Navigation Links
Sperm trading can resolve hermaphrodite mating conflicts

By directly manipulating mating performance in a tropical sea slug, Chelidonura hirundinina, researchers of the University of Tbingen have now shed light on the bizarre reproductive conflicts encountered by hermaphroditic animals. In some hermaphroditic species, such as C. hirundinina, mating partners may insist on copulating as a "male," "female," or both, resulting in unique biological conflicts over gender.

Sexual interactions in so-called cross-fertilizing simultaneous hermaphrodites, such as earthworms, snails, leeches, and some fishes, have long challenged researchers' understanding of how established theories regarding sexual selection apply in cases of hermaphroditic species. For example, combining male and female gender in one and the same individual, hermaphrodites have been predicted to frequently be at conflict (theoretically speaking) about which sexual roles to play, because matings are often more costly, in terms of evolutionary fitness, to one gender than to the other. In such cases, hermaphrodites are predicted to share a preference to copulate in the more beneficial gender role. This would appear to make the interests of any two potential mates incompatible. For 20 years, evolutionary biologists have speculated that hermaphrodites may solve such mating conflicts by "trading sperm," that is, giving sperm only when the mating partner follows suit. However, this prediction had never been proven experimentally.

In the new work, researchers Nils Anthes, Annika Putz, and Nico Michiels generated individual sea slug hermaphrodites only capable of performing a "dry" copulation--that is, without sperm transfer. Sea slugs that mated with such a "cheating" partner interrupted sexual intercourse significantly sooner than did control pairs. This supports the concept of sperm trading, where mates negotiate mating roles in order to balance sexual interactions.


'"/>

Source:Cell Press


Page: 1

Related biology news :

1. Sperm stem cells closer to being like embryonic stem cells
2. Sperm created in the laboratory from embryonic stem cells produce viable progeny
3. Crickets finicky mating behavior boosts biodiversity
4. PHACCS, an online tool for estimating the structure and diversity of uncultured viral communities using metagenomic information
5. Certain fish have a special mating preference
6. Space matters: Estimating species diversity in the fossil record
7. Weapon performance determines mating success in the collared lizard
8. Divergent mating systems and parental conflict as a barrier to hybridization in flowering plants
9. New study examines how sense of smell affects mating and aggression in mice
10. Same-sex mating by fungi spawned infection outbreak, evidence suggests
11. Male chimpanzees prefer mating with old females
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Sperm trading can resolve hermaphrodite mating conflicts

