Table 4 Lapilli 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 = OP2/OS), rectangularity (Re = OS/[OL × OW]), ellipticity (E = OL–OW/OL + OW), aspect ratio (AR = OW/OL%), form factor (FF = 4πOS/OP2) and roundness (Ro = 4OS/πOL2)
| Â | R | L | ||||
|---|---|---|---|---|---|---|
Mean | s.d | Min.—Max | Mean | s.d | Min.—Max | |
OL | 0.53 | 0.06 | 0.37—0.62 | 0.52 | 0.04 | 0.43—0.6 |
OW | 0.38 | 0.06 | 0.31—0.51 | 0.35 | 0.05 | 0.31—0.47 |
OP | 1.61 | 0.2 | 1.29—1.95 | 1.56 | 0.15 | 1.3—1.84 |
OS | 0.14 | 0.03 | 0.1—0.2 | 0.13 | 0.02 | 0.09—0.18 |
OL/TL % | 0.2 | 0.04 | 0.13—0.24 | 0.2 | 0.04 | 0.14—0.26 |
C | 18.32 | 0.65 | 17.28—19.63 | 18.7 | 0.69 | 17.77—20.11 |
Re | 0.7 | 0.02 | 0.67—0.74 | 0.7 | 0.01 | 0.68—0.72 |
E | 0.16 | 0.07 | 0.02—0.24 | 0.19 | 0.05 | 0.08—0.26 |
AR | 0.73 | 0.11 | 0.61—0.95 | 0.68 | 0.07 | 0.58—0.86 |
FF | 0.69 | 0.02 | 0.64—0.73 | 0.67 | 0.02 | 0.62—0.71 |
Ro | 0.65 | 0.1 | 0.54—0.9 | 0.61 | 0.06 | 0.52—0.76 |