 |
 I. Biological Description Tombo ahi (Thunnus alalunga) is commonly known as albacore tuna. Other
names for this species include Pacific albacore, tombo, and "white meat"
tuna. The tombo ahi caught in the vicinity of the Hawaiian Islands are
large (over 40 pounds in round weight) adult fish. Smaller, immature
tombo migrate extensively throughout the North Pacific far north of
the Hawaiian Islands.
Fishing Methods: Most of the tombo ahi catch in Hawaii is landed by commercial longline boats which set hooks at the swimming depths of the large tombo (75-150 fathoms). A small portion of the catch is made by the small-boat handline (ika-shibi) fishery based on the island of Hawaii. Distribution: The longline catch and much of the handline (ika-shibi) catch of tombo ahi is marketed through the Honolulu fish auction. The remainder of the handline catch is sold through the fish auction in Hilo and through intermediary buyers on that island. Most of the albacore caught in Hawaiian waters consist of mature fish, 40 to 80 pounds in round weight. Most of this fish is sold fresh, but surpluses caught during the peak summer season are sometimes smoked. Substitution: Despite having a pinkish rather than reddish flesh, tombo
ahi occasionally substitutes for other species of ahi or for aku in
raw fish preparations. It is completely interchangeable with other ahi
or a`u species in broiled or sauted forms, although it may be more susceptible
to overcooking than the other species. Tombo is also interchangeable
with other tuna and marlin (a`u) for dried and smoked products.
Product Forms And Yields: The preferred market size of tombo ahi for use in fresh or processed products is greater than 50 pounds in the round. The larger fishes have several advantages: (1) greater yield of finished product -- 60-65%, (see Table 5); (2) pinker flesh coloration; and, (3) greater fat content than smaller tombo. Fresh albacore is also marketed as loins, loin sections, or steaks
at fish markets or supermarkets with fish counter service or self-service
counters. Tombo is one of the preferred species for gourmet smoked fish
products. Color, Taste, Texture: Tombo ahi has flesh that varies from whitish-pink in smaller fish to deep pink in larger fish. Larger tombo ahi have a greater fat content than smaller fish, and this is a desirable attribute for raw fish products, as well as for broiling. As raw fish, tombo is softer than other ahi or aku and, hence, more difficult to slice into sashimi. The flesh becomes much firmer when cooked than when in the raw state. Preparations: Restaurants usually grill tombo ahi, but other cooking
methods will work as well. Tombo has a tendency to dry out quickly,
so it is important to avoid overcooking. Albacore is the only tuna species which can be canned as "white meat"
in the U.S. The west coast albacore fishery began in the early 20th
century as canning techniques were perfected. However, it was twenty
years before albacore became recognized as a premium canned product.
With recent cannery closures on the U.S. west coast and wide fluctuations
in cannery prices for tombo ahi, an increasing quantity is entering
the fresh and fresh frozen restaurant market.
SEND E-MAIL TO: seafood@dbedt.hawaii.gov ALL PHOTOS - COPYRIGHT 1995 BY CAMERA HAWAII, INC. FOR
THE STATE OF HAWAII
|
Availability And Seasonality: Commercial landings of tombo ahi have
increased in Hawaii. Tombo ahi is seasonally available in significant
quantities, but is scarce in the off-season. The peak in landings usually
occurs from May through September. There are also wide fluctuations
in the annual catch of tombo ahi. Availability is greatly influenced
by oceanographic conditions. Tombo ahi is believed to migrate along
ocean temperature "edges" rich in food, hence, disruption of ocean-wide
current systems, such as brought about by "El Nino" weather, may affect
catch rates in Hawaii.
Shelf Life
And Quality Control: Some longline boats which catch tombo ahi are at
sea for up to 10-12 days, but with proper care, the fish will retain
a high quality for three weeks after capture 
