Blackfin tuna
Blackfin tuna | |
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Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Scombriformes |
Family: | Scombridae |
Tribe: | Thunnini |
Genus: | Thunnus |
Subgenus: | Neothunnus |
Species: | T. atlanticus
|
Binomial name | |
Thunnus atlanticus (
Lesson , 1831) | |
Synonyms[2] | |
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The blackfin tuna (Thunnus atlanticus) is a
Blackfin tuna are considered tropical, warm water fish. They have a relatively small distribution throughout the Eastern Coast of North and South America. They are located from Massachusetts to Rio de Janeiro in Brazil, and also inhabit the Gulf of Mexico and the Caribbean Sea.[5][2]
The blackfin tuna has less commercial value than its close relatives like the yellowfin, bluefin, and skipjack tuna, but is still a major sport fish in Florida and regions of the Caribbean like Cuba and the Bahamas.[4][5] However, the taste and quality of blackfin tuna is comparable to that of its popular relatives, and can be prepared in the same ways. It is also sushi grade. Methods of capture include trolling, drift fishing, and sport fishing with a pole and live bait or lures like ballyhoo, mullet, small fishes or strip baits, feathers, jigs, or plugs.[3][5]
As of 2010, blackfin tuna were deemed "least concern" by the IUCN.[4]
Description
Blackfin tuna are the smallest species of tuna. The All-Tackle world record blackfin tuna was caught off the coast of Florida and weighed 20.6 kg (45 lb 7 oz).[5] Their oval shaped bodies have a dark blue to black colored back. The sides and belly of the fish are silver, which gives them an iridescent appearance in the water, with a lateral yellow stripe. They have durable, compact scales with an oblique mouth.[5][2]
Blackfin tuna have small dorsal
Biology/Ecology
Blackfin tuna hunt both
This species is host to 9 known parasites including Digenea, Monogenea, cestoda, nematoda copepods, and cookiecutter shark. The remaining parasites are parasitic copepods like caligus coryphaena, C. productus, Euryphorus brachpterus, and pseudocycnus.[5]
Life History
They are a short-lived, fast-growing species; a 5-year-old fish would be considered old. They reach sexual maturity at the age of 2 years when they weigh roughly 4-6 lbs.[6] Juvenile stages of all Tuna species are very similar due to close life histories, although the species have significant differences as adults.[7]
Spawning typically occurs off the coast of Florida in the months between April and November. In the Gulf of Mexico and near northern Brazil spawning occurs from June to September.[5][8] In fact, the Gulf of Mexico is thought to be one of the most ideal spawning sites for blackfin tuna. The physiochemical make-up of the Gulf of Mexico makes it an indispensable nursery habitat.[8] One factor potentially influencing the favorable conditions of the Gulf of Mexico is the nutrient outflow from the Mississippi River; this outflow feeds the high metabolism of larval blackfin tuna.[8]
Blackfin tuna are a warmer-water fish, preferring water temperatures over 20 °C (68 °F).[6] The females release eggs into the water column to be fertilized by sperm. Fertilization of their eggs produces pelagic larvae which can be found on the surface of the water all the way to depths of 164 feet.[5][7]
Blackfin tuna are preyed on by other, larger fish species such as
Sustainable consumption
In 2010, Greenpeace International did not add the blackfin tuna, unlike other tuna species, to its seafood red list. [9]
References
- . Retrieved 19 November 2021.
- ^ a b c d Froese, Rainer; Pauly, Daniel (eds.) (2018). "Thunnus atlanticus" in FishBase. February 2018 version.
- ^ a b c d e "IGFA Member Services". International Game Fish Association. Retrieved 2022-04-29.
- ^ doi:10.2305/iucn.uk.2011-2.rlts.t155276a4764002.en.)
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(help - ^ a b c d e f g h i j k l "Thunnus atlanticus". Florida Museum. 2017-05-11. Retrieved 2022-04-29.
- ^ a b "Biological Info: Blackfin Tuna". Seagrant Fish: Louisiana Fisheries.
- ^ ISSN 0171-8630.
- ^ .
- ^ Greenpeace International Seafood Red list Archived February 5, 2010, at the Wayback Machine
External links
- Media related to Thunnus atlanticus at Wikimedia Commons
- Data related to Thunnus atlanticus at Wikispecies
- FishBase info for black tuna
- Blackfin Tuna Identification
- Encyclopedia of Life Info for Thunnus atlanticus