Abstract
In vertebrates haematological parameters are of considerable importance in the diagnosis of pathological disorders due to pollutants. Similar haematological studies in invertebrates are lacking. This is partly because a very few species have erythrocytes; arcid clams, however, are unique in having erythrocytes. Our experiments were designed therefore to evaluate the effect of naphthalene (N) on haematological parameters in the tropical arcid blood clam Anadara granosa L. The parameter studied were haemoglobin (Hb), erythrocyte sedimentation rate (ESR), haematocrit, erythrocyte fragility, haemolymph cations, free amino acids and osmolality. On exposure to naphthalene (N) in the sublethal range (5 to 15 μg ml-1) Hb content decreased appreciably (P<0.001) compared with controls. Although ESR increased significantly (P<0.001), haematocrit decreased by 17 to 37%. Treatment with N for 96 h increased erythrocyte fragility and haemolysis; the latter by more than 40%. Both inorganic phosphate and free fatty acids increased with ambient concentration of N. Haemolymph cations — K, Ca and Mg increased significantly in relation to control. Na decreased, but not significantly. Free amino acids decreased significantly (P<0.001) with the ambient concentration of naphthalene, but haemolymph osmolality was not effected.
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Communicated by O. Kinne, Oldendorf/Luhe
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Eapen, J.T., Patel, B. Haematological evaluation of naphthalene intoxication in the tropical arcid blood clam Anadara granosa . Marine Biology 100, 223–226 (1989). https://doi.org/10.1007/BF00391962
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DOI: https://doi.org/10.1007/BF00391962