Pearl Oysters


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Pearl Oysters

 

the common name for marine and fresh-water bivalve mollusks in whose mantles pearls can form. Marine oysters of the genus Pinctada, with round shells, live in tropical waters and are harvested for their pearls. In Japan they are raised. Freshwater oysters of the species P. margaritifera, with kidney-shaped shells, live in temperate climates in rivers with pure, clear water. The insides of oyster shells are covered with a thick layer of mother-of-pearl, which is used to make buttons and other articles.

REFERENCE

Ivanov, A. V. Promvslovve vodnye bespozvonochnve. Moscow, 1955.
References in periodicals archive ?
Each pearl farm has its own experience and empirical "rules" for their protocol; for example, whether or not a grafter realizes a surgreffe on a pearl oyster after harvesting an undesirable circled or nonround pearl.
Most of the pearls you see are cultivated or come from pearl oysters.
Doing all and everything to help foster a larger natural stock of the Gulf Pearl oyster is paramount to keeping a growing tide of pollution of the Gulf by GCC countries at bay.
By the late 1500's, the pearl oysters in Venezuela and Colombia had become much scarcer as a result of intensive fishing by hundreds of divers (Landman et al.
The agency began investigating the case after a local pearl farmer reported Sunday that his pearl oysters had been stolen, the officials said.
Pearl oysters live in the deep sea and it takes years for a pearl to form.
One remedy for the decline of Akoya pearl oysters is to develop culture methods for other species of pearl oysters, and Pteria penguin is a suitable candidate.
To test this theory that these proteins actually produced pearls, the Japanese scientists tried to eliminate the two proteins from Japanese pearl oysters.
Black-lipped pearl oysters are still found by skin divers off the intriguingly named Mogo Mogo and Casayeta.
Jean-Marie Domard hired Japanese grafters to implant nuclei into 5,000 pinctada magaretifira, or black pearl oysters.
Fish and Wildlife Service,(1) was detailed to Panama at the request of that Government to determine the cause of a rapid decline since about 1925 in the abundance of pearl oysters around the Archipielago de las Perlas in the Gulf of Panama (Fig.