Ecology

Habitat

Habitat and Ecology

Systems
  • Marine
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Depth range based on 101 specimens in 1 taxon.
Water temperature and chemistry ranges based on 101 samples.

Environmental ranges
  Depth range (m): 1 - 18
  Temperature range (°C): 26.803 - 28.432
  Nitrate (umol/L): 0.033 - 0.090
  Salinity (PPS): 34.519 - 34.975
  Oxygen (ml/l): 4.501 - 4.666
  Phosphate (umol/l): 0.063 - 0.131
  Silicate (umol/l): 1.005 - 1.659

Graphical representation

Depth range (m): 1 - 18

Temperature range (°C): 26.803 - 28.432

Nitrate (umol/L): 0.033 - 0.090

Salinity (PPS): 34.519 - 34.975

Oxygen (ml/l): 4.501 - 4.666

Phosphate (umol/l): 0.063 - 0.131

Silicate (umol/l): 1.005 - 1.659
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.
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Depth range based on 101 specimens in 1 taxon.
Water temperature and chemistry ranges based on 101 samples.

Environmental ranges
  Depth range (m): 1 - 18
  Temperature range (°C): 26.803 - 28.432
  Nitrate (umol/L): 0.033 - 0.090
  Salinity (PPS): 34.519 - 34.975
  Oxygen (ml/l): 4.501 - 4.666
  Phosphate (umol/l): 0.063 - 0.131
  Silicate (umol/l): 1.005 - 1.659

Graphical representation

Depth range (m): 1 - 18

Temperature range (°C): 26.803 - 28.432

Nitrate (umol/L): 0.033 - 0.090

Salinity (PPS): 34.519 - 34.975

Oxygen (ml/l): 4.501 - 4.666

Phosphate (umol/l): 0.063 - 0.131

Silicate (umol/l): 1.005 - 1.659
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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Molecular Biology and Genetics

Molecular Biology

Barcode data: Tridacna crocea

The following is a representative barcode sequence, the centroid of all available sequences for this species.


There are 168 barcode sequences available from BOLD and GenBank.

Below is a sequence of the barcode region Cytochrome oxidase subunit 1 (COI or COX1) from a member of the species.

See the BOLD taxonomy browser for more complete information about this specimen and other sequences.

GTGATAATTCGAACAGAATTGGCATGGCCTGCTTCATGGTTGCAGAAT---AATGCCCTTTATAATGTAATTGTTACAACTCATGCCTTAATTATGATTTTTTTTATAGTAATACCAGTCATAATAGGTGGATTTGGAAATTGGCTTGTACCTTTAATAATAGTA---ATACCAGATATACACTTCCCTCGTTTAAACAATCTAAGGTTTTGGTTTGTGCCAAATGCATTTTTTTTGCTCGGAGTGTCTGGGTTTGTAGAAGGAGGTGTAGGAGCTGGTTGAACAATCTATCCCCCTTTGACTTCTATTGATTTCCTAAGAGACCCTTCTATAGATCTT---GCTATTTTTTCGCTTCATCTTGGGGGTGCTTCTTCTATTGCAGCTAGGTTAAATTTTGCAAGGACTGTAGCTAATATACGC------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------CAT---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------CAA------------------------------------------------------------------------------------------AAACGTGGGTTT
-- end --

Download FASTA File

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Statistics of barcoding coverage: Tridacna crocea

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 134
Specimens with Barcodes: 137
Species With Barcodes: 1
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Conservation

Conservation Status

IUCN Red List Assessment


Red List Category
LR/lc
Lower Risk/least concern

Red List Criteria

Version
2.3

Year Assessed
1996
  • Needs updating

Assessor/s
Mollusc Specialist Group

Reviewer/s

Contributor/s

History
  • 1994
    Insufficiently Known (K)
  • 1990
    Insufficiently Known (K)
  • 1988
    Insufficiently Known (K)
  • 1986
    Insufficiently Known (K)
  • 1983
    Insufficiently Known (K)
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Wikipedia

Boring clam

The boring clam, crocus clam, crocea clam or saffron-coloured clam (Tridacna crocea) is a species of bivalve in the family Cardiidae. It is native to the Indo-Pacific region. It is occasionally found in the aquarium trade [3] where it is often simply referred to as crocea.[4]

Description[edit]

The boring clam is the smallest clam in the subfamily Tridacninae and grows to a maximum shell size of 15 cm (6 in).[5] It has two, thick valves joined together by a hinge which is typically between a third and less than a half of the width of the shell. Typically shells are slightly to moderately elongate, and the animal is strongly inflated, especially near the hinge. The upper valve has six to ten flattish folds which interlock at the margin with similar folds on the lower valve so that they can clamp together and the shell can close tightly. The lower valve has slits through which the byssal threads emerge which secure the animal to the seabed. This clam burrows into the substrate and this process tends to wear away the outer surface of the valves and smooth them off. They also may become distorted by burrowing into substrates of uneven hardness.[4]

The colour of the valves is generally greyish-white, sometimes with a hint of pink-orange, yellow or orange colour -this colouration can form a band near the top margin, especially on the interior surface. The mantle, the soft body wall which covers the animal's internal organs, projects from between the valves when they are open and is brightly coloured. It can be various shades of blue, green, purple, gold, orange or brown, often patterned with spots, stripes or squiggles. It has many small protrusions on the exposed surface and a line of simple eyes near the margin. The inhalent siphon, through which water is drawn into the shell, is surrounded by many small tentacles and the exhalent siphon is often long and tubular.[4]

Distribution and habitat[edit]

The boring clam is native to the Indo-Pacific. Its range extends from Malaysia, Vietnam and Japan to Indonesia, the Philippines, Palau, New Guinea, Australia, the Solomon Islands and Vanuatu. At one time it was known from Guam and the Northern Mariana Islands but it may now be locally extinct in these locations.[1] Its typical habitat is embedded in massive corals.[5]

References[edit]

  1. ^ a b Mollusc Specialist Group (1996). "Tridacna crocea". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 2014-04-09. 
  2. ^ Bouchet, P.; Rosenberg, G.; ter Poorten, J. (2013). "Tridacna crocea Lamarck, 1819". World Register of Marine Species. Retrieved 2014-04-09. 
  3. ^ Huelsken, T., Keyse, J., Liggins, L., Penny, S., Treml, E.A., Riginos, C. (2013) A Novel Widespread Cryptic Species and Phylogeographic Patterns within Several Giant Clam Species (Cardiidae: Tridacna) from the Indo-Pacific Ocean. PLoS ONE, DOI: 10.1371/journal.pone.0080858.
  4. ^ a b c Fatherree, James. "A Close-up Look at Tridacna crocea". Invertebrate corner. Reefkeeping Magazine. Retrieved 2014-04-10. 
  5. ^ a b "Tridacna crocea Lamarck, 1819". AC22 Doc. 10.2: Annex 8c. CITES. Retrieved 2014-04-09. 
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