Analisis Pengaruh Pemberian Lactobacillus sp. Terhadap Penyakit White Feces Disease pada Pembesaran Udang Vaname Litopenaeus vannamei

Abstract

Udang vaname Litopenaeus vannamei merupakan komoditas budidaya bernilai ekonomi tinggi namun rentan terhadap White Feces Disease (WFD). Proyek akhir ini bertujuan untuk mengevaluasi efektivitas pemberian probiotik Lactobacillus sp. dalam mengendalikan WFD pada sistem budidaya semi-intensif di PT. Prima Bakti Sentosa, Padang. Perlakuan terdiri atas dua metode aplikasi, yaitu water probiotic dan feeder probiotic, dengan dosis 1,5 ppm per minggu. Hasil menunjukkan bahwa feeder probiotic menghasilkan sintasan tertinggi sebesar 77,33%, sedangkan ADG tertinggi (0,19±0,02 g/hari) dicapai pada water probiotic. Nilai Total Vibrio Count di seluruh kolam berada di bawah 10³ CFU/mL, menunjukkan bahwa kualitas air tetap terjaga. Rata-rata bobot udang tertinggi tercatat pada perlakuan water probiotic sebesar 32,56 g/ekor. Temuan ini menunjukkan bahwa pemberian Lactobacillus sp. sebagai probiotik efektif dalam menekan WFD serta meningkatkan performa pertumbuhan udang vaname.

Pacific whiteleg shrimp Litopenaeus vannamei is a high-value aquaculture commodity but is susceptible to White Feces Disease (WFD). This final project aimed to evaluate the effectiveness of Lactobacillus sp. probiotics in controlling WFD in a semi-intensive cultivation system at PT. Prima Bakti Sentosa, Padang. The treatment involved two application methods: water probiotic and feeder probiotic, both at a dose of 1,5 ppm per week. Results showed that the highest survival rate (77,33%) was obtained from the feeder probiotic treatment, while the highest average daily gain (ADG) of 0,19±0,02 g/day was achieved with the water probiotic. The Total Vibrio Count in all ponds remained below 10³ CFU/mL, indicating stable water quality. The highest average shrimp weight (32,56 g/shrimp) was also recorded in the water probiotic treatment. These findings suggest that Lactobacillus sp. probiotics are effective in reducing WFD incidence and improving the growth performance of vannamei shrimp.