Navigation Links
Male crickets with bigger heads are better fighters, study reveals, echoing ancient Chinese text
Date:1/7/2009

Observing and betting on cricket fights has been part of Chinese cultural tradition since at least the Sung Dynasty (A.D. 960-1278). This ancient practice has resulted in quite a detailed list of characteristics that Chinese practitioners think make for champion fighters. "Because money was involved, there was a strong incentive for the practitioners of this sport to observe their cricket fighters closely," says Kevin Judge, a biology postdoctoral researcher at University of Toronto Mississauga.

Interestingly, an 800-year-old Chinese text mentions that the best cricket fighters have the largest heads. In nature, male field crickets fight one another over territories and access to potential mates by using their pointed and pincer-like mouthparts as weapons. In a study published in the Dec. 24 issue of the online, open-access, peer-reviewed journal PLoS ONE, Judge and co-author Vanessa Bonanno show that, indeed, males with larger heads and mouthparts are more successful in fights with smaller-headed rivals. They also show that male field crickets have larger heads and mouthparts than females, which, "makes sense given that female crickets don't fight over mates," says Judge.

Field crickets, a diverse group of insects distributed around the globe, have been important subjects for researchers interested in studying the evolution of animal aggression and the settlement of contests between individuals. For all that study, the influence of heads and mouthparts as weaponry has been largely overlooked in field crickets, unlike their close allies, the New Zealand weta, says Judge.

The study by Judge and Bonanno, "tested theories of contest settlement and sexual selection, and how body shape has evolved to help males in competition with other males," says Judge.

The researchers conducted two experiments to test the hypothesis that relatively larger weaponry conveys an advantage to males in aggressive contests. Pairs of males w
'/>"/>

Contact: Kevin Judge
kevin.judge@utoronto.ca
905-828-5267
Public Library of Science
Source:Eurekalert

Page: 1 2

Related biology news :

