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A formal freshwater mussel fishing industry was established in the mid-1850s to take advantage of this natural resource. [17] The "pearl rush" to find freshwater pearls became so intense in some rivers that millions of freshwater mussels were killed in a few years. In some rivers and streams entire freshwater mussel beds were completely eliminated.
The freshwater pearl mussel (Margaritifera margaritifera) is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.. Although the name "freshwater pearl mussel" is often used for this species, other freshwater mussel species (e.g. Margaritifera auricularia) can also create pearls and some can also be used as a source of mother of pearl.
Margaritiferidae is a family of medium-sized freshwater mussels, aquatic bivalve molluscs in the order Unionida. [1] [2] It is the most threatened of all unionid families.[3]The family is sometimes referred to as the freshwater pearl mussel family, [4] but "freshwater pearl mussel" more often applies to the species Margaritifera margaritifera.
Margaritifera margaritifera (Linnaeus, 1758) — Freshwater pearl mussel (includes Margaritifera margaritifera durrovensis Phillips, 1928) Margaritifera marrianae R. I. Johnson, 1983; The following fossil species are known from the mid-Cretaceous of Mongolia, being formerly classified in the genus Unio: [2] †Margaritifera elongata (Martinson ...
The mussel was downlisted to threatened status in 1993 when more populations were discovered. It was found to inhabit eight streams in the Red River drainage in Grant Parish, Louisiana. [8] It also once occurred in Arkansas, but it has been extirpated from all the waterways there. [6] It is a federally listed threatened species of the United ...
A particularly worrisome mussel species has entered North America for the first time through the Sacramento-San Joaquin River Delta — sparking what many are calling an immediate threat to ...
Chinese freshwater mussels were once grafted up to 50 times per shell, or 25 times per valve. This practice was common when the industry mussel was primarily the cockscomb pearl mussel (Cristaria plicata). This mussel produced a high volume of low-quality pearls that came to be known as "raisin pearls" in the 1970s and
Margaritifera auricularia is a species of European freshwater mussel, an aquatic bivalve mollusk in the family Margaritiferidae, the freshwater pearl mussels.Formerly found throughout western and central Europe, the species is now critically endangered and is one of the rarest invertebrates worldwide, being confined to a few rivers in Spain and France.
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