Composition of leukocytes in the hematopoietic organs of Antarctic toothfish
2017
Gordeev, I.I. | Balabanova, L.V. | Suvorova, T.A.
The composition of leukocytes reflects the species and ecological characteristics of fish, and the ratio of cell types — functional state of organism and influence of biotic and abiotic stress factors. Antarctic toothfish Dissostichus mawsoni is one of the largest and valuable representatives of the Nototheniidae in the Antarctic. The present work is devoted to the hemopoiesis of this bottom predator. New data on the composition of leukocytes of hemopoietic organs are given. Specimens were caught in January-February, 2012 in the Ross Sea between 690 and 1183 meters depth. The results of the study showed that the leukocyte formula of the Antarctic toothfish’s immunocompetent organs is dominated by lymphocytes, a significant proportion of blast forms and a small percentage of granulocytes and monocytes / macrophages. In kidneys, as the main organ of hematopoiesis of bony fishes, the content of lymphocytes, granulocytes and monocytes / macrophages is higher, and blast cell forms in the spleen, which performs the function of the «depot» of blood. The data obtained are very important for understanding the direction of morphophysiological reconstructions of the cellular composition of leukocytes in the process of adaptation of fish to deepwater habitats.
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