Variations in LC50 of some pesticides due to physico-chemical parameters and impact of sevin on neurosecretory cells of a fresh water snail, Thiara lineate
Abstract
Aquatic contamination by pesticides is arising as a result of their extensive use in agriculture and public health programmes. However, indiscriminate use of these pesticides for crop protection causes much damage to the aquatic fauna. The snail an aquatic fauna is economically important which serves as an intermediate host of various trematod parasites, which causes severe diseases to human being as well as domestic animals. The gastropod mollusc, Thiara lineata is a filter feeder at the secondary level of fresh water ecosystem. Hence felt necessary to study alteration in the LC50 and neurosecretion. The acclimatized, healthy, active and approximately same weight and sized mature adult and immature animals, groups of ten snails each were exposed (in Plastic troughs each containing 1 liter of water) to Organochlorine (Endosulfan), Organophosphate (Nuvacron), synthetic pyrethroids (Cymbush) and Carbamate (Sevin). The LC50 values for 24, 48, 72 and 96 hours were calculated. The physico-chemical parameters of water used for holding the animal had temperature between 26-28 0C , pH 7.1 to 7.3, total hardness 140 to 150 ppm and oxygen content of 5.6 to 7 ml/lit. The physico-chemical factors affecting the LC50 like temperature, pH, Salinity and Photoperiodism light and dark hours were studied. During the stress conditions neurosecretions are adversely affected . The snail are exposed to pre determined sub-lethal concentration of sevin(0.913 ppm) for 1,7 and 14 days, simultaneously controls were run. After exposure, It was found that the number of the neurosecretory cells 'A' and 'B' has suddenly discharged neurosecretory material. Neurosecretory material was found to be remaining accumulated in control snails
References
Allison AC. 1978. Current trends in Toxicological research. Proc. I. Intrer. Congress on Toxicol. (Eds.Plaa and Duncan) 387-402.
APHA AWWA and WPCF. 1981. “Standard methods for the examination of water and waste water” 15th edition, American public Health Association, Washington. Baker H. 1925. Anatomy of Handersonia Proc. Acad. Natur. Sci., 77.
Bhatlawande SB. 1989. Effect of pesticide exposure on ecobiology and land snail, Cerrastus moussonious Ph.D. Thesis, Dr.B.A.M. University, Aurangabad, India.
Bodhankar DS. 1984. Effects of pesticides on some ecophysiological aspects of the land slug, Laevicaulis alte. Ph.D. Thesis, Dr. B. A. M. University, Aurangabad, India.
Chaudhari Ravindra D and Kulkarni AB. 1993. Effect of monocrotophos on the protein metabolism of a terrestrial snail, Zootecus insularis. J. Ecotoxicol. Environ. Mounit., 3(2):157-159.
Chaudhari TR, Patil PN, Rao KR, Deshmukh SB and Diwate SG. 1999. Effect of pesticide rogor on some biochemical constituents in fresh water snail, Thiara lineata .Environment and Ecology 17(1):146-148.
Crofts D. 1929. “Halliotis”. Proc. Trans.Liverfool. Biol. Soc. Mem., 29.
Finney DJ. 1971. Probit Analysis. Cambridge university Press London.
Godan D. 1983. Pest slug and snails, Biology and Control. Spinger Verlaq Berlin Heidelberg, New York.
Handerson C, Deckring OH and Trazewell CM. 1960. Trans 2nd Seminar on Biol. Problems in water poll. R.A. Tabt. Samit, Eng. Center 76.
*Kamaldeep K and Toor HS. 1977. Ind. J. Exp.Biol., 15:193.
*Macek KJ, Hutchinson C and Cope OB. 1969. Bull. Enviorn. Contam. Toxicol., 4:174.
Magare SR. 1991. Endocrine regulations in a terrestrial snail, Cerrastus moussonianus. Ph. D. Thesis, Dr. BAMU, Aurangabad.
Magare SR and Kulkarni AB. 1995. Effect of paradox on the brain neurosecretory profile of the snail Cerastus moussonianus, Bull. Ass. Zool., 2(1):47-51.
Mallory F. 1944. Physiological techniques, Philadelphia, W.B. Saunders, Co.
Mortan JE. 1956. Evaluation of Perrissodonataand Tylosporia Trans. Rey. Soc., 83:515-524.
Muley EV. 1974. Biology of the snail, Melania scabra. Ph.D. Thesis, Marathwada University, Aurangabad.
Nagabhushanam R and Muley EV. 1976. Neurosecretory phenomena in the freshwater prosobranch, Melania Scabra. Natural Science Journal Marathwada University, Aurangabad, Vol. XV Sci., 8:221-224.
Nagabhushanam R and Kulkarni AB. 1971. Neurosecretion in the land slug, Laevicaulis alte. Proc. Indian Acad. Sci., 73:290-302.
Patil HZ and Mahale PN. 2010. Toxicity effect of mercury chloride on the freshwater Gastropod, Indoplanorbis exustus.Journal of Ecobiotechnology, Vol-2/8:21-24.
Patil PN, Rao KR, Sasane SR, Vedpathak AN, Shejule KS and Chaudhari TR. 1993. Impact of Zolone on the organic constituents of the freshwater gastropod, Thiara lineata from Panzara river at Dhule. Proc. Acad. Environ. Biol., 2(2):193-197.
Patil VT, Kulkarni AB and Shinde SV. 1991. Seasonal LC50 variations in monochrotophos exposed snail, Indoplanorbis exustus. J. Ecotoxicol Environ. Mount., 1(4):321-324.
*Pickering OH, Handerson C and Lemke AE. 1962. Trans. Am. Fish. Soc., 91:175.
Reddy TS. 1982. Studies on sexual biology of Caridina weberi. Ph.D. Thesis, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad.
Scharrer E and Scharrer B. 1954. Neurosecretion Mollendroff‟s Hooch Mikr. Anant. 6 :953-1066, Springer, Berlin.
Shinde SV. 1991. Neuroendocrinology and reproductive physiology of a fresh water snail, Indoplanorbis exustus(Deshayes) Ph. D. Thesis, Dr. BAMU, Aurangabad, India.
Van Der Schalie H and Dundee D. 1956. Morphology of Pomatiopsis cincinnatiesis. Occ. Pa. Mus. Zoo. Univ. Michigan. 576.
Utkar VN. 1982. The studies on endocrine mechanisms in gastropod mollusks. Ph. D. Thesis, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, India.
Utkar VN and Kulkarni AB. 2000. Effect of heavy metals on neurosecretory cells of a freshwater Prosobranch snail, Ballamya bengaliensis. Environmental Issues and Sustainable Development Vinit Publications, Aurangabad. 10-12.
