ON THE KIDNEY AND THE ADRENOCORTICAL TISSUE OF TOOTHED SMELT, OSMERUS MORDAX DENTEX AND SURF SMELT, HYPOMESUS PRETIOSUS JAPONICUS AND THEIR COLD ADAPTATION (Twelfth Symposium on Polar Biology)
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概要
- 論文の詳細を見る
The kindneys and the adrenocortical tissues of toothed smelt, Osmerus mordax dentex and surf smelt, Hypornesus pretiosus japonicus were investigated by light microscopy. Their kidneys, which are glomerular, show no changes in the Bowman's capsules and glomeruli between the fishes caught in summer and those in winter. In contrast, the saffron cod, Eleginus gradlis previously observed, showed seasonal difference of the glomerulus which is considered related to the conservation of antifreeze serum glycoprotein. The present results suggest that toothed smelt and surf smelt possess a different adaptive mechanism for cold water from that of the saffron cod. The adrenocortical tissue is located around the posterior cardinal veins in the head kidney. No seasonal difference in the cross-sectional areas of the nuclei of adrenocortical cells was observed in either the toothed smelt or the surf smelt. It is concluded that the adrenocortical cells are probably not related directly to cold adaptation in these fishes.
- 国立極地研究所の論文
著者
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Fukuda Mayumi
Faculty Of Education Saitama University
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Ogawa Mizuho
Graduate School Of Policy Science Saitama University
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Fukuchi Mitsuo
National Inst. Of Polar Res. Kaga Tokyo 173-8515 Jpn
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HAYASHIDA Ayumi
Faculty of Education, Saitama University
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Hayashida Ayumi
Faculty Of Education Saitama University
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Fukuchi Mitsuo
National Inst. Of Polar Res. 10-3 Midori-cho Tachikawa Tokyo 190-8518 Jpn
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