Pola Distribusi Mikroba dan Pengaruhnya Terhadap Pembenihan Larva Udang Vanamei Di Hatchery Pantai Ketang Lampung

Pola distibusi mikroba atau penyebaran mikroba dalam suatu area perairan. Penelitian bertujuan untuk menganalisis kepadatan total Vibrio sp., coliform, dan plankton dari air laut, serta hubungan mikroba terhadap pembenihan larva udang vanamei. Penelitian dilakukan bulan April sampai Agustus 2022 berlokasi di Pantai Ketang, Kalianda, Lampung, laboratorium Mikrobiologi dan Zoologi FMIPA Universitas Lampung. Penelitian dilakukan dengan metode survei eksploratif. Tahap penelitian meliputi perhitungan total Vibrio, coliform, plankton, dan tingkat kelangsungan hidup. Analisis dilakukan analysis of variance, jika terdapat perbedaan nyata dilanjutkan uji Duncan (? = 0,05), sedangkan hubungan mikroba dianalisis dengan korelasi Pearson (? = 0,05). Hasil penelitian diketahui kepadatan Vibrio tertinggi pada bulan Mei (3 CFU/ml) dan air pemeliharaan larva (M) (5 CFU/ml), kepadatan coliform sebanyak < 3 MPN/100ml, kepadatan plankton tertinggi terjadi pada bulan Agustus (2×102 ind/L) dan air laut pasang (P) (1×104 ind/L). Terdapat hubungan yang sangat rendah antara kepadatan mikroba terhadap tingkat kelangsungan hidup larva udang vanamei. Abstract: The microbial distribution pattern or dispersion of microbes in a water environment was the primary focus of this research. The study aimed to analyze the total density of Vibrio sp., coliform, and plankton in seawater, as well as the relationship between microbes and the hatching of vanamei shrimp larvae. The research was conducted from April to August 2022 at Pantai Ketang, Kalianda, Lampung, in the Microbiology and Zoology laboratory of the Faculty of Mathematics and Natural Sciences, Lampung University. The research employed an exploratory survey method, including the calculation of total Vibrio, coliform, plankton, and survival rates. Data analysis was carried out using analysis of variance, followed by the Duncan test (? = 0.05) for identifying significant differences among groups. Additionally, the microbial relationship was analyzed using Pearson correlation (? = 0.05). The results revealed that the highest Vibrio density occurred in May (3 CFU/ml) and in larval shrimp rearing water (M) (5 CFU/ml). Coliform density was less than < 3 MPN/100ml, and the highest plankton density was observed in August (2×102 ind/L) and in high tide seawater (P) (1×104 ind/L). However, there was a very low correlation between microbial density and the survival rate of vanamei shrimp larvae.