Tridacna derasa   (Röding, 1798)

Smooth giant clam

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Tridacna derasa

Classification / Names Common names | Synonyms | CoL | ITIS | WoRMS

Bivalvia | Cardiida | Cardiidae

Environment: milieu / climate zone / depth range / distribution range Ecology

Benthic; depth range 0 - 20 m (Ref. 348), usually 0 - 15 m (Ref. 75831).  Tropical; 23°C - 30°C (Ref. 102835); 19°N - 34°S, 100°E - 174°W (Ref. 106696)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Introductions

Indo-West Pacific.

Length at first maturity / Size / Weight / Age

Maturity: Lm ?  range ? - ? cm Max length : 60.0 cm SHL male/unsexed; (Ref. 348); common length : 50.0 cm SHL male/unsexed; (Ref. 348)

Short description Morphology

It is characterized by a low primary and radial sculpture, variable shape, massive umbonal area and smooth white shell.

Biology     Glossary (e.g. epibenthic)

Locally exploited for meat and shell. This species was previously quite abundant, but has been over collected in many areas. Aquaculture attempts being made (Ref. 348). Found in intertidal areas on corals (Ref. 75831), mainly on reef flats, barrier reefs, fore reefs and atoll lagoons (Ref. 117184). Common in shallow waters wherein juveniles are byssally attached to the tops and sides of coral outcrops. Adults are thought to detach their byssus and settle in clear ocean conditions at 20 m depth (Ref. 101207).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Life cycle: Embryos develop into free-swimming trocophore larvae, succeeded by the bivalve veliger, resembling a miniature clam (Ref. 833).

Main reference References | Coordinator | Collaborators

SAUP Database. 2006. (Ref. 356)

IUCN Red List Status (Ref. 130435)

  Vulnerable (VU) (A2cd); Date assessed: 01 August 1996

CITES status (Ref. 108899)

Appendix II: International trade monitored

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Human uses

Fisheries: commercial
FAO - Aquaculture: production; | FishSource | Sea Around Us

Tools

E-book | Field guide

More information

Countries
FAO areas
Ecosystems
Occurrences
Introductions
Stocks
Ecology
Diet
Food items
Common names
Synonyms
Predators
Reproduction
Maturity
Spawning
Fecundity
Eggs
Egg development
Age/Size
Growth
Length-weight
Length-length
Morphology
Larvae
Abundance
References
Mass conversion
Collaborators
Pictures

Internet sources

BHL | BOLD Systems | CISTI | DiscoverLife | FAO(; publication : search) | Fishipedia | GenBank (genome, nucleotide) | GloBI | Gomexsi | Google Books | Google Scholar | Google | PubMed | Tree of Life | Wikipedia (Go, Search) | Zoological Record

Estimates based on models

Preferred temperature (Ref. 115969): 24.7 - 29.3, mean 28.6 (based on 2248 cells).
Resilience (Ref. 69278): Low, minimum population doubling time 4.5 - 14 years (K=0.11-0.11; tm=4).
Vulnerability (Ref. 71543): High vulnerability (64 of 100).
Price category (Ref. 80766): Unknown.