Jyotish Barman A. K. Jaiswar S. K. Chakraborty Shrinivas Jahgeerdar W. S. Lakra


An abnormal case of anopthalmia in a striped catfish Mystus tengara (66.8 mm in standard length) from Assam is reported in this communication. Thirty eight morphological characters of the abnormal specimen were also studied and compared with normal specimens to observe variation in the morpho-meristic traits, if any. In the abnormal specimen, the proportionate height of the dorsal fin (31.1 mm) and nasal barbel length (75.9 mm) was found to be higher compared to that of the normal specimens (21.6 – 26.5 mm and 47.9 – 72.5 mm, respectively). While the body depth of anus was higher in case of normal specimens (19.1 – 29.2 mm) compared to abnormal specimen (14.5 mm). However, no marked variation was observed in meristic characters. This anomaly does not seem to have affected morphological aspects. Factors like weed infestation, pesticide and herbicide application adversely affecting the habitat is believed to be the cause of such deformity. The abnormality does not seem to have affected the overall growth of the fish.


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Anopthalmia, Environmental stress, Morphological anomalies, Mystus tengara

Anon (1996). Department of Water Affairs and Forestry, South African Water Quality Guidelines (2nd edition). Volume 6: Agricultural Waste Use: Aquaculture, pp 170.
Babu Rao, M. and Siva Reddy, Y. (1984). On an abnormal catfish Mystus vittatus Bloch, 1794 Pisces: Bagridae with a forked maxillary barbel. Bull. Zool. Surv. India, 61(3): 295 – 296.
Barlow, G.W. (1961). Causes and significance of morphological variation in fishes. Syst. Zool., 10: 105–117.
Bussing, William A. (1966).New species and new records of Costa Rican freshwater fishes with a tentative list of species.Rev. Biol. Trop., 14 (2): 205 – 249.
Cahu, C., Infante, J.Z. and Takeuchi, T. (2003). Nutritional components affecting skeletal development in fish larvae. Aquaculture, 227: 245 – 258. doi:10.1016/S0044-8486(03)00507-6.
Cunningham, M.E., Markle, D.F., Watral, V.G., Kent, M.L. and Curtis, L.R. (2005).Patterns of fish deformities and their associates with trematode cysts in the Williamette River.Oregon. Env. Biol. Fishes, 73: 9 – 19.
Darshan, A., Mahanta, P.C., Barat, A. and Kumar, P. (2013).Redescription of the striped catfish Mystus tengara (Hamilton, 1822) (Siluriformes: Bagridae), India. Journal of Threatened Taxa, 5 (1): 3536 – 3541.
Dawson, C.E. (1964). A bibliography of anomalies of fishes.Gulf Res. Rep. 1, 308 – 399.
Dawson, C.E. (1966). A bibliography of anomalies of fishes, supplement 1.Gulf Res. Rep. 2, 169 – 176.
Dawson, C.E. (1971). A bibliography of anomalies of fishes, supplement 2.Gulf Res. Rep. 3, 215 – 239.
Dawson, C.E. and Heal, E. (1976). A bibliography of anomalies of fishes, supplement 3.Gulf Res. Rep., 5: 35 – 41.
Devadoss, P. (1983). Report on ambicolouration in Flounders. J. Fish Biol., 47(10): 168 – 170. DOI: 10.4194/1303-2712-v13_2_22
Dutta, S.P.S. and Kumar, S. (1991). Deformity in dorsal fin in Puntius conchonius (Ham.) from Jammu. Geobios, New Reports, 5: 173 – 174.
Ferraris, C.J. Jr. (2007). Checklist of catfishes, recent and fossil (Osteichthys: Siluriformes), and catalogue of siluriform primary types. Zootaxa, 1418: 1 – 628.
Fowler, J.A. (1970). Control of vertebral number in teleosts - an embryological problem.Q, Rev. Biol., 45: 148 – 167.
Gluth, G. and Hanke, W. (1983).The effect of temperature on physiological changes in carp, Cyprinus carpio L. induced by phenol. Ecotoxicol. Environ. Saf.,7(4): 373 – 389.
Gupta, S.C., Dutta, S.P.S. and Sharma, N. (2000). A report on some morphological deformities in silver carp Hypophthalmicthy smolitrix (Valenciennes) inhabiting aquatic environment of Jammu (J&K). Himalayan J. Env. And Zool., 14: 25 – 30.
Jayaram, K.C. and Sanyal, A. (2003). A taxonomic revision of the fishes of the genus Mystus Scopoli (Family: Bagridae). Rec. Zool. Surv. India, Miscellaneous Publication, Occasional Paper no. 207: 1–136.
Jayaram, K.C. (2006). Catfishes of India. Narendra Publishing House, Delhi, 383 pp.
Jesu Arockia Raj, A., Seetharaman, S. and Haniffa, M.A. (2004). Skeletal deformities in a few freshwater fishes from Bhavaniriver, Tamil Nadu. Zoo’s Print Journal, 19 (9): 1628 – 1629.
Klumpp, D.W. and Von Westernhagen, H. (1995). Biological effects of pollutants in Australian tropical coastal waters: embryonic malformations and chromosomal aberrations in developing fish eggs. Marine Pollut. Bull., 30: 158 – 165.
Kruitwagen, G., Hecht, H., Pratap, H.B. and WendelaarBonga, S.E. (2006). Changes in morphology and growth of the mudskipper (Periophthalmus argentilineatus) associated with coastal pollution. Mar. Biol., 149: 201– 211. DOI 10.1007/s00227-005-0178-z.
Lin Sun, P.L., Hawkins, W.E., Overstreet, R.M. and Brown Peterson, N.J. (2009).Morphological deformities as biomarkers in fish from contaminated rivers in Taiwan. Int. J. Environ. Res. Public Health, 6: 2307-2331.
Martens, L.G., Witten, P.E., Fivelstad, S., Huysseume, A., Savedreid, B., Vikessa, V. and Obach, A. (2006). Impact of high carbon dioxide on Atlantic salmon smolts (Salmo salar L.): effect on fish performance, vertebral composition and structure. Aquacult, 61(1): 80 – 88.
Nagarajan, M. (2012).Spinal deformities in wild population of Mystus montanus. Int. J. Biological Technology, 3 (3): 23 – 24.
Nakayama, K., Oshima, Y., Nagafuchi, K., Hano, T., Shimasaki, Y. and Nakayamaj, K. (2005). Early-lifestage toxicity in offspring from exposed parent medaka, Oryzias latipes, to mixtures of tributyltin and polychlorinated biphenyls. Environ. Toxicol. Chem., 24: 591–596.
Naserizadeh, M., Safari, O. and Nematollahi, M. A. (2013). First report on the abnormaility among body component ratios in the caught Caspian Sea Mahisefid (Rutilus frissikutum, Kamensky, 1901). Turk. J. Fish. Aquat. Sci., 13: 383 – 387.
Ng, H.H. (2010). Mystus tengara. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013. 2. . Downloaded on 19 March 2014.
Ng, H.H. and Dodson, J.J. (1999). Morphological and genetic descriptions of a new species of catfish, Hemibagrus chrysops, from Sarawak, east Malaysia, with an assessment of phylogenetic relationships (Teleostei: Bagridae). Raff. Bull. Zool., 47: 45 – 57.
Roberts, T.R. (1992). Revision of the striped catfishes of Thailand misidentified as Mystus vittatus, with descriptions of two new species (Pisces: Bagridae). Ichthyol. Explor.Freshw., 3: 77 – 88.
Saha, H. and Saha, R.K. (2013).Occurrence of innate morphological deformities in fishes of Tripura, North East India – A possible case of Inbreeding. World J. Fish & Marine Sci., 5 (4): 405 – 408. DOI: 10.5829/ idosi.wjfms.2013.05.04.7392
Sarkar, H.L. and Kapoor, B.G. (1956).Deformities in some Indian catfishes.J. Zool. Soc. India, 8: 157 – 164.
Subba, B.R. (1999). Multiple abnormalities in African catfish. J. Inst. Agric. Anim. Sci., 19 – 20: 187 – 191.
Subba, B.R. (2008). Abnormality in Bagarius bagarius (Ham.)(Cypriniformes: Sisoridae) from Nepal. Our Nature, 6: 26 – 29.
Tave, D. and Handwerker, T. (1998). Anophthalmia: A non-heritable eye deformity in Oreochromis mossambicus. Ribarstvo, 56 (4): 125 – 130.
Tave, D., Jo, Jae-Yoon.and Kim, D.S. (2011). Gross abnormalities in Tilapia.Fish Aquat. Sci., 14 (2): 148 – 160. DOI 10.1007/s00227-005-0178-z
Teji, K.T. and John Thomas, K. (2006). Observations on the morphological abnormalities in induced bred larvae of some freshwater fishes. Indian J. Fish.,53 (3): 353 – 358.
Turner, J.L. and Farley, T.C. (1971). Effects of temperature, salinity and dissolved oxygen on the survival of striped bass eggs and larvae.Calif. Fish Game, 57: 268 – 273.
Weis, J.S. and Weis, P. (1976). Optical malformations induced by insecticides in embryos of the Atlantic silverside Menidia menidia. Fish. Bull., 74 (1): 208 – 211.
Weis, J.S. and Weis, P. (1989).Effects of environmental pollutants on early fish development. Aquat. Sci., 1: 45-73.
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Barman, J., Jaiswar, A. K., Chakraborty, S. K., Jahgeerdar, S., & Lakra, W. S. (2014). A record of anopthalmia in Mystus tengara (Hamilton, 1822) from Assam. Journal of Applied and Natural Science, 6(2), 589-593. https://doi.org/10.31018/jans.v6i2.501
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