アカフジツボの血球

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書誌事項

タイトル別名
  • Hemocyte of balanomorph barnacle, Megabalanus rosa
  • アカフジツボ　ノ　ケッキュウ
公開日
2003-03
資源種別
journal article
公開者
水産大学校

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説明

Morphological features of the hemocyte in a balanomorph barnacle, Megabalanus rosa, were examined by light microscopy. A single type of the hemocyte, granulocyte, was observed in the hemolymph. This hemocyte was irregular in shape and characterized by both small granules (<0.5 μm in diameter) and developing pseudopodia. The granules were not stained with May-Grünwald or hematoxylin-eosin. Nucleus was round or oval in shape. Lipofusutin-like granules were also observed, suggesting the phagocytic ability of the hemocyte. Hyaloplasm of the hemocyte was positive in DOPA reaction (Phenoloxidase (PO)- positive), but not the granules. The PO activity was also detected in the serum. Since small number of degenerated hemocytes were found in the coagulated hemolymph (gel), the PO in the serum may be originated from the hemocytes. However, the hemocyte and the melanin-pigment were not detected in the gel formed on wounded site of cirri. The total hemocyte count in the hemolymph was 0 to 4.2×103 cells/ ml. Furthermore, the hemocyte-like cell with pseudopodia on the cell surface and locomotive activity was also observed on the parenchyma of cirrus. These results indicate that the hemocytes usually do not circulate in the hemolymph, but settle on the surface of tissues immersed in the hemolymph. Therefore, the hemocytes collected from the hemolymph in this study may detach from the tissue owing to the unknown reason, and the hemocytes do not participate in the coagulation of the hemolymph.

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