11 Jul '11, 11am

The Endangered Tuna: For the first time, all scombrid species (tunas, bonitos, mackerels and Spanish mackerels)

For the first time, all scombrid species (tunas, bonitos, mackerels and Spanish mackerels) and billfishes (swordfish and marlins) have been assessed for the IUCN Red List of Threatened Species. Of the 61 known species, 7 are thought to be at serious risk of extinction and are classified in a threatened category. Critically Endangered is the highest risk category assigned by the IUCN Red List for wild species. Critically Endangered means that a species' numbers have decreased, or will decrease, by 80% within three generations. Tuna is a salt water fish from the family Scombridae, mostly in the genus Thunnus. Tuna are fast swimmers, and some species are capable of speeds of 43 mph. Unlike most fish, which have white flesh, the muscle tissue of tuna ranges from pink to dark red. The red coloration derives from myoglobin, an oxygen-binding molecule, which tuna express in quant...

Full article: http://www.enn.com/enn_original_news/article/42898

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The Endangered Tuna

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For the first time, all scombrid species (tunas, bonitos, mackerels and Spanish mackerels) and billfishes (swordfish and m...

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