(Date:12/19/2014)... 18, 2014 Research and Markets ( http://www.researchandmarkets.com/research/86ncd6/micro_market ) ... North America Perimeter Security Systems Market" report to their ... The North American perimeter security market is estimated to grow ... the U.S. market holds a larger share in this market, ...
(Date:12/17/2014)... FORT BELVOIR, Va. , Dec. 15, 2014 ... make it easier to detect and prevent counterfeit microcircuits ... the agency started performing an in-house microcircuit anti-counterfeit initiative ... of purchased microcircuits while increasing their reliability throughout the ...
(Date:12/17/2014)... 16, 2014  Automation is fundamentally transforming the travel experience ... borders. Over the past decade, ePassports, biometric readers, and ... process through border control via eGates and Automated Passport ... seaports, and land borders across the globe. ...
Breaking Biology News(10 mins):Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 2Micro Market Monitor: North America Perimeter Security Systems Market (Intrusion Detection Sensor, Video Surveillance, Communication/Alarm and Notification, Access Control System) 3Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 2Defense Logistics Agency Launches DNA Marking Capability to Strengthen Microcircuit Supply Chain 3Automated Border Control (ABC) Transforms the Global Travel Experience With More Than 2500 ABC eGates and APC Kiosks Deployed In Airports, Seaports, and Land Borders Worldwide 2
... mysterious island that moves through time. Travelers in search ... fiction television show "Lost," but it also describes a ... students. Iris Totten, an associate professor of geology ... professor of geology at University of Missouri at Kansas ...
... A first of its kind study examining the effects of ... cause abnormal brain development in children. The research is published ... , the medical journal of the American Academy of Neurology. ... women of childbearing age, leading to an increasing number of ...
... are less likely to use folic acid supplements before ... immigrated to the country, according to a new study ... with Statistics Canada, Health Canada and the University of ... estimates of pre-pregnancy folic acid use in Canada. ...
Cached Biology News:K-State using Second Life island to help high school students learn earth science 2Prenatal meth exposure linked to abnormal brain development 2Immigrant women may be at higher risk of having a baby with a birth defect 2
(Date:1/22/2015)... 22, 2015 Selexis SA, a serial ... Cell Banks (RCBs) used for drug discovery to commercial ... will include Next-Generation Sequencing (NGS) data packages. ... biologic manufacturing by ensuring the integrity of the gene, ...
(Date:1/22/2015)... , Jan. 22, 2015   GenoSpace , a precision ... tools to enable the broad use of genomic, imaging and ... the appointment of Michelle Munson , CEO of Aspera, ... Logo - http://photos.prnewswire.com/prnh/20150122/170713 ...
(Date:12/24/2014)... AUSTIN, Texas , Dec. 24, 2014  Vermillion, ... focused on gynecologic disease, announced today that the ... investors including Oracle Investment Management, Jack W. ... directors. Total proceeds were $10.5 million, before offering ...
(Date:12/24/2014)... BOSTON, MA (PRWEB) December 23, 2014 ... series is designed to introduce cutting edge communication ... partners of platform upgrades. This webinar series demonstrates ... their quest to leverage web conferencing’s most innovative ...
Breaking Biology Technology:Selexis Generated Research Cell Banks Now Fully Sequenced Using Next-Generation Sequencing 2GenoSpace Expands Board with Appointment of Michelle Munson 2Vermillion Announces Closing of Equity Financing 2Vermillion Announces Closing of Equity Financing 3SoundConnect Launches Leading Edge Business Communications Webinar Series 2SoundConnect Launches Leading Edge Business Communications Webinar Series 3
... ... present at the Process Expo 2010 in Chicago from July 18 – ... and manufacturing of industrial wastewater treatment systems for the food processing industry. ... and that FRC is a major well-known and respected DAF (Dissolved Air ...
... Talecris Biotherapeutics Holdings Corp. (Nasdaq: TLCR ) today ... as vice president, U.S. Product Management.  In this role, Morgan will ... product portfolio in the U.S. , ... "Lafmin brings significant experience and leadership to ...
... Bion Environmental Technologies, Inc. (OTC Bulletin Board: BNET) today ... July 14 , hosted by SUNY Oswego ,s Office ...  The forum, sought by Bion along with Operation Oswego, ... beef cattle production facility that would be integrated with beef ...
Cached Biology Technology:FRC Systems International State-of-the-art Industrial Wastewater Treatment Systems 2FRC Systems International State-of-the-art Industrial Wastewater Treatment Systems 3Lafmin Morgan Joins Talecris Biotherapeutics as Vice President, U.S. Product Management 2Bion Confirms Participation in SUNY Oswego's Forum 2Bion Confirms Participation in SUNY Oswego's Forum 3Bion Confirms Participation in SUNY Oswego's Forum 4
... Leukemia Virus Reverse Transcriptase (M-MLV RT) is an ... cDNA synthesis with long messenger RNA templates (>5kb). ... gene of M-MLV and consists of a single ... RNase H activity of M-MLV RT is weaker ...
... ds Qualified is a special preparation of bovine ... double stranded cleavage of DNA molecules. In the ... enzyme makes double strand breaks at random sites ... fragments can be controlled by the enzyme concentration ...
...
p230 trans Golgi Purified Anti-Human clone 15, Isotype Mouse IgG 1 , 50 µg Consult technical datasheet for details....
Biology Products: