Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands
Stomion is a swarm of 13 flightless tenebrionid beetle species endemic to the Galápagos Islands. Their distribution is patchy and largely restricted to the littoral and arid zones of the archipelago. Each taxon is found on one or a few geographically close islands. Thirty-five populations representi...
Published in: | Heredity |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1995
|
Subjects: | |
Online Access: | https://ir.library.carleton.ca/pub/19278 https://doi.org/10.1038/hdy.1995.151 |
id |
ftcarletonunivir:oai:carleton.ca:19278 |
---|---|
record_format |
openpolar |
spelling |
ftcarletonunivir:oai:carleton.ca:19278 2023-05-15T15:55:42+02:00 Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands Finston, T.L. (Terrie L.) Peck, S. (Stewart) 1995-01-01 https://ir.library.carleton.ca/pub/19278 https://doi.org/10.1038/hdy.1995.151 en eng https://ir.library.carleton.ca/pub/19278 doi:10.1038/hdy.1995.151 Heredity vol. 75 no. 4, pp. 390-397 Allozymes Beetles Galápagos Islands Gene flow Population genetics info:eu-repo/semantics/article 1995 ftcarletonunivir https://doi.org/10.1038/hdy.1995.151 2022-02-06T21:50:26Z Stomion is a swarm of 13 flightless tenebrionid beetle species endemic to the Galápagos Islands. Their distribution is patchy and largely restricted to the littoral and arid zones of the archipelago. Each taxon is found on one or a few geographically close islands. Thirty-five populations representing nine of the taxa were examined at eight polymorphic enzyme loci using cellulose acetate electrophoresis to measure patterns of gene flow and investigate models of dispersal in a relatively young species group exhibiting spatially isolated populations. Genetic subdivision is high, particularly among populations of taxa which inhabit more than one island, revealing restricted gene flow and confirming the high potential for reproductive isolation among subpopulations. The mean FST across taxa was 0.30. The genetic differentiation occurring between spatially isolated populations may explain the exuberant speciation of the genus in the Galápagos. Tests of gene flow models give support to the stepping-stone model of dispersal. Because of their lack of flight wings, interisland dispersal of Stomion probably occurred by oceanic drift as pleuston or on floating debris, with individuals colonizing nearby islands more frequently than ones at a greater distance. Article in Journal/Newspaper Close Islands Carleton University's Institutional Repository Close Islands ENVELOPE(144.550,144.550,-67.017,-67.017) Heredity 75 4 390 397 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
Allozymes Beetles Galápagos Islands Gene flow Population genetics |
spellingShingle |
Allozymes Beetles Galápagos Islands Gene flow Population genetics Finston, T.L. (Terrie L.) Peck, S. (Stewart) Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands |
topic_facet |
Allozymes Beetles Galápagos Islands Gene flow Population genetics |
description |
Stomion is a swarm of 13 flightless tenebrionid beetle species endemic to the Galápagos Islands. Their distribution is patchy and largely restricted to the littoral and arid zones of the archipelago. Each taxon is found on one or a few geographically close islands. Thirty-five populations representing nine of the taxa were examined at eight polymorphic enzyme loci using cellulose acetate electrophoresis to measure patterns of gene flow and investigate models of dispersal in a relatively young species group exhibiting spatially isolated populations. Genetic subdivision is high, particularly among populations of taxa which inhabit more than one island, revealing restricted gene flow and confirming the high potential for reproductive isolation among subpopulations. The mean FST across taxa was 0.30. The genetic differentiation occurring between spatially isolated populations may explain the exuberant speciation of the genus in the Galápagos. Tests of gene flow models give support to the stepping-stone model of dispersal. Because of their lack of flight wings, interisland dispersal of Stomion probably occurred by oceanic drift as pleuston or on floating debris, with individuals colonizing nearby islands more frequently than ones at a greater distance. |
format |
Article in Journal/Newspaper |
author |
Finston, T.L. (Terrie L.) Peck, S. (Stewart) |
author_facet |
Finston, T.L. (Terrie L.) Peck, S. (Stewart) |
author_sort |
Finston, T.L. (Terrie L.) |
title |
Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands |
title_short |
Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands |
title_full |
Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands |
title_fullStr |
Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands |
title_full_unstemmed |
Population structure and gene flow in stomion: A species swarm of flightless beetles of the galápagos islands |
title_sort |
population structure and gene flow in stomion: a species swarm of flightless beetles of the galápagos islands |
publishDate |
1995 |
url |
https://ir.library.carleton.ca/pub/19278 https://doi.org/10.1038/hdy.1995.151 |
long_lat |
ENVELOPE(144.550,144.550,-67.017,-67.017) |
geographic |
Close Islands |
geographic_facet |
Close Islands |
genre |
Close Islands |
genre_facet |
Close Islands |
op_source |
Heredity vol. 75 no. 4, pp. 390-397 |
op_relation |
https://ir.library.carleton.ca/pub/19278 doi:10.1038/hdy.1995.151 |
op_doi |
https://doi.org/10.1038/hdy.1995.151 |
container_title |
Heredity |
container_volume |
75 |
container_issue |
4 |
container_start_page |
390 |
op_container_end_page |
397 |
_version_ |
1766391182026342400 |