The bluefish, Pomatomus saltatrix,
is a migratory, pelagic species found throughout the world in
most temperate coastal regions, except the eastern Pacific.
Bluefish may reach ages of 12 years and sizes in excess of 100
cm (39 in.) and 14 kg (31 lb) (Collette and Klein-MacPhee 2002).
Along the U.S. Atlantic coast, bluefish are found from Maine
to Florida and mix extensively during seasonal coastal migrations
25.1). During winter, large bluefish tend to remain in the
Middle Atlantic Bight, moving south to North Carolina by March.
Small fish move farther south in winter with some fish wintering
off the coast of Florida. As water temperatures increase, the
spring migration north begins and spawning occurs in the South
Atlantic Bight at this time. By summer, bluefish move north
into the Middle Atlantic Bight, although some medium size fish
may remain off Florida (Shepherd et al. 2006). A second spawning
occurs in the offshore waters of the Middle Atlantic Bight during
The result of these two spawning events is
the appearance of two distinct size groups of juvenile bluefish
during autumn; a spring spawned cohort having fish about 15-25
cm in length and a summer spawned cohort having fish about 4-14
cm in length (Able and Fahay 1998). Fish from the two spawning
cohorts mix extensively during the year and constitute a single
genetic stock (Graves et al. 1992). Bluefish are voracious predators,
feeding primarily on squid and fish, particularly menhaden and
smaller fish such as silversides (Buckel et al. 1999, Fahay
et al. 1999).
Bluefish are managed under a joint management
plan collaboratively developed by the Mid-Atlantic Fishery Management
Council and the Atlantic States Marine Fisheries Commission
and implemented in 1990. The management measures presently include
an overall annual landingsquota in which 17% of the quota is
allocated to the commercial fishery and 83% is allocated to
the recreational fishery. The total commercial quota is divided
into state specific quotas, and there may be a transfer of a
portion of the recreational quota to the commercial sector if
predicted recreational landings are below the annual allocation.
Most of the recreational catch
of bluefish is taken in the Middle Atlantic states (New York to
Virginia). Historically, the recreational fishery has accounted
for 80 to 90% of the total catch, and recreational landings peaked
in 1981 and 1985 at over 43,000 mt (Figure
25.2 Data]). Recreational landings have averaged over 19 thousand
mt since 1982, but have been under 8,000 mt since 1995, and were
6,900 mt in both 2004 and 2005. Total numbers of bluefish caught
and released in the recreational fishery has increased steadily
since 1981. During 1981-1983, fishermen released an average of 18%
of the bluefish caught, whereas during 2002-2004 63% of the bluefish
caught were released. The commercial fishery for bluefish operates
primarily in the Middle and South Atlantic regions. Gillnets are
the principal gear used and account for approximately 40% of landings.
Other gear used include hook and line, pound nets, seines, and trawls.
Commercial landings ranged from 1,000 to 2,000 mt during the 1950s
and 1960s,increased during the 1970s and 1980s, peaking at 7,466
mt in 1981, and then declined throughout the 1990s reaching a low
of 3,300 mt in 1999 (Figure
25.2 Data]). Landings in 2005 were 3,500 mt (Table
NEFSC autumn survey abundance indices for bluefish in the Middle
Atlantic exhibit wide variation due to the appearance of large cohorts
entering coastal waters (Figure
25.3 Data])(Shepherd and Packer 2006, NEFSC
2005). The majority of bluefish caught in the fall are age-0 or
age-1. The two annual cohorts of age 0 bluefish can be partitioned
into separate indices based on size (Figure
25.4 Data]). Large year classes for both the spring and summer
spawned cohorts occurred in 1981,1984 and 1989. There has not been
a significant spring spawned cohort since 1989; however the summer
cohort in 2003 was very large. It has been hypothesized that the
success of the spring cohorts is critical to maintaining stock abundance
(Munch and Conover 2000).
Average fishing mortality peaked
at 0.46 in 1987 and has since steadily declined to 0.15 in 2004
25.5 Data]). Stock abundance declined steadily between 1983
and 1993 from 175.6 million fish in1982 to 58.4 million in 1993
where it remained stable for the next five years (Figure
25.5 Data]). Since 1998, abundance has slowly increased, reaching
105.4 million in 2003 but declined to 92.3 million in 2004. Biomass
peaked in 1982 at 229,000 mt, declined to 64,700 mt in 1997 and
have since increased to 104,100 mt in 2004 (Figure
25.6 Data]). The bluefish assessment was reviewed by a Stock
Assessment Review Committee in June 2005 and the review concluded
that the assessment results were uncertain and should be used
with caution (NEFSC 2005).
The Bluefish fishery management
plan was implemented in 1990 to halt the decline of the stock
and restore the population to sustainable levels. The stock has
been increasing but is still below the target biomass. Since the
2004 estimate of fishing mortality was 0.15, the stock was not
experiencing overfishing (Figure
25.5 Data]). Biomass below ½ Bmsy (i.e.
below 73,526 mt) defines an overfished stock under the current
management plan. Since biomass in 2004 was estimated as 104,136
mt, the stock was not in an overfished condition (Figure
25.6 Data]) (NEFSC 2005). Cycles of low and high abundance
of bluefish follow a pattern that seems to be the converse of
striped bass, another popular target of recreational fishermen.
Several recent studies have examined potential causes of this
pattern and have found no biological explanations (Buckel and
McKown 2002.). Ongoing research continues on bluefish population
dynamics and recruitment patterns along the Atlantic coast.
Able, K.W., and M.P. Fahay. 1998.
The First Year in the Life of Estuarine Fishes in the Middle Atlantic
Bight. Rutgers University Press. New Brunswick, NJ.
Buckel, J.A., M.J. Fogarty, and
D.O. Conover. 1999. Foraging habits of bluefish, Pomatomus saltatrix,
on the U.S. east coast continental shelf. Fish. Bull. 97:758-775.
Buckel, J.A., and K.A. McKown. 2002.
Competition between juvenile striped bass and bluefish: resource
partitioning and growth rate. Mar. Ecol. Prog. Ser. 234:191-204.
Collette, B.B., and G. Klein-MacPhee
(ed.). 2002. Bigelow and Schroeder’s Fishes of the Gulf of
Maine. 3rd edition. Smithsonian Inst. Press. Washington, D.C. 748
Fahay, M.P., P.L. Berrien, D.L.
Johnson, and W.W. Morse. 1999. Essential Fish Habitat Source Document:
Bluefish, Pomatomus saltatrix, Life History and Habitat
Characteristics. NOAA Technical Memorandum, NMFS-NE-144, 78 p.
Graves, J.E., J.R. McDowell, A.M.
Beardsley, and D.R. Scoles. 1992. Stock structure of the bluefish
Pomatomus saltatrix along the Mid-Atlantic coast. Fishery
Bulletin 90: 703-710.
Munch, S.B., and D.O. Conover. 2000.
Recruitment dynamics of bluefish (Pomatomus saltatrix)
from Cape Hatteras to Cape Cod, 1973-1995. ICES J. Mar. Sci. 57(2):