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:8/19/2015)... N.Y. , Aug. 19, 2015  VOXX ... that it has entered into a Definitive Agreement ... property, of iris authentication market leader EyeLock through ... VOXX will have a controlling interest in the ... subject to completion of due diligence.  Expanding on ...
(Date:8/12/2015)... SPRINGS, Florida , August 12, 2015 ... the pace of mobile payment innovation and advanced biometrics ... to replace the way consumers rely on using their ... ahead with reinventing the future for payment services led ... (NASDAQ: NXTD ), :  Google, Inc. (NASDAQ: ...
(Date:8/10/2015)... 10, 2015 The latest 364 page ... analysis of the global border security market . ... $16.4bn in 2015. Now: Border security is hard ... of the business critical issue you need to know about ... ,s objective analysis of how this will impact your company ...
Breaking Biology News(10 mins):VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 2VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 3VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 4VOXX International Corporation Signs Definitive Agreement To Acquire The Assets And A Controlling Interest Of Biometric Leader EyeLock 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 2Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 3Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 4Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 5Digital Wallet Devices & Mobile Payment Management Services Gain a Distinct Advantage in the Digital Payment Evolution as Demand Continues to Grow 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 2Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 3Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 4Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 5Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 6Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 7Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 8Border Security Market Report 2015-2025 - Growth in Biometrics, ICT, Manned and Unmanned Vehicles, and Perimeter Surveillance 9
... N.Y. (Mon., Feb. 1, 2010) -- Mapping DNase ... for identifying genetic regulatory elements such as promoters, enhancers, ... nucleosome-depleted, presumably to provide access for transcription factors, are ... use Southern blots to then identify these hypersensitive sites. ...
... emerging from the subway and heading for your destination when ... For a moment, you feel disoriented, but a scan of ... you pinpoint your location, and you make it to your ... that human adults, toddlers, rats, chicks and even fish routinely ...
... A new therapeutic made from tobacco plants has been ... a new study by Arizona State University scientist Qiang ... at Arizona State University,s Biodesign Institute and professor in ... the first to demonstrate a plant-derived treatment to successfully ...
Cached Biology News:High-throughput analysis of gene regulation, DNA synthesis in Cold Spring Harbor Protocols 2Ability to navigate may be linked to genes, researcher says 2Ability to navigate may be linked to genes, researcher says 3Tobacco plant-made therapeutic thwarts West Nile virus 2Tobacco plant-made therapeutic thwarts West Nile virus 3Tobacco plant-made therapeutic thwarts West Nile virus 4
(Date:8/27/2015)... ... ... Inc. Magazine released its annual list of the 5,000 fastest-growing privately held ... the three years through 2014. Being named to the Inc. 5000 list designates a ... , “We are thrilled to make the Inc. 5000 list for 2015,” stated ...
(Date:8/26/2015)... 26, 2015 /PRNewswire/ - iCo Therapeutics ("iCo" or "the ... results for the quarter ended June 30, 2015. ... dollars and presented under International Financial Reporting Standards ... respect to our Oral Amp B program, rapidly ... said Andrew Rae , President & CEO ...
(Date:8/26/2015)... 2015 Intrexon Corporation (NYSE: XON ), ... of its previously announced public offering of common stock, ... their option to purchase an additional 731,707 shares of ... per share.  The exercise of the underwriters, option brought ... by Intrexon to 5,609,756 shares and increased the total ...
(Date:8/26/2015)... ... August 26, 2015 , ... PRC Clinical, a Clinical ... relationships with local sponsors in southern California. The Clinical Trial Management Expert CRO seeks ... and regulatory pathways., , Stem Cell Meeting on the ...
Breaking Biology Technology:iLab Solutions Named to 2015 Inc. 5000 List 2iLab Solutions Named to 2015 Inc. 5000 List 3iCo Therapeutics Announces Second Quarter 2015 Financial Results 2iCo Therapeutics Announces Second Quarter 2015 Financial Results 3Intrexon Announces Closing of $230 Million Public Offering of Common Stock including Full Exercise of Underwriters' Option to Purchase Additional Shares 2Intrexon Announces Closing of $230 Million Public Offering of Common Stock including Full Exercise of Underwriters' Option to Purchase Additional Shares 3Intrexon Announces Closing of $230 Million Public Offering of Common Stock including Full Exercise of Underwriters' Option to Purchase Additional Shares 4PRC Clinical To Attend Major Industry Conferences And Meet Sponsor Companies In The San Diego Biotech Hub 2PRC Clinical To Attend Major Industry Conferences And Meet Sponsor Companies In The San Diego Biotech Hub 3
... by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries ... ... lpUnit=,PRN,; --> ... = function(data) { var s = ,; var first_result; // Results are keyed by longUrl, so ...
... Oct. 6 Glencoe Software, Inc., The Journal ... Press are pleased to announce the release of the ... scientific image data publication system. First released in Dec. ... under continuous development to support new image data formats ...
... Produces Isobutene From... -- EVRY, France, October 6, 2010 ... ... ... first_result; // Results are keyed by longUrl, so we need to grab the first one. for (var ...
Cached Biology Technology:Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 2Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 3Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 4Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 5Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 6Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 7Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 8Angiotech Pharmaceuticals, Inc. Announces Commencement of Arbitration and Litigation Proceedings by QSR Holdings, Inc. Against the Company And Certain of Its Subsidiaries 9Glencoe Software and The Journal of Cell Biology Pioneer Online Publishing of Scientific Image Data: New Version of JCB DataViewer Released 2Glencoe Software and The Journal of Cell Biology Pioneer Online Publishing of Scientific Image Data: New Version of JCB DataViewer Released 3Global Bioenergies Succeeds in Creating a Bacterial Prototype That Produces Isobutene From Glucose 2Global Bioenergies Succeeds in Creating a Bacterial Prototype That Produces Isobutene From Glucose 3Global Bioenergies Succeeds in Creating a Bacterial Prototype That Produces Isobutene From Glucose 4Global Bioenergies Succeeds in Creating a Bacterial Prototype That Produces Isobutene From Glucose 5Global Bioenergies Succeeds in Creating a Bacterial Prototype That Produces Isobutene From Glucose 6Global Bioenergies Succeeds in Creating a Bacterial Prototype That Produces Isobutene From Glucose 7
Anti-Human Complement Component C4c, IgY fraction (Polyclonal) (chicken IgY)...
... to amino acids 2-105 from human SKAP55. ... used in Western blot, immunocytochemistry and immunoprecipitation ... detects an ~ 60 kDa protein from ... used in immunoprecipitation and immunocytochemical procedures. ...
... to suit the widest possible range of ... laboratory. Labware carriers can be placed at ... simple for the user, thanks to a ... correctly guided into position. This allows easy ...
... CELlulose) was developed in the late 1960s ... of the earliest commercial pioneers of immunoassay ... range in 1987. Sac-Cel rapidly found favour ... own "in house" radioimmunoassays, and became a ...
Biology Products: