18 
Fishery Bulletin 109(1 ) 
Appendix Table 1 
Year 2000. Larval fishes: species composition, frequency of occurrence (Freq=proportion of tows positive), no. /tow, and standard 
error (SE) of no. /tow by region in the Patuxent River estuarine transition zone from spring through early summer 2000. The 
salt front region includes stations ±3 rkm from the salt-front location (see Fig. 1). H'= Shannon-Wiener diversity index values 
W' max =2.0). 
Species 
Freshwater 
Salt front 
Oligohaline 
Freq 
no. /tow 
SE 
Freq 
no. /tow 
SE 
Freq 
no. /tow 
SE 
Anguilla rostrata (American eel) 
0.01 
0.01 
0.01 






Anchoa mitchilli (bay anchovy) 
0.01 
0.01 
0.01 
0.19 
0.31 
0.15 
0.35 
0.73 
0.26 
Alosa aestivalis (blueback herring) 
0.14 
0.52 
0.20 
— 
— 
— 
— 
— 
— 
Alosa mediocris (hickory shad) 
0.07 
0.09 
0.04 
0.03 
0.03 
0.03 
— 
— 
— 
Alosa sapidissirna (American shad) 
0.10 
0.13 
0.05 
0.03 
0.03 
0.03 
— 
— 
— 
Alosa pseudoharengus (alewife) 
0.73 
28.84 
10.46 
0.13 
0.13 
0.06 
— 
— 
— 
Dot'osoma cepedianurn (gizzard shad) 
0.59 
14.39 
4.82 
0.34 
1.25 
0.50 
0.12 
0.27 
0.16 
Notropis hudsonius (spottail shiner) 
0.04 
0.06 
0.03 
— 
- 
— 
— 
— 
— 
Etheostoma spp. (darters) 
0.10 
0.11 
0.04 
— 
— 
— 
— 
— 
— 
Fundulus heteroclitus (mummichog) 
0.07 
0.08 
0.04 
— 
— 
— 
— 
— 
— 
Fundulus majalis (striped killifish) 
0.01 
0.01 
0.01 
— 
— 
— 
— 
— 
— 
Erimyzon spp. (chubsuckers) 
0.06 
0.06 
0.03 
0.03 
0.03 
0.03 
— 
— 
— 
Ictalurus punctatus (channel catfish) 
0.01 
0.01 
0.01 
0.03 
0.03 
0.03 
— 
— 
— 
Menidia beryllina (inland silverside) 
0.13 
0.17 
0.06 
0.03 
0.03 
0.03 
0.12 
0.12 
0.06 
Menidia menidia (Atlantic silverside) 
— 
— 
— 
0.16 
0.19 
0.08 
0.31 
1.23 
0.77 
Syngnathus fuscus (Northern pipefish) 
— 
— 
— 
— 
— 
— 
0.04 
0.04 
0.04 
Lepomis gibbosus (pumpkinseed) 
0.01 
0.01 
0.01 
— 
— 
— 
— 
— 
— 
Perea flavescens (yellow perch) 
0.03 
0.06 
0.04 
— 
— 
— 
— 
— 
— 
Morone americana (white perch) 
0.80 
160.59 
74.80 
0.97 
167.11 
64.09 
0.73 
27.27 
8.05 
Morone saxatilis (striped bass) 
0.31 
5.61 
2.28 
0.53 
11.14 
4.12 
0.38 
3.21 
1.46 
Pomoxis annularis (white crappie) 
0.24 
0.45 
0.13 
0.06 
0.09 
0.07 
— 
— 
— 
Sciaenidae spp. (drums) 
— 
— 
— 
0.03 
0.16 
0.16 
0.08 
0.27 
0.23 
Gobiosoma bosc (naked goby) 
0.14 
1.00 
0.46 
0.81 
98.30 
42.99 
0.92 
591.90 
227.69 
Trinectes maculatus (hogchoker) 
0.01 
0.01 
0.01 
0.06 
0.06 
0.04 
0.04 
0.04 
0.04 
Total 
212.2 
278.9 
625.1 
CV (%) 
315 
154 
185 
Number of species 
21 
15 
10 
H‘ 
0.85 
0.86 
0.25 
