Navigation Links
Sudden change in social status triggers genetic response in male fish, study finds

on and dominant behaviors return. Everyone in the tank accepts this process." Burmeister and her colleagues were the first to observe this diurnal transformation among dominants.

"During the experiment, I would remove the dominant male one hour before the lights came on," she says. "We used this nighttime-kidnap-the-bully approach as a gentle way of not disturbing other fish in the tank."

Burmeister observed that after the lights came on, the subordinate male quickly determined that no dominant rival was in the tank and rapidly began his ascent toward domination. In minutes his coloring changed, his eyebar appeared and he began making threatening displays and chasing other fish. "Once they start changing, there's no question they'll become dominant within 2 to 10 minutes," Burmeister says. "It's like they decide to go for it: They know their place in the hierarchy, and they make a decision to change."

After 20 minutes, the ascending males were sacrificed and their brain cells prepared for laboratory analysis. The researchers wanted to see if they could identify the genes responsible for triggering the ascent to sexual dominance. They were particularly interested in a gene called egr-1, which produces a regulatory protein that activates other genes. The research team hypothesized that, when a male encounters an opportunity to climb the social ladder, the egr-1genes in his brain send an immediate signal to the gonadotropin-releasing hormones cells to start growing. As these cells get bigger, they crank out more and more hormones, transforming the male from doormat to dominant within 10 minutes.

In fact, laboratory analysis confirmed that there was twice as much egr-1 gene expression in the brain cells of ascending cichlids than in either dominant or subordinate males, suggesting that the erg-1 gene plays a crucial role in jumpstarting the whole physical transformation.

"This is the first study where I have seen gene activ
'"/>

Source:Stanford University


Page: 1 2 3 4 5 6

Related biology news :

1. Elusive HIV shape change revealed; Key clue to how virus infects cells
2. Researchers trace evolution to relatively simple genetic changes
3. Plants defy Mendels inheritance laws, may prompt textbook changes
4. Small species back-up giant marsupial climate change extinction claim
5. Africa to take it on chin again with climate change
6. Fox Chase study shows that weakened T-cell receptor signals change T-cell lineage
7. By creating molecular bridge, scientists change function of a protein
8. Logging changed ecological balance for monkeys, damaged health
9. York scientists warn of dramatic impact of climate change on Africa
10. Lands surface change on Alaska tundra creating longer, warmer summers in Arctic
11. New markers of climate change
Post Your Comments:
(Date:7/10/2014)... collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard ... spot, which appears as a red mark, is an ... recognized temperatures higher than background. When accompanied by plumes ... are diagnostic for fire. , This area of ... from the fires, although the smoke released by any ...
(Date:7/10/2014)... ANN ARBOR Because the strong currents in the ... rupture of the oil pipeline beneath the channel would ... and Huron, according to a new University of Michigan ... one scenario examined in the study and accompanying animations, ... and Round Island after 12 hours and Bois Blanc ...
(Date:7/10/2014)... The yellow crazy ant Anoplolepis gracilipes is ranked ... responsible for catastrophic ecological impacts on islands. A new study ... examines and assesses the effects and dangers of the ... of the mature palm forest of the Valle de Mai, ... palm forest of Valle de Mai is a unique ecosystem ...
Breaking Biology News(10 mins):Straits of Mackinac 'worst possible place' for a Great Lakes oil spill 2Straits of Mackinac 'worst possible place' for a Great Lakes oil spill 3Invasion of yellow crazy ant in a Seychelles UNESCO palm forest: Threats and solutions 2
... August 8, 2012 Ben-Gurion University of the Negev ... the Wolfson Family Charitable Trust and Wolfson Foundation for ... environmental impact. According to BGU,s Vice President for ... are part of the University,s overall commitment to research ...
... requires trying many different solutions. That,s true for humans, and ... hyenas, too. The study, published in the current issue ... presented steel puzzle boxes with raw meat inside to wild ... had to slide open a bolt latch. Even though most ...
... much of the year drought has been plaguing American grasslands. ... to be losing the turf war against climate when it ... University-led study looked at the drought tolerance of 426 species ... better understand how grasslands in different parts of the world ...
Cached Biology News:Diversity keeps grasslands resilient to drought, climate change 2Diversity keeps grasslands resilient to drought, climate change 3
(Date:1/15/2014)... RedBrick Health , a fast-growing leader in consumer health ... EmblemHealth , the New York -based ... RedBrick Compass health assessment, combined with the RedBrick Journeys ... EmblemHealth is among the first health plans in the ...
(Date:1/15/2014)... TX (PRWEB) January 15, 2014 More ... disease, and about 1 in 3 seniors will die ... source ). These jaw-dropping figures have shocked many Americans ... and, hopefully, help prevent these tragic age-related cognitive disorders. ...
(Date:1/15/2014)... DTS Language Services, Inc . is pleased to ... Science organizations who need document translations. Clients will now ... documents in advance with a selection of nearly 50 life ... a critical factor in clinical and scientific fields, and decrease ...
(Date:1/15/2014)... (PRWEB) January 15, 2014 AudioNotch is ... new therapy for the treatment of tinnitus. Patients listen ... frequency, and over a period of weeks to months, their ... Therapy in two forms: Notched Music and Notched White Noise. ...
Breaking Biology Technology:EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 2EmblemHealth Selects RedBrick Health to Power its Next-Generation Health Engagement and Behavior Change System 3Biohack Pure Offers 5 Tips for Increasing Memory in 2014 2DTS Improves Efficiency for Life Science Document Translations 2
... April 2 Nuevolution A/S today announced that ... to the second phase of the collaboration agreement ... Chemetics(R) drug discovery technology to identify novel small ... second phase, Merck gains access to a new ...
... China Biologic,Products, Inc. (OTC Bulletin Board: CBPO) ("China Biologic" ... in the People,s,Republic of China ("PRC"), reported financial results ... 2008 Highlights, -- Revenues ... -- Gross profit increased 45.7% to $32.7 ...
... N.Y., April 1 Nutrition 21, Inc. (Nasdaq: ... supplements that help consumers manage blood sugar levels, improve ... announced today that on March 31, 2009 it redeemed ... as required by the terms of these shares. The ...
Cached Biology Technology:Nuevolution Announces Progress in Its Collaboration With Merck & Co. Inc. 2China Biologic Products Announces Strong 2008 Results 2China Biologic Products Announces Strong 2008 Results 3China Biologic Products Announces Strong 2008 Results 4China Biologic Products Announces Strong 2008 Results 5China Biologic Products Announces Strong 2008 Results 6China Biologic Products Announces Strong 2008 Results 7China Biologic Products Announces Strong 2008 Results 8China Biologic Products Announces Strong 2008 Results 9China Biologic Products Announces Strong 2008 Results 10China Biologic Products Announces Strong 2008 Results 11China Biologic Products Announces Strong 2008 Results 12China Biologic Products Announces Strong 2008 Results 13China Biologic Products Announces Strong 2008 Results 14China Biologic Products Announces Strong 2008 Results 15Nutrition 21 Redeems Series I Convertible Preferred Shares 2Nutrition 21 Redeems Series I Convertible Preferred Shares 3
... System creates isogenic cell lines all ... the protein of interest. This homogeneous ... (click link below). In this experiment ... (CAT) was subcloned into pcDNA5/FRT and ...
Fast, sensitive quantitation of total MEK 1/2 concentration....
... for 50 L samples. Operating head automatically rises at the end of determination; triple-point calibration verification; refrigerator ... ... ... ...
SHEEP ANTI ESCHERICHIA COLI...
Biology Products: