8792 Data Set Published / External 74897 Archival Project Completed 1992-05-05 Ichthyoplankton sampling was conducted aboard the NOAA vessel Townsend Cromwell in 9-29 July 1984 and 4-10 February 1985. Collectors included George Boehlert, James Uchiyama, Robert Humphreys, Randolph Chang, Alan Everson, Victor Honda, Bert Kikkawa, Raymond Clarke, Thomas Kazama, and Michael Seki. Two locations were sampled intensively during these cruises; one location was over the seamount summit ("seamount" location); the other location was 20 km west, over a water depth of approximately 1,800-4,750 m ("reference" location). Ichthyoplankton was sampled with an opening-closing Tucker trawl equipped with three nets and a double-release mechanism operated by messengers. The nets were 0.333 mm mesh (Nitex) with a 1.4 m2 mouth area. Ship speed was adjusted over tow speeds of about 0.9-1.1 m/second to maintain a wire angle at 45?. At this angle, the effective mouth area of the Tucker trawl is 1.0 m2 ; tow depths were estimated as a function of wire angle and meters of wire out. Four discrete depth strata (0-25, 25-50, 50-100, and 100-200 m) were sampled. Replicate tows at each depth comprised a sampling series. To sample at discrete depths without contamination by animals from shallower depths, the trawl was lowered with the first net open, and the second net was opened for the desired sampling time and then closed, and the trawl was retrieved with the third net open. To sample the two shallower strata, the trawl was lowered to 50 m, the second net was opened at that depth, and then the third net was opened at 25 m to sample the shallow stratum. For the two deeper strata, the second net was closed at the upper end of each stratum, and the trawl was retrieved with the third net open. Thus, a full set of duplicate samples for each depth stratum required six deployments of the trawl. The summer cruise had two series of night sampling (9-10 and 28-29 July) and one of day sampling (14-15 July); the winter cruise had one series of day and night sampling (4-10 February 1985). Each net was fished for 18 minutes and tows were conducted in a stepped oblique fashion, in an attempt to sample depths equally within each stratum. The volume of water filtered was estimated with calibrated General Oceanics flowmeters mounted in the center of each net. Plankton samples were preserved at sea in a 4% buffered formaldehyde seawater mixture. In the laboratory, plankton volume was determined from a known total volume minus the remaining water volume after the plankton were strained (Omori and Ikeda 1984); gelatinous plankton and fishes larger than approximately 50 mm were removed before the volume was determined. Whole samples were sorted for fish eggs, larvae, and squid para larvae under a dissecting microscope. Larval fishes were identified to the lowest possible taxonomic level by Bruce Mundy. To compare ichthyoplankton species composition, distribution, and abundance in the Hancock Seamounts. 3,072 records The data are available in Boehlert & Mundy (1992. Distribution of ichthyoplankton around Southeast Hancock Seamount, central North Pacific, in summer 1984 and winter 1985: data report. NOAA Tech. Memo. NMFS, NOAA-TM-NMFSSWFSC-176: 1?109). SOURCE ID: RB006 Theme FRMD Theme LHP Theme PIFSC Theme Townsend Cromwell Theme distribution Theme eez Theme ichthyoplankton Theme plankton Theme seamount Theme tucker trawl Spatial Hancock Seamounts Pacific Islands Fisheries Science Center Honolulu HI USA Data Set Oracle Database None Planned Table (digital) N/A Townsend Cromwell, NOAA R/V Midwater and IK Trawls 55388 Published / External Spreadsheet Yes This spreadsheet provides a description for each species code used in the data 1 SPECIES_CODE VARCHAR2 10 No No Active Ten-digit CZM species code for the species caught 2 SPECIES_NAME VARCHAR2 150 No No Active Name of the species caught 55439 RB006AA2_V Published / External Completed Nekton and plankton composition log data collected at Hancock Seamount in July 1984 and February 1985. Data Table Yes Nekton and plankton composition log data collected at Hancock Seamount in July 1984 and February 1985. 1 DATASET_CODE Character 5 No No Active Source ID Code assigned by the data entry staff. Character 2 VERSION_CODE Character 3 No No Active Code for the format version assigned by the data entry staff. Character 3 VESSEL_CODE Character 3 No No Active Code for the vessel. Character 001 = NOAA R/V TOWNSEND CROMWELL 4 CRUISE_NUMBER Number 4 No No Active Last two digits of the year of the cruise and two digits incremental number of the cruise for the year. Number 5 TRAWL_YEAR Number 4 No No Active Year of the trawl operation. Number 6 TRAWL_MONTH Number 2 No No Active Month of the trawl operation. Number 7 TRAWL_DAY Number 2 No No Active Day of the trawl operation. Number 8 STATION_NUMBER Number 3 No No Active Station number of the trawl operation. Number 9 GEAR_CODE Number 2 No No Active Code for the type of trawl. Number 10 SAMPLE_CODE_1 Number 22 No No Active Code for replicate. Number 11 SAMPLE_CODE_2 Number 22 No No Active Code for net number. Number 12 SAMPLE_CODE_3 Number 3 No No Active Code for sample number. Number 13 LOCATION_CODE_1 Number 1 No No Active Code for the bank or area classification - arbitrarily determined when necessary. Number 14 LOCATION_CODE_2 Number 1 No No Active Code for the directional field. Number 15 LOCATION_CODE_3 Number 1 No No Active Code for the distance category. Number 16 LOCATION_CODE_4 Number 1 No No Active Code for the temperal category. Number 17 START_LATITUDE_DEGREES Number 2 No No Active Starting latitude degrees of the trawl operation, in degrees. Units for values are degrees. Number degrees 18 START_LATITUDE_MINUTES Number 4 No No 1 Active Starting latitude minutes of the trawl operation, in tenths of a minute. During data entry, the decimal point was omitted; it has been inserted into the data. Units for values are minutes. Measures are reported with a precision of 3. Number minutes 19 START_LATITUDE_DIRECTION Character 1 No No Active Starting latitude direction of the trawl operation. Character N = NORTH S = SOUTH 20 START_LATITUDE_DD Number 16 No No 13 Active Computed starting latitude of the trawl operation, in decimal degrees. Positive values are North latitudes; negative values are South latitudes. Units for values are degrees. Measures are reported with a precision of 15. Number degrees 21 START_LONGITUDE_DEGREES Number 3 No No Active Starting longitude degrees of the trawl operation, in degrees. Units for values are degrees. Number degrees 22 START_LONGITUDE_MINUTES Number 4 No No 1 Active Starting longitude minutes of the trawl operation, in tenths of a minute. During data entry, the decimal point was omitted; it has been inserted into the data. Units for values are minutes. Measures are reported with a precision of 3. Number minutes 23 START_LONGITUDE_DIRECTION Character 1 No No Active Starting longitude direction of the trawl operation. Character E = EAST W = WEST 24 START_LONGITUDE_DD Number 16 No No 12 Active Computed starting longitude of the trawl operation, in decimal degrees. Positive values are East longitudes; negative values are West longitudes. Units for values are degrees. Measures are reported with a precision of 15. Number degrees 25 START_TIME Number 4 No No Active Start time of the trawl operation. Number 26 END_TIME Number 4 No No Active End time of the trawl operation. Number 27 TOW_TYPE_CODE_1 Number 1 No No Active Code for opening-closing. Number 28 TOW_TYPE_CODE_2 Number 1 No No Active Code for the type of net - single-paired-mulitple. Number 29 TOW_TYPE_CODE_3 Number 1 No No Active Code for the directional of tow. Number 30 MINIMUM_DEPTH Number 4 No No Active Minimum depth, in meters. Units for values are meters. Number meters 31 MAXIMUM_DEPTH Number 4 No No Active Maximum depth, in meters. Units for values are meters. Number meters 32 WATER_VOLUME_FILTERED Number 7 No No 1 Active Water volume filtered, in tenths of a cubic meter. During data entry, the decimal point was omitted; it has been inserted into the data. Units for values are cubic meters. Measures are reported with a precision of 6. Number cubic meters 33 SAMPLE_VOLUME Number 5 No No Active Sample volume, in milliliters. Units for values are milliliters. Number milliliters 34 TOTAL_NUMBER Number 4 No No Active Total number of larvae. Number 35 MINIMUM_TEMPERATURE Number 4 No No Active Minimum temperature, in tenths of degree Celsius. Units for values are degrees Celsius. Number degrees Celsius 36 MAXIMUM_TEMPERATURE Number 4 No No Active Maximum temperature, in tenths of a degree Celsius. Units for values are degrees Celsius. Number degrees Celsius 37 MEAN_TEMPERATURE Number 4 No No Active Mean temperature, in tenths of a degree Celsius. Units for values are degrees Celsius. Number degrees Celsius 38 MINIMUM_SALINITY Number 5 No No Active Minimum salinity, in hundredths of a part per thousand. Units for values are ppt. Number ppt 39 MAXIMUM_SALINITY Number 5 No No Active Maximum salinity, in hundredths of a part per thousand. Units for values are ppt. Number ppt 40 MEAN_SALINITY Number 5 No No Active Mean salinity, in hundredths of a part per thousand. Units for values are ppt. Number ppt 41 ROW_NUMBER Number 3 No No Active A consecutive number for each entry on the data collection form. Number 42 SPECIES_CODE Number 10 No No Active Czm code for the species. Number 43 NUMBER_SPECIES Number 4 No No Active Number of species in the sample. Number 44 JOB_NUMBER Character 6 No No Active A consecutive number assigned by the data entry staff to a block of data that is entered and verified. Format DYYNNN, where D is constant, YY is the last two digits of the year and NNN is the consecutive number that starts with 001 at the beginning of each calendar year, e.g., D87232. Character 45 SEQUENCE_NUMBER Number 8 No No Active A consecutive number assigned to each record for a block of data. Number 46 DATE_LOADED Date 22 No No Active Date when the record was loaded into Oracle or updated. Date Data Steward 2019-04-01 2023-05 Person O'Malley, Joseph M joseph.omalley@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5741 Contact via email Data Steward 2015 2019-03-31 Person Miyamoto, Brent M brent.miyamoto@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5340 8:15 a.m. - 5:15 p.m. HST Distributor 2015 Organization Pacific Islands Fisheries Science Center PIFSC pifsc.info@noaa.gov https://ror.org/02apffz65 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5360 https://www.pifsc.noaa.gov Pacific Island Fisheries Science Center homepage Online Resource 8:00 a.m. - 4:30 p.m. Metadata Contact 2019-04-01 2023-05 Person O'Malley, Joseph M joseph.omalley@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5741 Contact via email Metadata Contact 2015 2018-12-31 Person Tagami, Darryl T darryl.tagami@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5745 8:00 AM - 4:30 PM Point of Contact 2023-08 Person Schemmel, Eva M eva.schemmel@noaa.gov Contact via email. Point of Contact 2019-04-01 2023-05 Person O'Malley, Joseph M joseph.omalley@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5741 Contact via email Point of Contact 1988-01-01 2018-12-31 Person Mundy, Bruce C bruce.mundy@noaa.gov 1845 Wasp Blvd. Honolulu HI 96818 USA (808)725-5374 Email with questions. Ground Condition 178 180 31 29 Hancock Seamounts Range 1984-07-09 1984-07-29 TC 84-05 Range 1985-02-04 1985-02-16 TC 85-01 Unclassified Send written request to PIFSC and get approval by the PIFSC data owner. None None None https://oceanwatch.pifsc.noaa.gov/xfer/PIFSC_PIRO_bulk_data_download_InPort_8792.tgz 2015 Organization Pacific Islands Fisheries Science Center https://ror.org/02apffz65 2019-01-30 Miyamoto, Brent M Miscoded species codes corrections made: 1) 6477 02 6477 to 6477 02 0523 - Euphausia gibboides - TC 85-01, station number 107, row number 47 2) 6477 02 0526 to 6477 02 0523 - Euphausia gibboides - TC 84-05, station number 106, row number 14 and TC 85-01, station number 108, row number 33 3) 8456 02 0400 to 8546 02 0400 - Scopelberyx sp. - TC 85-01, station number 108, row number 19 4) 6483 02 0806 to 6482 01 0806 - Gennedas propinquus - TC 85-01, station number 110, row number 21 5) 6483 02 0800 to 6482 01 0800 - Gennedas sp. - TC 85-01, station number 110, row number 22 6) 8531 23 1001 to 8531 32 1001 - Opostomias mistuii - TC 85-01, station number 132, row number 8 Oracle database QC review prior to data entry. Further QC after data entry. Yes Unknown Yes No 1 Year NCEI-MD 1 Year PIFSC ITS performs regular backups of shared drives. Data was collected in the field by PIFSC staff, and entered in table format into electronic spreadsheets. 55439 Entity 55388 Entity gov.noaa.nmfs.inport:8792 Brent Miyamoto 2009-01-05T14:43:50 SysAdmin InPortAdmin 2025-12-03T01:00:28 2025-02-13 Pacific Islands Fisheries Science Center PIFSC 1845 Wasp Blvd. Honolulu HI 96818 USA 808-725-5300 https://www.pifsc.noaa.gov 8:00 a.m. - 4:30 p.m. 1001 Public No No 2019-07-23 1 Year 2020-07-23