Gastropoda |
Ostreida |
Margaritidae
Environment: milieu / climate zone / গভীরতার পরিসীমা / distribution range
বাস্তুসংস্থান
; গভীরতার পরিসীমা 0 - 60 m (সূত্র 348), usually 5 - 30 m (সূত্র 348). Tropical
Indo-West Pacific: from Nicobar and Andaman Islands to Melanesia; north to Japan and south to Queensland and Western Australia; Borneo and Moluccas.
Length at first maturity / আকৃতি / Weight / Age
পরিপক্কতা : Lm ? range ? - ? cm Max length : 30.0 cm ShL পুরুষ/ লিঙ্গ অনিধর্ারিত ; (সূত্র 348); common length : 20.0 cm SHH পুরুষ/ লিঙ্গ অনিধর্ারিত ; (সূত্র 348)
Shell rather thick and large (attaining 30 cm in length), subcircular in outline, with a short and ill-defined posterior ear which is not drawn out into a wing-like process. Anterior margin markedly protruding beyond the tip of anterior ear. Outer surface of valves, when not worn, covered with flattened, imbricating concentric scales bearing large and irregular, flat spines with blunt ends, roughly arranged in radial rows and projecting at shell margins. Hinge completely devoid of teeth. Colour: outside of shell uniformly fawn, sometimes with radial stripes of darker spots in umbonal region; then, ground colour in that region green, dark brown, or purple. Internal nacreous area highly lustrous, silvery with a variably extended golden border. Non-nacreous margin clear, of plain horny colour.
Mainly in clear water under the influence of currents. Often in dense colonies. Littoral and sublittoral to a depth of 60 m; most common from sublittoral at depths of 5 to 30 m (Ref. 348). On various bottoms, byssally attached to hard substrates at least in the young stages (Ref. 348). Inhabits a broad range of habitat, from sand, mud, gravel, seagrass beds, deep-water reefs, to near sponges, soft corals or whip corals. Filter-feeder (Ref. 101206).
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.
SAUP Database 2006 SAUP Database. www.seaaroundus.org. (সূত্র 356)
IUCN Red List Status
(সূত্র 130435: Version 2025-1)
CITES status (সূত্র 108899)
Not Evaluated
Not Evaluated
Threat to humans
Human uses
মৎস্য: বাণিজ্যিক
| FishSource | আমাদের চতুর্পাশ্বের সাগর
হাতিয়ার
আরো তথ্য
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): 24.4 - 29.1, mean 28.2 (based on 1342 cells).
স্থিতিস্থাপক
উচ্চ, সর্বনিম্ন প্রজন দ্বিগুনের সময় ১৫ মাস (K=0.72-0.79).
Fishing Vulnerability
Low vulnerability (18 of 100).
Price category
Unknown.
Nutrients : Calcium = 149 [71, 228] mg/100g; Iron = 8.53 [1.95, 15.11] mg/100g; Protein = 9.88 [8.64, 11.12] %; Omega3 = 0.313 [0.202, 0.423] g/100g; Selenium = 61 [50, 72] μg/100g; VitaminA = 0 μg/100g; Zinc = 2.04 [0.56, 3.51] mg/100g (wet weight); based on
nutrient studies.
