Division of Aquatic Resources (DAR), Division of Lands and Natural Resources (DLNR) of the State of Hawaii Fish Stock Surveys from 41 sites on Oahu and Island of Hawaii from 1952-2000 (NODC Accession 0002754)

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Frequently anticipated questions:


What does this data set describe?

Title:
Division of Aquatic Resources (DAR), Division of Lands and Natural Resources (DLNR) of the State of Hawaii Fish Stock Surveys from 41 sites on Oahu and Island of Hawaii from 1952-2000 (NODC Accession 0002754)
Abstract:
Data are from underwater visual surveys of fish stocks from 41 survey sites on the islands of Oahu and Hawaii, conducted by biologists and technicians of Hawaii's Division of Aquatic Resources (DAR). Survey data at Kealakekua Bay, Island of Hawaii, begin in 1952. Data begin in 1968 for all other sites. The datasets end in 2000, although updates are pending.

Serious weaknesses of the data include that (1) transect dimensions were not consistent even within survey sites, and have not generally been recorded on datasheets; (2) survey locations are generally given as place names which are at least somewhat meaningful (e.g. the Monument site at Kealakekua Bay is in front of Cook's Monument), but lat/long of start and end points are not given, and even more fundamentally depth ranges are not given; and (3) some surveys were conducted on SCUBA and some on snorkel but, again, that has not been consistently recorded on datasheets.

Additional DAR data from other locations and dates are planned for digitization.

Supplemental_Information:
Sensor_Name SCUBA Source_Name manual Project_Campaign: Dingle Johnson (DJ) Sport Fish Restoration and Operational DAR Function Originating_Center Division of Aquatic Resources, Division of Lands and Natural Resources, State of Hawaii Storage_Medium MS Access and MS Word Online_size: 30389 kbytes

Resource Description: NODC Accession Number 0002754

  1. How should this data set be cited?

    Dr. Dan Polhemus Division of Aquatic Resources (DAR), Division of Lands and Natural Resources (DLNR) of the State of Hawaii, and Dr. Ivor Williams Division of Aquatic Resources (DAR), Division of Lands and Natural Resources (DLNR) of the State of Hawaii, Unpublished material, Division of Aquatic Resources (DAR), Division of Lands and Natural Resources (DLNR) of the State of Hawaii Fish Stock Surveys from 41 sites on Oahu and Island of Hawaii from 1952-2000 (NODC Accession 0002754).

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -158.043
    East_Bounding_Coordinate: -155.849
    North_Bounding_Coordinate: 21.675
    South_Bounding_Coordinate: 19.479

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Beginning_Date: 11-Sep-1952
    Ending_Date: 28-Dec-2000
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

    2. What coordinate system is used to represent geographic features?

  7. How does the data set describe geographic features?

    Entity_and_Attribute_Overview:
    I. Original files Directory: ../../data/original

    filename comment DAR DJ Fish Survey.mdb MS Access database of surveys DAR DJ Fish Surveys Notes.doc documentation

    II. NODC Archive Files Directory: ../../data/nodc

    filename comment DJ_Notes.doc rename of DAR DJ Fish Survey.doc DJ_Notes.txt ASCII copy of DJ_Notes.doc DJ_Survey.mdb rename of DAR DJ Fish Survey.mdb

    The following files are TABLES from this database as MS Excel spreadsheets (*.xls) and redundant ASCII comma separated versions (*.csv). 1. Location.xls and Location.csv Field Name Comment SiteID The code is usually generated using the first letter of the island and two letters of the site name, (ie., Oahu, Hanauma Bay = O_HA) SiteName common name for the survey location Area general description of the area and DAR management status Island the island where the survey is located DARVariants Other variations of site codes that are used within DAR for data entry

    2. Round.xls and Round.csv Field Name Comment RoundID Code by year Start Date beginning date of surveys for given year End Date ending date of surveys for given year MethodCode RES.FISH refers to Resource Fish method Mid Date middle of survey period

    3. Species_List.xls and Species_List.csv Field Name Comment TaxonID standardized taxa ID SpeciesCode internal DAR code Common Name name commonly used Family specimen family DAR Code internal DAR code Hawaiian Name Hawaiian language name Synonym other names for the same species

    4. Surveys.xls and Surveys.csv Field Name Comment SiteforRoundID internal DAR code RoundID see table Round SiteID see table Location Date Date of survey Comments DJ Sheet Found? yes or no Original DAR file filename Notes Survey Area (ft) feet squared Survey Area (m2) meters squared Snorkle/Scuba which type File Survey Area (ft2) feet squared Sheet Survey Area (ft2) feet squared Visibility (ft) distance of sight (feet) DJ Survey Code internal DAR code Observer1 Observer name Observer2 Observer name Observer3 Observer name

    5. Transect.xls and Transect.csv Field Name Comment TransectRunID DAR internal use SiteforRoundID see table Surveys ObserverID DAR internal use Date date of transect Time time of transect Transect DAR internal use DJ Survey Code DAR internal use ValidData yes/no

    6. TransectObservations1.xls and TransectObservations1.csv Field Name Comment ObservationID DAR internal use TransectRunID DAR internal use, see Table Transect SpeciesCode see Table Species Number count of given species Size (cm) size of species Variant unused Notes Valid Data yes/no

    7. TransectObservations2.xls and TransectObservations2.csv (see TransectObservations1, the original table had to be broken into two speadsheets during export from MS Access).

    Entity_and_Attribute_Detail_Citation: none


Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    Dingle Johnson (DJ) Sport Fish Restoration Grants, Division of Aquatic Resources, Division of Lands and Natural Resources, State of Hawaii

  3. To whom should users address questions about the data?

    Dr. Ivor Williams
    Division of Aquatic Resources, Division of Lands and Natural Resources, State of Hawaii
    Marine biologist
    74-380 B Kealakehe Pkwy
    Kailua-Kona, Hawaii 96740
    USA

    (808) 327 6231 (voice)
    ivor@hawaii.edu


Why was the data set created?

Support restoration of sport fish and sustainability of ecosystem resources


How was the data set created?

  1. From what previous works were the data drawn?

  2. How were the data generated, processed, and modified?

    Date: Unknown (process 1 of 1)
    Serious weaknesses of the data include that (1) transect dimensions were not consistent even within survey sites, and have not generally been recorded on datasheets; (2) survey locations are generally given as place names which are at least somewhat meaningful (e.g. the Monument site at Kealakekua Bay is in front of Cook's Monument), but lat/long of start and end points are not given, and even more fundamentally depth ranges are not given; and (3) some surveys were conducted on SCUBA and some on snorkel, but, again, that has not been consistently recorded on datasheets.

    All surveys done by pairs of divers (or snorkellers) either following a transect or a known stretch of shoreline. Divers swam in parallel recording the number, size (in inches) and taxa of all fishes within non-overlapping transects (i.e. each diver maintained a separate count-- the data were later pooled). Transect widths were generally 40ft (20ft on either side of each observer) for divers on snorkel and 20ft (10ft on each side of each observer) for snorkel surveys.

    At Waikiki , surveys started and ended at known shoreline reference points, but mostly had lengths of around 300 to 400yds. For that location only, survey area estimates in the database are likely to be reliable.

    At all other locations, survey lengths were generally (but apparently not always) 250yds. The survey transect was demarcated by laying out a weighted line from a boat starting from a standard triangulated position (location of which was known to existing staff) and in a standard direction. After a full 250 yd line has been laid out, the boat would return to the starting point and 2 divers or snorkellers would enter the water and follow the laid out line (hence considerable variability among the exact areas covered each time).

    The attached database includes a record for each survey, with location and date (and when know, observers), and with information on whether surveys were done by snorkel and survey. For each record, survey area (m2) is given based on a variety of existing DAR records. It is probably reasonable to assume that survey areas of Waikiki transects are accurate, but all others are potentially wildly inaccurate. Default assumption for non-Waikiki should be that surveys were 250 yds long by 80ft wide for SCUBA surveys (each diver doing 250yds*40ft) and half that for snorkel surveys. However, as should be very apparent, it would be wise to rely too heavily on those assumptions.

    Data were not centrally stored in electronic form, but copies of data sheets can still be unearthed at various storage areas in the DAR Oahu office. Starting in late 2003, DAR staff have gradually entered some of the data into an MS Access database, ie., the data included here. Considerably more data exists on data sheets for a variety of locations on Hawaii and Maui, and from Hanauma Bay on Oahu, and will be added to this database over the coming years.

    Person who carried out this activity:

    Dr. Ivor Williams
    Division of Aquatic Resources, Division of Lands and Natural Resources, State of Hawaii
    Marine biologist
    74-380 B Kealakehe Pkwy
    Kailua-Kona, Hawaii 96740
    USA

    (808) 327 6231 (voice)
    ivor@hawaii.edu

  3. What similar or related data should the user be aware of?


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

  2. How accurate are the geographic locations?

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    none

  5. How consistent are the relationships among the observations, including topology?

    see lineage, process step


How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints: None
Use_Constraints: Dataset credit required

  1. Who distributes the data set? (Distributor 1 of 1)

    NOAA/NESDIS/National Oceanographic Data Center
    Attn: User Services Team
    SSMC-3 Fourth Floor
    Silver Spring, MD 20910-3282
    USA

    301-713-3277 (voice)
    301-713-3302 (FAX)
    NODC.Services@noaa.gov

    Hours_of_Service: 8am-5pm, Monday through Friday
  2. What's the catalog number I need to order this data set?

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    NOAA makes no warranty regarding these data, expressed or implied, nor does the fact of distribution constitute such a warranty. NOAA and NODC cannot assume liability for any damages caused by any errors or omissions in these data, nor as a result of the failure of these data to function on a particular system.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 07-Dec-2012
Last Reviewed: 11-Jan-2010
Metadata author:
Mr. Patrick C. Caldwell
NOAA/NESDIS/NODC/NCDDC
Hawaii/US Pacific Liaison
1000 Pope Road, MSB 316
Honolulu, Hawaii 96822
USA

(808)-956-4105 (voice)
(808) 956-2352 (FAX)
caldwell@hawaii.edu

Hours_of_Service: 8 AM to 5 PM weekdays
Contact_Instructions: check services@nodc.noaa.gov if not available
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)


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