Navigation Links
Some like it hot: The role of heat in sea lampreys' sex lives
Date:6/27/2013

'Is it hot in here or is it just you?' Clichd chat-up lines may serve some humans well, but other animals prefer more imaginative ways to captivate and attract potential suitors. Take, for example, the male sea lamprey, which will coax ovulating females into its nest by releasing enticing pheromones. Once comfortably in the nest, the male will then perform an interesting dance routine, rubbing the female's belly with a small bump of tissue on his back. Should the female be happy with what she sees and feels, the two will then spawn their gametes simultaneously. This unusual courtship routine is well characterised but no one is quite sure what role this bump, called rope tissue, plays in the proceedings. 'We thought it's just a structure that was used for some kind of mechanical stimulation that they needed to trigger the female to lay eggs', says Yu-Wen Chung-Davidson, from Michigan State University, USA, who has been studying lampreys for 10 years. However, she wasn't sure if this was the case, and so Chung-Davidson and her colleagues decided to investigate. They publish their findings in The Journal of Experimental Biology that rope tissue is a heat-generating secondary sexual trait -- the first of its kind ever identified

To begin her investigation, Chung-Davidson simply looked at the rope tissue under the microscope, and what she saw surprised her: 'It looked opaque, and it looked like fat to me.' Explaining her next step, she says, 'I happened to have tissues from various life stages of these lampreys and so I compared them and it's very interesting. When they are in the immature state, the male and females look more or less the same. But when I looked in the mature males and females, they were very different. So there's very obvious sexual dimorphism in their morphology and this part of their body.'

