مجلة جامعة الزيتونة الدولية للنشر العلمي مجلة علمية، محكمة، شهرية، مفتوحة الوصول
Abstract:
In this study, various hematological indices were evaluated in 60 adult Tilapia zillii specimens (mean length 9.66 cm ± 1.21; mean weight 17.52 g ± 7.21). Specimens were collected from Alarabia Company for Agricultural Investments (a freshwater fish farm) and Ain El-Majdob Lagoon (a brackish water lake). Blood samples were obtained using heparinized plastic syringes from the heart. Hematological parameters were measured with standardized, approved methods in a medical analysis laboratory. The following mean values ± SD were recorded: hematocrit (Hct) 11.51 ± 6.09%; hemoglobin (Hb) 7.31 ± 2.38 g/dL; white blood cells (WBC) 57.50 ± 23.23 × 10⁹ cells/L; red blood cells (RBC) 0.82 ± 0.35 × 10⁹ cells/L; mean corpuscular hemoglobin concentration (MCHC) 55.11 ± 17.82 g/dL; mean corpuscular hemoglobin (MCH) 69.60 ± 16.75 pg; mean corpuscular volume (MCV) 134.55 ± 32.91 fl; platelets (PLT) 219.92 ± 206.73 × 10⁹ cells/L; granulocytes (GRA) 6.63 ± 6.03 × 10⁹ cells/L; lymphocytes (LYM) 43.05 ± 19.42 × 10⁹ cells/L; and monocytes (MON) 4.81 ± 3.52 × 10⁹ cells/L.
RBC values approached statistical significance, with RBC, Hb, LYM, MON, MCH, and MCHC levels higher in freshwater Tilapia zillii compared to those in brackish water. Conversely, Hct, GRA, and MCV values were higher in brackish water specimens than in freshwater ones. In freshwater, WBC, LYM, Hct, and MCV decreased with increasing weight but increased with length. Granulocyte and platelet counts, however, increased with weight and decreased with length, as assessed through regression analysis. No significant differences were observed for MON, RBC, Hb, MCH, or MCHC between environments.
In brackish water, WBC counts were influenced by the fish’s length and weight. Additionally, in freshwater, LYM and MON counts increased with weight but decreased with length. No significant changes were found for RBC, Hb, Hct, MCV, MCH, MCHC, or PLT across environments.
Keywords:
Hematology, fresh water, Brackish water,Tilapia Zillii, Benghazi,Libya.
BY :
| Nadia Ali Alrwab Department of Zoology, Faculty of Arts & Sciences, University of Benghazi, Tocra, Libya. | Fatma Rafalah Solieman Department of Zoology, Faculty of Sciences, University of Derna , Derna, Libya. |
