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Indo-Pacific blue marlin : ウィキペディア英語版
Atlantic blue marlin

The Atlantic blue marlin (''Makaira nigricans'') is a species of marlin endemic to the Atlantic Ocean. The Atlantic blue marlin (hereafter, blue marlin) feeds on a wide variety of organisms near the surface. It uses its bill to stun, injure, or kill while knifing through a school of fish or other prey, then returns to eat the injured or stunned fish. Marlin is a popular game fish. The relatively high fat content of its meat makes it commercially valuable in certain markets. It is the national fish of the Commonwealth of the Bahamas and is thus featured on its Coat of Arms.
Blue marlin are distributed throughout the tropical and subtropical waters of the Atlantic, Indian, and Pacific Oceans. A bluewater fish that spends the majority of its life in the open sea far from land,〔
.〕 the blue marlin preys on a wide variety of marine organisms, mostly near the surface, often using its bill to stun or injure its preys.
Females can grow up to four times the weight of males. The maximum published weight is and length .
Adult blue marlin have few predators apart from man. They are sought after as a highly prized game fish by anglers and are taken by commercial fishermen, both as a directed catch and as bycatch in major industrial tuna fisheries. Blue marlin are currently considered a threatened species by the IUCN due to overfishing.〔
Some other historic English names for the blue marlin are Cuban black marlin, ocean gar, and ocean guard.〔

==Taxonomy and naming==
The blue marlin is placed in the genus ''Makaira''. This name is derived from the Greek word ''machaira'', meaning "a short sword or bent dagger", and the Latin ''machaera'', "sword".〔
〕〔

The specific epithet ''nigricans'' is Latin for "becoming black".〔

The blue marlin is part of the billfish family Istiophoridae and is in the perch-like order Perciformes. In addition, it is in the suborder Xiphioidei and is a member of the subclass Neopterygii, which means "new wings". It is also in the class of Actinopterygii, which includes ray-finned fishes and spiny-rayed fishes, and the superclass Osteichthyes, which includes all of the bony fishes.〔
〕〔

The classification of the Atlantic blue marlin (''Makaira nigricans'') and the Indo-Pacific blue marlin (''Makaira mazara'') as separate species is under debate. Genetic data suggest, although the two groups are isolated from each other, they are both the same species, with the only genetic exchange occurring when Indo-Pacific blue marlin migrate to and contribute genes to the Atlantic population.〔
, see page 429.〕 A separate study by V. P. Buonaccorsi, J. R. Mcdowell, and Graves indicated that both Indo-Pacific and Atlantic show "striking phylogeographic partitioning" of mitochondrial and microsatellite loci.〔
.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Atlantic blue marlin」の詳細全文を読む



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