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Arapaima gigas are exploited for fish meat markets and ornamental fishing which can include production, as it has been noted that the characteristic armored scales are commonly used as nail files in areas around the Amazon basin. [13] Fishing and aquaculture provides many jobs in the region, in addition to the fish being an important ...
Indeed, a 2014 study found that the fish were depleted or overexploited at 93% of the sites examined and well-managed or unfished in only 7%; the fish appeared to be extirpated in 19% of these sites. [ 31 ] [ 32 ] The status of the arapaima population in the Amazon River Basin is unknown, hence it is listed on the IUCN red list as data deficient .
The condition index in fish is a way to measure the overall health of a fish by comparing its weight with the typical weight of other fish of the same kind and of the same length. The condition index is its actual weight divided by its expected weight, times 100%. A fish of normal weight has a condition index of 100 percent.
Standard weight equation for largemouth bass [1] and burbot [2] (fish). Standard weight in fish is the typical or expected weight at a given total length for a specific species of fish. Most standard weight equations are for freshwater fish species. Weight-length curves are developed by weighing and measuring samples of fish from the population.
A new species of fish has been discovered in the Amazon: a piranha relative with humanlike teeth. The eye-catcher was named after a “Lord of the Rings” villain.
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