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Assessing the Population-Level Impacts of North Pacific Loggerhead and Western Pacific Leatherback Turtle Interactions

May 28, 2020

This TM is intended to be read as part II of NOAA TM NMFS-PIFSC-95 and is an update to the methods to address partial observer coverage in the deep-set longline fisheries, as well as a presentation of new results. The two TMs should be read together.

This NOAA Technical Memorandum (TM) is intended to be read as part II of NOAA Technical Memorandum NMFS-PIFSC-95, February 2020, Assessing the Population-level Impacts of North Pacific Loggerhead and Western Pacific Leatherback Turtle Interactions in the Hawai'i-based Shallow-set Longline Fishery (Martin et al. 2020).

The overarching methods, marine turtle demographic data, and estimates on abundance and trends in this TM were used and developed for the Hawai'i-based shallow-set longline fishery.

Herein, we adapted the models to apply them to the Hawai'i-based and American Samoa-based deep-set longline fisheries (DSLL and ASLL fisheries, respectively).

This TM is largely an update to the methods to address partial observer coverage in the deep-set longline fisheries, as well as a presentation of new results. The two TMs should be read together and viewed in unison to understand the impacts of the shallow and deep- set longline fisheries in Hawai'i and American Samoa.


Martin S, Siders Z, Eguchi I, Langseth B, Yau A, Baker J, Ahrens R, Jones TT. 2020. Update to Assessing the Population-level Impacts of North Pacific Loggerhead and Western Pacific Leatherback Turtle Interactions, inclusion of the Hawai'i-based Deep-set and American Samoa-based Longline Fisheries. U.S. Dept. of Commerce, NOAA Technical Memorandum NOAA-TM-NMFS-PIFSC-101,  62 p. https://doi.org/10.25923/pnf2-2q77.

Last updated by Pacific Islands Fisheries Science Center on 09/29/2025

Leatherback Turtle Sea Turtles