Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds
Abstract Genetic differentiation is generally assumed to be low in highly mobile species, but this simplistic view may obscure the complex conditions and mechanisms allowing genetic exchanges between specific populations. Here, we combined data from satellite‐tracked migratory caribou ( Rangifer tar...
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crwiley:10.1111/j.1365-294x.2007.03476.x 2024-06-02T08:13:38+00:00 Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds BOULET, MARYLÈNE COUTURIER, SERGE CÔTÉ, STEEVE D. OTTO, ROBERT D. BERNATCHEZ, LOUIS 2007 http://dx.doi.org/10.1111/j.1365-294x.2007.03476.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2007.03476.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2007.03476.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Molecular Ecology volume 16, issue 20, page 4223-4240 ISSN 0962-1083 1365-294X journal-article 2007 crwiley https://doi.org/10.1111/j.1365-294x.2007.03476.x 2024-05-03T10:43:36Z Abstract Genetic differentiation is generally assumed to be low in highly mobile species, but this simplistic view may obscure the complex conditions and mechanisms allowing genetic exchanges between specific populations. Here, we combined data from satellite‐tracked migratory caribou ( Rangifer tarandus ), microsatellite markers, and demographic simulations to investigate gene flow mechanisms between seven caribou herds of eastern Canada. Our study included one montane, two migratory, and four sedentary herds. Satellite‐tracking data indicated possibilities of high gene flow between migratory herds: overlap of their rutting ranges averaged 10% across years and 9.4% of females switched calving sites at least once in their lifetime. Some migratory individuals moved into the range of the sedentary herds, suggesting possibilities of gene flow between these herds. Genetic differentiation between herds was weak but significant ( F ST = 0.015): migratory and montane herds were not significantly distinct ( F ST all ≤ 0.005), whereas sedentary herds were more differentiated ( F ST = 0.018–0.048). Geographical distances among sedentary herds limited gene flow. Historical estimates of gene flow were higher from migratory herds into sedentary herds (4 Nm all > 9) than vice‐versa (4 Nm all < 5), which suggests migratory herds had a demographic impact on sedentary herds. Demographic simulations showed that an effective immigration rate of 0.0005 was sufficient to obtain the empirical F ST of 0.015, while a null immigration rate increased the simulated F ST to > 0.6. In conclusion, the weak genetic differentiation between herds cannot be obtained without some genetic exchanges among herds, as demonstrated by genetic and spatial data. Article in Journal/Newspaper Rangifer tarandus Wiley Online Library Canada Molecular Ecology 16 20 4223 4240 |
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Wiley Online Library |
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English |
description |
Abstract Genetic differentiation is generally assumed to be low in highly mobile species, but this simplistic view may obscure the complex conditions and mechanisms allowing genetic exchanges between specific populations. Here, we combined data from satellite‐tracked migratory caribou ( Rangifer tarandus ), microsatellite markers, and demographic simulations to investigate gene flow mechanisms between seven caribou herds of eastern Canada. Our study included one montane, two migratory, and four sedentary herds. Satellite‐tracking data indicated possibilities of high gene flow between migratory herds: overlap of their rutting ranges averaged 10% across years and 9.4% of females switched calving sites at least once in their lifetime. Some migratory individuals moved into the range of the sedentary herds, suggesting possibilities of gene flow between these herds. Genetic differentiation between herds was weak but significant ( F ST = 0.015): migratory and montane herds were not significantly distinct ( F ST all ≤ 0.005), whereas sedentary herds were more differentiated ( F ST = 0.018–0.048). Geographical distances among sedentary herds limited gene flow. Historical estimates of gene flow were higher from migratory herds into sedentary herds (4 Nm all > 9) than vice‐versa (4 Nm all < 5), which suggests migratory herds had a demographic impact on sedentary herds. Demographic simulations showed that an effective immigration rate of 0.0005 was sufficient to obtain the empirical F ST of 0.015, while a null immigration rate increased the simulated F ST to > 0.6. In conclusion, the weak genetic differentiation between herds cannot be obtained without some genetic exchanges among herds, as demonstrated by genetic and spatial data. |
format |
Article in Journal/Newspaper |
author |
BOULET, MARYLÈNE COUTURIER, SERGE CÔTÉ, STEEVE D. OTTO, ROBERT D. BERNATCHEZ, LOUIS |
spellingShingle |
BOULET, MARYLÈNE COUTURIER, SERGE CÔTÉ, STEEVE D. OTTO, ROBERT D. BERNATCHEZ, LOUIS Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
author_facet |
BOULET, MARYLÈNE COUTURIER, SERGE CÔTÉ, STEEVE D. OTTO, ROBERT D. BERNATCHEZ, LOUIS |
author_sort |
BOULET, MARYLÈNE |
title |
Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
title_short |
Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
title_full |
Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
title_fullStr |
Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
title_full_unstemmed |
Integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
title_sort |
integrative use of spatial, genetic, and demographic analyses for investigating genetic connectivity between migratory, montane, and sedentary caribou herds |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1365-294x.2007.03476.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-294X.2007.03476.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-294X.2007.03476.x |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Rangifer tarandus |
genre_facet |
Rangifer tarandus |
op_source |
Molecular Ecology volume 16, issue 20, page 4223-4240 ISSN 0962-1083 1365-294X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-294x.2007.03476.x |
container_title |
Molecular Ecology |
container_volume |
16 |
container_issue |
20 |
container_start_page |
4223 |
op_container_end_page |
4240 |
_version_ |
1800737213375315968 |