Fine Structure and Function of the Alimentary Canal in Leptocephali of the Japanese Eel <i>Anguilla japonica</i>
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- Otake Tsuguo
- Ocean Research Institute, The University of Tokyo
Bibliographic Information
- Other Title
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- Fine Structure and Function of the Alimentary Canal in Leptocephali of the Japanese Eel Anguilla japonica
- Fine Structure and Function of the Alim
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Abstract
The fine structure of the alimentary canal epithelium in leptocephali of the Japanese eel Anguilla japonica (11.0-47.7mm in total length) was examined. The alimentary canal was histologically divided into three segments: fore-, mid-and hindgut. No size-dependent differences occurred in either morphological or cytological features of the epithelia in each segment. The foregut epithelium comprised flat cells, which lacked any absorptive function, unlike the mid- and hindgut. The midgut absorptive cells were characterized by numerous vacuoles and a highly developed lamellar membranous structure with large, closely associated mitochondria. The development of the lamellar membranous structure suggested that water and solute transport occurred actively in the midgut epithelium. In the hindgut absorptive cells many pinocytotic vacuoles with fine particle inclusions were present in the upper half of the cytoplasm, in addition to many macrophage-like cells distributed under and sometimes intruding into the hindgut epithelium, suggesting that the hindgut is involved in the uptake and intracellular digestion of intact macromolecules.
Journal
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- Fisheries science
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Fisheries science 62 (1), 28-34, 1996
The Japanese Society of Fisheries Science
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Details 詳細情報について
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- CRID
- 1390001204429455488
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- NII Article ID
- 130003902840
- 10004864697
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- NII Book ID
- AA10993718
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- NDL BIB ID
- 3929040
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- ISSN
- 09199268
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed