EMAP CP94-95

The CP_DEM_A.DAT, CP_DEM_S.TXT, CP_DEM_L.DAT, CP_DEM_C.DAT data
sets contain demersal trawl data collected at each station in
the EMAP Carolinian Province from 1994-1995. Fishes and
invertebrates (shrimp, crabs, and squid) were collected at each
station with a 4.9-m otter trawl (2.5 cm mesh wings and cod end)
towed against the tidal currents. Tow duration was 10 min wherever
possible and tow speed was 2-3 knots. Two to four tows were conducted
at each station. Fishes and invertebrates captured in the trawls
were carefully removed, sorted and identified to the lowest
possible taxon (usually to species), enumerated, and measured for
length to the nearest mm. In cases where a species was caught in
excessive numbers, a minimum subsample of 30 individuals was
measured for length.
The CP_DEM_A.DAT data set contains unsummarized demersal
abundance data by trawl and taxon. This data set is for use as
the data source for subsequent demersal trawl analyses and summary
calculations (e.g., CP_DEM_L.DAT, CP_DEM_C.DAT are calculated
from the data in CP_DEM_A.DAT).
The CP_DEM_S.TXT data set contains taxonomic classification
information for all demersal taxa observed in trawls
throughout the Carolinian Province from 1994-1995. This data set
is essential to resolve actual taxonomy and species names from
the 8 digit code (variable COD_EMAP) used to identify taxa in
the CP_DEM_A.DAT and CP_DEM_L.DAT data sets. Taxonomic
information includes: phylum, class, order, family, genus,
species, and common name.
The CP_DEM_L.DAT data set contains demersal organism length data
summarized by station and taxon. Summary results included are:
number of lengths measured, mean length, and standard deviation
of lengths, by taxon for each station.
The CP_DEM_C.DAT data set contains summary metrics used to
describe the demersal community at a station. The
summary results included are: number of trawls, mean number of
demersal taxa (species richness) per trawl, mean demersal
abundance per trawl, and Shannon-Weaver Index (H' diversity)
per trawl, for each station.
The following reports are products of these and other data
collected during the 1994-1995 Sampling period in the Carolinian
Province. These reports may contain additional information and
summary statistics that are not contained in this data set
catalog or its respective data sets. We therefore recommend
referring to them when using these data.
Hyland, J.L., T.J. Herrlinger, T.R. Snoots, A.H. Ringwood, R.F.
Van Dolah, C.T. Hackney, G.A. Nelson, J.S. Rosen, and
S.A. Kokkinakis. 1996. Environmental quality of
estuaries of the Carolinian Province: 1994. Annual
statistical summary for the 1994 EMAP-Estuaries
Demonstration Project in the Carolinian Province.
NOAA Technical Memorandum NOS ORCA 97. NOAA/NOS,
Office of Ocean Resources Conservation and Assessment,
Silver Spring, MD. 102 p.
Hyland, J.L., L. Balthis, C.T. Hackney, G. McRae, A.H. Ringwood,
T.R. Snoots, R.F. Van Dolah, and T.L. Wade. 1998.
Environmental quality of estuaries of the Carolinian
Province: 1995. Annual statistical summary for the 1995
EMAP-Estuaries Demonstration Project in the Carolinian
Province. NOAA Technical Memorandum NOS ORCA 123
NOAA/NOS, Office of Ocean Resources Conservation and
Assessment, Silver Spring, MD. 143 p.
See also: McRae and Nelson (1996), Nelson (1995),
Ringwood et al.(1995), Ringwood et al. (1997),
Wheeler et al.(1995), Wheeler et al. (1996).