Morphohistological characteristic of digestive tract of an endemic cichlid fish, Iranocichla hormuzensis Coad, 1982 (Teleostei: Cichlidae)

Mina Hojat Ansari, Mehregan Ebrahimi, Hamid Reza Esmaeili


Objective of the current study was to investigate morphohistology of digestive tract of Iranocichla hormuzensis, one of two native cichlid fishes in Iran. The species present omnivorous feeding habits and restricted in shallow, high temperatures and high salinity water in Mehran River and its drainages. This species has a terminal mouth with several rows of serrated incisive teeth, which covered the upper and lower lips. Esophagus is a short tubular between pharynx and stomach, stomach is relatively small and sac-shape, and intestine is long. Gastric wall, through the digestive tube, consists of four layers of mucosa, submucosa, muscularis, and serosa with some characters specialized for each organ, such as a well-developed mucosa layer and numerous goblet cell in the ventral section of stomach. Morphohistology of digestive tract of I. hormuzensis supports its generalist diet.


Cichlids, Morphohistology, Digestive tube, Omnivore.

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Al-Hussaini A.H. (1949). On the functional morphology of the alimentary tract of some fish in relation to differences in their feeding habits: anatomy and histology. Quarterly Journal of Microscopical Science, 3: 109-139.

Albrecht M.P., Ferreira M.F.N., Caramaschi E.P. (2001). Anatomical features and histology of the digestive tract of two related neotropical omnivorous fishes (Characiformes: Anostomidae). Journal of Fish Biology, 58: 419-430.

Arman S., Ucuncu S.I. (2017). Histochemical characterization of convict cichlid (Amatitlania nigrofasciata) intestinal goblet cells. Pakistan Journal of Zoology, 49: 417-424.

Banan Khojasteh S.M. (2012). The morphology of the post-gastric alimentary canal in teleost fishes: a brief review. International Journal of Aquatic Science, 3: 71-88.

Bancroft J.D., Stevens A. (1990). Theory and practice of histological techniques, 3rd. Churchill Living stone, New York. 740 p.

Canan B., Do Nascimento W.S., Da Silva N.B., Chellappa S. (2012). Morphohistology of the digestive tract of the damsel fish Stegastes fuscus (Osteichthyes: Pomacentridae). The Scientific World Journal, 787319.

da Silva M.R., Natali M.R.M., Hahn N.S. (2012). Histology of the digestive tract of Satanoperca pappaterra (Osteichthyes, Cichlidae). Acta Scientiarum. Biological Sciences, 34: 319-326.

Darrin Hulsey C. (2006). Function of a key morphological innovation: fusion of the cichlid pharyngeal jaw. Proceedings of the Royal Society B: Biological Sciences, 273: 669-675.

Esmaeili H.R., Ganjali Z., Monsefi M. (2009). Reproductive biology of the endemic Iranian cichlid, Iranocichla hormuzensis Coad, 1982 from Mehran River, southern Iran. Environmental Biology of Fishes, 84: 141-145.

Esmaeili H.R., Sayyadzadeh G., Seehausen O. (2016). Iranocichla persa, a new cichlid species from southern Iran (Teleostei, Cichlidae). ZooKeys, 636: 141-161.

Fryer G., Iles T.D. (1972). Cichlid fishes of the great lakes of Africa. Oliver and Boyd Press, Scotland. 641 p.

Fugi R., Agostinho A.A., Hahn N.S. (2001). Trophic morphology of five benthic-feeding fish species of a tropical floodplain. Revista Brasileira de Biologia, 61: 27-33.

Gargiulo A.M., Dall'Aglio C., Tsoku Z., Ceccarelli P., Pedini V. (1996). Morphology and histology of the oesophagus in a warmwater tilapiine fish (Teleostei). Journal of Applied Ichthyology, 12: 121-124.

