Table 1 The diversity indices (S and H’) of fish assemblages recorded in different salinity zones during the high-flow and low-flow season in the Orange River Estuary during 2004–2018.

From: Assessing the application of the revised Remane Model to fish species in a fluvially dominated cool-temperate southern African coastal system

 

No. of species (S)

Shannon–Wiener diversity (H')

Salinity zone (Range)

Fresh (0–0.49)

24

1.05

Oligohaline (0.5–4.9)

23

0.41

Mesohaline (5.0–17.9)

14

0.13

Polyhaline (18.0–29.9)

10

0.05

Euhaline (30.0–35.9)

10

0.14

Season

High-flow (n = 80)

28

0.60

Low-flow (n = 121)

27

0.27

Entire study area

30

3.56

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