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An Ecological Study of Gunston Cove
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ii An Ecological Study of Gunston C
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iv were collected on three sample d
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vi We recommend that: 1. Long term
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2 INTRODUCTION This section reports
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4 Table 1 Sampling Dates and Weathe
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6 immediately with formalin to a co
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8 subsample of known volume and res
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10 A. Climate and Hydrological Fact
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12 B. Physico-chemical Parameters:
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14 Dissolved Oxygen (mg/L) 16 14 12
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16 pH, NC Lab 9.5 9.0 8.5 8.0 7.5 7
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18 Secchi Depth (m) 1.2 1.0 0.8 0.6
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20 Ammonia Nitrogen (mg/L) 0.30 0.2
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22 Organic Nitrogen (mg/L) 1.2 1.0
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24 N/P Ratio (by mass) 60 50 40 30
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26 C. Phytoplankton Chlorophyll a,
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28 Figure 32. Phytoplankton Density
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30 The dominant cyanobacteria on a
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32 Total phytoplankton biovolume ca
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34 Melosira Figure 44. Phytoplankto
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36 Bosmina Density by Station (#/L)
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38 Moina Density by Station (#/m 3
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40 Diaptomus Density by Station (#/
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42 E. Ichthoplankton Larval fishes
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44 Clupeid Larvae (#/10m 3 ) 50 40
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46 Table 4 Adult and Juvenile Fish
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48 The abundance of each species in
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50 Average Number of Fish per Trawl
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52 Table 7 Adult and Juvenile Fish
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54 Table 9 Adult and Juvenile Fish
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56 Average Fish per Seine 600 500 4
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58 Macrobenthos (#/m 2 ) 500 400 30
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60 Total phosphorus levels were fai
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62 Table 10 Correlation and Linear
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64 Water Temperature (oC) 35 30 25
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66 Chloride (mg/L) 350 300 250 200
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68 Dissolved Oxygen (% saturation)
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70 Light Attenuation Coefficient (m
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72 Lab pH, GMU 11 10 9 8 7 Station
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74 Total Alkalinity (mg/L CaCO3), G
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76 Biochemical Oxygen Demand (mg/L)
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78 Volatile Suspended Solids (mg/L)
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80 Soluble Reactive Phosphorus (mg/
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82 Un-ionized Ammonia Nitrogen (mg/
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84 Nitrite Nitrogen (mg/L) 0.100 0.
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86 Nitrogen:Phosphorus Ratio 70 60
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88 Chlorophyll a, Surface (ug/L) 10
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90 PBmax (ug C/ug Chl a/hr) 30 25 2
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92 D. Zooplankton Trends: 1990-2003
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94 Brachionus (#/L) 1000.0 100.0 10
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96 Filinia (#/L) 1000.0 100.0 10.0
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98 Polyarthra (#/L) 1000.0 100.0 10
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100 Diaphanosoma (#/m3) 100000.00 1
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102 Chydorid Cladocera (#/m3) 1000.
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104 Copepod Nauplii (#/L) 1000.0 10
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106 Clupeid Larvae (#/10m3) 1000.0
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108 Atherinid Larvae (#/10m3) 10.00
- Page 117 and 118: 110 F. Adult and Juvenile Fish Tren
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- Page 121 and 122: 114 Table 15 Mean catch of adult an
- Page 123 and 124: 116 Table 17 Mean catch of adult an
- Page 125 and 126: 118 Mean Catch Per Trawl 50 40 30 2
- Page 127 and 128: 120 Mean Catch Per Trawl 8 6 4 2 Tr
- Page 129 and 130: 122 Mean Catch Per Trawl 120 100 80
- Page 131 and 132: 124 Mean Catch Per Trawl 16 14 12 1
- Page 133 and 134: 126 Seines The mean annual catch pe
- Page 135 and 136: 128 Table 19 The number of seines i
- Page 137 and 138: 130 Mean Catch Per Seine 300 250 20
- Page 139 and 140: 132 Mean Catch Per Seine 250 200 15
- Page 141 and 142: 134 G. Benthos Trends Oligochaetes
- Page 143 and 144: 136 Amphipods (#/m2) 16 12 8 4 Stat
- Page 145 and 146: 138 Corbicula (#/m2) 40 30 20 10 St
- Page 147 and 148: 140 Table 21 Summary of Important T
- Page 149 and 150: 142 observed through 1995. This has
- Page 151 and 152: 144 being filled. A dredged channel
- Page 153 and 154: 146 Anadromous Fish Survey Pohick,
- Page 155 and 156: 148 sized fishes were seen, an atte
- Page 157 and 158: 150 Table 3. Fish eggs and larvae c
- Page 159 and 160: 152 Total 7 11 237 13 2 64 119 (2.3
- Page 161 and 162: 154 Table 7. Adult anadromous and s
- Page 163 and 164: 156 Table 8. Summary of alewife spa
- Page 165 and 166: 158 Spawning information on gizzard
- Page 167: 160 The information that pertains t
- Page 171 and 172: 164 Table 13. Catches of adult clup
- Page 173 and 174: Appendix A Phytoplankton Species Di