Gastropoda |
Ostreida |
Margaritidae
Environment: milieu / climate zone / গভীরতার পরিসীমা / distribution range
বাস্তুসংস্থান
; গভীরতার পরিসীমা 0 - 20 m (সূত্র 348). Tropical
Indo-Pacific and North Atlantic: from Cocos (Keeling) Islands to eastern Polynesia; north to Japan and south to northern New South Wales, Kermadec, Norfolk and Lord Howe Islands.
Length at first maturity / আকৃতি / Weight / Age
পরিপক্কতা : Lm ? range ? - ? cm Max length : 6.0 cm ShL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (সূত্র 348); common length : 5.0 cm SL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (সূত্র 348)
Shell rather thin and small, subquadrate in outline, with a short and ill-defined posterior ear which is not drawn out into a wing-like process. Anterior margin protruding only slightly or not at all beyond the tip of the anterior ear. Outer surface of shell, when not worn, covered with numerous, flattened and brittle, imbricating concentric scales bearing slender, radially projecting spines, especially toward the margins. Hinge lines with 2 small teeth on each valve; 1 rounded anterior tubercle just in front of the umbo, and 1 slightly slanting posterior ridge behind the ligamental area. Parallel accessory ridges sometimes developed on both valves, so that the posterior teeth appear double. Colour: outside of shell with a variable coloration, usually white to tan with a number of purple, or brown to black radiating bands and sometimes a superimposed pattern of finely wavy concentric lines of reddish brown. Internal nacreous area with pale yellow to deep orange-gold tint. Non-nacreous margin with white porcelaneous patches, generally alternating with irregular, dark purplish brown or black blotches.
Found in intertidal rock pools, to immediate subtidal depths on reefs (Ref. 377). Byssally attached to rocks, the underside of stones or coral pieces. Littoral and sublittoral to a depth of about 20 m. Extremely common in shallow water Polynesian lagoons. Produces regular but rather small yellow pearls. Locally exploited for its edible meat, golden nacreous shell and, sometimes, for pearls (Ref. 348).
Life cycle and mating behavior
পরিপক্কতা | প্রজনন | ডিম ছাড়া | Eggs | ডিম্বধারন ক্ষমতা | Larvae
Members of the class Bivalvia are mostly gonochoric, some are protandric hermaphrodites. Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam.
Poutiers, J.M. 1998 Bivalves. Acephala, Lamellibranchia, Pelecypoda. p. 123-362. In Carpenter, K. E. and V. H. Niem. 1998. FAO species identification guide for fishery purposes. The living marine resources of the Western Central Pacific. Volume 1. Seaweeds, corals, bivalves, and gastropods. Rome, FAO. (সূত্র 348)
IUCN Red List Status
(সূত্র 130435: Version 2025-1)
CITES status (সূত্র 108899)
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
| FishSource |
হাতিয়ার
আরো তথ্য
ট্রফিক বাস্তুতন্ত্র Food items (preys)
পথ্য উপাদান
খাদ্য গ্রহণ
শিকারী প্রাণী সমূহ
Population dynamicsবৃদ্ধিMax. ages / sizesLength-weight rel.Length-length rel.Length-frequenciesMass conversionপ্রাচুর্য Life cycleপ্রজনন পরিপক্কতা ডিম্বধারন ক্ষমতা ডিম ছাড়া EggsEgg developmentLarvae Physiologyঅম্লজান ব্যবহার
Human RelatedStamps, coins, misc.
ইন্টারনেট সুত্র
Estimates based on models
Preferred temperature
(Ref.
115969): 23.6 - 29.3, mean 28.3 (based on 3476 cells).
Fishing Vulnerability
Low vulnerability (10 of 100).
Price category
Unknown.