When Chung-Davidson delved deeper, looking at
'/>"/>

Contact: Michaela Handel
michaela@biologists.com
44-012-234-25525
The Company of Biologists
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Malawi trial saves newborn lives
2. New NHCPS App, CertAlert+, Makes Health Care Providers’ Lives Much Easier
3. Austerity cuts to Spanish healthcare system are putting lives at risk
4. Smartphones, drones, to save lives in Malawi
5. Radioimmunotherapy could extend lives of advanced lymphoma patients
6. Partial livers from deceased donors saving the lives of infants
7. Merck for Mothers Supports UNICEF’s Efforts to Help Save Lives in South Africa
8. Kaufman Shows People With Diabetes How to Use New Technology to Improve Their Lives
9. New Emergency Stroke Treatments Can Save and Restore Lives if Patients Act Quickly and Call 911
10. Mercy's Digital Hospital Records Save Lives in Joplin
11. Mom+Social Highlights the Power of Social Media to Improve the Lives of Families and Communities Around the World
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/23/2014)... researchers have identified an important enzyme pathway that helps ... few chromosomes, a condition that has been directly linked ... professor of biochemistry, found that near the end of ... that ensures any breaks in DNA are fully repaired ... to daughter cells. This process helps safeguard against some ...
(Date:4/23/2014)... internal surface area of the gastro-intestinal tract has long ... meters. Scientists at the Sahlgrenska Academy have used refined ... "Actually, the inner surface of the gastro-intestinal tract is ... scientist Lars Fndriks. , The digestive tract, which passes ... the intestines, has a length of about 5 meters ...
(Date:4/23/2014)... which patients might suffer potentially fatal side-effects from a ... brain scans using pattern recognition software similar to that ... developed by researchers at Imperial College London. Results of ... used the software are published in the journal ... million people each year worldwide. Ischemic strokes are the ...
(Date:4/23/2014)... MD (April 23, 2014) The American Gastroenterological ... the 2014 AGA Research Scholars. The AGA Research ... investigators to develop independent and productive research careers ... Scholar Awards fund an additional year allowing for ... committed to supporting junior faculty who are paving ...
(Date:4/23/2014)... often displayed in the popular Swedish children,s TV ... high-sugar foods. A new study from the University ... children,s TV programmes as well as the link ... weight status. , Steingerdur Olafsdottir,s doctoral thesis focuses ... Swedish children,s TV show Bolibompa. Healthy foods dominated ...
Breaking Medicine News(10 mins):Health News:Study identifies enzymes that help fix cancer-causing DNA defects 2Health News:The surface area of the digestive tract 'only' as large as a studio apartment 2Health News:Airport security-style technology could help doctors decide on stroke treatment 2Health News:Airport security-style technology could help doctors decide on stroke treatment 3Health News:AGA announces 2014 Class of AGA Research Scholars 2Health News:High-calorie and low-nutrient foods in kids' TV 2
... suffering encountered by men who underwent surgery for hernia was ... delayed surgeries and felt almost no symptoms, after a period ... were also reported to be the same. Most men who ... either minimally symptomatic or asymptomatic. They usually wait until the ...
... doctors and pharmacists in the U.S. are not aware that ... drugs of the same brand name or a similar sounding ... U.S. Food and Drug Administration (FDA) //said medication name mix-ups ... buying and using the wrong medicine. ...
... 12 babies born in New South Wales are due to ... obstetricians working at the private hospitals. ,About 25% ... drugs to initiate labour. // ,The doctors when asked ... as they want that particular doctor to handle their pregnancy. ...
... upset and has sent a letter to the acting head of ... letter he had asked the FDA to provide a full account ... reveled that the tainted tissues were used for the patients in ... into the matter about the case of the Brooklyn funeral home ...
... incidence of Polio in Bihar state has led to much ... state stands unparalled with respect to the number of polio ... for provision of polio drops to children less than 5 ... recently. ,National Cadet Corps volunteers embarked on ...
... The Royal National Institute of Deaf People with collaboration with ... aims at checking the hearing capacity of 28 million people ... is estimated that more than 4 million people in United ... to be treated which requires early diagnosis. ,The ...
Cached Medicine News:Health News:Drug Name Confusion Makes Imports Dangerous: FDA 2Health News:New trend of birth induction is on the rise 2Health News:Bihar Health Officials Worried As Polio Cases Soar 2
(Date:1/15/2014)... , Jan. 15, 2014  A novel wearable injector slightly larger ... painless for patients to self-inject prescription drugs in the large ... cancer, blood diseases, autoimmune deficiencies, and genetic disorders.  ... to $220B by 2018, according to analysts.   Many of these ...
(Date:1/14/2014)... 2014  Luminex Corporation (Nasdaq: LMNX ) today announced ... of 2013 on Monday, February 3, 2014. A press release ... of trading. (Logo: http://photos.prnewswire.com/prnh/20100104/LUMINEXLOGO ) ... operating highlights and financial results for the fourth quarter and ...
(Date:1/14/2014)... 2014 The Brandeis Medical Center, led by Dr. Emmanuel ... and affordable laser tattoo removal experience with the advanced Astanza Duality ... providing high quality cosmetic services with cutting edge medical technology and ... Southern California has seen a dramatic increase in the ...
Breaking Medicine Technology:Enable Injections Presents A New Class of Injectors for Drug Delivery at PEPTalk, Drug Delivery Partnership Meetings 2Luminex Corporation Fourth Quarter Earnings Release Scheduled for February 3, 2014 2Luminex Corporation Fourth Quarter Earnings Release Scheduled for February 3, 2014 3Beverly Hills Physician Features Tattoo Removal with the Astanza Duality Laser, Offers $99 Special 2
... June 1, 2011 Mirixa Corporation is pleased to ... licensing agreement for MirixaEdge(SM), a clinical application that supports ... Medication Therapy Management (MTM). Family Physicians Group (FPG), ... Source Pharmacy and selected it as FPG,s preferred pharmacy ...
... (Nasdaq: NKTR ) President and Chief Executive Officer, ... 2011 Global Healthcare Conference at The Grand Hyatt New York ... The presentation will be accessible via a ... Calendar section of the Nektar website http://www.nektar.com . This ...
Cached Medicine Technology:MirixaEdge(SM) to be Licensed by One Source Pharmacy, LLC 2MirixaEdge(SM) to be Licensed by One Source Pharmacy, LLC 3Nektar Therapeutics' President and CEO Howard W. Robin to Present at the Jefferies 2011 Global Healthcare Conference in New York 2Nektar Therapeutics' President and CEO Howard W. Robin to Present at the Jefferies 2011 Global Healthcare Conference in New York 3
Our soft guedel airway is clear and has a color coded bite block. Airway has a smooth finish and is Latex Free. Recommended for single use. Non-Sterile....
New - Color Coded Berman Airways. A simple idea makes size identification easier for you., ,Premium upgrade without a premium price. Color Coded Berman airways are latex-free., ,Plastic. Single use...
... Fome-Cuf® Oral/Nasal Wire Reinforced Endotracheal Tube ... is packaged individually and includes a ... Device (CMD™), and 15 mm ISO ... maximum patient safety by helping to ...
... Portex® Blue Line® uncuffed ... Magill or Murphy styles, in ... ,Blue Line® adult and pediatric ... from implant-tested polyvinyl chloride with ...
Medicine Products: