Monday, 23 April 2012

Almaco jack/Highfin jack

 
Name
Almaco jack (Seriola rivoliana) is a game fish of the family Carangidae, also known as Highfin Jack. They are in the same family as yellowtail and amberjack.

Location
Admiralty Is, Amer Samoa, Andaman Is, Anguilla, Antigua Barb, Argentina, Aruba, Australia, Azores Is, Bahamas, Bangladesh, Barbados, Belize, Bermuda, Br Virgin Is, Brazil, Cambodia, Caroline I., Cayman Is, Chagos Is, China Main, Colombia, Cook Is, Costa Rica, Cuba, Curaçao I., Djibouti, Dominica, Dominican Rp, Ecuador, El Salvador, Fiji, Fr Guiana, Galapagos Is, Greece, Grenada, Guadeloupe, Guam, Guatemala, Guyana, Haiti, Hawaii, Honduras, India, Indonesia, Iran, Italy, Jamaica, Japan, Kenya, Kermadec Is, Kiribati, Korea Rep, Lord Howe I., Madeira Is, Malaysia, Maldives, Marquesas Is, Marshall Is, Martinique, Mauritius, Mexico, Micronesia, Montserrat, Mozambique, Myanmar, N Marianas, New Caledonia, New Zealand, Nicaragua, Norfolk I., Ogasawara Is, Oman, Palau, Panama, Papua N Guin, Peru, Philippines, Portugal, Puerto Rico, Reunion, Ryukyu Is, Saint Lucia, Samoa, Singapore, Solomon Is, Somalia, South Africa, Spain, Sri Lanka, St Kitts Nev, St Vincent, Suriname, Tahiti, Taiwan, Tanzania, Thailand, Tokelau, Tonga, Trindade Island, Trinidad Tob, Tuvalu, Uruguay, US Virgin Is, USA, Vanuatu, Venezuela, Viet Nam, Wake I., Wallis Fut I.

Habitat
The Almaco jack is a pelagic species that can be found in small groups on slopes and off of reefs at depths from 5 to 160 metres (2.7 to 87 fathoms) They typically swim at depths ranging from 5–35 metres (16–115 ft). They visit wrecks more often than most other jacks. They remove skin-based parasites by rubbing against the rough skin of passing sharks. Almaco jack also rub against passing scuba divers because they mistake them for sharks.

Appearance
The Almaco jack has a less elongated, more flattened body than most jack species. Their dorsal fin and anal fins are elongated, and their outer edges have a definite sickle shape. The first rays of the Almaco dorsal fin's longest parts are nearly twice as long as the dorsal spines, also different from other jacks. Almaco jacks are generally dusky-colored with faint amber or olive stripes down their sides. Their upper bodies and lower fins are usually dark brown or dark blue-green. The belly is much lighter and appears brassy or lavender. The nuchal bar and most of the fins is dark on adults. Exceptions are the pelvic fins which are white on the ventral sides.

Diet
Boops boops, called the bogue. longspine snipefish, bellowfish, common bellowsfish, snipe-fish, spine trumpet fish, or trumpetfish. striped red mullet. porgies. Swallowtail seaperch. European pilchard. chub mackerel. Axillary wrasse. blue jack mackerel.

Method of Catching
Vertical Jigging, Artificial Lures, Live bait.

Edible
Almaco jack can cause a disease in humans called ciguatera through bioaccumulation of ciguatoxin produced by a microscopic organism called dinoflagellate. The flesh is thick and dense like tuna and can easily pass for white albacore if prepared as sushi.

Spawning ground/Season
They reach a typical length of 90 centimetres (35 in), sometimes reaching 160 centimetres (63 in) and 59.9 kilograms (132 lb). Spawning can occur at various times throughout the spring, summer and fall depending on latitude.


Monday, 2 April 2012

Skipjack Tuna/aku/arctic bonito/mushmouth/oceanic bonito/striped tuna/victor fish


