Kontaminasi Mikroplastik dan Respons Biokimiawi Ikan Nila (Oreochromis niloticus (Linnaeus, 1758)) di Hilir Sungai Winongo, Bantul, Daerah Istimewa Yogyakarta

Sefiansyah Rizqi Fauzi, Prof. Dr. rer. nat. Andhika Puspito Nugroho

2025 | Skripsi | BIOLOGI

Pencemaran mikroplastik telah menjadi isu serius dalam ekosistem perairan karena berpotensi menyebabkan gangguan fisiologis pada organisme akuatik. Penelitian ini bertujuan mengevaluasi kontaminasi mikroplastik dan respons stres oksidatif pada ikan nila (Oreochromis niloticus) melalui pendekatan biomonitoring aktif di Sungai Winongo, Bantul, Daerah Istimewa Yogyakarta. Ikan dipelihara dalam keramba selama 28 hari, dengan pengambilan sampel pada hari ke-0, 3, 7, 14, 22, dan 28. Parameter yang diamati meliputi jenis dan jumlah mikroplastik dalam air (MPair) dan saluran pencernaan ikan (MPGIT), biomarker stres oksidatif di hati (SOD, CAT, H?O?, MDA), serta kondisi lingkungan (kecepatan arus, suhu, dan kadar oksigen terlarut/DO). Mikroplastik yang ditemukan didominasi oleh tipe fiber berwarna biru, baik di air maupun saluran pencernaan ikan. Konsentrasi MPair dan MPGIT meningkat signifikan selama masa paparan (p < 0 xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed>

Microplastic pollution has become a significant concern in aquatic ecosystems due to its potential to disrupt the physiological processes of aquatic organisms. This study aimed to evaluate microplastic contamination and oxidative stress responses in Nile tilapia (Oreochromis niloticus) through an active biomonitoring approach in the Winongo River, Bantul, Yogyakarta Special Region. Fish were caged for 28 days, with sampling conducted on days 0, 3, 7, 14, 22, and 28. Observed parameters included the type and abundance of microplastics in water (MPair) and the gastrointestinal tract of fish (MPGIT), as well as oxidative stress biomarkers in the liver (SOD, CAT, H?O?, MDA), and environmental variables (current velocity, temperature, and dissolved oxygen levels). The dominant microplastics found were blue-colored fibers, which were present in both water and the digestive tracts of fish. Both MPair and MPGIT levels increased significantly over time (p < 0 xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed>

Kata Kunci : mikroplastik, stres oksidatif, ikan nila, Sungai Winongo, biomarker