1. In the animal world, bigger isnt necessarily better
2. Plants grow bigger and more vigorously through changes in their internal clocks
3. Largest ever study of genetics of common disease just got bigger
4. Insects take a bigger bite out of plants in a higher CO2 world
5. Seismic images show dinosaur-killing meteor made bigger splash
6. Economists: Reduce fish catch now for bigger net profits later
7. CT scans reveal that dinosaurs were airheads
8. United we stand: When cooperation butts heads with competition
9. Soybean database will help breeders engineer better-performing plants
10. Diverse landscapes are better: Policymakers urged to think broadly about biofuel crops
11. Diverse landscapes are better: Policymakers urged to think broadly about biofuel crops
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/4/2015)... Research and ... addition of the "Digital Forensics Market ... (Computer Forensics, Network Forensics, Mobile Device Forensics, ... and Region - Global Forecast to 2020" ... By Component (Hardware, Software, and Service), Sub-Segment ...
(Date:8/4/2015)... 2015  AMRI (NASDAQ: AMRI ) today reported financial and ... Highlights: , Second quarter contract revenue of ... , Adjusted contract margins of 26 % ... a $0.05 decrease in EPS from royalties in the current quarter ... "We are very pleased to present another strong financial ...
(Date:8/3/2015)... 2015 Synaptics, Inc. (Nasdaq: SYNA ), ... that members of the executive management team will present ... Technology Leadership Forum on Tuesday, August 11, 2015 at ... at the Sonnenalp Resort in Vail, CO. ... forward-looking information. An audio webcast of the event will ...
Breaking Biology News(10 mins):Digital Forensics Market - The Market Represents a Compound Annual Growth Rate (CAGR) of 11.3% From 2015 to 2020 2AMRI Announces Second Quarter 2015 Results 2AMRI Announces Second Quarter 2015 Results 3AMRI Announces Second Quarter 2015 Results 4AMRI Announces Second Quarter 2015 Results 5AMRI Announces Second Quarter 2015 Results 6AMRI Announces Second Quarter 2015 Results 7AMRI Announces Second Quarter 2015 Results 8AMRI Announces Second Quarter 2015 Results 9AMRI Announces Second Quarter 2015 Results 10AMRI Announces Second Quarter 2015 Results 11AMRI Announces Second Quarter 2015 Results 12AMRI Announces Second Quarter 2015 Results 13AMRI Announces Second Quarter 2015 Results 14AMRI Announces Second Quarter 2015 Results 15AMRI Announces Second Quarter 2015 Results 16AMRI Announces Second Quarter 2015 Results 17AMRI Announces Second Quarter 2015 Results 18AMRI Announces Second Quarter 2015 Results 19AMRI Announces Second Quarter 2015 Results 20AMRI Announces Second Quarter 2015 Results 21AMRI Announces Second Quarter 2015 Results 22AMRI Announces Second Quarter 2015 Results 23AMRI Announces Second Quarter 2015 Results 24
... , Invasions of voracious predatory crabs due to global ... according to newly published findings. "King crabs ... economically significant commercial fisheries," said Dr Sven Thatje, an ... Ocean and Earth Science (SOES), which is based at ...
... A team of scientists has, for the first time, completely ... formation of ground-level ozone in urban areas. The team,s results ... urban areas during episodes of poor air quality (smoggy days) ... level ozone poses significant health hazards to people, animals and ...
... One of the many advantages of maintaining a normal body ... healthy heart. Fat tissue is increasingly seen as more than ... organ that normally produces high levels of a cardioprotective hormone ... has long been a mystery, and now a team led ...
Cached Biology News:King crab distributions limited by temperature in the Southern Ocean 2Study improves accuracy of models for predicting ozone levels in urban areas 2Study improves accuracy of models for predicting ozone levels in urban areas 3Study improves accuracy of models for predicting ozone levels in urban areas 4Study finds fat hormone's long-sought link to heart protection 2
(Date:8/4/2015)... ... August 04, 2015 , ... Graphite Metallizing Corporation, the manufacturer ... the appointment of Dennis Rawle as European Director of Sales. Rawle has over ... was General Manager and Technical Sales Manager for pump products at Exalto UK. ...
(Date:8/4/2015)... PORTLAND, Oregon , August 4, 2015 /PRNewswire/ ... published by Allied Market Research, titled, "World Cardiac ... global cardiac biomarker market would generate the revenue ... of 18.9% from 2015 to 2020. Cardiac Troponins ... throughout the forecast period due to high sensitivity ...
(Date:8/4/2015)... 4, 2015 Trigemina, Inc., a biopharmaceutical company ... delivered, analgesic drug products, announced today that the company ... of chief medical officer. Dr. Kori brings over 30 ... which has been focused in the neuroscience and headache ... Kori to our clinical team given his vast experience ...
(Date:8/4/2015)... , ... August 04, 2015 , ... ... point-of-care (POC) diagnostic tests – today announced that Robert A. Gregg, PhD, has ... has more than 30 years of relevant experience and remarkable achievements in the ...
Breaking Biology Technology:Dennis Rawle Joins Graphite Metallizing Corporation 2Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 2Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 3Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 4Cardiac Biomarker Market is Expected to Reach $2,085.9 Million by 2020 5Trigemina Appoints Dr. Shashi Kori to the Position of Chief Medical Officer 2Trigemina Appoints Dr. Shashi Kori to the Position of Chief Medical Officer 3RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 2RPS Diagnostics Welcomes Robert Gregg as Senior Vice President of Clinical and Regulatory Affairs 3
... SUNNYVALE, Calif., June 24 Cepheid (Nasdaq: CPHD ... Universal Antenatal Screening for Group B Streptococcus, published in ... Medicine concluded that rapid, PCR-based testing at the time of ... streptococcal (GBS) screening over the normal antepartum testing done at ...
... neuropathy, and other conditions caused by a loss of myelin ... adequate treatments do not yet exist. That,s in large part ... issue of the journal Biomaterials , a UCF team ... motor nerves that are insulated and organized the same way ...
... 23 Environmental Tectonics Corporation (OTC Bulletin Board: ETCC) ... Division will be exhibiting at the upcoming Undersea and ... non-profit organization and is the primary source of scientific ... , The 2009 Annual UHMS meeting will be ...
Cached Biology Technology:New England Journal of Medicine Study Highlights Need for Rapid, PCR-based Group B Streptococcus (GBS) Testing at Time of Admission for Labor and Delivery 2New England Journal of Medicine Study Highlights Need for Rapid, PCR-based Group B Streptococcus (GBS) Testing at Time of Admission for Labor and Delivery 3New England Journal of Medicine Study Highlights Need for Rapid, PCR-based Group B Streptococcus (GBS) Testing at Time of Admission for Labor and Delivery 4UCF team's advanced nerve cell system could help cure diabetic neuropathy, related diseases 2UCF team's advanced nerve cell system could help cure diabetic neuropathy, related diseases 3UCF team's advanced nerve cell system could help cure diabetic neuropathy, related diseases 4Environmental Tectonics Corporation's BioMedical Division to Exhibit at Undersea and Hyperbaric Medical Society Meeting 2Environmental Tectonics Corporation's BioMedical Division to Exhibit at Undersea and Hyperbaric Medical Society Meeting 3Environmental Tectonics Corporation's BioMedical Division to Exhibit at Undersea and Hyperbaric Medical Society Meeting 4
... Stabilizer has been developed specifically for ... proteins on microwell plates/strips. Coating ... of the antibody or protein antigen ... Product is filtered at 0.2 ...
... Novagen's HT96 Isothermal Block is an anodized ... HT96 plates and to provide efficient thermal ... This new design of the HT96 Isothermal ... an enhanced product design allowing for compatibility ...
Umbilical cord blood neutrophils, For immunohistochemistry (IHC)...
...
Biology Products: