ABSTRACT SRI WAHYUNI SALAM. Red Blood Cell Count, Hemoglobin Concentration, Hematocrit, and Erythrocytes Index of Female Swamp Buffalo (Bubalus bubalis). Under direction of HERA MAHESHWARI and ARYANI SISMIN SATYANINGTIJAS. Hematological values of animal can provide information about the status of animal health. This research was conducted to study the red blood cell count, hemoglobin concentration, hematocrit, and erythrocytes index of female swamp buffaloes under physiological status. Four female buffaloes with body weight ranging from 250 kg to 300 kg were used in this research. Blood sampling were performed every two days for ten weeks. Blood sampling was done through the jugular vein every morning and collected by using an EDTA coated tube. The result of this research showed that the red blood cell count was (5.32±1.13) million/mm3, hemoglobin concentration was (10.60±1.14) gram%, hematocrit was (25.49±3.05)%, Mean Corpuscular Volume was (49.81±11.08) fl, Mean Corpuscular Hemoglobin was (20.69±4.39) pg, and Mean Corpuscular Hemoglobin Concentration was (41.82±3.76) gr/dl. Keywords: swamp buffalo, red blood cell, hemoglobin, hematocrit, erythrocytes index ABSTRAK SRI WAHYUNI SALAM. Gambaran Jumlah Sel Darah Merah, Kadar Hemoglobin, Nilai Hematokrit, dan Indeks Eritrosit pada Kerbau Lumpur (Bubalus bubalis) Betina. Dibimbing oleh HERA MAHESHWARI dan ARYANI SISMIN SATYANINGTIJAS. Gambaran darah pada setiap individu hewan dapat memberikan informasi mengenai status kesehatan hewan tersebut. Penelitian ini dilakukan untuk melihat gambaran darah merah meliputi jumlah sel darah merah, kadar hemoglobin, nilai hematokrit, dan indeks eritrosit pada kerbau lumpur betina. Sebanyak empat ekor kerbau betina dengan bobot badan berkisar 250 kg sampai 300 kg digunakan dalam penelitian ini. Pengambilan sampel darah dilakukan setiap dua hari sekali selama sepuluh minggu. Pengambilan darah dilakukan setiap pagi hari melalui vena jugularis dan dikoleksi dengan menggunakan tabung yang telah dilapisi antikoagulan EDTA. Berdasarkan hasil penelitian yang telah dilakukan, diperoleh gambaran darah merah pada kerbau lumpur betina yaitu jumlah sel darah merah sebanyak (5.32±1.13) juta/mm3, kadar hemoglobin sebesar (10.60±1.14) gram%, nilai hematokrit (25.49±3.05)%, Mean Corpuscular Volume (49.81±11.08) fl, Mean Corpuscular Hemoglobin (20.69±4.39) pg, dan Mean Corpuscular Hemoglobin Concentration (41.82±3.76) gr/dl. Kata kunci: kerbau lumpur, sel darah merah, hemoglobin, hematokrit, indeks eritrosit