International Journal of Progressive Sciences and Technologies (IJPSAT) ISSN: 2509-0119. © 2022 Scholar AI LLC. Vol. 38 No. 1 April 2023, pp. 553-557 Corresponding Author: Alfa Bintang 553 Prevalence and Intensity of Vaname Shrimp (Litopenaeus Vannamei) Ectoparasites in Shrimp Ponds in Nagari Tiku, Tanjung Mutiara District, Agam Regency Alfa Bintang, Nawir Muhar, Muhammad Amri, Mas Eriza Department of Aquaculture, Faculty of Fisheries and Marine Science, Bung Hatta University Abstract – This study aims to determine the type, prevalence, intensity, and dominance of ectoparasites on vaname shrimp (Litopenaeus vannamei) in shrimp ponds Nagari Tiku, Tanjung Mutiara District, Agam Regency. This research used the observation method and to determine the sampling stations, the purposive sampling method was used by determining 3 research stations. The results showed that there are 3 types of ectoparasites that attack vanamei shrimp (Litopenaeus vannamei), namely Zoothamnium sp., Vorticella sp. and Epistylis sp. The results of water quality measurements at 3 stations in the shrimp pond Nagari Tiku, Tanjung Mutiara District, Agam Regency did not exceed the threshold except at station I on the measurement of pH, and station II on the measurement of salinity. Keywords – Vannamei shrimp, ectoparasites, Prevalence, intensity, dominance, water quality I. INTRODUCTION Vannamei shrimp (Litopenaeus vannamei) is a shrimp that has economic value and is an alternative type of shrimp that can be cultivated in Indonesia, besides tiger shrimp (Penaeus monodon) and white shrimp (Penaeus merguensis). This is also what has made many shrimp farmers in Indonesia work on it in recent years. Shrimp farming activities in Indonesia have been carried out by many farming communities in the 1980s, from the application of simple technology to the application of intensive technology [1] . Parasites that usually attack vannamei shrimp farming are a class of protozoa, usually found in abundance in rearing media with high organic matter content. These poor environmental conditions can be caused by high stocking densities and feed residue which can increase water ammonia levels and accumulation of waste on cultivated land, making it easier for shrimp to get sick. The existence of parasites that exceed normal limits can affect the health of the host being invested. One of the types of ectoparasites that are often found attacking shrimp is the protozoa group. There are three types of ectoparasites in vannamei shrimp, namely: Epistylis sp., Zoothamnium sp., and Vorticella sp. which is often found investing in vannamei shrimp [2] . Efforts that can be made to overcome the occurrence of parasitic attacks include prevention. To be able to carry out preventive measures effectively and efficiently, it is necessary to have information about the causes or agents of the disease that attacks, in this case, the ectoparasites that attack vannamei shrimp, so further research is needed regarding the identification and prevalence of ectoparasitic attacks on vannamei shrimp. This study aims to analyze the type, prevalence, intensity, and dominance of ectoparasites in vannamei shrimp (Litopenaeus vannamei) in Nagari Tiku shrimp ponds, Tanjung Mutiara District, Agam Regency. II. LITERATURE SURVEY Parasites that usually attack vannamei shrimp farming are a class of protozoa, usually found in abundance in rearing media with high organic matter content. These poor environmental conditions can be caused by high stocking densities and feed residue