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:1/20/2019)... ... January 16, 2019 , ... January has been a record-breaking month ... Not only has the company already hosted several of its signature cooking classes and ... and Janssen Pharmaceuticals, later this month. , Since 2008, Lajollacooks4u’s team-building events have ...
(Date:1/20/2019)... ... January 18, 2019 , ... Boston-based Laboratory as a ... in an effort to better express its continued expansion and service offerings for biotech ... a new kind of lab: one that is more agile and adaptable than ever ...
(Date:1/14/2019)... ... January 14, 2019 , ... Join the live ... hear about key topics in data quality, including:, ,     State ... engagement ,     Smartphone and wearable based performance measures ,     Data quality ...
Breaking Biology News(10 mins):
(Date:1/24/2019)... ... January 22, 2019 , ... ... has its own set of assumptions, and RFP creation and management generally requires ... is like comparing apples to oranges. These challenges can ultimately lead to study ...
(Date:1/20/2019)... ... January 16, 2019 , ... On January 15 of ... news article by Asymmetrex director James L. Sherley, M.D., Ph.D. The ... resources like the PGCB and CellTrials.org. Now in its 21st year of operation, ...
(Date:1/20/2019)... ... January 17, 2019 , ... Today, ... the launch of a specialized automation technology, titled Automate 3D. Automate 3D, produced ... of models and drawings to deliver to end-users, customers, and ERP systems. ...
(Date:1/15/2019)... ... , ... With the U.S. Congress designating January as Cervical Health Awareness Month , ... tips to help reduce the risk of Cervical Cancer. , Cervical cancer is ... #1 most common STD and an STI that almost half of all American ...
Breaking Biology Technology:
Cached News: