| |
Dongola
|
Merowe
|
|---|
|
Habitats sampled
|
OR*
|
95% CI
|
P value†
|
Habitats sampled
|
OR
|
95% CI
|
P value†
|
|---|
|
Water temperature (°C)
| | | |
0.26
| | | |
0.87
|
|
<24
|
366
|
1.00
| | |
533
|
1.00
| | |
|
24–27.9
|
281
|
1.01
|
0.63–1.63
|
0.95
|
400
|
1.10
|
0.68–1.79
|
0.70
|
|
28–31.9
|
376
|
0.76
|
0.47–1.20
|
0.24
|
569
|
1.11
|
0.71–1.74
|
0.63
|
|
32+
|
258
|
1.23
|
0.77–1.96
|
0.38
|
565
|
1.23
|
0.79–1.90
|
0.35
|
|
Salinity (%)
| | | |
<0.0001
| | | |
<0.0001
|
|
0
|
318
|
1.00
| | |
890
|
1.00
| | |
|
0.01–0.25
|
689
|
5.02
|
2.66–9.48
|
<0.0001
|
807
|
2.88
|
1.95–4.26
|
<0.0001
|
|
>0.25
|
274
|
4.49
|
2.25–8.98
|
<0.0001
|
370
|
2.49
|
1.56–3.99
|
<0.0001
|
|
pH
| | | |
<0.0001
| | | |
0.0005
|
|
< 6.5
|
253
|
1.00
| | |
424
|
1.00
| | |
|
6.5
|
756
|
1.00
|
0.62–1.63
|
0.99
|
1,358
|
1.05
|
0.68–1.61
|
0.83
|
|
> 6.5
|
272
|
2.59
|
1.55–4.31
|
<0.0001
|
285
|
2.29
|
1.39–3.78
|
0.001
|
|
Water turbidity
| | | |
0.54
| | | |
0.0002
|
|
Non-turbid
|
871
|
1.00
| | |
1,141
|
1.00
| | |
|
Turbid
|
410
|
0.89
|
0.62–1.29
| |
926
|
0.53
|
0.38–0.75
| |
|
Water depth (cm)
| | | |
0.20
| | | |
<0.0001
|
|
<10
|
844
|
1.00
| | |
1,148
|
1.00
| | |
|
10–50
|
325
|
0.94
|
0.64–1.39
|
0.76
|
418
|
1.39
|
0.97–1.99
|
0.07
|
|
>50
|
112
|
0.53
|
0.25–1.12
|
0.10
|
501
|
0.32
|
0.18–0.55
|
<0.0001
|
|
Surface area (m
2
)
| | | |
0.0001
| | | |
<0.0001
|
|
<1
|
552
|
1.00
| | |
947
|
1.00
| | |
|
1–10
|
438
|
1.97
|
1.36–2.86
|
<0.0001
|
619
|
3.86
|
2.62–5.68
|
<0.0001
|
|
>10
|
291
|
0.79
|
0.48–1.32
|
0.37
|
501
|
1.81
|
1.14–2.87
|
0.01
|
|
Degree of shading (%)
| | | |
0.0008
| | | |
<0.0001
|
|
<25
|
888
|
1.00
| | |
1,290
|
1.00
| | |
|
25–75
|
285
|
0.56
|
0.35–0.89
|
0.01
|
546
|
0.67
|
0.45–0.97
|
0.04
|
|
>75
|
108
|
0.29
|
0.12–0.73
|
0.01
|
231
|
0.12
|
0.04–0.38
|
<0.0001
|
|
Presence of algae
| | | |
<0.0001
| | | |
<0.0001
|
|
No
|
1,027
|
1.00
| | |
1,701
|
1.00
| | |
|
Yes
|
254
|
3.62
|
2.54–5.17
| |
366
|
5.81
|
4.18–8.07
| |
|
Presence of vegetation
| | | |
<0.0001
| | | |
<0.0001
|
|
No
|
598
|
1.00
| | |
1,042
|
1.00
| | |
|
Yes
|
683
|
2.18
|
1.52–3.13
| |
1,025
|
2.27
|
1.62–3.17
| |
- * Odds ratio
- † P values in bold are from likelihood ratio tests (overall significance of exposure variables); for variables with multiple exposure levels P values from Wald tests are also reported.
