Navigation Links
Adaptation to parasites drive African fishes along different evolutionary paths
Date:8/15/2007

Quebec City, Canada - An international team of scientists from Canada (Universit Laval), the U.K. (University of Hull, Cardiff University) and Spain (Do ana Biological Station), have discovered that a pair of closely related species of East African cichlid fishes a group of fish whose diversity comprising hundreds of species has puzzled evolutionary biologists for decades evolved divergent immune gene adaptations which might explain why they do not interbreed, despite living side by side.

The two species ( Pseudotropheus emmiltos and Pseudotropheus fainzilberi ) are found in the north western part of Lake Malawi. Until now, the only known difference between them was the color of their dorsal fin. Many researchers believe that African cichlids recognize conspecifics from these kinds of colour differences, which are thought to result from sexual selection. However, recent mate choice experiments have shown that female P. emmiltos recognize males of their own species from P. fainzilberi males based on olfactory communication rather than color.

Some of the genes known to influence mating behavior through olfaction in other vertebrate species are genes of the major histocompatibility complex (MHC). These genes code for receptor that bound molecules produced by infectious agents and present them to specialized cells of the immune system which then launch an immune attack on the microbes. They are the most diverse genes found in vertebrate genomes and individuals of some species, including humans, are able to "smell" other individuals variability at these genes and adjust their mate choice in order to optimize the effectiveness of their offspring's immune system. Analysis of MHC genes between P. emmiltos and P. fainzilberi revealed that the two species were genetically more different at these sites involved in contacting and presenting molecules to immune cells than at other sites of the gene's DNA sequence that do not play functional roles.'/>"/>

