appendix b final 2008 biological surveys of los angeles and long ...

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4.0 Ichthyoplankton The ichthyoplankton stations were designated as being in one of three general areas (Table 4.4-2): deep outer harbor (seven stations), shallow outer harbor (four stations), and inner harbor (eight stations). The average weighted mean abundance of larval fish in each of these three areas was: shallow outer harbor 1,523/100m 2 , inner harbor 1,297/m 2 , and deep outer harbor 1,157/100m 2 . The range of values in each area was variable; for example, the value for the shallow outer area was the highest based on the large number of larvae found at station LA7 (4,381/100m 2 in Tables 4.3-3 and 4.3-5). The other three stations designated shallow outer were much lower ranging from 257 to 588 larvae/100m 2 . 4.5 METHOD COMPARISON STUDY RESULTS The comparison of the two sampling approaches was based on two analyses. First, total larval abundance (#/100m 2 ) in paired samples (three-net sampling vs. CalCOFI-type sampling - Table 4.5-1) was compared by calculating the difference between the two samples and testing the hypothesis that the average difference was zero. Since the differences were not normally distributed, abundance data were transformed (log 10 ) prior to calculating differences. As Table 4.5-1 shows, the three-net method overall yielded somewhat higher abundances than the CalCOFI method, although in five of the twenty sample pairs abundances were lower in the three-net samples. The statistical analysis showed that the average difference was not significantly different from zero, but a power analysis showed that due to the small sample size and variation in the data, there was only a 7 percent chance that a difference from zero could have been detected. Since acceptable levels of power for such tests are 70 percent or greater, the results of this analysis do not support a comparison of the two methods. The second analysis compared the Bray-Curtis similarity between the paired samples collected using the two methods. The average similarity between the paired samples at the ten stations was 56.8 percent (Table 4.5-1). The average Bray-Curtis similarity among the 171 possible sample pairs based on the average abundances for the three surveys at all 19 stations was slightly higher, at 57.3 percent. The average similarity between paired samples at the ten stations would be expected to be much greater than the average based on a random sample of all of the samples if the CalCOFI-type sampling was effective at replicating the sampling done with the three nets. Although the result of the statistical comparison was unable to detect a statistically significant difference between the two methods, the overall results were inconclusive. Due to the patchiness of plankton, filtering larger volumes of water increases the chance of collecting a more representative cross section of the ichthyoplankton composition, but will also increase the sample processing time and cost. It is recommended that for future studies in the Port complex the current three-net method be continued with a modification to the midwater collection. It is suggested that the surface and epibenthic sampling continue without change. These techniques allow more water in these two strata to be filtered than does the CalCOFI technique. This increases the chance of collecting rare taxa that might be in higher concentrations in these two strata than in the midwater. However, it is recommended that the ‘steps’ in the current midwater sampling be eliminated. These ‘steps’ introduce potential biases into the data by oversampling the depth strata where the net was during its ‘steps’. It is also impossible to replicate the exact depth strata used at each station or between surveys at a particular station due to factors such as vessel, wind, current speeds, and length of tow cable. Therefore, it is recommended that during any future midwater collection the net be deployed in a similar fashion to that used during the CalCOFI-type tows in this study, where the nets deployment and retrieval speeds through the water column be constant so that all depths are evenly sampled. 2008 Biological Surveys of Los Angeles and Long Beach Harbors 4–7 April 2010
4.0 Ichthyoplankton Table 4.3-1. Total (#/100 m 3 ) and weighted mean abundance (#/100 m 2 ) of fish eggs collected during the three 2008 surveys (all surveys and stations combined). Taxonomic Name fish eggs (undeveloped) Sciaenidae/Paralichthyidae unid. Sciaenidae/Paralichthyidae/ Labridae unid. Common Name undeveloped fish eggs croaker/flatfish fish eggs croaker/flatfish/w rasse fish eggs Neuston (#/100 m 3 ) Midwater (#/100 m 3 ) Epibenthic (#/100 m 3 ) Weighted Mean Abundance (#/100 m 2 ) % of total 772.07 425.22 409.02 4,991.08 92.39 30.87 7.47 5.36 88.51 1.64 9.57 4.37 4.07 75.23 1.39 Citharichthys spp. sanddab eggs 12.52 6.05 2.57 68.41 1.27 Pleuronichthys spp. turbot eggs 6.38 2.39 4.39 43.47 0.80 Paralichthyidae unid. sand flounder 2.32 2.61 3.79 37.32 0.69 eggs Sciaenidae unid. croaker eggs 5.37 2.99 1.48 36.27 0.67 Engraulis mordax northern anchovy 1.93 1.41 0.91 20.85 0.39 eggs fish eggs unid. unidentified fish 