Product Code Database
The Ostreidae, the true oysters, include most species of molluscs commonly consumed as . Pinctada are not true oysters, and belong to the order Pteriida.
Like , true oysters have a central adductor muscle, which means the shell has a characteristic central scar marking its point of attachment. The shell tends to be irregular as a result of attaching to a substrate.
Both Oviparity (egg-bearing) and Viviparity (larvae-bearing) species are known within Ostreidae. Both types are . However, the larviparous species show a pattern of alternating sex within each individual, whereas the oviparous species are simultaneous , producing either female or male according to circumstances.
Members of genus Ostrea generally live continually immersed and are quite flat, with roundish shells. They differ from most bivalves by having shells completely made up of calcite, but with internal muscle scars of Aragonite composition. They fare best in somewhat water. They brood their Zygote for various proportions of the period from Fertilisation to hatching.
Members of genera Saccostrea, Magallana, and Crassostrea generally live in the intertidal zone, broadcast sperm and eggs into the sea, and can thrive in eutrophic water. One of the most commonly cultivated oysters is the Pacific oyster, which is ideally suited for aquaculture in seawater ponds.
|
|
