10 
Fred C. Rohde and Steve W. Ross 
Table 2. Monthly mean scale marginal increments (MI), standard deviation 
(SD), and ranges for Etheostoma mariae from Naked Creek, North 
Carolina. Fish with 2 and 3 marks were combined because of the 
small sample size. 
Month 
Fish with 1 mark 
Fish with 2 and 3 marks 
Mean MI (SD) 
Range 
Mean MI (SD) 
Range 
Jan 
8.33 (4.3) 
8-15 
3.75 (1.3) 
2-5 
Feb 
11.00 (5.4) 
5-21 
1.00 
1 
Mar 
1.40 (1.5) 
0-4 
Apr 
2.25 (2.4) 
0-9 
5.57 (3.1) 
1-14 
May 
10.50 (6.5) 
4-20 
3.33 (1.2) 
2-5 
Jun 
4.50 (2.1) 
1-7 
6.00 (3.0) 
3-9 
Jul 
10.40 (4.7) 
2-20 
3.00 
3 
Aug 
10.60 (5.0) 
3-19 
Sep 
7.46 (3.9) 
3-16 
6.00 
6 
Oct 
10.13 (4.9) 
4-21 
7.25 (3.3) 
4-11 
Nov 
Dec 
9.00 (1.0) 
8-10 
9.50 (1.5) 
8-11 
Table 3. 
Average back-calculated and observed standard lengths and length 
increments for male (M) and female (F) Etheostoma mariae from 
Naked Creek, North Carolina. 
Age 
Average 
Mean back-calculated 
Class 
N 
observed SL 
SL at 
: age 
1 
2 
M 
F 
M F 
M F 
M 
F 
0 
60 
114 
29.6 28.5 
1 
33 
61 
43.1 37.0 
33.5 30.3 
2 
6 
29 
51.2 43.5 
31.8 27.2 
45.5 
38.4 
Total N 
99 
204 
39 90 
6 
29 
Mean weighted back-calculated SL 
33.2 29.3 
45.5 
38.4 
Mean annual calculated growth increments 
33.2 29.3 
13.7 
11.2 
