that endemic in Aceh Province (MARI, 2011). Aceh cattle have resistance to a harsh environment such as feed and water crises, parasitic diseases, and high temperatures. In addition, Aceh cattle have good produc- tivity, produce 49-51% carcasses, and produce meat that has a smoother and denser tissue (MARI, 2011). However, the development of Aceh cattle is still constrained by the traditional breeding and maintenance system (Sofyan et al., 2020), so there is a need for technological innovations that can be used to support their production. Artifcial insemination is one of the reproductive technol- ogies that is carried out to accelerate the increase in the cattle population efectively and efciently. Semen quali-