Is Pinctada a bivalve?
Pinctada is a genus of saltwater oysters, marine bivalve mollusks in the family Pteriidae. These pearl oysters have a strong inner shell layer composed of nacre, also known as “mother of pearl”.
Is Pinctada edible?
Human uses. Pinctada radiata is harvested for pearls, especially in Qatari waters, where it may constitute up to 95% of the oyster catch. It is also caught for its edible flesh and lustrous shell.
What is the common name of Pinctada?
Pacific pearl-oyster
Integrated Taxonomic Information System – Report
| Kingdom: | Animalia |
| Taxonomic Rank: | Species |
| Synonym(s): | |
| Common Name(s): | Pacific pearl-oyster [English] |
| Taxonomic Status: |
What is the meaning Pinctada?
Definition of Pinctada : a genus of bivalve mollusks (family Pteriidae) containing the principal pearl oysters.
What is the respiratory organ in Pinctada?
There are two symmetrical, flat, crescent-shaped and filamentous gills, characteristic of bivalves with lamellibranch gills. The gills function in filter feeding and respiration. The feeding function is via their connection to the labial palps to form the pallial organ.
What is nacre also known as?
Nacre (/ˈneɪkər/ NAY-kər, also /ˈnækrə/ NAK-rə), also known as mother of pearl, is an organic–inorganic composite material produced by some molluscs as an inner shell layer; it is also the material of which pearls are composed. It is strong, resilient, and iridescent.
Why is Pinctada called pearl oyster?
Pearl oysters (Pinctada) are the source of most commercially valuable pearls. Pearls are formed when the oyster secretes shiny layers of calcium carbonate to coat irritating particles or parasites lodged between the mantle and the iridescent inner surface of the shell, which is called mother-of-pearl.
How does Pinctada respire?
There is reciprocal exchange of O2 and CO2 as they diffuse passively across the fine filament membranes according to the gradients between seawater and hemolymph. There is also some gas exchange between seawater and hemolymph across the large permeable surfaces of the mantle.
Why is nacre called mother of pearl?
When an irritant penetrates the protective shell of a mollusk, the mollusk gets to work. To protect itself from the intrusion, the mollusk secretes the only material it has at its disposal: nacre. Thus nacre is called mother of pearl, because it is the same material that gives us the fabulous pearl.
How strong is nacre?
obtained the mechanical properties of nacre for species Pintada umbricata [44]. They reported a modulus of about 70 GPa and a tensile strength of about 170 GPa.
Who is considered the father of the cultured pearl industry?
Kokichi Mikimoto
Claude M. Adams with Kokichi Mikimoto, the father of the cultured pearl industry.
Is Pinctada radiata hermaphroditic?
P. radiata is hermaphroditic, with reproductive maturity being influenced by temperature. Pinctada radiata occurs throughout the Indo-Pacific and Mediterranean Sea at all depths, though it is generally found between 5 and 25 metres (16 and 82 ft).
Where is Pinctada radiata found in the ocean?
Pinctada radiata occurs throughout the Indo-Pacific and Mediterranean Sea at all depths, though it is generally found between 5 and 25 metres (16 and 82 ft). It attaches itself to various hard substrata, including rocks and wrecks.
What is another name for Pinctada vulgaris?
In recent times, depending on the area, it has been generally known as Pinctada imbricata (Central America and Australia), Pinctada radiata (Persian Gulf, Red Sea, Mediterranean Sea), Pinctada vulgaris (Sri Lanka), and Pinctada fucata (Japan, India, Eastern Pacific ocean).
What is Pinctada radiata (pearl oyster)?
Pinctada radiata (Pearl Oyster): a bioindicator for metal pollution monitoring in the Qatari waters (Arabian Gulf). Bulletin of Environmental Contamination and Toxicology, 60:245-251. Al-Sayed H; Mahasneh A; Al-Saad J, 1994.