Dataset: Scallop Survival Assays - Trap CPUE

Name: Data from minnow traps deployed to accompany scallop survival assays conducted as part of a larger concurrent study with Artificial Seagrass Units (ASU) in NC from July to September 2018
Published: 2024-10-11
Keywords: artificial seagrass, fragmentation per se, habitat area, patchiness, bay scallops, density, landscape scale, predators, CPUE, oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.939600.1

Spatial Extent: N:34.706 E:-76.588 S:34.7 W:-76.604

Oscar Shoal in Back Sound, NC, USA

Temporal Extent: 2018-07 - 2018-09

Project:

Collaborative Research: Habitat fragmentation effects on fish diversity at landscape scales: experimental tests of multiple mechanisms (Habitat Fragmentation)

Co-Principal Investigator:

F. Joel Fodrie (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

Scientist:

Amy Yarnall (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

Contact:

F. Joel Fodrie (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

Amy Yarnall (University of North Carolina at Chapel Hill, UNC-Chapel Hill)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2024-10-11

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data from minnow traps deployed to accompany scallop survival assays conducted as part of a larger concurrent study with Artificial Seagrass Units (ASU) in NC from July to September 2018

Abstract:

This dataset contains minnow trap data from deployments performed to accompany scallop survival assays conducted in 2018 (assays across landscape area x fragmentation per se treatments). These data were collected as part of the following study published in Yarnall et al. (2024): To parse the influences of fragmentation components on scallop survival, we generated nine unique landscapes composed of artificial seagrass units (ASUs), were constructed to mimic Zostera marina. These landscapes were part of a larger-scale concurrent experiment, during which we examined seagrass fragmentation effects on estuarine faunal communities (Yarnall et al. In Press). Landscapes were designed to be treatments along orthogonal axes of seagrass percent cover of the landscape footprint (10%, 35%, 60%) and fragmentation per se, indexed by percolation probability (0.1, 0.35, 0.59). To examine the influence of potential scallop predator community density on scallop survival, we deployed two baited minnow traps to accompany each survival assay. All caught fauna were identified to the species level, enumerated, and released. Data were collected by Drs. F. Joel Fodrie and Amy H. Yarnall for the Estuarine Ecology Laboratory of the University of North Carolina at Chapel Hill’s Institute of Marine Sciences.

Expand/Collapse All

Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2024-10-11	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.939600.1	2024-10-11

Description

CPUE = Catch Per Unit Effort
ASU = artificial seagrass unit

Methods & Sampling

To parse the influences of fragmentation components on scallop survival, we generated nine unique landscape grids of 15 × 15 cells. Each cell was the size of an ASU, making the landscape area = 234 m² (18-m × 13-m). These landscapes were part of a larger-scale concurrent experiment, during which we examined seagrass fragmentation effects on estuarine faunal communities (Yarnall et al. In Press). Landscapes were designed to be treatments along orthogonal axes of seagrass percent cover of the landscape footprint (10%, 35%, 60%) and fragmentation per se, indexed by percolation probability (0.1, 0.35, 0.59).

To examine the influence of potential scallop predator community density on scallop survival, we deployed Gee-style minnow traps (41-cm x 22-cm cylinders, 0.3-cm galvanized wire-mesh, with 4-cm dia. funneled openings) baited with ~8 pieces of dry dog food within landscapes to accompany each survival assay. During each survival assay, two traps were haphazardly deployed on ASUs in each landscape >1 m from any scallop tether. During the first assay, traps were only checked after 24 h. For subsequent assays, to better match tether check frequency, traps were checked at 6 h and rechecked at 24 h (i.e., an 18-h deployment). Once it was determined that 24-h cumulative scallop survival would be analyzed, we pooled all fauna caught in 6-h and 24-h traps to obtain total catch per unit effort (a common faunal density metric) after a 24-h deployment. All caught fauna were identified to the species level, enumerated, and released.

Depth note: Depth ranges were similar across all sites as they were located on a single shoal (Oscar Shoal in Back Sound, NC, USA). Depths typically ranged from <0.5 m (at low tide) to 1.5-2 m (at high tide).

Organism identifiers (common name, scientific name, LSID):
bay scallop, Argopecten irradians, urn:lsid:marinespecies.org:taxname:156817
eelgrass, Zostera marina, urn:lsid:marinespecies.org:taxname:495077
* see Supplemental File "Species List" for additional taxonomic information to accompany the trap data.

Problems/Issues

Note: Duplicate rows in this dataset are intentionally included and are from separate individuals of the same species and length caught in the same trap.

Data Processing Description

All data were entered electronically into an Excel spreadsheet.

BCO-DMO Processing

* Sheet "Data" of submitted file "Scallop_Predators_Minnow_Traps_2018.xlsx" was imported into the BCO-DMO data system for this dataset. Values "NA" imported as missing data values.
** In the BCO-DMO data system missing data identifiers are displayed according to the format of data you access. For example, in csv files it will be blank (null) values. In Matlab .mat files it will be NaN values. When viewing data online at BCO-DMO, the missing value will be shown as blank (null) values.

* Column names adjusted to conform to BCO-DMO naming conventions designed to support broad re-use by a variety of research tools and scripting languages. [Only numbers, letters, and underscores. Can not start with a number]

* DateTime with time zone column added "ISO_DateTime_UTC_In." Converted from Date_In and Time_In (from local EST/EDT to UTC) converted to ISO 8601 format.

* Species List added as supplemental file. Contains match information for taxonomic names used in the dataset to names at the World Register of Marine Species (WoRMS) using the WoRMS taxa match tool (https://www.marinespecies.org/aphia.php?p=match). Match performed on 2024-10-08.

* Submitter revised and resubmitted table with file "939600_v1_scallop-survival-assay-trap-cpue_revised.csv" which corrects species names. BCO-DMO data manager made one additional correction Lagadon rhomboides -> Lagodon rhomboides. The revised file was imported into the BCO-DMO data system and provided as the primary data table for version 1 of this dataset (939600_v1_scallop-survival-assay-trap-cpue.csv).

* Submitter revised and resubmitted table with file "939600_v1_scallop-survival-assay-trap-cpue_revised2.csv" which corrects species names. The revised file was imported into the BCO-DMO data system and provided as the primary data table for version 1 of this dataset (939600_v1_scallop-survival-assay-trap-cpue.csv).

* Names checked again and species list supplemental file updated (name match performed on 2024-10-11).

Data Files

File
939600_v1_scallop-survival-assay-trap-cpue.csv (Comma Separated Values (.csv), 60.90 KB) MD5:154b98f1a594a7ce4bfedbda3c517766 Primary data file for dataset ID 939600, version 1

Supplemental Files

File

Species List
filename: 939600_species_list.csv

(Comma Separated Values (.csv), 2.19 KB)
MD5:b8d49e6540aa2517906e1a0fe9c4a590

Unique list of organism taxonomic names used in this dataset matched to taxonomic identifiers. Includes quality information about the match.

Columns:
dataset_Sp_name, Common name as it appears in the dataset column "Sp_name"
dataset_Sci_name, taxonomic name (verbatim) as it appears in the dataset column "Sci_name"
ScientificName_WoRMS, name matched to at the World Register of Marine Species (WoRMs)
LSID, Life Science Identifier (LSID) for the ScientificName_WoRMS
AphiaID, AphiaID for the ScientificName_WoRMS
Match_type, An indication of how closely the dataset Sp_name matches the WoRMS name
Taxon_status, An indication of whether the matched names at WoRMS is the currently accepted name for the organism or is an unaccepted synonym (at the time of the match 2024-10-10)

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1635950

Deployments

None available yet

Instruments

minnow trap

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: minnow trap

Generic Description:

shore fishing gear

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Site_ID	Artificial seagrass unit (ASU) landscape name (Percent cover value-Percolation probability value)	unitless	site
Per_cov	Percent cover of ASUs in 234 m^2 landscape footprint (10, 22.5, 35, 47.5, 60)	percent (%)	percent_cover
Frag	ASU landscape fragmentation per se indexed by percolation probability (0.1, 0.225, 0.35, 0.475, 0.59)	unitless	site_descrip
lat	Landscape latitude north	decimal degrees	lat
lon	Landscape longitude west	decimal degrees	lon
Date_In	Date of minnow trap deployment (local time zone EST/EDT) Format: %Y-%m-%d	unitless	date_local
Time_In	Time of minnow trap deployment (local time zone EST/EDT, 24hr) Format: %H:%M	unitless	time_local
ISO_DateTime_UTC_In	DateTime with timezone of minnow trap deployment (ISO 8601 format in timezone UTC) Format: %Y-%m-%dT%H:%MZ	unitless	ISO_DateTime_UTC
Date_Out	Date of minnow trap retrieval (local time zone EST/EDT) Format: %Y-%m-%d	unitless	date_local
Time_Out	Time of minnow trap retrieval (local time zone EST/EDT, 24hr) Format: %H:%M	unitless	time_local
Check_num	Interval of minnow trap check 6 h, 24 h	unitless	sample_descrip
H_tide	Time of high tide proximate to minnow trap deployment (local time zone EST/EDT, 24hr) Format: %H:%M	unitless	time_local
L_tide	Time of low tide proximate to minnow trap deployment (local time zone EST/EDT, 24hr) Format: %H:%M	unitless	time_local
WaterTemp_C	Surface water temperature at time of minnow trap deployment	degrees C	temp
Sal_PSU	Surface salinity at time of minnow trap deployment	Practical Salinity Units (PSU)	sal
Cell_coord	ASU landscape "cell coordinate" by C (column; out of 15) and R (row; out of 15) number	unitless	site_descrip
Cell_class	ASU type of cell within landscape (Edge = borders sandflat on >=1 side, Interior = does not border sandflat)	unitless	treatment
Sp_name	Common name of fauna species	unitless	common_name
Sci_name	Scientific name of fauna species (See supplemental file 'Species List' for more details of this name including the matched taxonomic identifier)	unitless	verbatimIdentification
Length_mm	Total length of fauna	millimeters (mm)	length

Status message

Database

Contribute Data

Dataset: Scallop Survival Assays - Trap CPUE