TOXICITY OF ROTENONE YIELDING PLANT EXTRACTS ON PREDATORY AQUATIC ORGANISMS

TABLE OF CONTENT

Title page                                                                                                        i

Abstract                                                         %0                                                        ii

Certification                                                                                                    iii

Dedication                                                                                                      iv

Acknowledgements                                                                                        v

Table of Content                                                                                             vi

List of Tables                                                                                                  ix

CHAPTER ONE

  • Introduction 1

1.1       Statement of Problem                                                                                     2

1.2       Justification                                                                                         2

1.3       Objectives                                                                                           3

CHAPTER TWO                

  • Literature Review 4

2.1       Pesticides                                                                                            4

2.1.1    Toxicology                                                                                          4

2.1.2    Exposure Time of Pesticide                                                                5

2.1.3    Dose Rate of Pesticidal Application                                                   6

2.1.4    Persistence of Pesticides in the Environment                                     6

2.2       Toxicological Consideration on Aquatic Environment                       7

2.3       Sub-lethal Effects of Pesticides                                                          8

2.4       Composition of Rotenone                                                                   8

2.4.1    Toxicity of Rotenone                                                                         9

2.5       Indigenous Species of Tephrosia                                                        10

2.6       Indigenous Species of Lonchocarpus                                                             11

2.7       Distribution of Aquatic Organisms                                                     11

2.7.1    Clarias gariepinus                                                                               11

2.7.2    Tadpoles                                                                                              12

2.7.3    Crabs                                                                                                   13

2.7.4    Water Tigers                                                                                        13

2.8       Effects of Agrochemicals on Fish                                                      13

CHAPTER THREE                                                                                   

3.0       Materials and Methods                                                                       15

3.1       Collection and Acclimatization of Experimental Test Organisms      15

3.1.2    Collection of Fish Samples                                                                 15

3.2       Sorting of Experimental Test Organisms                                            15

3.3       Sources of Experimental Plant Extracts                                             16

3.4       Experimental procedure                                                                      16

3.4.1    Range Finding Test                                                                             16

3.4.2    Experimental Tanks                                                                           16

3.4.3    Acute Toxicity Test                                                                                        17

3.4.4    Replicates                                                                                            17

3.5       Water Quality Parameters                                                                   17

3.6       Statistical Analysis                                                                              18

CHAPTER FOUR                                                                                       

4.0       Results                                                                                                19

4.1       General Effect                                                                                     19

4.2       Mortality and Survival Data of Experimental Test Organisms          27


CHAPTER FIVE

5.0       Discussion                                                                                           30

5.1       Conclusion                                                                                          31

5.2       Recommendation                                                                                32

References                                                                                          33

 

 


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Updated: February 14, 2016 — 9:57 am

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