Navigation Links
Spread your sperm the smart way
Date:7/9/2009

Attractive males release fewer sperm per mating to maximise their chances of producing offspring across a range of females, according to a new paper on the evolution of ejaculation strategies. The findings by researchers at UCL (University College London) and the University of Oxford suggest that, paradoxically, matings with attractive males may be less fertile than those with unattractive ones.

In the paper, published in the journal American Naturalist, the team mathematically modelled a range of male ejaculation strategies to look for the optimum "sperm load" per mating, and how this might vary depending on mating patterns. Previous studies have shown that in animals such as the domestic fowl, and fish such as the Arctic charr, males with privileged access to females produce ejaculates of lower fertilising quality than subordinate males.

Sam Tazzyman, UCL CoMPLEX (Centre for Mathematics and Physics in the Life Sciences and Experimental Biology), says: "In some species, females mate with many different males. Each male's sperm competes with that of other males in a process known as 'sperm competition'. Since males have finite resources to allocate to breeding, they allocate them carefully to each mating to maximise their number of offspring. If a male puts a lot of resources into each mating he will get more offspring per mating, but at the expense of fewer matings. If, on the other hand, a male puts few resources into each mating he will secure less paternity per mating, but will be able to carry out more matings overall. Thus, there is a trade-off between number of matings and success per mating."

"How a male negotiates this trade-off depends on how easy he finds it to attract females. The more attractive a male is, the more females will be willing to mate with him, reducing the value of each mating to him. This means it is optimal for him to contribute fewer sperm per mating. Although this reduces fertility per mating, it
'/>"/>

Contact: Jenny Gimpel
44-020-767-99726
University College London
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Targeting children effective use of limited supplies of flu vaccine and could help control flu spread
2. Scientists examine perceptions of risk and the spread of disease
3. LSUHSC research describes function of key protein in cancer spread
4. Bacteria play role in preventing spread of malaria
5. Social separation stops flu spread, but must be started soon
6. 3-D research model tackles prostate cancer spread
7. TGen researchers discover possible way to block the spread of deadly brain tumors
8. Minimizing the spread of deadly Hendra virus
9. UC Davis researchers identify a protein that may help breast cancer spread, beat cancer drugs
10. New wheat disease could spread faster than expected
11. Flies may spread drug-resistant bacteria from poultry operations
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/19/2014)... Dec. 18, 2014 Research and Markets ... "Micro Market Monitor: North America Perimeter Security Systems ... http://photos.prnewswire.com/prnh/20130307/600769 The North American ... CAGR of 3.6% from 2014 to 2019. Although the ... Canada is expected to grow ...
(Date:12/17/2014)... , Dec. 15, 2014 Research and Markets ... addition of the "Samsung Galaxy S5 - ... report to their offering. ... totally different sensing technology than the iPhone 5S, ... sensor in its product. The Galaxy ...
(Date:12/17/2014)... -- Valencell, a leader in performance biometric data sensor ... leaders such as Intel, Jabra, Atlas, and Scosche to ... These products will be showcased at CES 2015, taking ... . "Our partners choose PerformTek biometrics, ... with the clinical data to back it up," said ...
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) 3Samsung Galaxy S5 - Home Button Synaptics Fingerprint Sensor Technology Analysis 2Valencell PerformTek Biometrics Power the Most Accurate Wearables at CES 2015 2
... 2012; Wiley-Blackwell, the scientific, technical, medical and scholarly publishing ... two new interdisciplinary review publications: WIREs Developmental Biology ... WIREs Developmental Biology will focus on ... fully patterned adult organism. Edited by John C. Gerhart ...
... for Molecular Medicine (MDC) Berlin-Buch and of the Excellence Cluster ... the Helmholtz Association over the next two years. The grant ... to treat diseases that are caused by protein misfolding. These ... by the MDC, a member institution of the Helmholtz Association, ...
... BOSTON (February 23, 2012, 5:00 pm ET) Researchers ... in vitro and in vivo study, published today in ... stimulates the growth of blood vessels and promotes re-growth of ... new treatment for chronic and acute wounds. The ...
Cached Biology News:Wiley-Blackwell launches 2 interdisciplinary review titles in developmental and membrane biology 2Accelerated search for active agents to treat Alzheimer's and Parkinson's 2Novel bioactive peptides promote wound healing in vivo 2Novel bioactive peptides promote wound healing in vivo 3
(Date:12/19/2014)... Dec. 19, 2014 Decision Resources Group finds ... at a 12 percent compound annual growth rate through ... aging population and the increasing adoption of dental implants. ... will also spur demand for dental biomaterials because ... and periodontal treatments. Other key findings from ...
(Date:12/19/2014)... (PRWEB) December 18, 2014 ... nation’s leading specialty pharmacies, has an expanded team ... clinical pharmacy consultants for prescriber offices in their ... , “We have a variety of Regional ... example, those specializing in hepatitis C help prescribers ...
(Date:12/19/2014)... Arlington, MA (PRWEB) December 18, 2014 ... products for ophthalmology and wound care. The National Eye ... has awarded LayerBio a Phase I SBIR grant to ... , Cataracts are the most common cause of vision ... cause of blindness worldwide. According to Dr. Ken Mandell, ...
(Date:12/19/2014)... Reports from CDC show approximately ... one or more chronic health conditions - including cardiovascular ... some of these diseases, but may not eliminate the ... While implanted nerve stimulation devices today offer relief, they ... can induce side effects. , To eliminate the ...
Breaking Biology Technology:Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 2Latin American Dental Biomaterial Market Will Expand at a 12 Percent Annual Growth Rate Through 2023 3BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 2BioPlus Specialty Pharmacy Expands ‘Regional Pharmaceutical Care Liaison’ Team 3LayerBio Awarded NIH Grant to Develop a Drug Delivery Device for Cataract Surgery 2Draper Wins GSK Funding for Smaller, Smarter Implantable Devices 2
... Technology Inc. , the company whose automated computer system ... extending its market reach with a new acquisition. , ... based here, acquired Equipsoft Corp. , a Knoxville, ... ,"Equipsoft offers a complementary product line. The combined enterprises ...
... - Speaking at last week's state biotechnology conference, former governor ... a man with higher office on his mind. Make that ... of Wisconsin in 1998 and who resigned as U.S. ... disgruntled with the Bush White House , would ordinarily ...
... Department of Commerce has qualified seven small ... Investor and Venture Fund Tax Credit programs. , ... technology and biotechnology companies, offer Wisconsin income tax credits ... funds. People that invest in qualified businesses can claim ...
Cached Biology Technology:Eagle Technology acquires some synergy 2Tommy Thompson's Iowa strategy isn't far-fetched 2Tommy Thompson's Iowa strategy isn't far-fetched 3Tommy Thompson's Iowa strategy isn't far-fetched 4Commerce qualifies seven for investor tax credits 2
...
...
... cytostatic and anti-viral agent. Inhibits several important steps ... formation of HUVEC cells. Also reduces intracellular reactive ... IL-8 release of endothelial cells. ... 16 O 8 MolWeight: ...
For mRNA Differential Display with three one-base anchored oligo-dT primers and rationally designed arbitrary 13mers. These kits feature the latest generation of isotopic mRNA Differential Display t...
Biology Products: