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This dataset corresponds to the size-frequency (SF) data for sailfish (Istiophorus platypterus), classified by fishing fleet, year, gear, type of school, time interval (usually monthly), spatial stratum (typically CWP square grids of 5°×5°), and fork length class. The size data may originate from samples or have been raised to represent the total catch.
Size measurements have been consolidated following the processing steps described in IOTC-2020-WPDCS16-16. The conversion factors and morphometric relationships available to convert all size measurements to fork lengths are available in Table 1.
Code | Species | Source Length type | a | b | Allometric relationship | Min length | Max length | Reference |
|---|---|---|---|---|---|---|---|---|
SFA | Sailfish | EF | 6.9010e-05 | 2.52429 | RD = a*EF^b | 86 | 188 | Uchiyama and Kazama (2003)* |
SFA | Sailfish | EF | 8.8450e-01 | -3.70250 | LJ = a*EF+b | 78 | 232 | Chiang et al. (2004)* |
Chiang, W.-C., Sun, C.-L., Yeh, S.-Z., Su, W.-C., 2004. Age and growth of sailfish (Istiophorus platypterus) in waters off eastern Taiwan. Fishery Bulletin 102, 251–263.
Uchiyama, J.H., Kazama, T.K., 2003. Updated weight-on-length relationships for pelagic fishes caught in the central north Pacific Ocean and bottomfishes from the northwestern Hawaiian islands (Administrative Report No. H-03-01). Pacific Islands Fisheries Science Center, NMFS, NOAA, Honolulu, Hawaii, USA. https://repository.library.noaa.gov/view/noaa/4789
The data originate from the IOTC Contracting Parties and Cooperating Non-Contracting Parties (CPCs) as per the IOTC data requirements (Resolution 15/02). They are submitted annually, mostly using IOTC Form 4SF, and curated by the Secretariat for dissemination prior to IOTC Working Parties and other scientific data users.
