Barramundi

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Barramundi
Barramundi (in foreground)
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Perciformes
Family: Latidae
Genus: Lates
Species: L. calcarifer
Binomial name
Lates calcarifer
(Bloch, 1790)
Not to be confused with the Barramundi Cod or the Australian members of the genus Scleropages (which sometimes are referred to as Barramundis).

The Barramundi (Lates calcarifer), also known as Asian Seabass, is a species of catadromous fish in family Latidae of order Perciformes. The native species is widely distributed in the Indo-West Pacific region from the Persian Gulf, through Southeast Asia to Papua New Guinea and Northern Australia. Known in Thai language as Pla Krapong (Thai: ปลากระพง), it is very popular in Thai cuisine.

Contents

[edit] Origin of name

Barramundi is a loanword from a Queenslander Australian language of the Rockhampton area[1] meaning "large-scaled river fish".[2] Originally, the name barramundi referred to saratoga and Gulf saratoga.[3] However, the name was appropriated for marketing reasons during the 1980s, a decision which has aided in raising the profile of this fish significantly.[3] L. calcarifer is broadly referred to as Asian seabass by the international scientific community, but is also known as giant perch, giant seaperch, Australian seabass, and by a variety of names in other local languages, such as Siakap in Malay.

[edit] Description

This species has an elongate body form with a large, slightly oblique mouth and an upper jaw extending behind the eye. the lower edge of the preoperculum is serrated with a strong spine at its angle; the operculum has a small spine and a serrated flap above the origin of the lateral line. Its scales are ctenoid. In cross section, the fish is compressed and the dorsal head profile clearly concave. The single dorsal and ventral fins have spines and soft rays; the paired pectoral and pelvic fins have soft rays only; and the caudal fin has soft rays and is truncate and rounded. Barramundi are a salt and freshwater sportfish, targeted by many. They have large silver scales, which may become darker or lighter, depending on their environment. Their bodies can reach up to 1.8 meters long, though evidence of them being caught at this size is scarce.

Barramundi are demersal inhabiting soiastal water, estuaries, lagoons and rives; they are found in clear to turbid water, usually within a temperature range of 26-30oC. This species does not undertake extensive migrations within or between river systems, which has presumably influenced establishment of genetically distinct stocks in Northern Australia.

Barramundi are mainly a summertime fish, but can be caught all year round, and may be found frolicking in mud. They are usually targeted using both hard and soft bodied lures.

[edit] Lifecycle

The barramundi feeds on crustaceans, molluscs, and smaller fishes (including its own species); juveniles feed on zooplankton. Barramundi are euryhaline, but stenothermal. This catadromous species inhabits rivers and descends to estuaries and tidal flats to spawn. In areas remote from freshwater purely marine populations may become established.

At the start of the monsoon males migrate downriver to meet females, which lay very large numbers of eggs (multiple millions each). The adults do not guard the eggs or the fry, which require brackish water to develop.

The species is sequentially hermaphroditic, most individuals maturing as males and becoming female after at least one spawning season; most of the larger specimens are therefore female. Fish held in captivity sometines demonstrate features atypical of fish in the wild: they change sex at a smaller size, exhibit a higher proportion of protogyny and some males do not undergo sexual inversion.[4]

[edit] Recreational fishing

Highly prized by anglers for their good fighting ability, barramundi are reputed to be good at avoiding fixed nets and best caught on lines and with fishing lures. In Australia, the barramundi is used to stock freshwater reservoirs for recreational fishing.

Impoundment barramundi, as many anglers recognize them, are growing in popularity as a catch and release fish. Popular stocked barramundi impoundments include Lake Tinaroo, near Cairns in the Atherton Tablelands, Peter Faust Dam near the Whitsundays, Teemburra Dam near Mackay, Lake Moondarra near Mount Isa, Lake Awoonga near Gladstone, and Lake Monduran around an hours drive south from Lake Awoonga.

Fishing techniques revolve mainly around casting and retrieving all types of lures including soft and hard body lures. Trolling is also a favored and productive technique for impoundment barramundi.

Impoundment barramundi are also a popular target with surface lures as they are known to eat all types of foods from the surface of the water including frogs, injured baitfish and even baby swans and other birds.

The distinct 'boof!' noise which barramundi make when surface feeding can easily be recognised and echo up to long distances at quiet times like still nights.

Many anglers travel to Queenslands barramundi impoundments to catch the elusive 'metrey', a barramundi measuring in excess of a metre and weighing anywhere from 10 kg - 25 kg, depending on the fat level.

When hooked on a lure, the barramundi will often clear itself from the water several times throughout the battle and make long powerful runs. This makes it a popular target species.

The eating quality of impoundment barramundi is quite low, with a rating of around 1.5/5 stars.

The flesh has a 'muddy' taste due to the barramundi spending all of its life in silty, freshwater environments, although there are recipes which claim to remove or mask the muddy taste.

[edit] Commercial fishing and aquaculture

The fish is of large commercial importance; it is fished internationally and raised in aquaculture in Australia, Malaysia, India, Indonesia, Thailand and the United States. The Australian barramundi industry is relatively established with an annual production of more than 4000 tons. In the broader Southeast Asian region production is estimated to exceed 30,000 tons. By contrast, the US industry produces about 800 tons a year from a single facility. Barramundi under culture will commonly grow from an ex-hatchery juvenile, between 50 and 100 mm in length to a table size of 400-600g within 12 months and to 3.0kgs within 18–24 months.[5]

[edit] Aquarium use

Smaller specimens are a popular aquarium fish and can be very entertaining especially at feeding time. However they grow quickly , so it is not recommended that they be kept in any set up of less than 5 feet ( 500 litres) In aquaria they become quite tame and can be hand fed, they are non aggressive species however the feeding reflex is violent and sudden so they can not be kept with any tank mates small enough to be swallowed.

[edit] As food

Barramundi piebald color morph

Barramundi have white, flaky flesh, though the larger freshwater ones commonly carry a lot of body fat. Saltwater barramundi, however, have a general reputation as good eating.

In Australia, Barramundi is an iconic table fish revered across the whole country. It could be said that it is a quintessential Australian brand. Its name is after all derived from its Australian Aboriginal name. However, such is the demand for the fish that a substantial amount of Barramundi consumed in Australia is actually imported. This has placed significant economic pressure on Australian producers, both fishers and farmers whose costs are significantly greater due to the stringant environmental and food safety standards placed on them by government. While Country of Origin Labelling has given consumers greater certainty over the origins of their Barramundi at the retail level, there is no requirement for the food service and restaurant trades to label the origins of their Barramundi. Therefore, diners who, due to the iconic nature of the fish would reasonably assume that they are eating Australian caught or grown Barramundi, are in fact probably eating an imported product. Furthermore, they are probably paying a premium price on this assumption.

Barramundi are a favourite food of the region's apex predator the Saltwater Crocodile (Crocodylus porosus), which have been known to take them from unwary fishermen.

Nile perch—a similar fish found in the Afrotropic Ecozone, or Sub-Saharan Africa—is often mislabeled as barramundi. It does not fall under the recommendation for U.S. farmed barramundi. The species was originally assigned to genus Holocentrus, in the beryciform family Holocentridae.

This fish is known as Pla Krapong in Thailand and [6] it is one of the most popular fishes in Thai cuisine. It is often eaten steamed with lime and garlic, as well as deep-fried or stir-fried with lemongrass, among a variety of many other ways. Pla Krapong can be seen in aquariums in many restaurants in Thailand, where sometimes this fish is wrongly labelled as "snapper" or "sea-bass" in menus.[7]

[edit] External links

[edit] References

  1. ^ http://www.kasei.ac.jp/library/kiyou/2001/13.YOKOSE.pdf
  2. ^ "Barramundi approval rating rise". Food & Beverage Industry. http://findarticles.com/p/articles/mi_m3190/is_/ai_100572900. Retrieved 2008-12-12. 
  3. ^ a b "Australia's Arrow Fish, Saratoga (The True Barramundi)". http://www.sweetwaterfishing.com.au/AustArrowFish.htm. Retrieved 2007-10-04. 
  4. ^ "FISHERIES MANAGEMENT PAPER No. 127". http://www.fish.wa.gov.au/docs/mp/mp127/fmp127.pdf. Retrieved 2009-08-11. 
  5. ^ "FISHERIES MANAGEMENT PAPER No.127". http://www.fish.wa.gov.au/docs/mp/mp127/fmp127.pdf. Retrieved 2009-08-11. 
  6. ^ Fishing in Thailand
  7. ^ Ruen Urai, Thai cuisine
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