Name
The skipjack tuna, Katsuwonus pelamis, is a medium-sized perciform fish in the tuna family, Scombridae. It is otherwise known as the aku, arctic bonitomushmouth, oceanic bonito, striped tuna, or victor fish. It grows up to 1 m (3 ft) in length. 
Location
Algeria, Amer Samoa, Andaman Is, Angola, Anguilla, Antigua Barb, Argentina, Aruba, Ascension I. Australia, Bahamas, Bangladesh, Barbados, Belgium, Belize, Benin, Bermuda, Br Ind Oc Tr, Br Virgin Is, Brazil, Brunei Darsm, Cambodia, Cameroon, Canada, Canary Is, Cape Verde, Cayman Is, Chagos Is, Chile, China Main, Christmas I. Cocos Is, Colombia, Comoros, Congo Dem Rep, Congo Rep, Cook Is, Costa Rica, Cote d'Ivoire, Cuba, Curaçao I. Djibouti, Dominica, Dominican Rp, East Timor, Ecuador, El Salvador, Eq Guinea, Fiji, Fr Guiana, Fr Polynesia, FranceGabon, Galapagos Island, Gambia, Germany, Ghana, Gibraltar, Grenada, Guadeloupe, Guam, Guatemala, Guinea, GuineaBissau, Guyana, Haiti, Hawaii, Honduras, Hong Kong, India, Indonesia, Iran, Ireland, Isle of Man, Italy, Jamaica, Japan, Johnston I. Jordan, Kenya, Kermadec Is, Kiribati, Korea Rep, Liberia, Madagascar, Madeira Is, Malaysia, Maldives, Malta, Marquesas Is, Marshall Is, Martinique, Mauritania, Mauritius, Mexico, Micronesia, Monaco, Montserrat, Morocco, Mozambique, Myanmar, N Marianas, Namibia, Nauru, NethAntilles, Netherlands, New Caledonia, New Zealand, Nicaragua, Nigeria, Niue, Norfolk I. Norway, Ogasawara Is, Oman, Pac Is Tr Tr, Pakistan, Palau, Panama, Papua N Guin, PeruPhilippines, Portugal, Puerto Rico, Reunion, Ryukyu Is, Saint Lucia, Samoa, Sao Tome Prn, Senegal, Seychelles, Sierra Leone, Singapore, Slovenia, Solomon Is, Somalia, South Africa, Spain, Sri Lanka, St Helena, St Kitts Nev, St Vincent, Suriname, Sweden, Syria, Tahiti, Taiwan, Tanzania, Thailand, Togo, Tokelau, Tonga, Trinidad Tob, Tuamotu Is, Turkey, Turks Caicos , Tuvalu, UK, UK Engld Wal, Untd Arab Em, Uruguay, US Minor Is, US Virgin Is, USA, Vanuatu, Venezuela, Viet Nam, Wake I. Wallis Fut I, Yemen.

Diet
Favored fishes in their diet are herrings, mackerels, lanternfish, flying fish, squid, butterfish, sand launce, sardines, needlefish, jellyfish and crustaceans. cannibalism is common.


Habitat
The skipjack tuna is an epipelagic fish, occurring in waters ranging in temperature from 58-86°F (14.7 to 30°C) Exhibit a strong tendency to school into shoals based upon their size in surface waters with birds, drifting objects, sharks, whales and may show a characteristic behavior like jumping, feeding, foaming during the day, diving down to depths of ~260m during the night.
Spawning Season/Ground
Larvae restricted to waters with surface temperatures of 15°C to 30°C. Maturing at 2 to 3 years old (40cm in length) Eggs and larvae are pelagic, Skipjack can have a life span as long as 8 - 12 years.

Appearance
The Skipjack Tuna is characterized by its "tuna-like" appearance that is dark blue on its back and silver on its flank and belly. It has a series of 4 - 6 horizontal-diagonal stripes along its upper sides, and no spots between the pelvic and pectoral fins. The Skipjack Tuna might be confused with the Black Skipjack, Eurhynnus lineatus which has 5 - 6 horizontal stripes along its upper sides but has distinguishing black spots or botches between its pelvic and pectoral fins; the Striped Bonito, Sarda orientalis 8 - 11 broken horizontal stripes along its sides, and no spots, and the Eastern Pacific Bonito, Sarda chilensis 5 - 6 oblique dark stripes on upper back and no spots.

Predators
Silvertip sharks, Whaler sharks, Dolphinfish, Black Marlin, Atlantic blue marlin, Shortfin Mako shark, Wahoo, Indo-Pacific blue marlin.


Method of catching
Also taken by trolling on light tackle using plugs, spoons, feathers, or strip bait Trolling at speeds of around 3-5 mph in the open ocean waters with skirted lures is the most productive method with blue, pink, white or orange small skirt lures works all the time also throwing small live baitfish near a floating object in the water causes them to go into a feeding frenzy.

Edible
It is an important commercial and game fish, usually caught using purse seine nets, and is sold fresh, frozen, canned, dried, salted, and smoked. Skipjack is considered to have "moderate" mercury contamination. As a result, pregnant women are advised against eating large quantities.

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