Freshwater mussel records collected by the Maryland Department of ...

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Table 4. Frequency of occurrence for fishes collected at sites throughout the range of E. fisheriana (EF) in Maryland. Non-native fishes are indicated with an asterisk (*). Confirmed fish hosts Frequency of occurrence EF Present N=54 EF Absent N=157 Etheostoma nigrum Johnny darter 0.00 0.00 Lepomis macrochirus* Bluegill 0.73 0.63 Micropterus salmoides* Largemouth bass 0.54 0.32 Congenerics of confirmed fish hosts Etheostoma olmstedi Tessellated darter 0.95 0.69 Lepomis cyanellus* Green sunfish 0.43 0.11 Lepomis gibbosus Pumpkinssed 0.77 0.68 Lepomis auritus Redbreast sunfish 0.63 0.43 Lepomis microlophus* Redear sunfish 0.02 0.00 Luxilus cornutus Common shiner 0.00 0.00 Micropterus dolomieu* Smallmouth bass 0.00 0.00 Confirmed fish hosts of congeneric mussels Anguilla rostrata American eel 0.98 0.80 Dorosoma cepedanium Gizzard shad 0.02 0.00 Fundulus diaphanus Banded killifish 0.02 0.03 Gambusia holbrooki Eastern mosquitofish 0.18 0.07 Perca flavescens Yellow perch 0.14 0.20 Pomoxis nigromaculatus* Black crappie 0.13 0.06 Pomoxis annularis* White crappie 0.00 0.01 26
Figure 10. Box-and-whisker plots of environmental variables collected at sites where E. fisheriana was present (P) or absent (A). Conditions at sites with and without E. fisheriana were compared using the Kolmogorov-Smirnov test (water chemistry, habitat, and land use variables) or Mann-Whitney U test (habitat metrics and biological indexes). A P A P A P 4 5 6 7 8 9 pH p < 0.001 0 100 200 300 400 500 Conductivity (µs/cm) 0 400 800 1200 1600 2000 Acid Neutralizing Capacity (µeq/L) A P A P A P p = 0.33 16 18 20 22 24 26 28 Mean Daily Temperature (ºC) p = 0.05 p = 0.03 0 2 4 6 8 10 Dissolved Oxygen (mg/L) p = 0.002 p = 0.42 27 0 5 10 15 20 25 30 35 Dissolved Organic Carbon (mg/L)
Page 1 and 2: Freshwater mussel records collected
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Page 6 and 7: List of Figures Figure Number Page
Page 8 and 9: List of Tables Table Number Page 1.
Page 11 and 12: INTRODUCTION The diversity of fresh
Page 13 and 14: species richness, host abundance, a
Page 15 and 16: Table 1. Number of sites sampled by
Page 17 and 18: Table 2. Frequency of occurrence fo
Page 19 and 20: Figure 3. continued A P A P A P p =
Page 21 and 22: Figure 3. continued A P A P A P 0 5
Page 23 and 24: Since 2007, A. undulata Say 1817 ha
Page 25 and 26: Anodonta implicata Say 1829 was enc
Page 27 and 28: Table 3. Frequency of occurrence fo
Page 29 and 30: Figure 8. continued A P A P A P p =
Page 31 and 32: Figure 8. continued A P A P A P 0 5
Page 33: In 2009, E. fisheriana was collecte
Page 37 and 38: Figure 10. continued. A P A P A P 0
Page 39 and 40: Figure 10. continued A P A P A P 0
Page 41 and 42: Elliptio producta Conrad 1836 has p
Page 43 and 44: Lampsilis radiata radiata Gmelin 17
Page 45 and 46: Leptodea ochracea Say 1817 has been
Page 47 and 48: Pyganodon cataracta had previously
Page 49 and 50: Figure 19. Box-and-whisker plots of
Page 55 and 56: Corbicula fluminea is a non-native
Page 57 and 58: (Black 2001, Wang 2007b). A lack of
Page 59 and 60: Maryland (Cummings and Watters 2009
Page 61 and 62: REFERENCES Allan, J.D., & A.S. Flec
Page 63 and 64: Kelly, M.W., & J.M. Rhymer. 2005. P
Page 65 and 66: ——. 1999a. Effects of alien spe
Page 67 and 68: Young, D. 1911. The implantation of
Page 70 and 71: 8-digit watershed Number 8-digit wa

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