Relationships between fish brain weights and body weights for
Poecilia mexicana

Roland Bauchot, Monique Diagne, Roland Platel, Jean-Marc Ridet and Marie-Louise Bauchot
Université Paris 7 Laboratoire d'anatomie comparée

[n = 323]

Sort by : Body weight Brain weight SL TL Ref.

Relative brain weight graph (loading may take 2-3 min.)

Body weight
(W; g)
Brain weight
(B; mg)
Encephalization coefficients SL
(cm)
TL
(cm)
Ref
(B/W) (B/W^2/3)
0.1479
5.89
39.8
 
 1.98
 
0.1618
5.96
36.8
 
 2.19
 
0.1669
4.72
28.3
 
 2.24
 
0.1800
3.96
22.0
 
 2.2
 
0.1800
5.61
31.1
 
 1.9
 
0.1836
6.54
35.6
 
 2.16
 
0.1900
4.89
25.7
 
 2
 
0.1946
6.94
35.7
 
 2.25
 
0.2000
4.33
21.6
 
 2.1
 
0.2083
5.44
26.1
 
 2.27
 
0.2100
5.61
26.7
 
 2
 
0.2100
5.74
27.3
 
 1.8
 
0.2100
5.85
27.9
 
 2
 
0.2101
5.33
25.3
 
 2.2
 
0.2103
5.56
26.5
 
 2.452
 
0.2108
6.16
29.2
 
 2.16
 
0.2170
8.59
39.6
 
 2.22
 
0.2200
5.08
23.1
 
 2
 
0.2200
5.11
23.2
 
 2.4
 
0.2300
5.26
22.9
 
 1.9
 
0.2300
5.62
24.4
 
 2.1
 
0.2300
6.16
26.8
 
 2.1
 
0.2400
5.50
22.9
 
 2.4
 
0.2400
6.37
26.6
 
 2.1
 
0.2401
10.1
42.2
 
 2.6
 
0.2430
8.20
33.7
 
 2.919
 
0.2480
10.5
42.2
 
 2.38
 
0.2482
6.67
26.9
 
 2.6
 
0.2500
6.23
24.9
 
 2.1
 
0.2566
9.1
35.5
 
 2.4
 
0.2600
4.62
17.8
 
 2.1
 
0.2700
4.76
17.6
 
 2.4
 
0.2700
5.54
20.5
 
 2.2
 
0.2732
9.6
35.0
 
 2.4
 
0.2745
13.6
49.5
 
 2.5
 
0.2792
10.0
35.7
 
 2.45
 
0.2800
6.29
22.5
 
 2.2
 
0.2800
7.09
25.3
 
 2.1
 
0.2817
7.55
26.8
 
 2.5
 
0.2840
9.6
33.7
 
 2.42
 
0.2846
9.6
33.7
 
 2.6
 
0.2876
11.8
41.0
 
 2.64
 
0.2891
9.7
33.6
 
 2.5
 
0.2900
6.84
23.6
 
 2.2
 
0.3000
4.0400
13.5
 
 2.3
 
0.3000
7.02
23.4
 
 2.3
 
0.3000
7.02
23.4
 
 2.2
 
0.3000
7.31
24.4
 
 2.7
 
0.3015
9.4
31.0
 
 2.191
 
0.3100
4.51
14.5
 
 2.3
 
0.3100
5.80
18.7
 
 2.5
 
0.3200
8.66
27.1
 
 2.3
 
0.3200
8.75
27.3
 
 2.2
 
0.3217
8.88
27.6
 
 2.873
 
0.3277
8.44
25.7
 
 2.5
 
0.3301
10.6
32.0
 
 2.5
 
0.3400
5.01
14.7
 
 2.3
 
0.3400
5.06
14.9
 
 2.3
 
0.3420
11.1
32.6
 
 2.74
 
0.3469
13.1
37.6
 
 2.7
 
0.3485
12.7
36.6
 
 2.72
 
0.3499
11.5
32.9
 
 2.838
 
0.3500
6.98
19.9
 
 2.6
 
0.3500
8.64
24.7
 
 2.8
 
0.3500
9.0
25.8
 
 2.8
 
0.3508
14.1
40.2
 
 2.8
 
0.3591
13.9
38.7
 
 2.9
 
0.3600
6.39
17.7
 
 2.5
 
0.3600
7.42
20.6
 
 1.9
 
0.3600
9.0
25.0
 
 2.3
 
0.3664
13.7
37.4
 
 2.9
 
0.3665
12.3
33.5
 
 3.05
 
0.3688
6.95
18.8
 
 2.52
 
0.3700
7.13
19.3
 
 2.6
 
0.3700
7.88
21.3
 
 2.7
 
0.3700
8.29
22.4
 
 2.6
 
0.3760
12.9
34.2
 
 2.9
 
0.3800
5.08
13.4
 
 2.3
 
0.3800
7.79
20.5
 
 2.4
 
0.3800
8.45
22.2
 
 2.6
 
0.3800
8.89
23.4
 
 2.8
 
0.3825
9.3
24.4
 
 2.62
 
0.3850
6.78
17.6
 
 2.8
 
0.3876
10.0
25.8
 
 2.83
 
0.3900
7.24
18.6
 
 2.5
 
0.3925
19.0
48.4
 
 2.81
 
0.3944
10.9
27.6
 
 2.8
 
0.3985
11.0
27.5
 
 2.71
 
0.4000
5.53
13.8
 
 2.6
 
0.4064
11.4
28.1
 
 2.8
 
0.4078
6.76
16.6
 
 2.8
 
0.4100
7.00
17.1
 
 2.6
 
0.4100
7.98
19.5
 
 2.8
 
0.4124
12.8
31.1
 
 2.8
 
0.4129
12.2
29.5
 
 3
 
0.4152
13.5
32.6
 
 2.75
 
0.4183
12.9
30.8
 
 2.6
 
0.4200
7.04
16.8
 
 2.6
 
0.4223
11.2
26.4
 
 2.856
 
0.4300
6.29
14.6
 
 2.3
 
0.4300
7.42
17.3
 
 2.4
 
0.4300
7.71
17.9
 
 2.4
 
0.4300
8.62
20.1
 
 2.7
 
0.4400
7.24
16.5
 
 2.8
 
0.4400
7.74
17.6
 
 2.6
 
0.4476
9.3
20.7
 
 2.945
 
0.4500
6.71
14.9
 
 2.6
 
0.4500
8.24
18.3
 
 2.7
 
0.4500
8.26
18.3
 
 2.7
 
0.4500
8.69
19.3
 
 2.4
 
0.4500
9.9
22.0
 
 2.7
 
0.4501
13.0
29.0
 
 3
 
0.4561
13.2
29.0
 
 2.7
 
0.4646
10.0
21.4
 
 2.72
 
0.4726
8.17
17.3
 
 2.72
 
0.4734
11.4
24.2
 
 2.83
 
0.4800
9.0
18.8
 
 3
 
0.4833
10.9
22.6
 
 2.98
 
0.4849
12.6
25.9
 
 2.85
 
0.4858
13.4
27.7
 
 3.1
 
0.4876
11.7
24.1
 
 3.04
 
0.4900
5.98
12.2
 
 3
 
0.4900
6.29
12.8
 
 2.8
 
0.4960
14.0800
28.4
 
 3
 
0.5000
7.95
15.9
 
 2.7
 
0.5019
13.0
25.9
 
 3.07
 
0.5042
11.6
22.9
 
 3.2
 
0.5100
6.70
13.1
 
 2.7
 
0.5100
10.0
19.5
 
 2.9
 
0.5152
11.5
22.3
 
 2.92
 
0.5280
14.9
28.2
 
 3.3
 
0.5312
11.4
21.5
 
 3.04
 
0.5400
5.77
10.7
 
 2.8
 
0.5500
9.6
17.5
 
 2.9
 
0.5500
10.8
19.7
 
 2.6
 
0.5592
11.9
21.2
 
 3.19
 
0.5593
15.2
27.1
 
 3.11
 
0.5600
9.6
17.2
 
 3.1
 
0.5700
12.0
21.0
 
 2.2
 
0.5747
15.8
27.6
 
 3.2
 
0.5782
10.0
17.4
 
 2.995
 
0.5806
17.5
30.2
 
 3.08
 
0.5809
10.7
18.5
 
 3.1
 
0.5811
8.03
13.8
 
 3.15
 
0.5880
11.1
19.0
 
 3.05
 
0.5900
9.4
15.9
 
 2.9
 
0.5900
9.4
16.0
 
 3
 
0.5900
9.6
16.2
 
 2.9
 
0.5900
9.6
16.3
 
 3
 
0.5933
8.82
14.9
 
 3.025
 
0.6100
7.67
12.6
 
 2.9
 
0.6144
15.3
24.9
 
 3
 
0.6200
8.24
13.3
 
 3
 
0.6300
9.6
15.2
 
 
 
0.6338
10.5
16.6
 
 2.995
 
0.6400
9.4
14.7
 
 3.1
 
0.6400
12.9
20.1
 
 2.9
 
0.6400
12.9
20.1
 
 2.9
 
0.6410
9.6
15.0
 
 3.3
 
0.6500
7.96
12.3
 
 3.1
 
0.6500
9.3
14.3
 
 3.1
 
0.6512
10.8
16.6
 
 3.29
 
0.6651
12.7
19.1
 
 3.4
 
0.6687
12.2
18.2
 
 3.2
 
0.6744
11.1
16.4
 
 3.15
 
0.6800
8.82
13.0
 
 2.9
 
0.6800
12.3
18.1
 
 3.2
 
0.6802
11.2
16.5
 
 3.4
 
0.6870
9.4
13.7
 
 3.44
 
0.6900
8.16
11.8
 
 3.2
 
0.6900
8.72
12.6
 
 3.2
 
0.6928
14.6
21.1
 
 3.35
 
0.7000
6.83
9.8
 
 3.1
 
0.7061
20.4
28.9
 
 3.4
 
0.7087
16.1
22.8
 
 3.2
 
0.7100
6.04
8.51
 
 3.3
 
0.7124
9.0
12.7
 
 3.215
 
0.7129
14.7
20.6
 
 3.29
 
0.7130
12.6
17.7
 
 3.16
 
0.7225
16.1
22.3
 
 3.4
 
0.7260
13.5
18.6
 
 3.59
 
0.7315
14.5
19.8
 
 3.3
 
0.7357
15.5
21.1
 
 3.1
 
0.7500
9.3
12.4
 
 3.5
 
0.7591
15.0
19.7
 
 3.46
 
0.7594
12.6
16.6
 
 3.305
 
0.7646
13.1
17.1
 
 3.5
 
0.7911
13.4
16.9
 
 3.21
 
0.7914
12.0
15.2
 
 3.16
 
0.7945
15.8
19.9
 
 3.3
 
0.8005
14.0
17.5
 
 3.535
 
0.8100
9.0
11.1
 
 3.4
 
0.8200
9.1
11.0
 
 3.4
 
0.8203
12.6
15.3
 
 3.08
 
0.8270
9.6
11.6
 
 3.5
 
0.8300
8.67
10.4
 
 3.8
 
0.8322
15.2
18.3
 
 3.4
 
0.8389
9.9
11.8
 
 3.47
 
0.8400
9.1
10.8
 
 3.8
 
0.8432
10.7
12.7
 
 3.44
 
0.8476
15.0
17.6
 
 3.7
 
0.8600
9.0100
10.5
 
 3.4
 
0.8600
11.4
13.3
 
 3.3
 
0.8695
19.3
22.1
 
 3.5
 
0.8733
12.6
14.4
 
 3.41
 
0.8900
7.98
8.96
 
 3.4
 
0.9178
13.3
14.5
 
 3.63
 
0.9200
11.1
12.0
 
 3.6
 
0.9273
10.6
11.5
 
 3.56
 
0.9288
12.7
13.7
 
 3.6
 
0.9303
15.8
17.0
 
 4.17
 
0.9371
10.3
11.0
 
 3.46
 
0.9372
10.6
11.3
 
 2.765
 
0.9429
18.7
19.8
 
 3.7
 
0.9458
9.5
10.0
 
 3.55
 
0.9500
13.0
13.6
 
 3.5
 
0.9545
12.6
13.2
 
 3.55
 
0.9590
21.2
22.1
 
 3.5
 
0.9700
11.0
11.3
 
 3.5
 
0.9860
16.1
16.3
 
 3.47
 
0.9921
16.8
16.9
 
 3.6
 
1.01
18.2
18.1
 
 3.6
 
1.01
14.4
14.3
 
 3.525
 
1.02
12.0
11.7
 
 3.73
 
1.03
16.1
15.7
 
 3.84
 
1.03
14.6
14.2
 
 3.7
 
1.03
13.9
13.5
 
 3.385
 
1.0300
12.5
12.1
 
 3.8
 
1.0400
11.0
10.6
 
 3.5
 
1.0400
18.1
17.4
 
 3.4
 
1.05
12.3
11.6
 
 3.59
 
1.06
19.9
18.9
 
 3.8
 
1.06
12.8
12.2
 
 3.495
 
1.0600
9.5
8.98
 
 3.4
 
1.0600
11.3
10.6
 
 3.5
 
1.06
16.3
15.3
 
 3.76
 
1.06
16.3
15.3
 
 3.76
 
1.06
15.2
14.2
 
 3.5
 
1.07
19.1
17.8
 
 3.75
 
1.09
17.9
16.4
 
 3.84
 
1.11
11.7
10.5
 
 4.1
 
1.11
10.0500
9.1
 
 3.7
 
1.11
18.8
16.9
 
 3.5
 
1.11
18.9
17.0
 
 3.7
 
1.13
10.9
9.6
 
 3.8
 
1.14
17.0
15.0
 
 3.84
 
1.14
16.8
14.7
 
 3.96
 
1.18
15.8
13.4
 
 3.5
 
1.18
17.7
14.9
 
 4
 
1.20
15.5
13.0
 
 3.87
 
1.21
13.7
11.4
 
 4.235
 
1.21
15.3
12.7
 
 3.9
 
1.21
19.0
15.6
 
 3.92
 
1.22
12.3
10.1
 
 3.9
 
1.22
13.4
11.0
 
 3.7
 
1.23
15.0
12.2
 
 3.53
 
1.24
15.6
12.6
 
 3.7
 
1.24
15.1
12.2
 
 3.92
 
1.25
11.9
9.5
 
 3.74
 
1.26
14.5
11.5
 
 3.5
 
1.26
19.2
15.2
 
 4.3
 
1.27
19.5
15.4
 
 3.7
 
1.27
16.9
13.3
 
 3.55
 
1.29
17.5
13.6
 
 4.29
 
1.29
15.4
11.9
 
 3.71
 
1.29
11.7
9.1
 
 4
 
1.30
14.9
11.5
 
 3.6
 
1.30
19.5
15.0
 
 3.9
 
1.32
19.4
14.8
 
 3.92
 
1.32
18.7
14.1
 
 4.045
 
1.32
19.4
14.6
 
 4.5
 
1.33
17.5
13.1
 
 4.1
 
1.35
23.8
17.6
 
 4.2
 
1.37
12.9
9.4
 
 4
 
1.37
18.3
13.4
 
 3.65
 
1.38
18.5
13.4
 
 4.3
 
1.38
20.4
14.8
 
 4
 
1.39
19.2
13.8
 
 4.1
 
1.41
17.7
12.5
 
 4.01
 
1.42
16.9
11.9
 
 4.34
 
1.45
14.1
9.7
 
 4.12
 
1.45
19.0
13.0
 
 4.585
 
1.46
26.5
18.2
 
 4.1
 
1.46
17.8
12.2
 
 3.87
 
1.47
20.0
13.6
 
 4.14
 
1.49
13.8
9.3
 
 4.2
 
1.51
20.9
13.8
 
 4.32
 
1.51
20.9
13.8
 
 4.32
 
1.55
16.1
10.4
 
 4.14
 
1.55
16.1
10.4
 
 4.14
 
1.55
10.9
7.04
 
 3.1
 
1.57
16.7
10.6
 
 3.9
 
1.57
19.0
12.1
 
 3.9
 
1.58
18.9
12.0
 
 4
 
1.61
15.6
9.7
 
 4.24
 
1.62
15.2
9.4
 
 4
 
1.63
16.2
10.0
 
 4.255
 
1.63
16.2
10.0
 
 4.255
 
1.64
17.7
10.8
 
 4.48
 
1.65
23.1
14.0
 
 4.1
 
1.75
15.5
8.84
 
 4.25
 
1.79
19.9
11.1
 
 4.22
 
1.81
2.69
1.49
 
 4.6
 
1.81
27.9
15.4
 
 4.2
 
1.84
24.1
13.1
 
 4.3
 
1.85
21.3
11.5
 
 4.1
 
1.86
19.5
10.5
 
 4.17
 
1.87
21.1
11.3
 
 4.29
 
1.88
20.4
10.9
 
 4.745
 
1.91
18.5
9.6
 
 4.56
 
1.95
21.3
10.9
 
 4.2
 
2.0800
22.0
10.6
 
 4.3
 
2.11
22.7
10.7
 
 4.5
 
2.13
19.6
9.2
 
 4.4
 
2.16
24.3
11.2
 
 4.63
 
2.41
21.1
8.77
 
 5.1
 
2.42
23.8
9.8
 
 4.5
 
2.85
21.5
7.53
 
 4.88
 
2.97
3.21
1.08
 
 5.1
 
3.0600
26.5
8.67
 
 5.1
 
3.30
18.8
5.70
 
 4.8
 
3.38
29.5
8.74
 
 4.9
 
14.4
13.0
0.9070
 
 3.8
 

Comments & Corrections
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