Full-Scale Demo of the Harvesting/Processing of Arrowtooth
Dr. Ming Wu, Dr. Jerry Babbit, Dr. Tyre Lanier
October 25, 1996 Revised December 3, 1996
National Marine Fisheries Service, Alaska Region, P.O.
Box 21668, Juneau, AK 99802-1668. PHONE: (907) 586-7255
of this project was to develop production levels of surimi
from Arrowtooth flounder, monitor changes in the quality
of the surimi over time, and test the acceptance of surimi
by firms that manufacture finished products from surimi.
Arrowtooth flounder can be harvested, processed
and transported to the consumer without softening, if
no temperature abuse occurs. However, it contains
endogenous protease(s) that cause the flesh, when not
cooked correctly, to turn into an unappetizing mush.
Researchers have developed several methods for dealing
with the protease problem including the removal of the
majority of the protease(s) by multiple water washes,
cooking processes that rapidly transit the narrow temperature
window of protease activity, and the use of protease(s)
inhibitors, etc. The goals of this project were to (1)
evaluate the traditional surimi processing system and
its usefulness in resolving the flesh softening enigma
found in Arrowtooth flounder; (2) to test the use of various
protease inhibitors in the manufacture of surimi in an
attempt to eliminate this problem; (3) to produce commercial
volumes of Arrowtooth flounder surimi; and, (4) to obtain
"user" evaluation of Arrowtooth flounder surimi
for use in the manufacturing of surimi-based analog products.
The researchers managed to manufacture a usable surimi
product from Arrowtooth flounder which was comparable
to Alaska pollack A grade. The approach and evaluation
of test batches suggested that both beef plasma protein
and a potato-derived inhibitor were moderately effective
and resulted in a surimi, from which was believed, crab
analogs could be manufactured. The project was successful
in uncovering and proving a method of surimi manufacture
and use that rendered inactive the endogenous protease(s)
contained in Arrowtooth flounder flesh.