HOME >> BIOLOGY >> NEWS
Divergent life history shapes gene expression in brains of salmon

CAMBRIDGE, Mass., July 20, 2005 - Scientists working with salmon have found that gene expression in the brain can differ significantly among members of a species with different life histories. Their study indicates that roughly 15 percent of Atlantic salmon genes show differential expression in males who migrate from their freshwater birthplaces to mature in oceans versus those who do not leave the freshwater environment to mature.

The researchers, at Harvard University, the University of Massachusetts and the US Geological Survey, report the finding in the current issue of Proceedings of the Royal Society B. They compared female salmon, male salmon that will eventually undertake the well-known journey from their river birthplaces to oceans - and then migrate heroically back upstream one to three years later to spawn - and males of the same age known as "sneakers" that mature at greatly reduced size without leaving freshwater.

"The finding that hundreds of the nearly 3,000 genes we studied were expressed differently in the brains of sneakers and other male salmon came as a surprise," says Nadia Aubin-Horth, a postdoctoral researcher in the Bauer Center for Genomics Research in Harvard's Faculty of Arts and Sciences. "Since these males of the same species in the same wild environment differed only in their life history, we did not expect the expression of so many of their genes to differ."

Aubin-Horth and her colleagues were also surprised by some of the 17 separate classes of genes demonstrating differing activity levels.

"It makes sense that growth genes are suppressed in sneakers and genes associated with reproduction are expressed more, since these fish essentially trade bodily size for faster reproductive maturity," she says. "However, it was unexpected, for instance, that genes associated with learning and memory would be expressed at higher levels in the brains of sneakers. It's not yet clear why disparities like this would ari
'"/>

Contact: Steve Bradt
steve_bradt@harvard.edu
617-496-8070
Harvard University
20-Jul-2005


Page: 1 2

Related biology news :

1. Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants
2. What we can learn from the biggest extinction in the history of Earth
3. Biologist traces coconuts history through DNA
4. Colorado River streamflow history reveals megadrought before 1490
5. Book explores history, causes of allergy and asthma epidemic
6. Academy paleontologist and Alaska artist in line for natural history awards
7. Ancient coral reef tells the history of Kenyas soil erosion
8. Microfossils unravel climate history of tropical Africa
9. 500,000 years of climate history stored year by year
10. New study rewrites evolutionary history of vespid wasps
11. Sequencing human history -- The genetics and commerce of personal ancestry

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:7/10/2020)... CHICAGO (PRWEB) , ... July 09, 2020 , ... Today ... Umami Advantage, which will share insight on the “fifth taste” phenomenon that is revolutionizing ... snacks. The Umami Advantage will be live on Monday, July 13, 2020 at11:00 AM ...
(Date:7/1/2020)... ... July 01, 2020 , ... Cure ... for glioblastoma—the most common and aggressive adult brain cancer—announced today the appointments of ... Fellows are charged with supporting the organization’s initiatives and overall vision. , "Senior ...
(Date:6/23/2020)... ... June 23, 2020 , ... ... healthcare, and Renovagen Ltd, a UK supplier and manufacturer of innovative portable renewable ... testing operations in the fight against the COVID-19 pandemic in Zambia. , One ...
Breaking Biology News(10 mins):
(Date:7/31/2020)... FRANCISCO (PRWEB) , ... July ... ... provider of cloud-based software for the life sciences industry, today announced the ... presentation platform designed specifically for Medical Science Liaisons (MSLs) and other field ...
(Date:7/18/2020)... ... July 16, 2020 , ... Medial EarlySign , a ... prevention of high-burden diseases, and Centric Consulting, a business and technology consulting firm, ... existing data in order to identify and prioritize patients for care. , Combining ...
(Date:7/10/2020)... ... July 09, 2020 , ... In ... commonly used to suppress pigment formation in zebrafish embryos, maintaining optical transparency to ... by Dr MA has been using the zebrafish model to investigate the causes ...
(Date:7/1/2020)... , ... June 29, 2020 , ... ... to date growth of 40% in 2020, despite many obstacles created as a ... aims to increase revenue for its partnered medical practices and medical manufacturers by ...
Breaking Biology Technology:
Cached News: