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

Throughout the animal kingdom, rival males routinely challenge one another for the right to reproduce. From the head-on collisions between bighorn rams to the ritualized wrestling matches of male rattlesnakes, combat is often the key to reproductive success.

But now scientists studying a species of African cichlid fish have discovered that low-ranking male cichlids can quickly become leading men without even putting up a fight. In fact, a drab subordinate male cichlid will begin But But now scientists studying a species of African cichlid fish have discovered that low-ranking male cichlids can quickly become leading men without even putting up a fight. In fact, a drab subordinate male cichlid will begin physically transforming into a colorful dominant male as soon as he notices that his competition is no longer around, according to a new study conducted at Stanford University.

"We show for the first time that subordinate males can become dominant within minutes of an opportunity to do so, displaying dramatic changes in body coloration and behavior," write neurobiologists Sabrina Burmeister, Erich Jarvis and Russell Fernald, co-authors of the study published in the Oct. 17 edition of the journal PloS Biology. During this radical makeover, the low-ranking male undergoes a rapid metamorphosis. His body color changes from dull gray to flashy blue or yellow, and a prominent black stripe ("eyebar") appears across his face. This physical transformation signals to males and females alike that he's the top fish now and will vigorously defend his newly acquired breeding grounds.

"We found that when the dominating male is removed, the subordinate male perceives an opportunity to advance in social status and responds both behaviorally and by turning on genes that ultimately make him capable of reproducing," notes Fernald, the Benjamin Scott Crocker Professor of Human Biology at Stanford. This finding offers the first direct evidence that changes in s
'"/>

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:7/24/2014)... counterparts in humans, affect the connections between nerve cells ... hippocampus, an area of the brain that plays a ... memories. The results of the study have been published ... depends on the active communication between nerve cells, known ... into a dense network where they constantly relay signals ...
(Date:7/24/2014)... fire hazard in the United States, wildland managers often ... and suppressed trees (ladder fuels). These cuttings and ... low fire danger in order to dispose of the ... pollutants, managers often cover all or part of the ... as agricultural plastic, in order to keep water out. ...
(Date:7/24/2014)... the potato genes that best adapt to the anticipated ... and increased extremes of hot and cold temperatures.The aim ... to create new potato varieties that will adapt optimally ... find out how the current potato varieties will behave ... lower temperatures. , This research is part of the ...
Breaking Biology News(10 mins):A protein couple controls flow of information into the brain's memory center 2A protein couple controls flow of information into the brain's memory center 3A protein couple controls flow of information into the brain's memory center 4Study gives new perspective on agricultural plastic, debris burning, and air quality 2Neiker-Tecnalia is researching the potato genes that best adapt to climate change 2
... pre-existing malaria prevents secondary infection by another Plasmodium strain, ... in the liver of the host. This discovery will ... Medicine and has important implications for the management ... of individuals worldwide. The study was developed by ...
... The Scripps Research Institute have identified a class of compounds ... discovery. In a new study, published online in ... researchers show the new compounds powerfully and selectively block the ... as "serine hydrolases." Previously discovered serine hydrolase-blocking compounds have been ...
... May 15, 2011) An international research team led ... for Breast Cancer Research at Princess Margaret Hospital (PMH), ... process whereby tumour cells adapt and survive under conditions ... today in Genes and Development ( http://www.genesdev.org/cgi/doi/10.1101/gad.1987211 ...
Cached Biology News:Malaria against malaria: A pre-existing malaria infection can prevent a second infection 2Malaria against malaria: A pre-existing malaria infection can prevent a second infection 3Scientists find new class of compounds with great potential for research and drug development 2Scientists find new class of compounds with great potential for research and drug development 3Cancer scientists discover new way breast cancer cells adapt to environmental stress 2
(Date:7/24/2014)... July 24, 2014 Research and Markets ... Genomics and Proteomics Analytical Instruments Market 2014-2018" report ... Genomics is the study of the ... of the structure and functions of proteomes or sets ... and technology. Genomics involves the mapping of genes and ...
(Date:7/24/2014)... Three companies from the angelMD network were ... Competition. Out of 700 competition entrants, Chiron Health, Litesprite, ... round. In this round twenty teams are invited to ... mentoring from thought-leaders and medical entrepreneurs from all over ... commitment to the Livestrong vision around the Big C ...
(Date:7/24/2014)... 24, 2014 1000 balances – 4 ... on customers’ weighing needs and expertly narrows down the ... balances, scales or even terminals. , First, select ... weight (or select readability instead) and define the accuracy ... selection criteria narrows down the list to models that ...
(Date:7/24/2014)... DIEGO , July 24, 2014   ... announced today the appointment of Adam Simpson ... Cypher Genomics provides rapid and comprehensive annotation and ... and clinical reporting. "Cypher,s technology has ... improve healthcare by enhancing diagnostic accuracy, optimizing therapeutic ...
Breaking Biology Technology:Global Genomics and Proteomics Analytical Instruments Market 2014-2018: Key Vendors are Agilent, Bio-Rad , F. Hoffmann, La Roche, Illumina, PerkinElmer and Thermo Fisher Scientific 23 angelMD Startups Make Livestrong Big C Semi-finals 2Cypher Genomics Announces the Appointment of Adam Simpson as President and COO to Advance Transformative Genome Interpretation Technology 2Cypher Genomics Announces the Appointment of Adam Simpson as President and COO to Advance Transformative Genome Interpretation Technology 3
... into the Cisco Open Platform for Safety and Security; ... ... Employees, and Citizens, MORGANTOWN, W.Va., April 1, 2008 ... it,has partnered with Cisco on the newly launched Cisco Open ...
... HILTON HEAD ISLAND, S.C., April 1 Dr. Roger ... and founder and,chairman of the not-for-profit public charity CureHIV.us, ... community, including funding,initiatives such as the Grand Challenges in ... clinical studies of a new drug and treatment,method, LiSAVIOR., ...
... Revenue and Positive ... for Three Consecutive Quarters, PRINCETON, N.J., April 1 ... company, today,announced record growth in revenues for 2007. The company ... generated positive EBITDA for,the third consecutive quarter. Laureate achieved other ...
Cached Biology Technology:Augusta Systems Technologies Integrated into Cisco's Newly Launched Safety and Security Platform 2Augusta Systems Technologies Integrated into Cisco's Newly Launched Safety and Security Platform 3Cure HIV Reaches Out to Foundation Community to Fund LiSAVIOR 2Laureate Pharma Reports Record Growth for 2007 2Laureate Pharma Reports Record Growth for 2007 3
... Model SPD131DDA , Our most chemically resistant ... to handle the rigors and solvents of Combinatorial ... display, dual independent timers, an automatic bleeder valve ... pathway. , , Adjustable Vacuum Level ...
... Affiliation: School of Psychology, The University of New ... University of Technology, Perth, Australia This is the ... rat brain. It is a large ... extension of the compact 3rd edition. This ...
... RC10 series of vacuum concentrators/centrifugal evaporators offers ... allied to rapid and safe concentration of ... combined with oil-free or high vacuum pumps, ... wide selection of rotors (eliminating sample loss ...
... is Thermo Electron's most advanced personal gradient ... to use sophisticated onboard software and a ... to offer performance, accuracy and simplicity in ... of customer driven features built up on ...
Biology Products: