Barramundi
The Barramundi is one of Australia's most well
known freshwater species. It is prized by recreational anglers because
it is a strong fighter, grows to a large size (60kg) and is an excellent
table fish. It is also the most important freshwater commercial
fish in Australia. The 14kg (33lb) Barramundi in
the image was caught in March 1993 by G. Parkinson in the Victoria
River, near Timber Creek, Northern Territory.
The Barramundi is recognised by its pointed head,
concave forehead, large jaw extending behind the eye and rounded
caudal fin. It has a first dorsal fin with seven or eight strong
spines and a second soft-rayed dorsal fin of ten or eleven rays.
Adult Barramundi are blue to green-grey dorsally,
silvery on the sides, and white below. Juveniles are mottled brown
with a distinct white stripe from the dorsal fin to the snout.
This species has been recorded from the Persian Gulf to China and
south through Asia to Australia. In Australia it occurs from the
Kimberley and Pilbara regions of Western Australia and around the
north of the country to the Mary and Maroochy River systems in southern
Queensland. It lives in a range of conditions in creeks, rivers
and estuaries in clear to turbid waters.
Male and Female Barramundi's
Male and female Barramundi migrate into estuaries
to breed, and then return to their original river systems. Males over
five years of age usually go through a sex transformation to become
female.
The Barramundi eats a range of foods including
fishes, shrimps, crayfish, crabs and aquatic insects.
Barramundi Description
Barramundi are large predators, growing up to 60kg, but usually
being caught at around 5-6kg. They can grow up to around 180cm, but
are sexually mature at about 99cm. Belonging to the giant perch family,
barramundi are similar in general appearance to freshwater
perches and freshwater grunters.
Barramundi are among the largest and most important
commercial fishes, as well as being one of Queensland’s most
sought-after sport fish. Barramundi provide spectacular angling,
often leaping clear of the water to avoid capture. They are also
capable of forcing their way through nets using the razor-sharp
edges of their gill covers.
They are greenish-bronze along the back, silver along the sides,
shading to white on their bellies. Juveniles have creamy and dark
blotches, and may have yellowish pelvic and tail fins. Most barramundi
begin their lives as males and change to females as they become
much larger.
Barramundi habitat/distribution
Barramundi are warm water fish, being found in tropical coastal
and freshwaters in northern Australia. Ranging from the Ashburton
River in Western Australia to the Noosa River in Queensland, they
move between freshwater and saltwater, during various
stages of their lifecycle. Barramundi are found in estuaries and coastal
waters during their breeding season. Larger fish are found in tidal
waters where they feed on large banana prawns and surface fish such
as garfish.
They can be found at depths of around 40m.
The barramundi (Lates calcarifer) is a large predatory fish found
in tropical regions of Australia and throughout the Indo-West Pacific.
In Australia, its natural distribution extends from the Ashburton
River in Western Australia, throughout the Northern Territory, to
the Maryborough River in Queensland.
Barramundi Farming Production
Barramundi aquaculture commenced in Queensland with a hatchery operation
initiated by Sea Hatcheries at Mourilyan in north Queensland in
1982 then spread to farm pond operations with fish grown in floating
cages within freshwater earthen ponds (Ruello and Associates 2001).
Although the bulk of the production still comes from northern Queensland,
barramundi is now farmed in all mainland states.
The industry can be broadly divided into three categories of farming:
cage culture in purpose built freshwater ponds (including free range
fish in ponds), sea cage culture in offshore or estuarine waters,
and intensive production in indoor facilities.
Pond culture is the most common and currently accounts for the
majority of barramundi production in north Queensland. However,
in southeast Queensland and the southern states, intensive farming
operations using indoor recirculation systems are used.
In the Northern Territory, of the two larger farms,
one is located onshore and uses earthen ponds and free range fish,
while the other, more recently established farm is a marine operation
using offshore sea cages. Western Australia’s largest farm,
at Lake Argyle, uses freshwater cage culture while the few producers
operating in the south of the state use recirculation systems.
The opportunity to establish pond and sea operations is confined
to tropical regions, whereas the more intensive, indoor facilities
can be established in any climate.
In 2001-02 Queensland produced 840 tones (whole fish equivalent)
of farmed barramundi.
In 2000-01, the 23 producing farms using pond based systems accounted
for 97 per cent of state production, while the five producing farms
using recirculation systems accounted for 3 per cent. Total ponded
area was 176 hectares. The actual number of ponds stocked was 181,
covering 86 hectares.
Barramundi Prices
In 2001-02 the farm gate price per fish (whole fish basis) is estimated
to have averaged $7.95 a kilogram, giving the Queensland farmed
barramundi industry an estimated gross value of production of $6.7
million in 2001-02.
As the barramundi is a tropical fish not native
to New South Wales, juveniles for New South Wales barramundi farms
are obtained from hatcheries in Queensland and the Northern Territory.
The colder climate and the potential power costs involved with tank
culture (all New South Wales farms use recirculation tank systems)
had until recently restricted the development of the New South Wales
industry. The barramundi is also known to be a
potential carrier of the barramundi encephalitis virus (BEV) which
has the potential to affect a number of species native to New South
Wales. As a result, NSW Fisheries has imposed tight restrictions
on the culture of barramundi.
There were five (or less) licensed barramundi farms in New South
Wales in 2001-02. Production was 54.9 tones valued $588 700 at the
farm gate (NSW Fisheries 2003). Farmed barramundi production in
New South Wales is expected to continue to expand given recent expansion
of some farms and the implementation of nursery technology.
South Australia produced 255 tones of farmed barramundi
valued at $2.65 million in 2001-02.
Farming commenced in South Australia in the early 1990s, with several
farms being established in the Adelaide Hills. Barramundi are now
farmed in a variety of locations across the south of the state,
including the South East and the Eyre Peninsula. As in New South
Wales, the majority of barramundi farms use fully enclosed recirculation
systems to maintain and control critical water temperature conditions.
One farm operator uses a flow through system of warm artesian bore
water. Currently there are around twenty registered barramundi growers
in South Australia, including commercial producers as well as training
facilities such as schools.
In Western Australia most production comes from the Lake Argyle
operation, although, as previously noted, there are also several
farms in the south of the state that produce barramundi using recirculation
systems. Trials have also been conducted farming barramundi in artesian
water in the Gascoyne Region (Department of Fisheries 1999). In
2001-02, Western Australia produced 38 tones of barramundi (valued
at $420 000), slightly down on tonnage in 2000-01.
However, in the first half of 2002-03, production has increased
very rapidly.
Commercialising Barramundi Fishing
In the Northern Territory most of the barramundi commercially produced
onshore is from one farm, which had sales of 36 tones in 2000-01
and 62 tones in 2001-02.
There are also two small enterprises catering to the fish-out tourist
trade.
A large sea farming operation that applies salmon farming technology
to the farming of Barramundi is now being developed by Marine Harvest
at Port Hird in the Tiwi Islands. Stage one of the project, lasting
two to three years, is planned to produce up to 1000 tones of barramundi
a year.
In Victoria, barramundi production has commenced
in recent years under strict biosecure conditions in intensive recirculation
systems (NRE 2002). There are only a few licenses at present. Production
is small and all sales are being made locally.
Aggregating published and estimated production in Queensland, South
Australia, New South Wales, Western Australia and Northern Territory
in 2001-02,
Australian barramundi production was around 1250
tones in 2001-02.
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