Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus
In planktonic dispersers, impediments to dispersal, local selection or large variance in the reproductive success among individuals (sweepstakes reproductive success) can create genetic heterogeneity at local scales. While these processes are well recognized, relatively few studies have investigated...
| Main Authors: | , , , , |
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| Format: | Journal Article |
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Inter-Research
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/13421 |
| _version_ | 1848748342822043648 |
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| author | Kennington, W. Berry, O. Groth, David Johnson, M. Melville-Smith, Roy |
| author_facet | Kennington, W. Berry, O. Groth, David Johnson, M. Melville-Smith, Roy |
| author_sort | Kennington, W. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In planktonic dispersers, impediments to dispersal, local selection or large variance in the reproductive success among individuals (sweepstakes reproductive success) can create genetic heterogeneity at local scales. While these processes are well recognized, relatively few studies have investigated the spatial scales over which genetic heterogeneity occurs and how it is distributed across species’ ranges. We investigate population structure in the western rock lobster Panulirus cygnus, a commercially exploited species found in shallow and deep-water reef habitats along the Western Australia coastline. We screened 631 individuals from 9 locations across the species’ range for genetic variation at 22 microsatellite loci. Consistent with expectations of extensive larval mixing during an extended planktonic stage, we found no significant genetic differentiation among locations (FST = 0.003, G’’ST = 0.007). Despite the lack of large-scale geographic structure, small but significant positive spatial autocorrelation (SA) was detected over distances up to 40 km. Two-dimensional local SA analysis confirmed that fine-scale genetic heterogeneity was common throughout the species’ range. An intriguing aspect of these results is that SA was based on juvenile and adult lobsters, suggesting restricted movement or spatial cohesion of individuals after settlement. |
| first_indexed | 2025-11-14T07:03:31Z |
| format | Journal Article |
| id | curtin-20.500.11937-13421 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:03:31Z |
| publishDate | 2013 |
| publisher | Inter-Research |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-134212017-09-13T14:58:45Z Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus Kennington, W. Berry, O. Groth, David Johnson, M. Melville-Smith, Roy Sweepstakes reproductive success Microsatellites Western rock lobster Population structure Genetic variation In planktonic dispersers, impediments to dispersal, local selection or large variance in the reproductive success among individuals (sweepstakes reproductive success) can create genetic heterogeneity at local scales. While these processes are well recognized, relatively few studies have investigated the spatial scales over which genetic heterogeneity occurs and how it is distributed across species’ ranges. We investigate population structure in the western rock lobster Panulirus cygnus, a commercially exploited species found in shallow and deep-water reef habitats along the Western Australia coastline. We screened 631 individuals from 9 locations across the species’ range for genetic variation at 22 microsatellite loci. Consistent with expectations of extensive larval mixing during an extended planktonic stage, we found no significant genetic differentiation among locations (FST = 0.003, G’’ST = 0.007). Despite the lack of large-scale geographic structure, small but significant positive spatial autocorrelation (SA) was detected over distances up to 40 km. Two-dimensional local SA analysis confirmed that fine-scale genetic heterogeneity was common throughout the species’ range. An intriguing aspect of these results is that SA was based on juvenile and adult lobsters, suggesting restricted movement or spatial cohesion of individuals after settlement. 2013 Journal Article http://hdl.handle.net/20.500.11937/13421 10.3354/meps10360 Inter-Research fulltext |
| spellingShingle | Sweepstakes reproductive success Microsatellites Western rock lobster Population structure Genetic variation Kennington, W. Berry, O. Groth, David Johnson, M. Melville-Smith, Roy Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus |
| title | Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus |
| title_full | Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus |
| title_fullStr | Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus |
| title_full_unstemmed | Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus |
| title_short | Spatial scales of genetic patchiness in the western rock lobster Panulirus cygnus |
| title_sort | spatial scales of genetic patchiness in the western rock lobster panulirus cygnus |
| topic | Sweepstakes reproductive success Microsatellites Western rock lobster Population structure Genetic variation |
| url | http://hdl.handle.net/20.500.11937/13421 |