Navigation Links
Fish go mad for ginger gene
Date:9/28/2009

There may be plenty of fish in the sea but the medaka knows what it likes. A new study published in the open access journal BMC Biology shows how a single gene mutation that turns Japanese Killifish a drab grey colour renders them significantly less attractive to more colourful members of the opposite sex.

The medaka, found commonly in Southeast Asia, can be observed in a wide range of colours; from brown, to more uncommon orange and grey variations. Shoji Fukamachi led a team of researchers from the University of Konstanz, Germany and the University of Tokyo, who studied the effects of alterations in a colour-determining gene on mating preferences of the fish.

According to Fukamachi "We observed that the grey medaka were often rejected in favour of their brown or orange rivals. This is the first demonstration of a single gene that can change both secondary sexual characteristics and mating preferences".

The greys, however, need not be completely despondent at these findings, as the study also showed that they were preferentially selective for each other.

Orange colour in medaka is determined by the presence of pigmented structures known as xanthophores, and these are reduced in the grey fish carrying the mutant gene. By over-expressing this same gene, the researchers created super attractive bright orange medaka that induced hyperactivity in similarly engineered members of the opposite sex while other potential mates were ignored almost completely.

"Thus, the present finding of the xanthophore-dependent mate choice enables many ingenious experiments to be designed in this and other fish species" said Fukamachi, adding, "This discovery should further facilitate molecular dissection/manipulation of visual-based mate choice".

The strong like-for-like colour preference of medaka mating, suggests that sympatric speciation could occur as reproductive isolation follows colour switches due to mutations in this colour-determining gene.


'/>"/>

Contact: Graeme Baldwin
graeme.baldwin@biomedcentral.com
44-203-192-2165
BioMed Central
Source:Eurekalert  

Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Fish go mad for ginger gene
(Date:4/11/2017)... April 11, 2017 Crossmatch®, a globally-recognized ... solutions, today announced that it has been awarded ... Projects Activity (IARPA) to develop next-generation Presentation Attack ... "Innovation has been a driving force within ... will allow us to innovate and develop new ...
(Date:4/11/2017)... 11, 2017 NXT-ID, Inc. (NASDAQ:   ... announces the appointment of independent Directors Mr. Robin D. ... Board of Directors, furthering the company,s corporate governance and expertise. ... Gino Pereira , ... forward to their guidance and benefiting from their considerable expertise ...
(Date:4/5/2017)... , April 5, 2017 Today HYPR ... that the server component of the HYPR platform is ... providing the end-to-end security architecture that empowers biometric authentication ... HYPR has already secured over 15 million users across ... manufacturers of connected home product suites and physical access ...
Breaking Biology News(10 mins):
(Date:9/19/2017)... ... September 19, 2017 , ... ... Services (NYS DFS) cybersecurity regulations have transitioned into full force and ... operating in the state (“Covered Entities”) to conduct an annual, professional, comprehensive ...
(Date:9/18/2017)... ... September 18, 2017 , ... ... the move of the SPIE Digital Library ( http://www.spiedigitallibrary.org ) on 15 August ... create an improved user experience and incorporate a number of enhancements and new ...
(Date:9/17/2017)... ... , ... GeneOne Life Science, Inc. announces that it has ... for an Investigational New Drug application for a Phase I/IIa study of its ... in Korea represents the second clinical trial for GLS-5300. , A US ...
(Date:9/14/2017)... Philadelphia PA and London UK (PRWEB) , ... ... ... company, will gather the most innovative minds in pharma and biotech at the ... is a two-day collaborative conference that brings together the world’s most progressive clinical ...
Breaking Biology Technology: