A PRELIMINARY STUDY OF FAUNAL

DIVERSITY IN MADIWALA LAKE;

BANGALORE

Vimala Ashok Mani

First Year B.Sc. Student, Christ University, Bangalore

Dr Antoney P U

Email:antony.pu@christuniversity.in

INTRODUCTION

• 30 years ago, Bangalore, known as the city of lake

• 262 lakes then

• Subsequent reduction to 81

• Recreational, educational, scientific, aesthetic, spiritual and cultural values

• Environmental decisions taken on limited information becomes misleading

• Planning for the management of wild life

OBJECTIVES

• Collection of preliminary data about the

biodiversity

• Land cover change

• Human intervention

• Restoration of the lake

• To foster awareness among the urban dwellers

STUDY AREA

MADIWALA LAKE

TOTAL AREA 114.3 Hectare

LOCATION BTM Layout at 12° 54' 28" North, 77° 37' 0" East in Bangalore city

FULL TANK LEVEL 94.50 HA

MAXIMUM WATER LEVEL 95.50 RL

TOTAL WATER SPREAD AREA 7,50,803 sq. m

TOTAL WETLAND AREA 24.74 acres.

WATER HOLDING CAPACITY 22,36,737 cubic meters

UNDER THE ADMINSTARTION OF Karnataka State Forest Department

METHODOLOGY

• The Study area was visited 8 times during August-December

• Basic data such as location, boundaries and zoogeography were collected

• Life forms in the area were observed

• An enquiry about the human interventions

• Visits to the nearby dhobi Ghats, fishery department, pollution control board

• Boating was undertaken in order to study the birds and the water plants in the lake

RESULTSBIRDS SCIENTIFIC NAMES

1 Spot billed Pelican Pelecanus philippensis

2 Ashy Prinia Pelecanus philippensis

3 Dab Chicks Tachybaptus ruficollis

4 Spot billed duck Anas poecilorhyncha

5 Little cormorants Phalacrocorax niger

6 Pond heron Ardeola grayii

7 Brahmny Kites Haliastur indus

8 Grey heron Ardea cinerea

9 Pariah kite Milvus migrans

10 Purple moorhen Porphyrio porphyrio

11 Cattle egret Bubulcus ibis

12 Little egret Egreta garzetta

13 Pied bush chat Saxicola caprata

14 River tern Sterna aurantia

15 Indian Moorhen Gallinula chloropus

16 Darter Anihinga rufa

17 Jungle myna Acridotheres fuscus

18 Blyth's reed warbler Acrocephalus dumetorum

19 White breast kingfisher Halcyon smyrnesis

20 Sunbird

21 House crow Corvus splendens

22 Pied kingfisher Ceryle rudis

23 Large pied wag-tail Motacilla maderaspatensis

24 Rose ringed parakeet Psittacula krameri

25 Indian robin Saxicoloides fulicatus

Fishes Scientific names

1 Common carp Cyprinus carpio

2 Silver carpHypophthalmichthys molitrix

3 Tilapia Oreochromis niloticus

4 Mrigal Cirrhunus cirrhosus

5 Murrels Channa marulius

6 Gangetic leaffish Nandus nandus

7 Mola Amblypharyngodon mola

8 Catfishes Heteropneustes fossilis)

Reptiles water sankes

Amphibians Frog

Arthropods

A)Spiders

1. Signature Spiders Argiope anasuja

2 water Spiders Argyroneta aquatica

B)Butterflies

1 Angled Castor Ariadne ariadne

2 Common Castor Ariadne merione

3 Commander Moduza procris

4 Pea Blue Lampides boeticus

5 Lemon Pancy Junonia lemoniae

6 Common Grass Yellow Eurema hecabe

7 One Spot Grass Yellow Eurema sari

C)Dragonflies

1 Clubtailed Dragonfly

2 Blue Dragonfly

3 Brown hawker

4 Blue tailed Damsefly

D)Others

1 Larval Stages of Butterflies and Spiders

2 Bees,Wasps,Beetles

DISCUSSION

• Madiwala lake is a home to many migratory birds

• Earlier 374 acres, but now only 273 acres remain

• Certain parts of the lake being dried up and polluted

• Lake receives sewage and storm water from surroundings localities and from

Bommanahally CMC area Kodichikkanahally side

• The lake is dirty ,full of hyacinth weeds

• Contaminated sediments threaten creatures in the benthic environment

• Change in the Lake water quality, decline in fisheries, poverty prevalence and migration of

the local fishing community

• Domestic sewage , industrial waste, detergents, etc. results in Eutrophication

• Faecal contamination enhancing the multiplication of Coliform bacteria

During August During December

A GLIMPSE OF HUMAN INTERVENTIONS

CONCLUSIONSIMMEDIATE RESTORATON STRATEGIES INCLUDE

• 1. Cleaning the floating weeds

• 2. Rehabilitation of Washer men

• 3. Focus on bank vegetation

• 4. Identify and fence its boundary

• 5. Providence of toilet facilities to slum dwellers

• 6.Detritivorous fishes, turtles etc. could be introduced.

• 7. Adequate local community involvement

• 8. Monitoring the illegal dumping of Plastic bags, Chemicals, Organic wastes

• 9. Prohibiting fishing without permit by the local people

ACKNOWLEDGEMENT

My sincere gratitude to • Lake 2010• Forest Department • Pollution Control Board• Dr P U Antony