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:11/28/2016)... 2016 "The biometric system ... The biometric system market is in the growth ... near future. The biometric system market is expected to ... a CAGR of 16.79% between 2016 and 2022. Government ... technology in smartphones, rising use of biometric technology in ...
(Date:11/22/2016)... According to the new market research report "Biometric System Market ... Multi-Factor), Component (Hardware and Software), Function (Contact and Non-contact), Application, and Region ... to grow from USD 10.74 Billion in 2015 to reach USD 32.73 ... Continue Reading ... ...
(Date:11/21/2016)... Nov. 21, 2016   Neurotechnology , a ... technologies, today announced that the MegaMatcher On Card ... submitted for the NIST Minutiae Interoperability Exchange ... the mandatory steps of the evaluation protocol. ... continuing test of fingerprint templates used to establish ...
Breaking Biology News(10 mins):
(Date:12/7/2016)... , Dec. 7, 2016  Biocom, the association for ... the statement below following passage of 21 st Century ... on November 30 by a 392-26 vote and in the ... may be attributed to Joe Panetta , president & ... that will give hope to millions of patients around the ...
(Date:12/7/2016)... ANN ARBOR, Mich. , Dec. 7, ... developing breakthrough immune modulatory medicines, announced today the initiation ... lead therapeutic candidate, LYC-30937- E nteric C oated, ... skin disease that is estimated to affect as many ... , with approximately 1.5 - 3 million cases ...
(Date:12/7/2016)... , ... December 07, 2016 ... ... opening applications to an early access program for SmartBiome -- a novel ... with the simultaneous specific enrichment and detection of hundreds of different genes. ...
(Date:12/6/2016)... ... December 06, 2016 , ... The Osteoarthritis Research ... Federal Drug Administration (FDA) to consider OA as a serious disease. As an ... the growing population of OA patients, many of whom may experience progressive disability ...
Breaking Biology Technology: