|
Species
|
Sampling site
|
Sampling date
|
Increment width in μm (n)
|
|---|
|
R
m
|
R
t
|
R
t−m
|
|---|
|
A. japonica
a
|
Tungkang River, Taiwan
|
30 December 92
|
0.8 ± 0.07 (5)
|
0.9 ± 0.09 (5)
|
1.2 ± 0.31 (5)
|
|
24 March 93
|
0.8 ± 0.07 (7)
|
0.8 ± 0.03 (5)
|
1.4 ± 0.19 (5)
|
|
Shuangshi River, Taiwan
|
20 December 92
|
0.8 ± 0.07 (7)
|
0.9 ± 0.03 (6)
|
1.5 ± 0.48 (6)
|
|
17 February 93
|
0.9 ± 0.09 (3)
|
1.0 ± 0.04 (2)
|
1.4 ± 0.03 (2)
|
|
Mingchiang River, China
|
1 March 93
|
0.7 ± 0.02 (5)
|
0.9 ± 0.06 (5)
|
1.4 ± 0.38 (5)
|
|
Chyantarng River, China
|
17 February 93
|
0.7 ± 0.08 (7)
|
0.8 ± 0.03 (4)
|
1.3 ± 0.17 (4)
|
|
Yalu River, China
|
3 May 93
|
0.8 ± 0.09 (8)
|
0.9 ± 0.05 (8)
|
1.3 ± 0.45 (8)
|
|
Ichinomiya River, Japan
|
10 January 94
|
0.7 ± 0.06 (5)
|
0.8 ± 0.05 (5)
|
1.2 ± 0.26 (5)
|
|
Overall (μ1)
| | |
0.78 ± 0.07 (47)
|
0.88 ± 0.05 (40)
|
1.34 ± 0.28 (40)
|
|
A. marmorata
|
Cagayan River, the Philippines
|
19 May 08
|
1.0 ± 0.18 (13)
|
1.1 ± 0.14 (13)
|
1.84 ± 0.46 (13)
|
|
Hsiukuluan River, Taiwan
|
20 May 08
|
0.9 ± 0.10 (13)
|
1.2 ± 0.18 (13)
|
2.29 ± 0.72 (13)
|
|
Kurio River, Japan
|
6 June 96
|
0.9 ± 0.14 (15)
|
1.1 ± 0.17 (15)
|
2.18 ± 0.61 (15)
|
|
Overall (μ2)
| | |
0.93 ± 0.14 (41)
|
1.13 ± 0.16 (41)
|
2.10 ± 0.60 (41)
|
|
Difference (μ2−μ1)
| | |
0.15
|
0.25
|
0.76
|
|
Significance
| | |
A. marmorata > A. japonica
|
A. marmorata > A. japonica
|
A. marmorata > A. japonica
|
-
aCheng and Tzeng (1996). Mean increment widths (±SD) of radii of R
m, R
t, and R
t−m in otoliths of A. japonica and A. marmorata glass eels. n, number of individuals used for increment width measurements.
