Navigation Links
Gene in male fish lures females into sex
Date:11/14/2007

A gene has been found in male cichlid fish that evolved to lure female fish so that male cichlids can deposit sperm in the females mouths. A study in the online open access journal BMC Biology reveals that the gene is associated with egg-like markings on the fins of cichlid fishes and uncovers the evolutionary history of these markings, which are central to the success of the fishes' exotic oral mating behaviour.

Walter Salzburger, Ingo Braasch and Axel Meyer reared 19 cichlid species at Konstanz University in Germany and identified a gene involved in producing yellow pigment cells in oval spots on the fishes' fins. These markings, known as egg-dummies, are found on the anal fins of the male fish and are crucial to mating. The fish are known as maternal mouthbrooders, because once the female has laid her eggs, she picks them up in her mouth. Attracted by what she takes to be eggs - actually the egg-dummy markings - the female then approaches the male. When the female is close to the anal fin, the male discharges sperm into the female's mouth to fertilize the eggs.

Cichlids are a family of fish that include tilapia and angel fish. There are more than 1,800 cichlid species found only in East Africa, and more than 80% of these belong to a grouping known as the haplochromines, which show the characteristic egg dummies.

The gene that is involved in producing the pigment spot that imitate eggs is called the colony-stimulating factor 1 receptor a (or csf1ra). The researchers also showed that the gene was expressed in the egg-dummies of a distantly related species, in which the spots developed on the pectoral fins rather than the anal fins. "The two kinds of independently evolved egg-dummies serve as a model system to test whether the same genetic pathways are involved in the morphogenesis of both types of dummies," say the authors.


'/>"/>

Contact: Charlotte Webber
press@biomedcentral.com
44-020-763-19980
BioMed Central  
Source:Eurekalert

Page: 1

Related biology news :

1. Why do males and females frequently differ in body size and structure?
2. Vaginal reconstruction not needed for most inter-sex females, Hopkins study shows
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Gene in male fish lures females into sex
(Date:1/6/2017)... 5, 2017  Delta ID Inc., a leader in ... for automotive at CES® 2017. Delta ID has collaborated ... demonstrate the use of iris scanning as a secure, ... driver in a car, and as a way to ... Delta ID and Gentex will demonstrate (booth ...
(Date:12/22/2016)... , Dec. 20, 2016  As part of its longstanding ... leading personal genetics company, recently released its latest children,s book, ... The book focuses on the topics of inheritance and variation ... Standards (NGSS) taught in elementary school classrooms in the US. ... series by illustrator Ariana Killoran , whose previous book ...
(Date:12/19/2016)... , España y TORONTO , 19 de diciembre ... Northern Biologics Inc. que permitirá el desarrollo acelerado de MSC-1, un ... en varios tipos de tumor en 2017, con múltiples sitios previstos ... ... clase con objetivo en el factor inhibidor de leucemia (LIF), una ...
Breaking Biology News(10 mins):
(Date:1/16/2017)... Jan. 16, 2017  Eurofins Genomics today announced the ... more customers to receive their primers in a shorter ... in quality found with other providers. Express oligos are ... at no additional fee. Researchers ... studies, including DNA sequencing, genotyping, site-directed mutagenesis, and cloning. ...
(Date:1/13/2017)... DUBLIN , Jan 13, 2017 Research and ... report to their offering. ... The global biopolymers market to grow at a CAGR of 16.83% ... scenario and the growth prospects of the global biopolymers market for 2017-2021. ... the sale of sales of biopolymer products. The report also includes a ...
(Date:1/12/2017)... ... January 12, 2017 , ... ... IS A SUCCESS , VTI, Vertebral Technologies, Inc., announces the successful outcome ... expandable device. Since September 2016, VTI (Vertebral Technologies, Inc.) has partnered with ...
(Date:1/12/2017)... ... January 12, 2017 , ... After her brain ... doctors gave her only a few months to live. Now a paper publishing ... stabilized Rosendahl’s disease and increased both the quantity and quality of her life: ...
Breaking Biology Technology: