The present investigation reports the variation observed in morphological traits of an anopthalmic specimen of Sperata seenghala (Sykes, 1839) (168.9 mm in standard length) from Assam. Thirty morphometric and six meristic characters of the abnormal specimen were studied and compared with normal specimens to observe variation in the morpho-meristic traits, if any. The proportionate pre-pectoral length (28.5 mm), length of dorsal fin base (15.0 mm), pelvic fin length (15.5 mm), distance between urino-genital openings and anal fin base (14.0 mm) and body depth at pectoral fin base (12.0 mm) of the abnormal specimen was found to be higher compared to that of the normal specimens (23.8 â€“ 26.5 mm; 12.2 â€“ 14.1 mm; 11.1 â€“ 14.7 mm; 10.9 â€“ 12.4 mm and 8.9 â€“ 9.9 mm, respectively); while the dorsal to adipose
distance (12.8 mm) and body width at cleithrum (41.5 mm) was lower than the normal specimens (13.7 â€“ 16.7 mm and 44.0 â€“ 50.0 mm, respectively). No marked variation was observed in the meristic characters. Pollution due to urban runoff, sewage discharge and oil spill from inland water transport facilities adversely affecting the river water quality could be the reason for such deformity. The overall growth performance of the fish does not seem to be affected by these anomalies.
Anopthalmia, Assam, Environmental stress, Morpho-meristic traits, Sperata seenghala
Barlow, G.W. (1961). Causes and significance of morphological variation in fishes. Syst. Zool., 10: 105â€“117.
Barman, J., Jaiswar, A.K., Chakraborty, S.K., Jahgeerdar, S. and 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.
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 â€“ 249.
Cahu, C., Infante, J.Z. and Takeuchi, T. (2003). Nutritional components affecting skeletal development in fish larvae. Aquaculture, 227: 245 â€“ 258.
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 â€“ 19.
Ferraris, C.J. Jr. and Runge, K.E. (1999). Revision of the South Asian Bagrid catfish genus Sperata, with the description of a new species from Myanmar. Proc. Calif. Acad. Sci., 51 (10): 397-424.
Fowler, J.A. (1970). Control of vertebral number in teleosts - an embryological problem. Q, Rev. Biol., 45: 148 â€“ 167.
Gupta, S.C., Dutta, S.P.S. and Sharma, N. (2000). A report on some morphological deformities in silver carp Hypophthalmicthys molitrix (Valenciennes) inhabiting aquatic environment of Jammu (J&K). Himalayan J. Env. and Zool., 14: 25 â€“ 30.
Jesu Arockia Raj, A., Seetharaman, S. and Haniffa, M.A. (2004). Skeletal deformities in a few freshwater fishes from Bhavani river, Tamil Nadu. Zooâ€™s Print Journal, 19 (9): 1628 â€“ 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 â€“ 165.
Kruitwagen, G., Hecht, H., Pratap, H.B. andWendelaar- Bonga, S.E. (2006). Changes in morphology and growth of the mudskipper (Periophthalmus argentilineatus) associated with coastal pollution. Mar. Biol., 149: 201â€“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 â€“ 88.
Nagarajan, M. (2012). Spinal deformities in wild population of Mystus montanus. Int. J. Biological Technology, 3 (3): 23 â€“ 24.
Nakayama, K., Oshima, Y., Nagafuchi, K., Hano, T., Shimasaki, Y. and Nakayamaj, K. (2005). Early-life-stage toxicity in offspring from exposed parent medaka, Oryzias latipes, to mixtures of tributyltin and polychlorinated biphenyls. Environ. Toxicol. Chem., 24: 591â€“596.
Naserizadeh, M., Safari, O. and Nematollahi, M.A. (2013). First report on the abnormality among body component ratios in the caught Caspian Sea Mahisefid (Rutilus frissikutum, Kamensky, 1901). Turk. J. Fish. Aquat. Sci., 13: 383 â€“ 387.
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 â€“ 88.
Saha, H. and Saha, R.K. (2013). Occurrence of innate morphological deformities in fishes of Tripura, North East Indiaâ€“A possible case of Inbreeding. World J. Fish & Marine Sci., 5(4): 405 408. DOI:10. \ 5829idosi. wjfms. 2013.05.04.7392.
Sarkar, H.L. and Kapoor, B.G. (1956). Deformities in some Indian catfishes. J. Zool. Soc., India, 8: 157 â€“ 164.
Subba, B.R. (1999). Multiple abnormalities in African catfish. J. Inst. Agric. Anim. Sci.,19 â€“ 20: 187 â€“ 191.
Subba, B.R. (2008). Abnormality in Bagarius bagarius (Ham.) (Cypriniformes: Sisoridae) from Nepal. Our Nature, 6: 26 â€“ 29.
Tave, D. and Handwerker, T. (1998). Anophthalmia: A nonheritable eye deformity in Oreochromis mossambicus. Ribarstvo, 56 (4): 125 â€“ 130.
Tave, D., Jo, Jae-Yoon.and Kim, D.S. (2011). Gross abnormalities in Tilapia. Fish Aquat. Sci., 14 (2): 148 â€“ 160. DOI 10.1007/s00227-005-0178-z.
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 â€“ 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 â€“ 211.
Weis, J.S. and Weis, P. (1989). Effects of environmental pollutants on early fish development. Aquat. Sci., 1: 45-73.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)