Volume : 2, Issue : 5, MAY 2016

REDUCTION OF GERMINAL VESICLE BREAK DOWN IN DANIO FOLLOWING DELTAMETHRIN EXPOSURE

Dr.D.NALINI

Abstract

During the course of maturation, oocytes undergo drastic morphological changes associated with the progression of the meiotic cell cycle, among which breakdown of the oocyte nuclear envelope (germinal vesicle breakdown, GVBD) occurring at the prophase/metaphase transi-tion is usually regarded as a hallmark of the progress of oocyte maturation. As the zebrafish is asynchronous, the ovary contains follicles present in different stages. The present study shows more number of oocytes at GV IV position GVBD) in control and lower concentrations of decis indicates normal progress in oocytes maturation. Less numberof oocytes in Germinal Vesicles IV position GVBD) in higher concentrations of decis indicates delay in oocytes maturation.

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[1] Ashfield L.A., Pottinger T.G., Sumpter J.P., 1998. Exposure of female juvenile rainbow trout to alkylphenolic compounds results in modification to growth and ovosomatic index. Environ. Toxicol. Chem., 17: 679–686. [2] Bateman K.S., Stentiford G.D., Feist S.W., 2004. A ranking system for the evaluation of intersex condition in European flounder (Platichthys esus). Environ. Toxicol. Chem., 23: 2831- 2836. [3] Cheek A.O., Brouwer T.H., Carroll S., Manning S., McLachian J.A., Brouwer M., 2001. Experimental envaluation of vitellogenin as a predictive biomarker for reproductive disruption. Environmental Health Perspectives. 109(7): 681-690. [4] Das M., Dewan S., Debanath S.C., 1989. Studies on fecundity of Heteropneustes fossilis (Bloch) in a minipond of Bangladesh Agricultural University, Mymensingh. Bangladesh J. agric. Sci., 16: 1-6.fish. Aquat. Toxicol., l81: 219-231. [5] Folmer L.C., Denslow N.D., Rao V., Chow M., Crain D.A., Enblom J., Marcino J., Guillette L.R. Jr., 1996. Vitellogenin induction and reduced serum testosterone concentrations in feral male carp (Cyprinus carpio) captured near a major metropolitan sewage treatment plant. Environ. Health Perpect., 104: 1096-1101. [6] Gimeno S., Komen H., Gerritsen A.G.M., Bowmer T., 1998. Feminisation of young males of the common carp, Cyprinus carpio, exposed to 4-tert-pentylphenol during sexual differentiation. Aquat. Toxicol., 43(2–3): 77–92. [7] Hatef A., Alavi S.M H., Abdulfatah A., Fontaine P., Rodina M., Linhart O., 2011. Adverse effects of bisphenol A on reproductive physiology in male goldsh at environmentally relevant concentrations. Ecotoxicology and Environmental Safety. 76(2): 56-62. [8] Ishibashi H., Watanabe N., Matsumura N., Hirano M., Nagao Y., Shiratsuchi H., Kohra S., Yoshihara S., Arizono K., 2005. Toxicitytoearlylifestagesandan estrogenic effectofabisphenol Ametabolite, 4-methyl-2.4-bis (4-hydroxy- phenyl) pent-1-ene on the medaka(Oryzias latipes). Life Sci., 77: 2643-2655. [9] Kang I.J., Yokota H., Oshima Y., Tsuruda Y., Oe T., Imada N., Tadokoro H., Honjo T., 2002. Effects of bisphenol A on the reproduction of Japanese medaka (Oryzias latipes). Environ. Toxicol. Chem., 21: 2394-2400. [10] Kiparissis Y., Balch G.C., Metcalfe T.L., Metcalfe C.D., 2003. Effects of the isoflavones genistein and equol on the gonadal development of Japanese medaka (Oryzias latipes). Environ. Health Perspect., 111: 115 Mandich A., Bottero S., Benfenati E., Cevasco A., Erratico C., Maggioni S., 2007. In vivo exposure of carp to graded concentrations of bisphenol A. Gen. Comp. Endocrinol., 153: 15-24.8 -1163. [11] Larsen B.K., Bjornstad A., Sundt R.C., Taban I.C., Pampanin D.M., Andersen O.K., 2006. Comparison of protein expression in plasma from nonylphenol and bisphenol A-exposed Atlantic cod (Gadus morhua) and turbot (Scophthalmus maximus) by use of SELDI-TOF. Aquat. Toxicol., 78: 25-33. [12] Lindholst C., Pedersen K.L., Pedersen S.N., 2000. Estrogenic response of bispehnol A in rainbow trout (Oncorhynchus mykiss). Aquat. Toxicol., 48: 87-94. [13] Tyler C.R., Beresford N., Van der Woning M., Sumpter J.P., Thorpe K., Metabolism and environmental degradation of pyrethroid insecticides produce compounds with endocrine activities. Environ. Toxicol. Chem., 19: 801-809