Fine anatomical structures of the intestine in relation to respiratory function of an air-breathing loach, Lepidocephalichthys guntea (Actinopterygii: Cypriniformes: Cobitidae)

• Autorzy: Ghosh S.H. , Ghosh B. , Chakrabarti P.
• Języki publikacji: EN

Abstrakty

EN

Background. The omnivorous freshwater loach, Lepidocephalichthys guntea (Hamilton, 1822) inhibiting unique ecological niche where oxygen content is low. Its alimentary canal is remarkably short, which is surprising considering the fact that this fish is an omnivore. This peculiarity can be correlated with the specific nature of food. Therefore, the aim of the present study was to investigate the mucosal adaptation of the intestine in adult L. guntea with respective digestive- as well as respiratory function. Materials and Methods. The surface design of the mucosa of different sections (anterior, mid, and posterior) of the intestine of L. guntea were studied using light and scanning electron microscope following commonly accepted procedures. Results. The mucosa of the anterior intestine was provided with various types of mucosal folds and crowded with almost closely oval or rounded columnar epithelial cells with prominent microridges. The irregular mucosal surface of the mid intestine was exemplified by regularly spaced columnar epithelial cells with minute and prominent microridges/microvilli. On the contrary, irregular mucosal folds with stumpy villi were detected in the posterior intestine. The mucosal surface of that region was made up of columnar epithelial cells containing inconspicuous microridges. In that region the submucosa was provided with increasing number of blood vessels. Various cellular elements in the anterior and mid intestine were accordingly adapted to serve the important functions of absorption and gas exchange. However, the arrangement of low mucosal folds and dense blood capillaries in between the folds in the posterior intestine unequivocally suggested its respiratory role. Conclusion. The micro-architectural pattern and cellular architecture of the anterior intestine and middle intestine of L. guntea unequivocally suggests that these two regions are adapted to serve major role of digestion and absorption process. However, major changes that appear in the posterior intestine are considerably reduction of the absorptive area and the penetration of blood capillaries in between the columnar epithelial cells. Therefore, the posterior intestine of L. guntea is probably adapted to suit its role for aerial respiration. However, further investigation is needed the detailed physiological processes involved for aerial respiration in the region concerned.

Słowa kluczowe

EN

anatomical structure; intestine; respiratory function; air-breathing loach; Lepidocephalichthys guntea; Actinopterygii; Cypriniformes; Cobitidae; fish; loach; freshwater loach; digestion; absorption

• Wydawca: -
• Czasopismo: Acta Ichthyologica et Piscatoria
• Rocznik: 2011
• Tom: 41
• Numer: 1
• Opis fizyczny: p.1-5,fig.,ref.

Twórcy

autor

Ghosh S.H.

• Fisheries Laboratory, Department of Zoology, Burdwan University, Burdwan, West Bengal, India

autor

Ghosh B.

autor

Chakrabarti P.

Bibliografia

• Chakrabarti P., Ghosh A.R. 1990. Fine anatomical structures of the different regions of the alimentary canal of Heteropneustes fossilis (Bloch) as revealed by scanning electron microscopy. Zeitschrift fur mikroskopisch-anatomische Forschung 104 (6): 955–968.
• Chakrabarti P., Sinha G.M. 1987. Mucosal surface of the alimentary canal in Mystus vittatus (Bloch): A scanning electron microscopic study. Proceeding of Indian National Science Academy 53 (4): 317–322.
• Clarke A.J.,Witcomb D.M. 1980. A study of the histology and morphology of the digestive tract of the common eel (Anguilla anguilla). Journal of Fish Biology 16 (2): 159–170. DOI: 10.1111/j.1095-8649.1980.tb03695.x
• de Oliveira Ribeiro C.A., Fanta H. 2000. Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae). Revista Brasileira de Zoologia 17 (4): 953–971. DOI: 10.1590/S0101-81752000000400007.
• Gee J.H., Graham J.B. 1978. Respiratory and hydrostatic functions of the intestine of catfishes Hoplosternum thoracatum and Brochis splendens (Callichthyidae). Journal of Experimental Biology 74: 11–16.
• Graham J.B., Baird T.A. 1982. The transition to air breathing in fishes. I. Environmental effects on the facultative air breathing of Ancistrus chagresi and Hypostomus plecostomus (Loricaridae). Journal of Experimental Biology 96: 53–67.
• Huebner E., Chee G. 1978. Histological and ultrastructural specialization of the digestive tract of the intestinal air breather Hoplosternum thoracatum (teleost). Journal of Morphology 157 (3): 301–328. DOI: 10.1002/jmor.1051570305.
• Krementz A.B., Chapman G.B. 1975. Ultrastructure of the posterior half of the intestine of the channel catfish, Ictalurus punctatus. Journal of Morphology 145 (4): 441–481. DOI: 10.1002/jmor.1051450405.
• Mandal D.K., Chakrabarti P. 1996. Architectural pattern of the mucosal epithelium of the alimentary canal of Notopterus notopterus (Pallas) and Oreochromis mossambicus (Peters): A comparative study. Acta Ichthyologica et Piscatoria 26 (1): 15–22.
• McMahon B.R., Burggren W.W. 1987. Respiratory physiology of intestinal air breathing in the teleost fish Misgurnus anguillicaudatus. Journal of Experimental Biology 133: 371–393.
• Mir I.H., Channa A. 2010. A scanning electron microscopic examination of the intestinal tract of the snowtrout, Schizothorax curvifrons Heckel. Journal of Fisheries and Aquatic Science 5 (5): 386–393. DOI: 10.3923/jfas.2010.386.393.
• Mishra K.P., Appa Rao N.V., Alim A., Firoz Ahmad M. 1991. Functional peculiarities of the alimentary canal of Lepidocephalichthys guntea (Hamilton). Journal of the Inland Fisheries Society of India 23 (1): 59–63.
• Moitra A., Singh O.N., Munshi J.S.D. 1989. Microanatomy and cytochemistry of the gastro-respiratory tract of an airbreathing cobitidid fish Lepidocephalichthys guntea. Japanese Journal of Ichthyology 36 (2): 227–231. DOI: 10.1007/BF02914326.
• Park J.Y., Kim I.S. 2001. Histology and mucin histochemistry of the gastrointestinal tract of the mud loach, in relation to respiration. Journal of Fish Biology 58 (3): 861–872. DOI: 10.1111/j.1095-8649.2001.tb00536.x.
• Park J.Y., Kim I.S., Kim S.Y. 2003. Structure and mucous histochemistry of the intestinal respiratory tract of the mud loach, Misgurnus anguillicaudatus (Cantor). Journal of Applied Ichthyology 19 (4): 215–219. DOI: 10.1046/j.1439-0426.2003.00452.x.
• Podkowa D., Goniakowska-Witalińska L. 2002. Adaptations to the air-breathing in the posterior intestine of the catfish (Corydoras aeneus, Callichthyidae). A histological and ultrastructural study. Folia Biologica 50 (1–2): 69–82.
• Sinha G.M. 1983. Scanning electron microscopic study of the intestinal mucosa of an Indian freshwater adult major carp, Labeo rohita (Hamilton). Zeitschrift für mikroskopischanatomische Forschung 97 (6): 979–992.
• Yamamoto T. 1966. An electron microscope study of the columnar epithelial cell in the intestine of fresh water teleosts: goldfish (Carassius auratus) and rainbow trout (Salmo irideus). Zeitschrift für Zellforschung und mikroskopische Anatomie 72 (1): 66–87.