Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands
Two mitochondrial DNA regions and seven microsatellite loci were examined in Patagonian toothfish from three locations in the Southern Ocean (Macquarie Island, five collections; Heard and McDonald Islands, four collections; Shag Rocks/South Georgia area, one collection). Striking mtDNA heterogeneity...
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Online Access: | http://dx.doi.org/10.1017/s0954102002000238 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000238 |
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crcambridgeupr:10.1017/s0954102002000238 2024-03-03T08:39:28+00:00 Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands APPLEYARD, SHARON A. WARD, ROBERT D. WILLIAMS, RICHARD 2002 http://dx.doi.org/10.1017/s0954102002000238 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000238 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 14, issue 4, page 364-373 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2002 crcambridgeupr https://doi.org/10.1017/s0954102002000238 2024-02-08T08:40:25Z Two mitochondrial DNA regions and seven microsatellite loci were examined in Patagonian toothfish from three locations in the Southern Ocean (Macquarie Island, five collections; Heard and McDonald Islands, four collections; Shag Rocks/South Georgia area, one collection). Striking mtDNA heterogeneity was detected between the three fishing locations (F ST =0.445, P <0.001), but spatial and temporal collections within the same location were not significantly different. No significant overall microsatellite differentiation between the three locations was apparent (FST=−0.009, P =0.785). However, some individual loci showed small but significant differentiation, which in each case was attributable to between rather than within-location differentiation. Greater differentiation of mtDNA can, in principle, be explained either by female philopatry and male dispersal, or by its greater sensitivity to changes in effective population size. The latter seems more likely as tagging indicates that toothfish is generally a sedentary species. The genetic heterogeneity between the three locations indicates restricted gene flow, with the fish at each location comprising independent units. Depletion in one location is therefore unlikely to be quickly replaced by immigration from another. Article in Journal/Newspaper Antarctic Science Macquarie Island McDonald Islands Patagonian Toothfish Southern Ocean Cambridge University Press Southern Ocean Heard ENVELOPE(73.510,73.510,-53.117,-53.117) McDonald Islands ENVELOPE(72.600,72.600,-53.033,-53.033) Shag Rocks ENVELOPE(-42.033,-42.033,-53.550,-53.550) Antarctic Science 14 4 364 373 |
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Open Polar |
collection |
Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography APPLEYARD, SHARON A. WARD, ROBERT D. WILLIAMS, RICHARD Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Two mitochondrial DNA regions and seven microsatellite loci were examined in Patagonian toothfish from three locations in the Southern Ocean (Macquarie Island, five collections; Heard and McDonald Islands, four collections; Shag Rocks/South Georgia area, one collection). Striking mtDNA heterogeneity was detected between the three fishing locations (F ST =0.445, P <0.001), but spatial and temporal collections within the same location were not significantly different. No significant overall microsatellite differentiation between the three locations was apparent (FST=−0.009, P =0.785). However, some individual loci showed small but significant differentiation, which in each case was attributable to between rather than within-location differentiation. Greater differentiation of mtDNA can, in principle, be explained either by female philopatry and male dispersal, or by its greater sensitivity to changes in effective population size. The latter seems more likely as tagging indicates that toothfish is generally a sedentary species. The genetic heterogeneity between the three locations indicates restricted gene flow, with the fish at each location comprising independent units. Depletion in one location is therefore unlikely to be quickly replaced by immigration from another. |
format |
Article in Journal/Newspaper |
author |
APPLEYARD, SHARON A. WARD, ROBERT D. WILLIAMS, RICHARD |
author_facet |
APPLEYARD, SHARON A. WARD, ROBERT D. WILLIAMS, RICHARD |
author_sort |
APPLEYARD, SHARON A. |
title |
Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands |
title_short |
Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands |
title_full |
Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands |
title_fullStr |
Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands |
title_full_unstemmed |
Population structure of the Patagonian toothfish around Heard, McDonald and Macquarie Islands |
title_sort |
population structure of the patagonian toothfish around heard, mcdonald and macquarie islands |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1017/s0954102002000238 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102002000238 |
long_lat |
ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(72.600,72.600,-53.033,-53.033) ENVELOPE(-42.033,-42.033,-53.550,-53.550) |
geographic |
Southern Ocean Heard McDonald Islands Shag Rocks |
geographic_facet |
Southern Ocean Heard McDonald Islands Shag Rocks |
genre |
Antarctic Science Macquarie Island McDonald Islands Patagonian Toothfish Southern Ocean |
genre_facet |
Antarctic Science Macquarie Island McDonald Islands Patagonian Toothfish Southern Ocean |
op_source |
Antarctic Science volume 14, issue 4, page 364-373 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102002000238 |
container_title |
Antarctic Science |
container_volume |
14 |
container_issue |
4 |
container_start_page |
364 |
op_container_end_page |
373 |
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1792495021298024448 |