Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia
Pacific oysters were introduced to Tasmania about 50 years ago from Japan; fears had been expressed that they would have lost genetic variation during their subsequent naturalisation. Using 17 allozyme loci, three hatchery and four naturalised populations of Crassostrea gigas (Thunberg) in Australia...
Published in: | Aquaculture |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Elsevier
2000
|
Subjects: | |
Online Access: | https://doi.org/10.1016/S0044-8486(00)00321-5 http://ecite.utas.edu.au/18490 |
id |
ftunivtasecite:oai:ecite.utas.edu.au:18490 |
---|---|
record_format |
openpolar |
spelling |
ftunivtasecite:oai:ecite.utas.edu.au:18490 2023-05-15T15:57:53+02:00 Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia English, LJ Maguire, GB Ward, RD 2000 https://doi.org/10.1016/S0044-8486(00)00321-5 http://ecite.utas.edu.au/18490 en eng Elsevier http://dx.doi.org/10.1016/S0044-8486(00)00321-5 English, LJ and Maguire, GB and Ward, RD, Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia, Aquaculture, 187, (3-4) pp. 283-298. ISSN 0044-8486 (2000) [Refereed Article] http://ecite.utas.edu.au/18490 Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Refereed Article PeerReviewed 2000 ftunivtasecite https://doi.org/10.1016/S0044-8486(00)00321-5 2019-12-13T21:01:25Z Pacific oysters were introduced to Tasmania about 50 years ago from Japan; fears had been expressed that they would have lost genetic variation during their subsequent naturalisation. Using 17 allozyme loci, three hatchery and four naturalised populations of Crassostrea gigas (Thunberg) in Australia were compared with one another and with two endemic Japanese populations. All populations showed a high degree of genetic variability. The percent of polymorphic loci ranged from an average of 70.6% (hatcheries) through 73.5% (naturalised and Japan). Mean observed heterozygosities ranged from 0.267 (naturalised) through 0.285 (hatcheries) to 0.291 (Japan). Mean numbers of alleles per locus ranged from 3.0 (hatcheries) through 3.3 (naturalised) to 3.5 (Japan). Most loci and populations showed good fits to Hardy-Weinberg expectations; the few significant exceptions were heterozygote deficiencies. Allele-frequency differences among populations were minor, although sometimes statistically significant: only about 1% of the allele frequency variation could be attributed to among-population differences. The introduced oysters appear to have retained most of the genetic variation present in the Japanese populations. (C) 2000 Elsevier Science B.V. Article in Journal/Newspaper Crassostrea gigas Pacific oyster eCite UTAS (University of Tasmania) Pacific Aquaculture 187 3-4 283 298 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
spellingShingle |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture English, LJ Maguire, GB Ward, RD Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
description |
Pacific oysters were introduced to Tasmania about 50 years ago from Japan; fears had been expressed that they would have lost genetic variation during their subsequent naturalisation. Using 17 allozyme loci, three hatchery and four naturalised populations of Crassostrea gigas (Thunberg) in Australia were compared with one another and with two endemic Japanese populations. All populations showed a high degree of genetic variability. The percent of polymorphic loci ranged from an average of 70.6% (hatcheries) through 73.5% (naturalised and Japan). Mean observed heterozygosities ranged from 0.267 (naturalised) through 0.285 (hatcheries) to 0.291 (Japan). Mean numbers of alleles per locus ranged from 3.0 (hatcheries) through 3.3 (naturalised) to 3.5 (Japan). Most loci and populations showed good fits to Hardy-Weinberg expectations; the few significant exceptions were heterozygote deficiencies. Allele-frequency differences among populations were minor, although sometimes statistically significant: only about 1% of the allele frequency variation could be attributed to among-population differences. The introduced oysters appear to have retained most of the genetic variation present in the Japanese populations. (C) 2000 Elsevier Science B.V. |
format |
Article in Journal/Newspaper |
author |
English, LJ Maguire, GB Ward, RD |
author_facet |
English, LJ Maguire, GB Ward, RD |
author_sort |
English, LJ |
title |
Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia |
title_short |
Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia |
title_full |
Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia |
title_fullStr |
Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia |
title_full_unstemmed |
Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia |
title_sort |
genetic variation of wild and hatchery populations of the pacific oyster, crassostrea gigas (thunberg), in australia |
publisher |
Elsevier |
publishDate |
2000 |
url |
https://doi.org/10.1016/S0044-8486(00)00321-5 http://ecite.utas.edu.au/18490 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Crassostrea gigas Pacific oyster |
genre_facet |
Crassostrea gigas Pacific oyster |
op_relation |
http://dx.doi.org/10.1016/S0044-8486(00)00321-5 English, LJ and Maguire, GB and Ward, RD, Genetic variation of wild and hatchery populations of the Pacific oyster, Crassostrea gigas (Thunberg), in Australia, Aquaculture, 187, (3-4) pp. 283-298. ISSN 0044-8486 (2000) [Refereed Article] http://ecite.utas.edu.au/18490 |
op_doi |
https://doi.org/10.1016/S0044-8486(00)00321-5 |
container_title |
Aquaculture |
container_volume |
187 |
container_issue |
3-4 |
container_start_page |
283 |
op_container_end_page |
298 |
_version_ |
1766393590819323904 |