Table 1 Sagittae morphometric mean values, with standard deviation (s.d.), maximum (Max.), and minimum (Min.) values, for each investigated size class: maximum otolith length (OL, mm) and otolith width (OW, mm), otolith perimeter (OP, mm), otolith surface (OS, mm²), otolith length to the total fish length ratio (OL/TL), circularity (C), rectangularity (Re), ellipticity (E), aspect ratio (AR), form factor (FF) and roundness (Ro)

OL

2.16

0.23

1.7—2.67

2.36

0.21

2.02—2.88

2.64

0.27

2.05—3.33

OW

1.29

0.13

1.01—1.55

1.37

0.1

1.64—1.15

1.54

0.11

1.31—1.79

OP

6.46

0.71

4.93—7.88

7

0.57

5.85—8.25

7.8

0.74

6.3—9.34

OS

2.08

0.41

1.29—2.97

2.34

0.35

1.75—3.28

2.97

0.45

2.12—4.1

OL/TL %

0.95

0.1

0.79—1.21

0.9

0.08

0.71—1.09

0.82

0.11

0.67—1.11

C

20.28

1.5

17.65—24.75

21.02

1.26

18.86—23.7

20.6

1.28

18.58—23.37

Re

0.74

0.02

0.7—0.79

0.72

0.02

0.67—0.79

0.73

0.02

0.69—0.77

E

0.25

0.03

0.19—0.33

0.26

0.03

0.19—0.32

0.26

0.03

0.2—0.32

AR

0.6

0.04

0.5—0.69

0.58

0.03

0.51—0.68

0.58

0.04

0.52—0.66

FF

0.62

0.04

0.51—0.71

0.6

0.03

0.53—0.66

0.61

0.04

0.54—0.67

Ro

0.56

0.05

0.47—0.68

0.54

0.04

0.47—0.64

0.54

0.04

0.47—0.64