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Effect of Cd on serum osmolality, ion levels and hematological parameters of tilapia (Oreochromis niloticus) at different salinity levels

Author:
Listiyani, Pramita Adi, Shobirin, Miftachul, Novianti, Eka, Irawan, Bambang, Hariyanto, Sucipto, Soegianto, Agoes
Source:
Zoology and ecology 2018 v.28 no.3 pp. 205-212
ISSN:
2165-8013
Subject:
Oreochromis niloticus, blood serum, cadmium, chlorides, erythrocytes, fish, hematocrit, hemoglobin, osmolality, potassium, salinity, sodium
Abstract:
Effects of cadmium on serum osmolality, ion levels and hematological parameters of tilapia (Orechromis niloticus) were evaluated at different salinities. Serum osmolalities (SOs) in fish unexposed to Cd (0 mg l⁻¹) and exposed to 2.5 mg Cd l⁻¹ were not significantly different at salinities of 0, 5 and 10 g l⁻¹, while at 15 g l⁻¹, SO was significantly higher than at 0, 5 and 10 g l⁻¹. Levels of Na⁺ and Cl⁻ in serum at salinities of 5, 10 and 15 g l⁻¹ were not significantly different; but were significantly higher than those at 0 g l⁻¹ with and without Cd. In media without Cd, the lowest level of K⁺ in serum occurred at 15 g l⁻¹ salinity, whereas levels of K⁺ at 0, 5 and 10 g l⁻¹ were not significantly different. The levels of K⁺ in Cd-exposed fish at all salinities were not significantly different. At 0 g l⁻¹ salinity, hemoglobin, red blood cells, and hematocrit in Cd-exposed fish were significantly lower than controls. At salinities of 5, 10 and 15 g l⁻¹, levels in control and Cd-exposed fish were not significantly different indicating that higher salinity prevented Cd-induced osmotic imbalance and hematological alterations.
Agid:
6158240