2.86 1.09 0.69 12.95 0.24 eggs poss. Sciaenidae unid. possible croaker 0.77 0.94 0.23 11.57 0.21 eggs Engraulidae unid. anchovy eggs 0.07 0.42 0.06 8.11 0.15 Labridae/Paralichthyidae wrasse /flatfish 1.63 0.47 0.35 6.98 0.13 fish eggs Labridae unid. wrasse eggs 0.04 0.53 0.01 Atherinops affinis topsmelt eggs 0.02 0.03 0.23 0.00 poss. Xystreurys liolepis poss. fantail sole 0.02 0.22 0.00 eggs Pleuronectiformes unid. flatfish eggs 0.02 0.21 0.00 Labridae/Serranidae unid. wrasse eggs 0.53 0.09 0.00 Paralichthys californicus California halibut 0.25 0.04 0.07 0.00 eggs poss. Paralichthys californicus poss. California 0.15 0.03 0.00 halibut eggs Genyonemus lineatus white croaker 0.02 0.01 0.00 eggs Total 847.30 455.51 433.01 5,402.12 “poss” = possible 4–8 2008 Biological Surveys of Los Angeles and Long Beach Harbors April 2010
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APPENDIX B FINAL 2008 BIOLOGICAL SU
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FINAL 2008 BIOLOGICAL SURVEYS OF LO
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Table of Contents 3.4.3 Summary of
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Table of Contents 8.2.1 Aerial Phot
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Table of Contents Table 3.4-2. Tabl
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Table of Contents Table 8.3-3. Tabl
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Table of Contents Figure 6.2-1. Rip
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Table of Contents This page intenti
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Executive Summary otter trawls to s
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Executive Summary Van Veen) and ana
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Executive Summary which was collect
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1.0 Introduction 1.0 INTRODUCTION T
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1.0 Introduction 1.4 STUDY OBJECTIV
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1.0 Introduction Historical compari
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1.0 Introduction Figure 1.1-2. Map
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CHAPTER 2 WATER QUALITY
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2.0 Water Quality The CTD was deplo
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2.0 Water Quality Outer Harbor area
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2.0 Water Quality Table 2.2-1. Wate
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2.0 Water Quality Figure 2.2-1. Wat
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6.0 Riprap Biota sea cucumber (Para
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6.0 Riprap Biota polychaete worms.
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6.0 Riprap Biota Table 6.3-1. Mean
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6.0 Riprap Biota Figure 6.2-1. Ripr
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7.0 Kelp and Macroalgae 7.0 KELP AN
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7.0 Kelp and Macroalgae the laborat
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7.0 Kelp and Macroalgae sediment us
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7.0 Kelp and Macroalgae Overall, ou
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7.0 Kelp and Macroalgae pose a sign
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7.0 Kelp and Macroalgae Figure 7.2-
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CHAPTER 8 EELGRASS
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8.0 Eelgrass distribution of eelgra
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8.0 Eelgrass adjacent to most trans
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8.0 Eelgrass load on the plants was
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8.0 Eelgrass (Table 8.3-5), based o
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8.0 Eelgrass surveys. No eelgrass b
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8.0 Eelgrass Areas containing eelgr
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8.0 Eelgrass Seasonal patterns amon
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8.0 Eelgrass 2002) inferred that th
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8.0 Eelgrass Table 8.3-2. Spring 20
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8.0 Eelgrass Table 8.3-4. Fall 2008
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8.0 Eelgrass Table 8.3-12. Oceanic
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8.0 Eelgrass Figure 8.3-2. Eelgrass
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8.0 Eelgrass Figure 8.3-6. Spatial
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9.0 Birds 9.0 BIRDS 9.1 INTRODUCTIO
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9.0 Birds changes in species number
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9.0 Birds the Brown Pelican populat
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9.0 Birds 9.4.2.10 9.4.2.11 9.4.2.1
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9.0 Birds 9.5.1 Distribution and Ab
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9.0 Birds discussed in Section 9.4.
