159
Table 10.3 Diversity indices of odonates in GNBR
Location
Richness indices
Diversity indices
Hill’s number
Evenness indices
R 1
R 2
λ
H ′
N 1
N 2
E 1
E 2
Amphibian road
3.83
2.26
0.08
2.58
13.16
12.62
0.93
0.82
B-quarry
1.62
1.28
0.16
1.67
5.31
6.36
0.93
0.88
Gingen Basti
3.90
2.33
0.05
2.66
14.29
18.40
0.96
0.89
Gandhi Nagar
3.34
2.00
0.07
2.53
12.49
15.00
0.96
0.89
East-west road
3.53
2.06
0.05
2.65
14.17
18.23
0.98
0.94
Indira Point
1.66
1.15
0.18
1.75
5.77
5.65
0.90
0.82
Lakshman Beach
1.73
1.41
0.18
1.59
4.88
5.57
0.89
0.81
Mahar Nala
1.92
1.30
0.15
1.92
6.85
6.81
0.93
0.86
Navidera
2.23
1.50
0.10
2.10
8.19
9.66
0.96
0.91
Kopen heat
1.53
1.18
0.17
1.68
5.35
5.82
0.94
0.89
Kondul
1.75
1.26
0.13
1.88
6.55
7.74
0.97
0.94
Table 10.4 Distribution of the odonates in Ritchie’s archipelago
Sl. No. Species name
Islands of Ritchie’s archipelago
Havelock
John
Lawrence
Henry
Lawrence Inglis
South
Button
North
Button
Middle
Button Outram Neil
1.
Vestalis gracilis gracilis
(Rambur)
√
√
√
√
√
2.
Lestes praemorsa
praemorsa (Selys)
√
√
√
√
3.
Prodasineura verticalis
andamanensis (Fraser)
√
√
4.
Copera marginipes
(Rambur)
√
√
√
√
5.
Drepanosticta
annandalei (Fraser)
√
√
6.
Aciagrion pallidum
(Selys)
√
√
7.
Agriocnemis femina
oryzae (Lieftinck)
√
√
√
√
√
8.
Agriocnemis rubescens
(Selys)
√
√
√
9.
Pseudagrion
andamanicum (Fraser)
√
√
√
√
√
10.
Anax guttatus
(Burmeister)
√
√
√
√
11.
Gynacantha hyalina
(Selys)
√
√
12.
Brachydiplax chalybea
chalybea (Brauer)
√
√
13.
Crocothemis servilia
servilia (Drury)
√
√
√
√
√
14.
Diplocodes trivialis
(Rambur)
√
√
√
√
√
(continued)
10 Odonata of Andaman and Nicobar Islands