Occurrence of functional single-lobed ovary in Cirrhinus mrigala (Hamilton,1822) brood fish from Assam, India
Article Main
Abstract
Occurrence of abnormally developed gonads in fish is rather more uncommon in freshwater fish than marine fish. It is therefore worthwhile to disseminate the information of occurrence of a single-lobed ovary in Cirrhinus mrigala brood fish as an abnormal phenomenon. During April 2011 to March 2013, around 500 brood fish samples of Indian major carps (Labeo rohita, Catla and C. mrigala) were collected from different government and private fish farms of Assam and Tripura located in the Northeast of India. Among them, one C. mrigala specimen measuring 41 cm in total length and 640 g in weight collected from Ulubari fish seed farm of Guwahati, Assam during June, 2012 was found to have a single-lobed ovary instead of the normal bilobed structure. The ovary occupied the entire body cavity and the majority of ova were round and translucent. The ovary contributed substantially to the total body weight with gonado-somatic index of 32.81 which was the highest among all the mrigal specimens examined. The study indicates possibility of artificially inducing development of single-lobed ovary in C. mrigala for achieving possible higher spawn outputs in induced breeding of the cultivable species.
Article Details
Article Details
Abnormal ovary, Brood fish, Cirrhinus mrigala, Single-lobed ovary
Bensam, P. (1968). Further instance of gonadial peculiarities in Sardinella longiceps Valenciennes. J. Mar. Biol Ass. India 10: 172-173.
Biswas, S. P. (1993). Manual of methods in fish biology. South Asian Publishers Pvt. Ltd, New Delhi, India, 157 pp.
Chacko, P. I., Krishnamoorthy, B. (1949). Hermaphroditism in the Indian shad Hilsa ilisha (Hamilton). Proc. 36th Indian Sci. Congr. Abst. 167 pp.
Dawson, C. E. (1964). A bibliography of anomalies in fishes. Gulf Res. Repts. 1: 308-399.
Dawson, C. E. (1966). A bibliography of anomalies in fishes. Gulf Res. Repts. Suppl.1, 2: 169-239.
Dawson, C. E. (1971). A bibliography of anomalies in fishes. Gulf Res. Repts. Suppl. 2, 3: 215-239.
Dawson, C. E., Heal, E. (1976). A bibliography of anomalies in fishes. Gulf Res. Repts. Suppl. 3, 5: 35-41.
Desai, V. R., Rao K. J. (1971). On the retardation of gonadial development due to excessive adiposity in Cirrhinus mrigala (Hamilton). J. Inland Fish. Soc. India 3: 125-126.
Dhulkhed, M. H. (1966). On an unusual ovary of the Indian oil sardine Sardinella longiceps Valenciennes. J. Mar. Biol. Ass. India 7: 210-212.
Fuzzen, M.L.M., Bernier, N.J. and Kraak, G.V.D. (2011). Stress and reproduction. In: Hormones and Reproduction of Vertebrates, Vol. 1 : Fishes (eds. Norris, D.O. and Lopez, K.H.), Academic Press, Elsevier, USA, pp. 103-117.
Hickey, C. R. (1972). Common abnormalities in fishes, their causes and effects. Technical Report No. 0013, New York Ocean Science Laboratory, pp. 11-15.
Kraak, G.V.D., Chang, J.P. and Janz, D.M. (1998). Reproduction. In: The Physiology of Fishes, 2nd Edition (ed. Evans, D.H.), CRC Press, USA, pp. 465-488.
Lagler K. F., Bardach J. E., Miller R. R. (1962). Ichthyology. Wiley International Edition, Wiley, New York.
Lal Mohan, R. S. (1970). Gonadial abnormalities in the sciaenid fish, Pennahia aneus (Bloch). J. Mar. Biol. Ass. India 12: 163-165.
Mylonas, C.C. and Zohar, Y. (2001). Use of GnRHa-delivery systems for the control of reproduction in fish. Rev. Fish Biol. Fish., 10: 463-491.
Nayak, P. D. (1959). Occurrence of hermaphroditism in Polynemus heptadactylus Cuvier & Valenciennes. J. Mar. Biol. Ass. India 1: 257-258.
Prabhu, M. S., Antony Raja, B. T. (1959). An instance of hermaphroditism in Indian mackerel Rastrelliger canagurta (Cuvier). Curr. Sci. 23: 73-74.
Pradhan, L. B., Palekar V. C. (1956). Key to the stages of sexual maturity of Rastrelliger kanagurta. Indian J. Fish 3: 183-185.
Raju, G. (1960). A case of hermaphroditism and some other gonadial abnormalities in the skipjack Katsuwonus pelamis (Linnaeus). J. Mar. Biol. Ass. India 2: 95-102.
Rao, K. V. (1962). A note on a hermaphroditic gonad in the Indian mackerel Rastrelliger kanagurta (Cuvier). J. Mar. Biol. Ass. India 4: 241-243.
Talwar, P. K., Jhingran, A. G. (1991). Inland fishes of India and adjacent countries (Vols. 1&2). Oxford and IBH Publishing Co. Pvt. Ltd., New Delhi, 1158 pp.
Thomas, P. T., Raju, G. (1964). Gonadial abnormalities in scombroid fishes. Proc. Symposium on Scombroid Fishes. Marine Biological Association of India, Mandapam Camp, pp. 719-724.
Urbatzka, R., Rocha, M.J. and Rocha, E. (2011). Regulation of ovarian development and function in teleosts. In: Hormones and Reproduction of Vertebrates, Vol. 1 : Fishes (eds. Norris, D.O. and Lopez, K.H.), Academic Press, Elsevier, USA, pp. 65-82.
This work is licensed under Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) © Author (s)
