Brief description
A study of the population genetics of giant clams of the genus Tridacna from the Great Barrier Reef and the West Pacific. Variations in gene frequencies of allozymes and common proteins were used to estimate connectivity and dispersal between populations, and to determine the phylogeny of the genus (discrete species identities). Species studied were Hippopus hippopus, Hippopus porcellanus, Tridacna crocea, Tridacna derasa, Tridacna gigas, Tridacna maxima, Tridacna squamosa and Tridacna tevora. Not all loci were examined for all species.Allele frequencies at 6 polymorphic loci of 860 individual clams sampled from 19 populations of Tridacna maxima throughout the Pacific between November 1989 and October 1991 were examined. Collection locations were: Myrmidon, Davies, Michaelmas, Thetford, 13125, 21200, 20396 and Stapleton Reefs on the Great Barrier Reef; Marovo and Nggela in the Solomon Islands; Mili in the Marshall Islands; Bantayan and Tawi-tawi in the Philippines; Te puka in Tuvalu; Abiang and Abemana in Kiribati; Makogai and Makodragi in Fiji; and Aitutaki in the Cook Islands. Loci were: LDH-1, MDH-2, PGM-2, DIA, LGG-1, GSR.Seven polymorphic loci (GPI, MDH-1, PGM, DIAPH, AK, LGG-1, LGG-2) from 159 individuals of T. gigas were sampled from 7 populations thoughout the West Pacific (Marovo, Russell, Isabel and Nggela in the Solomon Islands; Silliman in the Philippines; Abemana in Kiribati; and Mili in the Marshall Islands) and compared to data previously obtained in 1990 from 393 individuals from 6 populations (Myrmidon, Grub, Michaelmas, Thetford, 13125 and Stapleton Reefs) from the Great Barrier Reef.28-40 individuals from 14 populations of Tridacna derasa were sampled from sites on the Great Barrier Reef (2 sites from each of Myrmidon, Bowl, 13125, 21200, 20396; and one site from Michaelmas and Escape Reefs), and from one site each in the Philippines (Scarborough Shoals) and Fiji (Makogai). Gene frequencies at 9 polymorphic loci (GPI, LDH-1, MDH-1, MDH-2, PGM, DIAPH, LGG-1, ENOL, GSR)were examined.Gene frequencies at 26 loci for 8 species of giant clam were examined. Samples were obtained between November 1989 and October 1991. Source and number of individuals sampled was: Hippopus porcellanus (Philippines, 3); Hippopus hippopus (3 -Great Barrier Reef); Tridacna squamosa (8 - GBR, Fiji, Solomon Islands); Tridacna crocea (6 - GBR, Solomon Islands); Tridacna maxima (9 - GBR, Solomon Islands, Cook Islands); Tridacna gigas (9 - GBR, Solomon Islands, Kiribati); Tridacna derasa (9 - GBR, Fiji, Palau); Tridacna tevora (1- Fiji). Polymorphic loci examined were: AAT-1, AK-1, AK-2, DIA-1, ENO-1, EST-1, GPI-1, GSR-1, IDH-1, LDH-1, LDH-2, LGG-1, LGG-2, LP-1, LP-2, LP-3, MDH-1, MDH-2, ME-1, MPI-1, NDH-1, NDH-2, PGK-1, PGM-1, PGM-2.To estimate connectivity and dispersal between Tridacna populations, and to determine the discrete species identities.
Lineage
Maintenance and Update Frequency: notPlannedNotes
CreditWilliams, Suzanne T, Dr (Principal Investigator)
Ballment, Elizabeth R (Beth), Ms (Custodian)
Modified: 12 03 2024
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Phylogenetic relationships among giant clam species (Mollusca: Tridacnidae) determined by protein electrophoresis: Benzie JAH and Williams ST (1998) Phylogenetic relationships among giant clam species (Mollusca: Tridacnidae) determined by protein electrophoresis. Marine Biology 132: 123-133.
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Genetic structure of giant clam (Tridacna maxima) populations in the west Pacific is not consistent with dispersal by present-day ocean currents: Benzie JAH and Williams ST (1997) Genetic structure of giant clam (Tridacna maxima) populations in the west Pacific is not consistent with dispersal by present-day ocean currents. Evolution 51: 768-783.
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Limitations in the genetic variation in hatchery produced batches of the giant clam, Tridacna gigas: Benzie JAH and Williams ST (1996) Limitations in the genetic variation in hatchery produced batches of the giant clam, Tridacna gigas. Aquaculture 139: 225-241.
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Gene flow among giant clam (Tridacna gigas) populations in the Pacific does not parallel ocean circulation: Benzie JAH and Williams ST (1995) Gene flow among giant clam (Tridacna gigas) populations in the Pacific does not parallel ocean circulation. Marine Biology 123: 781-788.
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Review of population genetics of giant clams: Benzie JAH (1993) Review of population genetics of giant clams. pp. 1-6. In: Munro PE (ed) Genetic aspects of conservation and cultivation of giant clams. ICLARM conference proceedings. No. 39. ICLARM.
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Genetics of giant clams: an overview: Benzie JAH (1993) Genetics of giant clams: an overview. pp. 7-13. In: The biology and mariculture of giant clams: a workshop held in conjunction with the 7th International Coral Reef Sympsium, 21-26 June 1992, Guam. ACIAR Proceedings, No.47. Australian Centre for International Agricultural Research.
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Conservation of wild stocks: Policies for the preservation of biodiversity: Benzie JAH (1993) Conservation of wild stocks: Policies for the preservation of biodiversity. pp. 13-16. In: Munro PE (ed) Genetic aspects of conservation and cultivation of giant clams. ICLARM conference proceedings. No. 39. ICLARM.
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Allozyme electrophoretic methods for analysing genetic variation in giant clams (Tridacnidae): Benzie JAH, Williams ST and Macaranas JM (1993) Allozyme electrophoretic methods for analysing genetic variation in giant clams (Tridacnidae). ACIAR Technical Reports 23 1-48.
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Genetic structure of giant clam (Tridacna derasa) populations from reefs in the Indo-Pacific: Macaranas JM, Ablan CA, Pante JRM, Benzie JAH and Williams ST (1992) Genetic structure of giant clam (Tridacna derasa) populations from reefs in the Indo-Pacific. Marine Biology 113: 231-238.
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No genetic differentiation of giant clam Tridacna gigas populations in the Great Barrier Reef, Australia: Benzie JAH and Williams ST (1992) No genetic differentiation of giant clam Tridacna gigas populations in the Great Barrier Reef, Australia. Marine Biology 113: 373-377.
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Genetic structure of giant clam (Tridacna maxima) populations from reefs in the western Coral Sea: Benzie JAH and Williams ST (1992) Genetic structure of giant clam (Tridacna maxima) populations from reefs in the western Coral Sea. Coral Reefs 11: 135-141.
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