Alternative life histories shape brain gene expression profiles in males of the same population
Atlantic salmon (Salmo salar) undergo spectacular marine migrations before homing to spawn in natal rivers. However, males that grow fastest early in life can adopt an alternative ‘sneaker’ tactic by maturing earlier at greatly reduced size without leaving freshwater. While the ultimate evolutionary...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
---|---|
Main Authors: | , , , |
Format: | Text |
Language: | English |
Published: |
The Royal Society
2005
|
Subjects: | |
Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1559854 http://www.ncbi.nlm.nih.gov/pubmed/16087419 https://doi.org/10.1098/rspb.2005.3125 |
id |
ftpubmed:oai:pubmedcentral.nih.gov:1559854 |
---|---|
record_format |
openpolar |
spelling |
ftpubmed:oai:pubmedcentral.nih.gov:1559854 2023-05-15T15:32:30+02:00 Alternative life histories shape brain gene expression profiles in males of the same population Aubin-Horth, Nadia Landry, Christian R Letcher, Benjamin H Hofmann, Hans A 2005-07-14 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1559854 http://www.ncbi.nlm.nih.gov/pubmed/16087419 https://doi.org/10.1098/rspb.2005.3125 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1559854 http://www.ncbi.nlm.nih.gov/pubmed/16087419 http://dx.doi.org/10.1098/rspb.2005.3125 © 2005 The Royal Society Research Article Text 2005 ftpubmed https://doi.org/10.1098/rspb.2005.3125 2013-08-31T06:18:25Z Atlantic salmon (Salmo salar) undergo spectacular marine migrations before homing to spawn in natal rivers. However, males that grow fastest early in life can adopt an alternative ‘sneaker’ tactic by maturing earlier at greatly reduced size without leaving freshwater. While the ultimate evolutionary causes have been well studied, virtually nothing is known about the molecular bases of this developmental plasticity. We investigate the nature and extent of coordinated molecular changes that accompany such a fundamental transformation by comparing the brain transcription profiles of wild mature sneaker males to age-matched immature males (future large anadromous males) and immature females. Of the ca. 3000 genes surveyed, 15% are differentially expressed in the brains of the two male types. These genes are involved in a wide range of processes, including growth, reproduction and neural plasticity. Interestingly, despite the potential for wide variation in gene expression profiles among individuals sampled in nature, consistent patterns of gene expression were found for individuals of the same reproductive tactic. Notably, gene expression patterns in immature males were different both from immature females and sneakers, indicating that delayed maturation and sea migration by immature males, the ‘default’ life cycle, may actually result from an active inhibition of development into a sneaker. Text Atlantic salmon Salmo salar PubMed Central (PMC) Proceedings of the Royal Society B: Biological Sciences 272 1573 1655 1662 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Research Article |
spellingShingle |
Research Article Aubin-Horth, Nadia Landry, Christian R Letcher, Benjamin H Hofmann, Hans A Alternative life histories shape brain gene expression profiles in males of the same population |
topic_facet |
Research Article |
description |
Atlantic salmon (Salmo salar) undergo spectacular marine migrations before homing to spawn in natal rivers. However, males that grow fastest early in life can adopt an alternative ‘sneaker’ tactic by maturing earlier at greatly reduced size without leaving freshwater. While the ultimate evolutionary causes have been well studied, virtually nothing is known about the molecular bases of this developmental plasticity. We investigate the nature and extent of coordinated molecular changes that accompany such a fundamental transformation by comparing the brain transcription profiles of wild mature sneaker males to age-matched immature males (future large anadromous males) and immature females. Of the ca. 3000 genes surveyed, 15% are differentially expressed in the brains of the two male types. These genes are involved in a wide range of processes, including growth, reproduction and neural plasticity. Interestingly, despite the potential for wide variation in gene expression profiles among individuals sampled in nature, consistent patterns of gene expression were found for individuals of the same reproductive tactic. Notably, gene expression patterns in immature males were different both from immature females and sneakers, indicating that delayed maturation and sea migration by immature males, the ‘default’ life cycle, may actually result from an active inhibition of development into a sneaker. |
format |
Text |
author |
Aubin-Horth, Nadia Landry, Christian R Letcher, Benjamin H Hofmann, Hans A |
author_facet |
Aubin-Horth, Nadia Landry, Christian R Letcher, Benjamin H Hofmann, Hans A |
author_sort |
Aubin-Horth, Nadia |
title |
Alternative life histories shape brain gene expression profiles in males of the same population |
title_short |
Alternative life histories shape brain gene expression profiles in males of the same population |
title_full |
Alternative life histories shape brain gene expression profiles in males of the same population |
title_fullStr |
Alternative life histories shape brain gene expression profiles in males of the same population |
title_full_unstemmed |
Alternative life histories shape brain gene expression profiles in males of the same population |
title_sort |
alternative life histories shape brain gene expression profiles in males of the same population |
publisher |
The Royal Society |
publishDate |
2005 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1559854 http://www.ncbi.nlm.nih.gov/pubmed/16087419 https://doi.org/10.1098/rspb.2005.3125 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1559854 http://www.ncbi.nlm.nih.gov/pubmed/16087419 http://dx.doi.org/10.1098/rspb.2005.3125 |
op_rights |
© 2005 The Royal Society |
op_doi |
https://doi.org/10.1098/rspb.2005.3125 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
272 |
container_issue |
1573 |
container_start_page |
1655 |
op_container_end_page |
1662 |
_version_ |
1766362991045902336 |