- Southern bluefin tuna
name = Southern bluefin tuna
status = CR
status_system = iucn2.3
phylum = Chordata
genus = "
species = "T. maccoyii"
binomial = "Thunnus maccoyii"
binomial_authority = (Castelnau, 1872)The southern bluefin tuna, "Thunnus maccoyii", is a
tunaof the family Scombridaefound in open southern hemispherewaters of all the worlds oceans mainly between 30°S and 50°S, to nearly 60°S. At up to 2.5 m (8.2 ft) and weighing up to 400 kg (882 lbs) it is one of the largest bony fishes.
The southern bluefin tuna is a large streamlined fast swimming fish with a long slender
caudal peduncleand relatively short dorsal, pectoral and anal fins. The body is completely covered in small scales.
The body colour is blue-black on the back and silver-white on the flanks and belly, with bright yellow
caudal keels in adult specimens. The first dorsal fin colour is grey with a yellow tinge, the second dorsal is red-brown, and the finlets are yellow with a darker border.
The southern bluefin tuna is an opportunistic feeder, preying on a wide variety of fishes,
crustaceans, cephalopods, salps, and other marine animals.
Catch and management
The southern bluefin tuna is classified as Critically Endangered on the IUCN Red List of Threatened Species. [ [http://www.world-wire.com/news/0909040001.html Humane Society International: Southern Bluefin Tuna ] ] Since the 1950s, when industrial fishing commenced, the total population of southern bluefin tuna has declined by about 92 percent. [cite news| title = Japan's Sacred Bluefin, Loved Too Much | date = 2007-11-11 | publisher=Washington Post]
In 1994 the then existing voluntary management arrangement between
Australia, Japanand New Zealandwas formalised when the Convention for the Conservation of Southern Bluefin Tuna came into force. The Convention created the Commission for the Conservation of Southern Bluefin Tuna (CCSBT). Its objective is to ensure, through appropriate management, the conservation and optimum utilisation of the global southern bluefin tuna fishery. Later, South Korea, Taiwan and the Philippines have joined, or are cooperating with, the Commission. The CCSBT is headquartered in Canberra, Australia.
At the annual meeting of the Commission in October 2006, which also included representatives from the
European Union, it was agreed to cut the global catch by more than 20%, with Japan halving its quota. Prior to this meeting, Japan was accused by Australia of overfishingits quota by 2-3 times every year during the last 20 years [http://www.theage.com.au/news/national/japanese-accused-of-2bn-tuna-fraud/2006/08/11/1154803098670.html] Japan disputes this figure, but acknowledges that some overfishing has occurred in the past. [http://www.iht.com/articles/ap/2006/10/16/asia/AS_GEN_Japan_Tuna_Fishing.php]
* Tony Ayling & Geoffrey Cox, "Collins Guide to the Sea Fishes of New Zealand", (William Collins Publishers Ltd, Auckland, New Zealand
1982) ISBN 0-00-216987-8
*Clover, Charles. 2004. "The End of the Line: How overfishing is changing the world and what we eat". Ebury Press, London. ISBN 0-09-189780-7
* [http://www.marine.csiro.au/LeafletsFolder/31sbt/31sbt.html Southern Bluefin Tuna at CSIRO]
* [http://marinebio.org/species.asp?id=238 Southern Bluefin Tuna at MarineBio.org]
* [http://www.ccsbt.org/ Official homepage of the Commission for the Conservation of Southern Bluefin Tuna]
Wikimedia Foundation. 2010.
Look at other dictionaries:
Bluefin tuna — may mean any of several species of tuna:* Northern bluefin tuna Thunnus thynnus * Southern bluefin tuna Thunnus maccoyii * Pacific bluefin tuna Thunnus orientalis … Wikipedia
bluefin tuna — noun Any of three related species of tunafish, the northern bluefin tuna, southern bluefin tuna, and Pacific bluefin tuna … Wiktionary
bluefin tuna — /blufɪn ˈtjunə/ (say bloohfin tyoohnuh) noun (plural bluefin tuna or bluefin tunas) 1. either of two species of tuna occurring off the east coast of Australia. The southern species, Thunnus maccoyii, is an important commercial fish. 2. a very… … Australian English dictionary
Northern bluefin tuna — Conservation status Critically Endangered ( … Wikipedia
Tuna — Tuna, are several species of ocean dwelling fish in the family Scombridae, mostly in the genus Thunnus . Tunas are fast swimmers they have been clocked at 70 km/h (45 mph) and include several species that are warm blooded. Unlike most fish… … Wikipedia
tuna — tuna1 /tooh neuh, tyooh /, n., pl. (esp. collectively) tuna, (esp. referring to two or more kinds or species) tunas. 1. any of several large food and game fishes of the family Scombridae, inhabiting temperate and tropical seas. Cf. albacore,… … Universalium
Pelagic fish — A school of large pelagic predator fish (giant trevally) sizing up a school of small pelagic prey fish (anchovies) Pelagic fish live near the surface or in the water column of coastal, ocean and lake waters, but not on the bottom of the sea or… … Wikipedia
Moritaka Hayashi — Dr. Moritaka Hayashi is an international lawyer, scholar and author, who is widely considered a leading expert on the impact of human activity on the world s oceans. Over a period of nearly 40 years, he has published extensively on issues… … Wikipedia
Thunnus — Taxobox name = Tuna fossil range = Middle Eocene to Present [cite journal last = Sepkoski first = Jack authorlink = coauthors = title = A compendium of fossil marine animal genera journal = Bulletins of American Paleontology volume = 364 issue =… … Wikipedia
Diversity of fish — Fish come in many shapes and sizes. This is a sea dragon, a close relative of the seahorse. They are camouflaged to look like floating seaweed. … Wikipedia