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Larval Fish Identification from Cruises at Oahu, TC-85-04, TC-85-05, TC-86-02, TC-86-04

Metadata Updated: October 28, 2022

Four cruises aboard the NOAA ship Townsend Cromwell were conducted, collectors included George Boehlert and Bruce Mundy. Two transects, oriented in an east-west direction, were established, one each on the leeward and the windward sides of the island. Stations were located 1.8, 9.3, and 27.8 km from shore along the leeward side and 3.7, 9.3, and 27.8 km from shore along the windward side. Larvae were sampled below the surface with a 1 m2 multiple opening-closing net and environmental sensing system (MOCNESS) and at the sea surface with a 0.49 m2 Manta net modified to take surface samples to a depth of 0.7 m. All nets were constructed of 0.333 mm Nitex mesh. Estimates of water volumes filtered by both gear types were based on mechanical flowmeter readings. Samples were taken in eight depth strata (neuston, 0-10, 10-20, 20-30, 30-40, 40-50, 50-60, and 60-80 m) at each nearshore station and in nine depth strata (neuston, 0-20, 20-40, 40-60, 60-80, 80-100, 100-120, 120-160, and 160-200 m) at the 4 offshore stations. MOCNESS hauls were 12 minutes duration for each net (stratum), fished in a stepped oblique fashion from deep to shallow with mean tow speeds of approximately 75 cm/sec; the tow speed was adjusted to maintain a net mouth angle near 45". Neuston tows were 24 minutes, taken during the mid-point of the MOCNESS tows. Replicate tows were taken at each station in both day and night, but only the first replicate sample was sorted for the December, April, and June cruises, whereas both replicates were processed for the September cruise.

All fish larvae were identified to the lowest taxonomic level possible by Bruce C. Mundy. Squid paralarvae were transferred to the Dr. Richard Young (Dept. of Oceanography, Univ. of Hawai'i). Other taxa were not routinely sorted, but heteropods from selected samples have been transferred to Dr. Roger Seapy (Dept. of Biological Sciences, California State Univ. Fullerton; see Seapy 1990. Patterns of vertical distribution in epipelagic heteropod molluscs off Hawaii. Mar. Eco1.-Prog. Ser., 60: 235-246.) and numbers of four species of copepods were obtained from subsamples from certain stations by Dr. R. Patrick Hassett (Dept. of Zoology, Arizona State Univ.; see Hassett and Boehlert 1995. Seasonal, vertical and horizontal distributions of four species of copepods around Oahu, Hawaii: data report. NOAA Tech. Memo. NMFS, NOAA-TM-NMFS-SWFSC-215, 21 p.).

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date October 20, 2022
Metadata Created Date November 12, 2020
Metadata Updated Date October 28, 2022
Reference Date(s) (publication)
Frequency Of Update notPlanned

Metadata Source

Harvested from NMFS PIFSC

Additional Metadata

Resource Type Dataset
Metadata Date October 20, 2022
Metadata Created Date November 12, 2020
Metadata Updated Date October 28, 2022
Reference Date(s) (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:8791
Access Constraints Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Larval Fish Identification from Cruises at Oahu, TC-85-04, TC-85-05, TC-86-02, TC-86-04 [Data Date Range],, Access Constraints: None |
Bbox East Long -157
Bbox North Lat 22
Bbox South Lat 21
Bbox West Long -159
Coupled Resource
Frequency Of Update notPlanned
Harvest Object Id 6dcdbdd6-8207-4038-a33b-7de88c4a3ee0
Harvest Source Id c0beac72-5f43-4455-8c33-1b345fbc2dfe
Harvest Source Title NMFS PIFSC
Licence 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.
Lineage Data was collected in the field by PIFSC staff, and entered in table format into electronic spreadsheets.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-159.0, 21.0], [-157.0, 21.0], [-157.0, 22.0], [-159.0, 22.0], [-159.0, 21.0]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True
Temporal Extent Begin 1985-09-06
Temporal Extent End 1986-07-02

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