Navigation Links
Male elephants woo females with precise chemistry

New Zealand.

Scientists have assumed that only one form of frontalin would be made by elephants, but by merely changing the ratios of frontalin's enantiomer composition, "you're actually changing the message signals, and you end up having a signal that is essentially different," Greenwood added. "It's not just a single message."

The research team analyzed secretion samples from six male elephants and found that the pheromone is first detectable in the late teens, with the quantity secreted rising about 15-fold over a 25-year life span. Young males secreted significantly more of the "plus" frontalin than "minus," but the ratios became almost equal as the elephant matured, especially between ages 31 and 43.

Musth periods get longer as the males age, according to the study, and, importantly, the enantiomeric composition of the frontalin secreted is almost equal in the middle part of a musth episode, a period of prime signaling by male elephants. In contrast, at the end of the physiologically exhausting musth episode, the ratio becomes more varied so that at the end of musth, the ratio is askewed toward the minus enantiomer, allowing other males and females to detect the ending of musth.

The team then tested the effect the various enantiomer ratios had on the elephants. They examined ovulating or "follicular" females, and females that were either pregnant or in a non-reproductive "luteal" phase. They also tested young and old males. It found that low concentrations of frontalin, represented when the enantiomer ratio is more "plus" than "minus," was of mild interest to both young and old males, but when the ratio became balanced - equal amounts of plus and minus frontalin - males of all ages, as well as luteal-phase and pregnant females, were repulsed. Only ovulating females were attracted.

The study's results indicate that the ratio of frontalin enantiomers allows other elephants to distinguish both the maturity of male elepha
'"/>

Source:Oregon Health & Science University


Page: 1 2 3

Related biology news :

1. Genetic analysis of Asian elephants in India reveals some surprises
2. WWF peeks into mysterious life of Borneos pygmy elephants
3. Drunken elephants: The marula fruit myth
4. Serengeti patrols cut poaching of buffalo, elephants, rhinos
5. Mother birds increase progesterone to hatch females
6. New study explores beetle species with two forms of females
7. Male rivalry increases when females at most fertile, say researchers
8. Brain differences could explain why males and females experience pain relief differently
9. UCLA study finds same genes act differently in males and females
10. Choosy females make colourful males
11. Zebra finch males prefer females with exaggerated maternal traits
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Male elephants woo females with precise chemistry

(Date:7/9/2014)... fungal pathogens pose a greater threat to biodiversity ... of amphibians, bats, corals, bees and snakes. New ... in the prestigious journal Nature reveals ... to a deadly chytrid fungus implicated in global ... important because it is the basis of vaccination ...
(Date:7/9/2014)... Guelph scientist that involved fitting bumblebees with tiny ... neonicotinoid pesticide hampers bees, ability to forage for ... professor in Guelph,s School of Environmental Sciences, and ... July 9 in the British Ecological Society,s journal ... how long-term pesticide exposure affects individual bees, day-to-day ...
(Date:7/9/2014)... fever but often can be defeated with antibiotics and ... beat. Now, scientists have built a new weapon against such ... the journal ACS Applied Materials & Interfaces , their ... of them than medicine alone. , David Leong, Jianping Xie ... wait, undetectable in the human body or in places that ...
Breaking Biology News(10 mins):USF study: Amphibians can acquire resistance to deadly fungus 2Bee foraging chronically impaired by pesticide exposure: Study 2
... why a tuberculosis vaccine is not as effective for some ... not work as well for some as they do for ... issue of the Journal of Leukocyte Biology ( ... common environmental bacterium found in soil and water, can decrease ...
... State University have solved a long-standing conundrum about ... way into limestone, sand grains, mussel shells, coral ... According to the lead investigator, ASU professor ... what is "at the heart of an erosive ...
... New Rochelle, NY, November 30, 2010Access to quality reproductive ... aspect of a woman,s human rights, freedom, equity, and ... on Global Women,s Reproductive Health in the current issue ... by Mary Ann Liebert, Inc., explores the compelling medical, ...
Cached Biology News:Blame the environment: Why vaccines may be ineffective for some people 2Mystery dissolves with calcium pump discovery 2Mystery dissolves with calcium pump discovery 3Ensuring the rights of women worldwide to reproductive health care 2
(Date:1/15/2014)... 2013 was a banner year of continued ... saw continued independent research led by the team at ... $1 million grant from the Susanne Marcus Collins Foundation, ... peer reviewed journal, Amy Grant highlighted Brainwave Optimization® in ...
(Date:1/15/2014)... TAIPEI , Jan. 15, 2014 TaiGen Biotechnology ... an exclusive agreement with R-Pharm, a leading Russian pharmaceutical ... in the Russian Federation , ... Commonwealth Independent States (CIS). Nemonoxacin is a novel antibiotic for ...
(Date:1/14/2014)... Diego, CA (PRWEB) January 14, 2014 ... on the products of cells grown under simulated embryonic ... international license agreement with Suneva Medical, Inc. for physician-dispensed ... (CCM). , This agreement is an amendment ...
(Date:1/14/2014)... (PRWEB) January 14, 2014 EquitiesIQ, a ... Inc. (OTCQB: ALQA). Alliqua is an emerging biomedical company ... the wound care market. , Free report download: ... with a seasoned management team and Board, which launched ...
Breaking Biology Technology:Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 2Dynamic Innovative Technology Showcased at Scottsdale Company’s Open House 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 2TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 3TaiGen Biotechnology Signed Exclusive License Agreement with R-Pharm for Nemonoxacin (Taigexyn(R)) 4Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 2Histogen and Suneva Medical Expand License for Cell Conditioned Media-based Aesthetic Products Internationally 3EquitiesIQ Initiates Coverage of Alliqua, Inc. 2EquitiesIQ Initiates Coverage of Alliqua, Inc. 3
... ("CTI") (Nasdaq and MTA: CTIC) announced today that it has been ... posted by Russell Investments on June 29, 2009 on ... and global equity indexes on an annual basis. , ... largest U.S. stocks as of the last trading day of May, ...
... Corp. (Nasdaq: BSTC ), a biopharmaceutical company developing ... added to the Russell 3000 and Russell 2000 Indexes effective ... 2009. The Russell family of U.S. indexes is reconstituted annually ... investable U.S. equity market. , , The Russell 3000 ...
... Micromet, Inc. (Nasdaq: MITI ), a ... of cancer, inflammation and autoimmune diseases, today announced that ... part of the annual reconstitution of the Russell indexes, ... "Investors recognize the Russell 3000 as an established benchmark ...
Cached Biology Technology:Cell Therapeutics Added to Russell 3000(R), Russell 2000(R) and Russell Global(R) Indexes 2Cell Therapeutics Added to Russell 3000(R), Russell 2000(R) and Russell Global(R) Indexes 3BioSpecifics Technologies Corp. Added to Russell 3000 and Russell 2000 Indexes 2Micromet Added to Russell 3000 Index 2Micromet Added to Russell 3000 Index 3Micromet Added to Russell 3000 Index 4
PHOTOMAN DIRECT COPY CAMERA, 1 EA. Category: Nucleid Acid Detection Systems....
Recombinant Human Erythropoietin (Tissue Culture Grade)...
One-step, microplate or cuvet, colorimetric, detection range 0.78 ug/dL to 65 ug/dL Zn in serum, plasma, urine, saliva etc. Procedure: 10 min....
Human PDGF R beta MAb (Clone # PR7212)...
Biology Products: