International Journal of Marine Science 2017, Vol.7, No.40, 386-393
388
head length and otolith width were calculated with the Excel programme using power equation with best fit trend
line and R
2
.
2 Results
The average total length was 173.0 mm (154~198 mm), standard length 151 (131~168 mm) and head length 55
mm (42~65 mm). The otolith length OL ranged from 59 to 70 mm and otolith width OW from 34 to 39 mm. As no
significant differences (
t
-test for paired comparisons,
p
<0.05) were found between left and right otolith length and
width data, only the left sagittae measurements were used for determining the relationship between fish size and
otolith size.
Values of
a
and
b
of the otolith length and width-fish total, standard and head length relationships and the
associated statistical information are provided in Table 1. The highest value of
b
was observed for the otolith
width OL-Fish total length TL (0.8630) and lowest value is observed for otolith length OL-Fish head length HL
(0.2461).
All the relationships studied have shown a negative allometry. The values of correlations obtained from the six
relationships were higher than 0.8. The highest correlation values (0.9723 and 0.9712) were observed in the
relationships, otolith length OL-fish head length and otolith length OW-fish total length TL respectively. The
lowest correlation value (0.8627) was observed in the relationship, otolith length OL-fish standard length SL
(Table 1). Both otolith length and width gave the best estimations for both fish total length and head lengths
(Figure 2; Figure 3; Figure 4; Figure 5; Figure 6; Figure 7).
Table 1 Otolith major axis length (Otolith length, OL) and minor axis length (otolith width, OW)-fish morphometrics (head length,
HL, standard length, SL, total length, TL) relationships
Statistical relationship
N
a
b
R
2
SE
Allometry
Otolith length OL-Fish head length HL
40
1.1768
0.5863
0.9197
0.302
Negative allometry
Otolith length OW-Fish head length HL
40
0.3029
0.863
0.9712
0.025
Ditto
Otolith length OL-Fish standard length SL
40
1.8555
0.4485
0.8627
0.210
Ditto
Otolith length OW-Fish standard length SL 40
1.1099
0.433
0.8849
0.213
Ditto
Otolith length OL-Fish total length TL
40
4.3088
0.2461
0.9723
0.123
Ditto
Otolith length OW-Fish total length TL
40
2.377
0.2602
0.9563
0.027
Ditto
Figure 2 The relationship between otolith length and fish total length