Contact: Jonatan Blais
jonatan.blais.1@ulaval.ca
418-656-213-18455
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. 15 generations of untrained jocks, couch potatoes show big physiological adaptations
2. Otter adaptations: How do otters remain sleek and warm
3. Protein offers way to stop microscopic parasites in their tracks
4. Measuring hidden parasites in falciparum malaria
5. Researchers at UGA provide first look at protein expression in Chagas disease-causing parasites
6. Malaria parasites develop in lymph nodes
7. How healthy is that marsh? Biologists count parasites
8. Bacterial protein shows promise in treating intestinal parasites
9. Hopkins scientists link immune response to ghost parasites and severely congested sinuses
10. Parasites impact goes beyond host to affect ecosystem
11. Scientists identify molecular events that drive cell senescence
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/29/2014)... some surprising discoveries about the body,s initial responses ... the team found that specialized cells in the ... viral invasion and are the source of gut ... (IL-1β). , Though aimed at the presence ... epithelium that provides a barrier to protect the ...
(Date:8/29/2014)... over the last 120,000 years may have influenced ... researchers led by City College of New York ... metric called "phylogeographic endemism." , It quantifies the ... is restricted in geographical space. , Dr. Carnaval, ... researchers from institutions in Brazil, Australia and the ...
(Date:8/29/2014)... prolific bloomer Emiliania huxleyi , can grow without ... contradicts the common view that E. huxleyi ... of thiamine in the ocean to survive. , "It,s ... says CIFAR Senior Fellow Alexandra Worden , co-author ... fellows John Archibald (Dalhousie University), Adrin ...
Breaking Biology News(10 mins):The early cost of HIV 2CCNY team defines new biodiversity metric 2Not all phytoplankton in the ocean need to take their vitamins 2Not all phytoplankton in the ocean need to take their vitamins 3
... Fingerprinting for Kids" event on April 18 at ... CHESAPEAKE, Va., April 2 Turner Network Sales ... System, Inc. (TBS, Inc.), and truTV, are partnering with Cox ... "Digital Fingerprinting for Kids" event , a service designed ...
... Wins Gold Innovation Award; Senior Scientist Dr. Caleb ... Receives Certificate of RecognitionBOSTON, April 6 ... revolutionary biometric media research firm specializing in Emotional ... Awards from the Advertising Research Foundation.The Innovation Awards, ...
... Aware, Inc. (Nasdaq: AWRE ), a ... announced the preliminary results of its modified Dutch Auction ... City time, on Friday, April 17, 2009.In accordance with ... based on the preliminary count by Computershare Trust Company, ...
Cached Biology News:truTV and Cox Offer Free Digital Fingerprinting to Help Prevent Crimes Against Children 2truTV and Cox Offer Free Digital Fingerprinting to Help Prevent Crimes Against Children 3Innerscope Research(R) Receives Three Great Minds Innovation Awards from the Advertising Research Foundation 2Aware, Inc. Announces Preliminary Results of Dutch Auction Tender Offer 2Aware, Inc. Announces Preliminary Results of Dutch Auction Tender Offer 3
(Date:9/2/2014)... 2, 2014  Synthetic Biologics, Inc. (NYSE MKT: ... drug candidates targeting specific pathogens that cause serious ... its final preclinical toxicology study of SYN-004. Per ... bridging study was required to move the Company,s ... the devastating effects of Clostridium difficile (C. ...
(Date:9/2/2014)... 2, 2014 Culot brings life ... lab management services  BioData, producer of Labguru, ... to announce the appointment of Louis Culot ... as VP Marketing and Business Development at BioDiscovery Inc., ... clinical applications. Previously, Culot worked for 17 ...
(Date:9/1/2014)... The Collaborative R&D Terms and ... comprehensive understanding and unprecedented access to the collaborative ... worlds leading life science companies. , The report ... and why companies enter collaborative R&D deals. , ... deals terms provides critical insight into the negotiation ...
(Date:8/31/2014)... August 31, 2014 This is ... state of the Epoxy Hardener industry in ... overview of the industry, including definitions, applications and ... domestic market analysis are provided with a focus ... the market. A comparison between the international and ...
Breaking Biology Technology:Synthetic Biologics to Initiate Clinical Trials of SYN-004 in 4Q 2014 to Prevent Potentially Deadly C. difficile Infections 2Synthetic Biologics to Initiate Clinical Trials of SYN-004 in 4Q 2014 to Prevent Potentially Deadly C. difficile Infections 3Synthetic Biologics to Initiate Clinical Trials of SYN-004 in 4Q 2014 to Prevent Potentially Deadly C. difficile Infections 4Synthetic Biologics to Initiate Clinical Trials of SYN-004 in 4Q 2014 to Prevent Potentially Deadly C. difficile Infections 5Louis Culot Appointed as BioData's CEO 2Collaborative R&D Terms & Agreements in Pharma, Biotech and Diagnostics Industry Analysis, Size, Share, Growth, Trends And Forecast Research Report by Researchmoz.us 2Collaborative R&D Terms & Agreements in Pharma, Biotech and Diagnostics Industry Analysis, Size, Share, Growth, Trends And Forecast Research Report by Researchmoz.us 3Collaborative R&D Terms & Agreements in Pharma, Biotech and Diagnostics Industry Analysis, Size, Share, Growth, Trends And Forecast Research Report by Researchmoz.us 4Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 2Epoxy Hardener Industry Development Trends in Global & China Regions Now Available at ReportsnReports.com 3
... MEDdevice Acquisition Co., LLC,MDAC is proud to announce that ... experience and proven success optimizing investments in,the medical device ... announced include:, Tony Dimun, CEO of Nascent Enterprises, ... Larry Gold, PhD, Chairman and CEO of SomaLogic ...
... May 14 Biodel Inc. (Nasdaq:,BIOD) today announced that ... and Treasurer of Biodel, will present a,corporate update at ... May 22, 2008 at 1:00 p.m. Eastern Time. The,conference ... New York, New York., Interested parties may access ...
... Company employees in nearly 50 nations are rolling up ... celebration of Lilly,s,first-ever Global Day of Service, possibly the ... day., Beginning at sunrise in New Zealand, Lilly ... energy to improve the health and,well-being of communities around ...
Cached Biology Technology:MEDdevice Acquisition Co., LLC Announces Board Members and Advisors 2Lilly Employees from Nearly 50 Nations Participate in Company's First-Ever Global Day of Service 2
... (MUC3) is a glycoprotein. distributed in ... extent in breast, lung and salivary gland ... cross-reaction with MUC1 and MUC2. ... Immunogen: MUC3 tandem repeat peptide ...
... bottoms,• Nonreversible lids with ... contamination,• Individual alphanumerical codes ... footprint for ease in ... cell attachment,• Sterilized by ...
Rabbit polyclonal to GABA A Receptor gamma 2 ( Abpromise for all tested applications). entrezGeneID: 2566 SwissProtID: P18507...
Rabbit polyclonal to VPAC2 ( Abpromise for all tested applications). entrezGeneID: 7434 SwissProtID: P41587...
Biology Products: