Navigation Links
Size does matter in sexual selection, at least among beetles
Date:10/25/2012

Swedish researchers - Cosima Hotzy, Goran Arnqvist and Johanna L. Ronn - bred male beetles with extraordinarily long genital spines. They simultaneously bred male beetles with extremely small spines. Experiments demonstrated that the males with long spines produced substantially more offspring.

"It is possible, however, that breeding for long spines introduced a secondary trait that affects fertility," Polak said. Unintended consequences, he said, are well known to animal breeders.

To prove that it was the spines and not some other trait, some beetles had their genital spines surgically modified using micro-scale laser surgery. Polak's laboratory has gained an international reputation for using a precision laser system to make microscopic changes to insect bodies.

Insects modified through both methods were then observed throughout the competitive mating process. The international team found that the longer genital spines directly contributed to successful fertilization. Seminal fluid from the males was also tracked through high-resolution radioisotope labels, and shown to enter the female body more quickly after mating with long-spined males than short-spined males.

"This provides experimental evidence that male genital morphology influences success in postcopulatory reproductive competition," Polak said.

There is more work to be done, Polak said, to understand the mechanism at work here. It is possible that these longer spines help introduce bio-active molecules from seminal fluid into the female circulatory system. These added proteins and peptides, which have yet to be characterized, may create effects within the female that contribute to male reproductive success. It is also possible that genital spines exert mechanical effects within the female by stimulating her reproductive tract during copulation, thereby inducing the female to uptake and use more of her current mate's sperm.


'/>"/>
Contact: Greg Hand
greg.hand@uc.edu
513-556-1822
University of Cincinnati
Source:Eurekalert  

Page: 1 2

Related biology news :

1. Probing matters of the heart
2. For the rooster, size matters
3. Black belts white matter shows how a powerful punch comes from the brain
4. US-Russian collaboration develops new method for sequencing dark matter of life from a single cell
5. No matter the drilling method, natural gas is a much-needed tool to battle global warming
6. Want bigger plants? Get to the root of the matter
7. Theres more star-stuff out there but its not dark matter
8. A matter of priorities
9. Size matters: Large Marine Protected Areas work for dolphins
10. Ultracold matter technology from CU and SRI International licensed to Boulders ColdQuanta
11. UCLA biologists reveal potential fatal flaw in iconic sexual selection study
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Size does matter in sexual selection, at least among beetles
(Date:9/11/2014)... Rice Research Institute of Iran have discovered that ... Asia, has changed its host preferences in order to adjust ... adaptation for biological control of problematic weeds in rice fields ... have been described in the open access journal ... permixtana have been so far reported to feed ...
(Date:9/11/2014)... , Sept. 11, 2014 NXT-ID, Inc. (Nasdaq: ... the growing mobile commerce market, announced today that its shares ... commenced trading on The Nasdaq Capital Market. The common stock ... "NXTDW," respectively. As of today, the Company,s common stock will ... quoted on the OTCQB will now be traded on Nasdaq. ...
(Date:9/11/2014)... have long been fascinated by animals, ability to ... now, no studies have directly tested whether those ... of fighting than they would using the fighting ... of Montana recently discovered each species, weapons are ... of fighting., The groundbreaking research, conducted over the ...
Breaking Biology News(10 mins):Unusual host preference of a moth species could be useful for biological control 2UM research reveals secrets of animal weapons 2
... cure, is a common expression, but what happens if preventative ... women are going out of their way not to be ... recent paper by Larsson et al. in AIDS ... and cost-effectively prevented using a short course of antiretroviral therapy. ...
... Researchers from Stony Brook University Medical Center in New ... genuine ancient human species and not a descendant of healthy ... remains of a well-preserved female specimen, researchers determined the "hobbit" ... version of modern humans. Details of the study appear ...
... In an advance with overtones of Star Trek phasers and ... of an internal on-off "switch" that paralyzes animals when exposed ... even when the light is turned off. When exposed to ... study appears in the Journal of the American Chemical ...
Cached Biology News:'Hobbits' are a new human species -- according to the statistical analysis of fossils 2
(Date:9/11/2014)... Frederick, MD (PRWEB) September 12, 2014 ... systems (LIMS), radio-frequency identification (RFID) solutions and sample ... version 5.1. , RURO completed work on the ... late August and it has already seen mass ... recent major release of version 5.0 brought an ...
(Date:9/11/2014)... team of Berkeley Lab researchers believes it has ... of single atomic layers of transition metal dichalcogenide ... promise for nanoelectronic and photonic applications. , ... of tungsten disulfide, one of the most promising ... existence of excitonic dark states energy states ...
(Date:9/11/2014)... surface of graphene, a one atom thick sheet of ... graphene oxide; a form of graphene that could have ... industries. Applied as paint, it could provide an ultra-strong, ... , Graphene oxide solutions can be used to ... even conventional bricks. After a simple chemical treatment, the ...
(Date:9/11/2014)... Sept. 11, 2014 XBiotech announced today it ... machine that the Company says will be used to ... system is designed to fill, stopper and crimp vials, ... Additionally, the unit is said to contain an in-line ... provide a high level of quality compared to less ...
Breaking Biology Technology:Limfinity® Version 5.1 Available 2Excitonic dark states shed light on TMDC atomic layers 2Excitonic dark states shed light on TMDC atomic layers 3Graphene paints a corrosion-free future 2
... Without effective and proper networking techniques, you may not be ... to other professionals. While people have their own networking style ... , ,You need to do what works best for you ... to learn new ideas about networking from other professionals who ...
... Neurognostics , a home-grown Milwaukee medical device company, finished ... first to take advantage of Wisconsin's new tax credits for ... an investment. , ,Neurognostics oversubscribed on its $1 million angel ... af Neurognostics. As a tech-based research and development company, the ...
... project to match genetic information from Alzheimer's patients with ... ,The two-year project is the first to tap the ... for its Personalized Medicine Research Project, one of the ... of electronic medical records, the project aims to develop ...
Cached Biology Technology:Improve your networking skills by learning from other professionals 2Improve your networking skills by learning from other professionals 3Improve your networking skills by learning from other professionals 4Milwaukee firm among first to use Act 255 tax credits in investor pitch 2Milwaukee firm among first to use Act 255 tax credits in investor pitch 3Milwaukee firm among first to use Act 255 tax credits in investor pitch 4Marshfield study mixes DNA into electronic medical record to screen for Alzheimer's 2Marshfield study mixes DNA into electronic medical record to screen for Alzheimer's 3
... Zyagen tissue microarrays are derived from ... to rigorous quality control procedures to ensure ... are manually assembled in one block, sectioned ... mounted on coated slides. Sections are large ...
... Zyagen tissue microarrays are derived from frozen ... rigorous quality control procedures to ensure the ... manually assembled in one block, sectioned at ... coated slides. Sections are large (3-5mm in ...
... The DNA Engine Opticon real-time PCR detection ... for fluorescence excitation (450-495 nm) and a ... The Opticon system is built on an ... a thermal gradient feature. This item includes ...
... for Optimal Microdissection , CapSure HS and ... and rapid extraction of populations of pure ... with Laser Capture Microdissection., Ensure the ... Analysis , All CapSure LCM Caps have ...
Biology Products: