Campfield and Houde: Ichthyoplankton community structure and comparative trophodynamics 
19 
Appendix Table 2 
Year 2001. 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 2001. The 
salt-front region includes stations ±3 rkm from the salt-front location (see Fig. 1). H'= Shannon-Wiener diversity index values 
(ff' max =2.Q). 
Species 
Freshwater 
Salt front 
Oligohaline 
Freq 
no. /tow 
SE 
Freq 
no. /tow 
SE 
Freq 
no. /tow 
SE 
Anchoa mitchilli (bay anchovy) 
— 
— 
— 
0.14 
0.34 
0.22 
0.13 
1.31 
0.97 
Alosa aestivalis (blueback herring) 
0.16 
0.85 
0.19 
— 
— 
— 
— 
— 
— 
Alosa mediocris (hickory shad) 
0.03 
0.03 
0.02 
— 
— 
— 
— 
— 
— 
Alosa sapidissima (American shad) 
0.11 
0.13 
0.05 
— 
— 
— 
— 
— 
— 
Alosa pseudoharengus (alewife) 
0.81 
25.10 
9.13 
0.34 
0.76 
0.30 
— 
— 
— 
Dorosoma eepedianum (gizzard shad) 
0.36 
2.99 
1.31 
0.38 
2.10 
0.83 
0.05 
0.18 
0.16 
Notropis hudsonius (spottail shiner) 
0.15 
0.62 
0.34 
0.03 
0.03 
0.03 
— 
— 
— 
Etheostoma spp. (darters) 
0.28 
0.96 
0.23 
0.10 
0.10 
0.06 
— 
— 
— 
Fundulus heteroclitus (mummichog) 
0.18 
0.20 
0.05 
— 
— 
— 
— 
— 
— 
Erimyzon spp. (suckers) 
0.42 
4.11 
1.28 
0.10 
0.14 
0.08 
0.03 
0.03 
0.03 
Menidia beryllina (inland silverside) 
0.14 
0.39 
0.23 
0.31 
0.45 
0.14 
0.31 
1.49 
0.54 
Menidia menidia (Atlantic silverside) 
0.11 
0.13 
0.04 
0.28 
1.17 
0.61 
0.59 
4.87 
1.41 
Membras martinica (rough silverside) 
— 
— 
— 
0.07 
0.07 
0.05 
— 
— 
— 
Syngnathus fuscus (Northern silverside) 
— 
— 
— 
— 
— 
— 
0.05 
0.05 
0.04 
Opsanus tau (oyster toadfish) 
— 
— 
— 
— 
— 
— 
0.05 
0.05 
0.04 
Perea flavescens (yellow perch) 
0.07 
0.92 
0.59 
0.07 
0.07 
0.05 
— 
— 
— 
Morons americana (white perch) 
0.83 
429.34 
128.28 
1.00 
194.07 
39.55 
0.49 
8.05 
2.49 
Morons saxatilis (striped bass) 
0.40 
72.72 
37.88 
0.66 
45.17 
22.62 
0.54 
4.44 
1.93 
Micropterus salmoides (largemouth bass) 
0.01 
0.01 
0.01 
— 
— 
— 
— 
— 
— 
Pomoxis annularis (white crappie) 
0.17 
0.27 
0.09 
0.03 
0.03 
0.03 
— 
— 
— 
Sciaenidae spp. (drums) 
0.01 
0.03 
0.03 
— 
— 
— 
— 
— 
— 
Gobiosoma base (naked goby) 
0.01 
0.01 
0.01 
0.72 
597.62 
405.02 
0.92 
169.10 
65.64 
Trinectes maculatus (hogchoker) 
0.01 
0.01 
0.01 
— 
— 
— 
0.03 
0.03 
0.03 
Total 
538.8 
842.1 
189.6 
CV (%) 
223 
254 
217 
Number of species 
19 
14 
11 
H' 
0.72 
0.78 
0.50 
