Navigation Links
Does it pay to be a lover or a fighter? It depends on how you woo females
Date:1/23/2014

As mating season approaches, male animals are faced with a question that can make or break their chances at reproducing: does it pay to be a lover or a fighter? Or both?

Researchers from The University of Manchester and Syracuse University in New York working with the University of Western Australia, found that where animals fall on the lover/fighter scale depends on how much they are able to ensure continued mating rights with females.

In species where fighting for the right to mate means greater control of females, such as in the elephant seal, males invest more in weapons and less in testes size.

But males produce large weapons and testes in species where fighting for females occurs both before mating with weapons and after mating with sperm.

Some males found fighting the most successful method. Others found fighting was only the first step in sexual relations and also had to rely on large testes ensure their fertility.

The study, published in Nature Communications today (23 January) looked at over 300 species and found that males' ability to monopolise a female for continued mating drove the way they evolved.

The study looked at sexual behaviours in male mammals, birds, fish, insects and flatworms and has found that males only traded-off investment in weapons and testes when they were sure that females wouldn't fool around with another male when their back was turned.

John Fitzpatrick, a Lecturer in Animal Evolution at The University of Manchester who was senior author of the research, said these finding help to explain why some animals appear to invest maximally in expensive sexual traits but others are more frugal.

Dr Fitzpatrick said: "We set out to see why some species show trade-offs in sexual traits and others do not the answer lies in how successfully males are able to keep females from mating with rivals.

"We know animals try to get females in a couple of ways. When they fight for them they sometimes evolve weaponry such as antlers or a really big body size or big teeth. The other way they do this is not to bother to compete before they mate but to have big testes and the highest sperm quality so that they can fertilise the most eggs."

Dr Stefan Lpold, from Syracuse University in New York, said: "It is quite costly to invest in everything. You don't get something for nothing in evolution, so we wanted to see which species invested in weapons over testes.

"Some of these species invest in both, and that is a bit of a mystery. We will now look at whether maximising investment in sexual traits means you pay the price in some other aspect of life."

Pheasants, minnows, and bush crickets invested in both weapons and testes, while pinnipeds, such as elephant seals where males are almost five times the size of females, and acanthocephalan (a type of worms) invested more in weaponry but not testes.

Other examples of males investing in weaponry are antlers in red deer, horns in dung beetles, spurs in pheasants and canine teeth in primates.

Dr Lpold added: "Understanding the ways animals reproduce is important as it helps us understand how species evolve and can prove important for conservation."


'/>"/>

Contact: Alison Barbuti
alison.barbuti@manchester.ac.uk
44-161-275-8383
University of Manchester
Source:Eurekalert

Related biology news :

1. Dark chocolate lovers show higher tolerance for bitterness in chocolate ice cream
2. Anne Glover and Sir Michael Stratton to meet the press at The EMBO Meeting 2013 in Amsterdam
3. The American Society for Microbiology honors Andrew Lovering
4. Are we really a nation of animal lovers?
5. Energy supply from hydropower projects depends on rainforest conservation
6. In autism, age at diagnosis depends on specific symptoms
7. Risk of cardiac arrest depends on where you live
8. In elk hunting, success depends on the animals personality
9. Biodiversity conservation depends on scale: Lessons from the science-policy dialogue
10. Biodiversity conservation depends on scale: Lessons from the sience-policy dialogue
11. Success of engineered tissue depends on where its grown
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/26/2016)... April 27, 2016 Research ... Multi-modal Biometrics Market 2016-2020"  report to their offering.  ... The analysts forecast the global multimodal ... 15.49% during the period 2016-2020.  Multimodal ... sectors such as the healthcare, BFSI, transportation, automotive, ...
(Date:4/13/2016)... 13, 2016  IMPOWER physicians supporting Medicaid patients in ... new clinical standard in telehealth thanks to a new ... higi platform, IMPOWER patients can routinely track key health ... mass index, and, when they opt in, share them ... to a local retail location at no cost. By ...
(Date:3/22/2016)... 2016 According to ... for Consumer Industry by Type (Image, Motion, Pressure, ... & IT, Entertainment, Home Appliances, & Wearable ... 2022", published by MarketsandMarkets, the market for ... USD 26.76 Billion by 2022, at a ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... June 23, 2016 /PRNewswire/ - FACIT has announced ... biotechnology company, Propellon Therapeutics Inc. ("Propellon" ... commercialization of a portfolio of first-in-class WDR5 inhibitors ... such as WDR5 represent an exciting class of ... precision medicine for cancer patients. Substantial advances have ...
(Date:6/23/2016)... -- The Prostate Cancer Foundation (PCF) is pleased to announce 24 new ... prostate cancer. Members of the Class of 2016 were selected from a pool ... Read More About the Class of 2016 PCF Young Investigators ... ... ...
(Date:6/23/2016)... , ... June 23, 2016 , ... STACS DNA Inc., ... Leader at the Arkansas State Crime Laboratory, has joined STACS DNA as a Field ... DNA team,” said Jocelyn Tremblay, President and COO of STACS DNA. “In further expanding ...
(Date:6/23/2016)... LONDON , June 23, 2016 ... & Hematology Review, 2016;12(1):22-8 http://doi.org/10.17925/OHR.2016.12.01.22 ... Review , the peer-reviewed journal from touchONCOLOGY, ... the escalating cost of cancer care is placing ... a result of expensive biologic therapies. With the ...
Breaking Biology Technology: