Catch of Non-Target Fish Species and Sea Turtles: Comparing Hawaii's
Pelagic Longline Fishery Against Others
Reports (PDF): FY
2008, FY 2007,
report, FY 2006,
FY 2004, FY
The overall objective of the proposed project is to test whether a methodology
patterned after work done by fisheries scientist M. A. Hall(1) for quantifying
dolphin by-catch in the eastern Pacific purse seine tuna fishery can
be adapted to Hawaii and other pelagic longline fisheries. The project
team will analyze and present the by-catch impacts of the Hawaii pelagic
longline fisheries for tuna and swordfish in a way that expresses by-catch
as a function of the catch of primary target species. BPUE, or by-catch
per unit effort, can be expressed in relationship to a unit of fishing
effort or alternatively, per ton of primary target species caught and
retained (Hall). The objective is to put the by-catch associated with
the Hawaii pelagic longline fishery into perspective by using a comparable
standard of ecological impacts to make comparisons with other fisheries
for the same target species available in the U.S. seafood market.
catch impacts will also be calculated and presented in a similar fashion
where mortalities (waste) of released fish are uncertain. Sea turtle
takes (incidental catch) will also be calculated and presented as a
ratio of the number of interactions per ton of primary target species
retained. Finally, an estimate of the sea turtle mortalities will be
calculated per ton of primary target species as a means of putting these
impacts into perspective with other fisheries supplying the U.S. market
with identical species of pelagic fish.
the best available estimates of the targeted and non-targeted fish
retained and discarded by the Hawaii pelagic longline fishery.
the best available estimates of sea turtle interactions associated
with Hawaii pelagic longline fishery.
the approach to calculating and standardizing the incidental catch
and by-catch impact indices characterizing the catch of target species
in the Hawaii pelagic longline fishery.
a matrix of the selected incidental catch and by-catch impact indices
for the Hawaii pelagic longline fishery that can be used to compare
the impacts of various fisheries management scenarios and compare
to obtain fisheries data from a select group of distant pelagic longline
fisheries needed to generate estimates of incidental catch and by-catch
impact indices for comparison with Hawaii's pelagic longline fishery.
a draft document comparing Hawaii's multi-species pelagic fishery
with other pelagic fisheries that tend to retain only target species
(tuna, swordfish) and may also impact sea turtles.
Hall, M.A., 1999. Estimating the ecological impacts of fisheries:
What data are needed to estimate bycatches? FAO International Conference
on Integrated Fisheries Monitoring, Sydney, Australia, February 1-5,
1999. pp. 175-184.
funding for this project awarded in June 2002
Pacific Management Resources, Inc.
3615 Harding Ave., #408-409
Honolulu, Hawaii 96816 USA
Phone (808) 735-2602
FAX (808) 7354-2315
Akala Products, Inc.
965-F North Nimitz Hwy
Honolulu, Hawaii 96817 USA
Phone/FAX (808) 531-5866