Ghosh S.K., Chakrabarti P. (2015). Histological and histochemical characterization on stomach of Mystus cavasius (Hamilton), Oreochromis niloticus (Linnaeus) and Gudusia chapra (Hamilton): Comparative study. The Journal of Basic and Applied Zoology, 70: 16-24.

Gurr E. (1962). Staining animal tissues: practical and theoretical. Leonard Hill, London. 631 p.

Hahn N.S., Cunha F. (2005). Feeding and trophic ecomorphology of Satanoperca pappaterra (Pisces, Cichlidae) in the Manso reservoir, Mato Grosso state, Brazil. Brazilian Archives of Biology and Technology, 48: 1007-1012.

Kalhoro H., Tong S., Wang L., Hua Y., Volatiana J.A., Shao Q. (2018). Morphological study of the gastrointestinal tract of Larimichthys crocea (Acanthopterygii: Perciformes). Zoologia, 35: e25171.

Kocher T.D. (2004). Adaptive evolution and explosive speciation: the cichlid fish model. Nature Reviews Genetics, 5: 288-298.

Kullander S.O. (2003). Family cichlidae, in: Reis, R.E., Kullander, S.O., Ferraris, C.J. (Eds.). Check list of the freshwater fishes of South and Central America. Edipucrs. Brazil. pp: 605-654.

Manjakasy J.M., Day R.D., Kemp A., Tibbetts I.R. (2009). Functional morphology of digestion in the stomachless, piscivorous needlefishes Tylosurus gavialoides and Strongylura leiura ferox (Teleostei: Beloniformes). Journal of Morphology, 270: 1155-1165.

Monsefi M., Gholami Z., Esmaeili H.R. (2010). Histological and morphological studies of digestive tube and liver of the Persian tooth-carp, Aphanius persicus (Actinopterygii: Cyprinodontidae). Journal of Biology, 69: 57-64.

Morrison C.M., Wright J.R. (1999). A study of the histology of the digestive tract of the Nile tilapia. Journal of Fish Biology, 54: 597-606.

Motta P.J. (1984). Mechanics and functions of jaw protrusion in teleost fishes: a review. Copeia, 1984: 1-18.

Osman A.H.K., Caceci T. (1991). Histology of the stomach of Tilapia nilotica (Linnaeus, 1758) from the River Nile. Journal of Fish Biology, 38: 211-223.

Purushothaman K., Lau D., Saju J.M., Lunny, D.P., Vij S., Orbán L. (2016). Morpho-histological characterisation of the alimentary canal of an important food fish, Asian seabass (Lates calcarifer). PeerJ, 4: e2377.

Rodrigues S.S., Menin E. (2008). Anatomia do tubo digestivo de Salminus brasiliensis (Cuvier, 1817) (Pisces, Characidae, Salmininae). Biotemas, 21: 65-75.

Rønnestad I., Yúfera M., Ueberschär B., Ribeiro L.A., Sæle Ø., Boglione C. (2013). Feeding behaviour and digestive physiology in larval fish: current knowledge, and gaps and bottlenecks in research. Reviews in Aquaculture, 5: 59-S98.

Santos A.F.G.N., Santos L.N., Araújo F.G. (2011). Digestive tract morphology of the Neotropical piscivorous fish Cichla kelberi (Perciformes: Cichlidae) introduced into an oligotrophic Brazilian reservoir. Revista de Biología Tropical, 59: 1245-1255.

Schwarzer J., Shabani N., Esmaeili H.R., Mwaiko S., Seehausen O. (2017). Allopatric speciation in the desert: diversification of cichlids at their geographical and ecological range limit in Iran. Hydrobiologia, 791: 193-207.

Streelman J.T., Albertson R.C. (2006). Evolution of novelty in the cichlid dentition. Journal of Experimental Zoology, Part B: Molecular and Developmental Evolution, 306B: 216-226.

Takashima F., Hibiya T. (1995). An atlas of fish histology: normal and pathological features. Kodanska. Stuttgart, New York. 195 p.


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