Effects of malathion on certain aspects of the biology of freshwater eel monopterus cuchia ham buch

Abstract

The present investigation on the effects of malathion on Certain aspects of the biology of freshwater eel, Monopterus cuchia (Ham- Buch) presented in the thesis comprises the following aspects. Chapter-I: This comprises the general introduction of the topic and justification of development of the specific objectives for the present investigation. Considering the demand of Monopterus cuchia, it is urgently required to explore the cause of the dearth of the species from the paddy field and wetlands. The following objectives have been planned 1. Effect of pesticides on the behaviour and growth of the fish. 2. Effects on different haematological parameters ( TEC, TLC, DLC, Hb) 3. Effects on the histological aspects of the kidney, liver, stomach, intestine, skin, gonads etc. 4. Development of eggs during maturity of the ovaries of the fish along with the determination of fecundity of the fish of various ages/sizes. 5. Effect of the quality of the meat of the fish. Chapter-II: A unit review of certain works has been presented. Chapter-III: In this chapter the materials used and methodologies followed are discussed. The details of the use of fish, preparation of solution and others are described in details , together with procurement of fish and their rearing in cement cisterns, feeding, precaution of malathion. The blood parameters such as TCE, TCC, Hb etc. are estimated as described. Routine histological methods are followed in order to examine the organs such as liver, kidney, stomach, intestine, skin, gonads. The reproductive behaviour of the species along with the synthesis of vitellogenis are also attempted. Chapter - IV: In this chapter the effects of malathion on the selected hematological parameters have been described. The impact of malathion (0.06 ml/lit) on the different blood parameters such as TEC, TLC ,Hb and on differential count on eosinophil, neutrophils, basophils, lymphocytes, monocytes have been shown from content as well as in various treated groups. The effect of the sub lethal dose of malathion...