HOME >> BIOLOGY >> NEWS
Hormone helps fish to mate, may affect human hearing

ITHACA, N.Y. -- Without enough estrogen-like hormone in their systems, female plainfin midshipman fish turn a deaf ear to the alluring love songs of the males. And, according to Cornell University biologists, a similar steroid-sensitive response could underlie changes in the hearing sensitivity of humans. The biologists experimentally boosted levels of the steroid hormone in non-reproductive females of the fish species Porichthys notatus, temporarily altering their inner-ear auditory mechanism so they could hear the males' hum-like advertisement call that says, essentially: "I have prepared a nest under a rock in shallow water, so deposit your eggs for me to fertilize, and together we'll make beautiful small fry."

Altering steroid hormone levels did not change the reproductive status of the females; the eggs they carried were still immature and were not ready to be deposited, even if the hearing-enhanced females had been attracted to the males' nests. Rather, the Cornell biologists found a hormonal trigger for a complex auditory system.

Andrew H. Bass, the Cornell professor of neurobiology and behavior who led the research team that reported the findings in the July 16, 2004, issue of Science ("Steroid-dependent Auditory Plasticity Leads to Adaptive Coupling of Sender and Receiver") comments: "We suspected that enhancing the sensitivity of the females' ears to the upper harmonics of the males' hums should improve detection of their vocalizations. Upper harmonics propagate farther in shallow water environments like those where midshipman males build nests and sing their love song to attract females.

"But the females can't process this vital information and respond appropriately if they can't hear it. Steroid hormones appear to provide a key molecule that leads to shifts in the hearing sensitivity of females," Bass said.

Paul M. Forlano, a graduate student in Bass's lab, and David L. Deitcher, one of Bass's colleagues at Cornel
'"/>

Contact: Roger Segelken
hrs2@cornell.edu
607-255-9736
Cornell University News Service
15-Jul-2004


Page: 1 2 3

Related biology news :

1. Hormone linked to obesity plays positive role in fertility & possibly male arousal
2. Hormones, sand & terrorism
3. Hormone therapy could help prevent pre-term births
4. Hormones modify the type of proteins produced
5. Hormone replacement therapy may improve breast cancer detection and survival rate
6. Hormone found to reduce appetite by a third
7. Hormone replacement therapy may help prevent heart vessel disease, says Wake Forest researcher
8. Hormone replacement therapy may help prevent chronic wounds in elderly patients
9. Hormone therapy may boost quality of life, say Stanford researchers
10. APS hosts the "Genome and Hormone" Conference
11. Hormone the trigger for fat metabolism; scientists closer to tests in humans

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/22/2018)... DIEGO (PRWEB) , ... September 20, 2018 , ... ... new 1.3.0 version of NovoExpress® software which supports the recently launched ... addition to NovoCyte® flow cytometer and NovoSampler® Pro products. , ...
(Date:9/15/2018)... ... September 14, 2018 , ... The first ever production picosecond-domain laser with a ... and purple tattoo inks - often the colors most resistant to laser removal. , ... of the American Society for Laser Medicine and Surgery, Inc. (ASLMS) investigated the safety ...
(Date:9/12/2018)... ... 2018 , ... JoVE, the leading producer and publisher of ... development of academic librarians by sponsoring four award-winners to attend the Charleston Library ... successful strategies to increase collaboration among librarians and STEM faculty and students. This ...
Breaking Biology News(10 mins):
(Date:9/7/2018)... ... 06, 2018 , ... Cognition® Corporation , a software ... its upcoming user conference. , This year NAVIGATE2018 —the annual conference—will ... approaches to regulatory compliance and quality management. , “We’ve got a stellar lineup ...
(Date:8/31/2018)... ... 30, 2018 , ... Small, wireless and networked describes more than the latest ... too. Draper’s latest system is tiny in size, but is poised to make a ... the new implant design is the growing awareness that disease often involves complex interactions ...
(Date:8/29/2018)... ... August 28, 2018 , ... LabRoots , the leading provider ... is proud to announce the launch of a new gamification feature, allowing users to ... win one of LabRoots most popular shirts. , Throughout each month, LabRoots users will ...
(Date:8/23/2018)... (PRWEB) , ... August 23, 2018 , ... Visikol ... Visikol Co-Founder Dr. Thomas Villani. Through support from advisors, mentors, the Rutgers Technology Transfer ... , Visikol’s path from an idea to a successful biotech company has been ...
Breaking Biology Technology:
Cached News: