Navigation Links
A bug's (sex) life: Diving beetles offer unexpected clues about sexual selection
Date:2/6/2012

Studying female reproductive tracts and sperm in diving beetles (Dytiscidae), researchers from the University of Arizona and Syracuse University have obtained a glimpse into a bizarre and amazing world of sperm that can take on a variety of forms including joining together into conglomerates that navigate the twisted mazes of the female reproductive tract.

Analyses of the evolutionary relationships among diving beetles reveal that sperm form appears to follow function dictated by female reproductive organs.

"Our findings show that sexual selection isn't always all male-male competition," said Dawn Higginson, the study's lead author who is a postdoctoral research associate at the University of Arizona's Center for Insect Science, who did much of the work for this study with her doctorate advisor Scott Pitnick, a professor of biology at Syracuse University in Syracuse, N.Y.

"Rather than standing at the sidelines, it appears that females can take the lead in driving the evolution of male sexual traits," Higginson said.

The study results will be published the week of Feb. 6 in the journal Proceedings of the National Academy of Sciences.

Unlike most mammals in which fertilization involves large numbers of simple-built, individual sperm cells racing for the egg through a rather straightforward female reproductive tract, many other animal groups, especially invertebrates such as mollusks and insects, have evolved complex anatomical variations in both sperm and female reproductive organs.

According to Pitnick, sperm shape does not show much variation in species whose eggs are fertilized after they have left the female, such as most fish, for example.

"But once internal fertilization evolves, something happens and evolution goes crazy," he said. "In almost every animal group with internal fertilization that has been looked at, sperm have evolved into a real diversity of forms."

'/>"/>
Contact: Daniel Stolte
stolte@email.arizona.edu
520-626-4402
University of Arizona
Source:Eurekalert  

Page: 1 2 3 4

Related biology news :

1. Latest on malaria, dengue, radiation threats, bedbugs, cholera in Haiti at ASTMH Annual Meeting
2. Tuning natural antimicrobials to improve their effectiveness at battling superbugs
3. Hummingbirds catch flying bugs with the help of fast-closing beaks
4. Scientists develop a fatty kryptonite to defeat multidrug-resistant Super bugs
5. Scorpion venom -- bad for bugs, good for pesticides
6. UGA studies explain spread of invasive ladybugs
7. Can engineered bugs help generate biofuels? Study holds promise
8. Predatory bugs can save cornfields
9. Apathetic aphids with attitude become easier prey for ladybugs
10. Bees help to beat MRSA bugs
11. First preliminary profile of proteins in bed bugs saliva
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
A bug's (sex) life: Diving beetles offer unexpected clues about sexual selection
(Date:5/18/2015)... Sweden , May 18, 2015 ... fingerprint sensors FPC1020, FPC1025, FPC1145, FPC1155 and FPC1035 from one ... from June until and including Q3 2015 and the sensors ... . Communicated order values for 2015 hereby amount to ... for Q1 2015 of 140 MSEK and a number of ...
(Date:5/14/2015)... 2015  Verificient Technologies, Inc., a technology ... remote proctoring, announced a new alliance partnership ... creator of the Canvas Learning Management System ... will benefit from the seamless integration of ... a fully integrated multifactor biometrics behavioral application, ...
(Date:5/11/2015)... Ohio , May 11, 2015  Through a well-rounded ... Ohio had a strong showing at AUVSI,s Unmanned ... These representatives of Ohio,s UAS industry ... and abroad from all points along the UAS ecosystem. ... Development Coalition,s (DDC) Vice President for Aerospace Rich Knoll ...
Breaking Biology News(10 mins):Fingerprint Cards Receives Touch Fingerprint Sensor Order of SEK 230 Million and Raises Revenue Guidance for 2015 2Verificient and Instructure Announce Alliance Partnership to Provide Online Proctoring for K-12 and Higher Education Institutions 2Ohio Flies High at Unmanned '15, Sets Stage for Ohio UAS Conference 2
... Boulder, Colo., USA New GSA Bulletin articles cover wind ... on Kauai; new insights from the Petrified Forest, USA; a ... a new model for the development of Ries Crater Lake, ... large earthquakes in northern Fiordland, New Zealand; and the evolution ...
... research at the Institute of Food Research, has taken ... and drug companies worldwide. , IFR and the technology ... from the Biotechnology and Biological Sciences Research Council (BBSRC) ... and improve how well it simulates the release of ...
... surrounds the DNA of our cells could help develop treatments ... have discovered that the proteins within this coating known ... different organs of the body. This variation ... proteins in the protective seal to cause illness in some ...
Cached Biology News:Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 2Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 3Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 4Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 5Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 6Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 7Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 8Kauai, the Petrified Forest, Costa Rica, and more: New GSA Bulletin articles now online 9Commercial future for Model Gut 2Cell discovery could hold key to causes of inherited diseases 2
(Date:6/2/2015)... NEWTOWN, Pa. , June 2, 2015   ... services and technology provider, today announced that David ... has been named Executive Vice President and Chief Financial ... 8, 2015. Peters brings more than 25 ... in pharmaceutical services. "David has extensive and deep knowledge ...
(Date:6/2/2015)... , June 2, 2015  Alere Inc. ... rapid diagnostics, joined the White House Antibiotic Stewardship ... commitments to support and advance the President,s National ... commitments include a number of measurable goals and ... achieved, will help healthcare providers protect their patients ...
(Date:6/2/2015)... New Orleans, LA (PRWEB) June 02, 2015 ... of custom gene synthesis to improve protein expression, announced ... The board includes six executives and entrepreneurs with a ... and software industries. , The team includes: , ... Startup Fund: , Roussel has a background in technology ...
(Date:6/1/2015)... and RARITAN, N.J. , June ... (Janssen) announced data from the Phase 3 multicenter ... progression-free survival (PFS) with trabectedin (YONDELIS ® ) ... (LPS) or leiomyosarcoma (LMS) previously treated with an ... SAR3007 is the largest randomized Phase 3 study ...
Breaking Biology Technology:BioClinica Names David Peters New Chief Financial Officer 2Alere Announces Broad Initiatives to Help Combat Antibiotic Resistance during White House Antibiotic Stewardship Forum 2GenoCAD Announces New Board of Advisors, Improves Protein Expression Using Custom Gene Synthesis 2GenoCAD Announces New Board of Advisors, Improves Protein Expression Using Custom Gene Synthesis 3Trabectedin Improves Disease Control in Patients with Advanced Soft Tissue Sarcoma 2Trabectedin Improves Disease Control in Patients with Advanced Soft Tissue Sarcoma 3Trabectedin Improves Disease Control in Patients with Advanced Soft Tissue Sarcoma 4Trabectedin Improves Disease Control in Patients with Advanced Soft Tissue Sarcoma 5Trabectedin Improves Disease Control in Patients with Advanced Soft Tissue Sarcoma 6
... BIOD ) today reported financial results for the ... Quarter Operating Highlights During Biodel,s third quarter of ... 1 testing of two new ultra-rapid-acting formulations of recombinant human ... at Oregon Health and Sciences University who have initiated a ...
... Calif. and TORONTO, Aug. 4, 2011 ... developing a first-in-class anti-apoptosis therapeutic protein known as ... www.generex.com ), a biotechnology company developing a buccal ... in a Phase III trial, today are making ...
... AMSTERDAM, The Netherlands, August 4, 2011 SynCo ... of biopharmaceuticals today announced that its aseptic filling facility is ... first drug product batches for its clients after the expansion ... of the Class A zone is an important milestone in ...
Cached Biology Technology:Biodel Reports Third Quarter Fiscal Year 2011 Financial Results 2Biodel Reports Third Quarter Fiscal Year 2011 Financial Results 3Biodel Reports Third Quarter Fiscal Year 2011 Financial Results 4Biodel Reports Third Quarter Fiscal Year 2011 Financial Results 5Biodel Reports Third Quarter Fiscal Year 2011 Financial Results 6Amarantus BioSciences and Generex Biotechnology Collaborate on Cell Therapy for Late Stage Diabetes 2Amarantus BioSciences and Generex Biotechnology Collaborate on Cell Therapy for Late Stage Diabetes 3Amarantus BioSciences and Generex Biotechnology Collaborate on Cell Therapy for Late Stage Diabetes 4Amarantus BioSciences and Generex Biotechnology Collaborate on Cell Therapy for Late Stage Diabetes 5SynCo Bio Partners Expands the Class A Zone in its Aseptic Filling Facility 2
Agarose-ME, 500 g. Suitable for immunoelectrophoresis.Gel point (1.5%): 36 1.5 C, EEO (-mr): 0.16-0.19, Gel strength (1%): > 1000 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Bio...
... while maintaining high cell viability , ... , Fast: less than one ... , Highly reproducible results from ... with the Bio-Rad Gene Pulser Xcell System ...
100 adhesive strips....
Request Info...
Biology Products: