gov.noaa.nmfs.inport:8792 eng UTF8 dataset Oracle Database Pacific Islands Fisheries Science Center 808-725-5300 1845 Wasp Blvd. Honolulu HI 96818 USA https://www.pifsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 8:00 a.m. - 4:30 p.m. resourceProvider 2025-12-03T01:00:28 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Larval Fish Identification from Cruises at the Hancock Seamounts, TC-84-05 and TC-85-01 1992-05-05 publication NOAA/NMFS/EDM 8792 https://www.fisheries.noaa.gov/inport/item/8792 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information tableDigital 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. completed Schemmel, Eva M eva.schemmel@noaa.gov Contact via email. pointOfContact notPlanned FRMD LHP PIFSC Townsend Cromwell distribution eez ichthyoplankton plankton seamount tucker trawl theme Hancock Seamounts place DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Archival project InPort 2019-01-30T00:00:00 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 Miyamoto, Brent M user otherRestrictions Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Larval Fish Identification from Cruises at the Hancock Seamounts, TC-84-05 and TC-85-01 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/8792. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: None unclassified NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 8792 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/8792.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US oceans Oracle database 178 180 29 31 Hancock Seamounts TC 84-05 | Currentness: Ground Condition 1984-07-09 1984-07-29 TC 85-01 | Currentness: Ground Condition 1985-02-04 1985-02-16 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 false eng false Spreadsheet Data Table RB006AA2_V_SPECIES_CODE 2025-02-13 publication RB006AA2_V 2025-02-13 publication Pacific Islands Fisheries Science Center 808-725-5360 1845 Wasp Blvd. Honolulu HI 96818 USA pifsc.info@noaa.gov https://www.pifsc.noaa.gov WWW:LINK-1.0-http--link Pacific Islands Fisheries Science Center Website Pacific Island Fisheries Science Center homepage information 8:00 a.m. - 4:30 p.m. distributor https://oceanwatch.pifsc.noaa.gov/xfer/PIFSC_PIRO_bulk_data_download_InPort_8792.tgz WWW:LINK-1.0-http--link https://oceanwatch.pifsc.noaa.gov/xfer/PIFSC_PIRO_bulk_data_download_InPort_8792.tgz download dataset Data was collected in the field by PIFSC staff, and entered in table format into electronic spreadsheets. otherRestrictions otherRestrictions Access Constraints: None | Use Constraints: None