AnnexeII
-51Tableau -2- Calcul des fréquences, densités et biomasses (Dn et Dw) et de l’indice de diversité des espèces associées
à T.torpedo à Skikda
Genre espèce
qi
W (kg)
SS+
Fr %
Dn
Dw
qi/Q
log2
(qi/Q)
qi/Q)*log2
(qi/Q)
wi/W
log2
(wi/W)
(wi/W)*lo
g2 (wi/W)
Argyropelecus hemigymnu
61
6.9
1
100
79.6464
9.0092
0.0233
-5.4241
-0.1263
0.0409 -4.6130
-0.1885
Balistes carolinensis
3
0.61
1
100
3.9170
0.7965
0.0011
-9.7698
-0.0112
0.0036 -8.1128
-0.0293
Boops boops
12
0.92
1
100
15.6681
1.2012
0.0046
-7.7698
-0.0356
0.0054 -7.5199
-0.0410
Capros aper
801
64.5
1
100
1045.8489 84.2163 0.3058
-1.7091
-0.5227
0.3820 -1.3884
-0.5304
Citharus macrolepidotus
104
2.12
1
100
135.7906
2.7680
0.0397
-4.6544
-0.1848
0.0126 -6.3156
-0.0793
Conger conger
29
1.76
1
100
37.8647
2.2980
0.0111
-6.4968
-0.0719
0.0104 -6.5841
-0.0686
Dasyatis pastinaca
1
0.09
1
100
1.3057
0.1175
0.0004
-11.3548
-0.0043
0.0005 -10.8736
-0.0058
Illex spp
1
0.04
1
100
1.3057
0.0522
0.0004
-11.3548
-0.0043
0.0002 -12.0435
-0.0029
Lepidotrigla cavillone
1
0.02
1
100
1.3057
0.0261
0.0004
-11.3548
-0.0043
0.0001 -13.0435
-0.0015
Lithognathus mormyrus
3
0.28
1
100
3.9170
0.3656
0.0011
-9.7698
-0.0112
0.0017 -9.2361
-0.0153
Macrorhamphosus scolopax
231
10.3
1
100
301.6119
13.4485 0.0882
-3.5031
-0.3090
0.0610 -4.0351
-0.2461
Mullus barbatus
706
32
1
100
921.8094
41.7817 0.2696
-1.8913
-0.5098
0.1895 -2.3996
-0.4548
Myliobatis aquila
41
1.9
1
100
53.5328
2.4808
0.0157
-5.9972
-0.0939
0.0113 -6.4736
-0.0728
Pagellus erythrinus
278
25
1
100
362.9788
32.6420 0.1061
-3.2359
-0.3435
0.1481 -2.7558
-0.4080
Pomadasys incisus
1
0.005
1
100
1.3057
0.0065
0.0004
-11.3548
-0.0043
0.0000 -15.0435
-0.0004
Raja montagui
2
0.15
1
100
2.6114
0.1959
0.0008
-10.3548
-0.0079
0.0009 -10.1366
-0.0090
Raja asterias
31
3.2
1
100
40.4761
4.1782
0.0118
-6.4006
-0.0758
0.0190 -5.7216
-0.1084
Scomber scombrus
1
0.1
1
100
1.3057
0.1306
0.0004
-11.3548
-0.0043
0.0006 -10.7216
-0.0063
Scorpaena notata
524
15.1
1
100
684.1758
19.7158 0.2001
-2.3214
-0.4645
0.0894 -3.4832
-0.3115
Sepia orbignyana
22
0.8
1
100
28.7249
1.0445
0.0084
-6.8954
-0.0579
0.0047 -7.7216
-0.0366
Serranus hepatus
7
0.15
1
100
9.1398
0.1959
0.0027
-8.5474
-0.0228
0.0009 -10.1366
-0.0090
Torpedo marmorata
1
1.7
1
100
1.3057
2.2197
0.0004
-11.3548
-0.0043
0.0101 -6.6341
-0.0668
Trachinus draco
21
0.47
1
100
27.4193
0.6137
0.0080
-6.9625
-0.0558
0.0028 -8.4889
-0.0236
Uranoscopus scaber
15
0.74
1
100
19.5852
0.9662
0.0057
-7.4479
-0.0427
0.0044 -7.8340
-0.0343
Zeus faber
1
0.1
1
100
1.3057
0.1306
0.0004
-11.3548
-0.0043
0.0006 -10.7216
-0.0063
Somme
2898
168.96
Ish
2.9777
Ish
2.75672
E
0.64121
E
0.59363