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9.0 Birds Angeles Harbor. The relat
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9.0 Birds Table 9.4-1. Percent Comp
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9.0 Birds Table 9.4-3. Nest Numbers
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9.0 Birds Table 9.5-2. Species Comp
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9.0 Birds Table 9.5-4. Percent Comp
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9.0 Birds Table 9.6-1. Historical C
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9.0 Birds 70 12000 60 10000 50 40 3
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9.0 Birds 3500 shallow water sandy
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9.0 Birds 40 35 30 riprap aerial Nu
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9.0 Birds Number Observed 3500 3000
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9.0 Birds Figure 9.5-1. Total numbe
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9.0 Birds Number of Individuals 400
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9.0 Birds 7000 Mean Number of Indiv
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CHAPTER 10 MARINE MAMMALS
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10.0 Marine Mammals Gray whales dif
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10.0 Marine Mammals This page inten
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11.0 References 11.0 REFERENCES Abb
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11.0 References Dennison, W.C. and
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11.0 References Jacques, D.L., C.S.
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11.0 References North, W.J. 1983. S
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APPENDIX A STATION LOCATIONS
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Appendix A Station Coordinates (NAD
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Appendix B (A) Temperature (°C), S
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APPENDIX C FISHES
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Appendix C Table C-1. Combined Fish
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Appendix C LA01 LA02 LA03 LA04 LA05
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Appendix C Table C-3. Otter Trawl C
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Appendix C Table C-5. Otter Trawl B
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Appendix C Table C-7. Otter Trawl B
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Appendix C Table C-8. Lampara Catch
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Appendix C Table C-10. Lampara Catc
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Appendix C Scientific Name Table C-
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Appendix C Table C-14. Beach Seine
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Appendix D Table D-1. Ichthyoplankt
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Appendix D fish eggs (undeveloped)
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Appendix D fish eggs unid. unidenti
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fish eggs unid. unidentified fish e
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Appendix D Eggs Oligocottus / Clino
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Appendix D Eggs Rhinogobiops nichol
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Appendix D Juvenile Eggs Heterostic
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Appendix D Eggs Liparis spp. snailf
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Appendix D Juvenile Eggs Heterostic
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Appendix D Table D-11. Ichthyoplank
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APPENDIX E INFAUNA
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Appendix E Taxon LA-1 LA-10 LA-11 L
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Appendix E Protothaca laciniata Tax
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Appendix E Taxon LA1 LA2 LA3 LA4 LA
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Appendix E Table E-4. Otter Trawl,
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Appendix E Taxon LA1 LA2 LA3 LA4 LA
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Appendix E Octopus sp. 1 Philine sp
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Appendix E This page intentionally
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Appendix F Table F-1. Total Abundan
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Appendix F LARR-1 LARR-2 LARR-3 LAR
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APPENDIX G KELP AND MACROALGAE
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Appendix G Date Survey Site Observe
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Appendix G Species T1 T2 T3 T4 T5 T
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Appendix H APPENDIX H-1 AVIAN ECOLO
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Appendix H Table H-1. Avian Ecologi
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Appendix H GUILD 8 - UPLAND BIRDS G
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Appendix H APPENDIX H-2 NUMBER OF I
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Appendix H Table H-2. December A 20
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Appendix H Table H-3. December B 20
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Appendix H Table H-4. January A 200
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Appendix H Table H-5. January B 200
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Appendix H Table H-6. February A 20
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Appendix H Table H-7. February B 20
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Appendix H Table H-8. March A 2008
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Appendix H Table H-9. March B 2008
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Appendix H Table H-10. April A 2008
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Appendix H Table H-11. May A 2008 S
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Appendix H Table H-13. July A 2008
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Appendix H Table H-15. August B 200
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Appendix H Table H-16. September A
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Appendix H Table H-17. September B
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Appendix H Species Totals Zones 1 2
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Appendix H Species Totals Zones 1 2
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Appendix H Zones Species Totals 1 2
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Appendix H Zones Species Totals 1 2
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Appendix H Date ELEGANT TERN — OB
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APPENDIX I MARINE MAMMALS
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Appendix I Common Survey Station/ N
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Appendix I Common Name Survey Type
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Appendix I This page intentionally
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