Navigation Links
Ready for mating at the right time
Date:8/29/2014

te maturation. Thus the pheromones help to synchronize female spawning and external fertilization by the males and so to increase the odds of reproductive success.

Tilapias also show this behavior in captivity, which makes them an ideal model system for reproducible biological assays. Tina Keller-Costa and her colleagues at the Marine Science Center at the University of the Algarve in Faro, Portugal, as well as the Biosynthesis/NMR Research Group at the Max Planck Institute for Chemical Ecology in Jena, Germany, have now identified the chemical structure of the signaling molecules in tilapia males and studied their function. She collected urine samples from dominant males and purified the samples in several steps, testing them for biological activity as pheromones after each step.

Two steroids as main components in the urine

This procedure resulted in two pure substances whose chemical structures were elucidated using nuclear magnetic resonance spectroscopy (NMR). Their identity was confirmed by chemical synthesis: "The two structures are stereoisomers or mirror images of a pregnane-type steroid linked to glucuronic acid," Bernd Schneider, the head of the NMR lab in Jena, said, summarizing the results of the analysis.

Both males and females showed highly sensitive responses to the odor of these two steroids. Although the two pheromone components stimulate the hormonal system of the females and trigger spawning, they are not by themselves capable of reducing aggressive behavior in rival males. The researchers thus assume that the urine of dominant males must contain additional yet-to-be identified substances that contribute to this effect in a complex mixture.

Until now only very few fish pheromones have been chemically identified. "Our discovery will allow for further investigations, for example, of the mechanisms of perception and processing of these chemical signals by the brain in order to originate a respo
'/>"/>

Contact: Dr. Bernd Schneider
schneider@ice.mpg.de
49-364-157-1600
Max Planck Institute for Chemical Ecology
Source:Eurekalert  

Page: 1 2 3

Related biology news :

1. Single-cell parasites co-opt ready-made genes from host: UBC research
2. RedBrick Health Launches Open Integration and Partner Certification Program, Selects Fitbit, RunKeeper Among First to be "RedBrick Ready"
3. HALO: One-of-a-kind research aircraft ready for takeoff
4. Humans were already recycling 13,000 years ago
5. NYSCF scientists develop new protocol to ready induced pluripotent stem cell clinical application
6. Wistar receives $1.5 million Department of Defense grant to ready prostate drug for clinical use
7. Pizza perfect! A nutritional overhaul of junk food and ready-meals is possible
8. Children are significantly more likely to develop PTSD if the mother is already afflicted
9. Feeding by tourists compromises health of already-endangered iguanas, study finds
10. Museum bird DNA ready for use in Naturalis Biodiversity Center
11. Are we ready for contact with extraterrestrial intelligence?
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Ready for mating at the right time
(Date:12/5/2014)... 4, 2014  Tute Genomics, a leader in cloud-based ... Series A1 funding led by UK-based Eurovestech. Peak Ventures ... the investment round. "We are at a ... next-generation sequencing and seeks new approaches for the diagnosis, ... , MD MBA, and CEO of Tute Genomics. "One ...
(Date:12/3/2014)... , Dec. 2, 2014   Marvin ... deployed, innovative test solutions for military, aerospace, and ... version of its successful TS-900 PXI semiconductor ... and features of high-end systems to customers at ... value compared to traditional ATE. ...
(Date:11/21/2014)... 18, 2014 According to a ... Systems (Video, RFID, Access Control, Intrusion Detection, Parking Management, ... Government), Component Service Geography - Global Forecasts to 2020", ... projected to be around $25 Billion in 2014 and ... at a CAGR of 8.69%. Browse 116 ...
Breaking Biology News(10 mins):Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 2Tute Genomics Raises $2.3 Million to Scale Up Cloud-Based Genome Analytics and Accelerate Personalized Medicine 3Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 2Marvin Test Solutions Brings New Capabilities to PXI-Based Semiconductor Test with TS-960 3Industrial Security Systems Market Worth $38 Billion by 2020 2Industrial Security Systems Market Worth $38 Billion by 2020 3
... feature unique to humans and pets. Scientists at the ... trout have individual characters and show different personalities. ... the University of Gothenburg has for many years studied ... west coast of Sweden. "My results show that ...
... A new book, Illinois Birds: A Century of Change, literally ... birds in Illinois was conducted from 1906-1909. It was repeated ... two surveys. When the 100-year anniversary of that first survey ... Jeff Brawn seized the window of opportunity to do it ...
... tools that can grab individual strands of DNA and stretch ... unravel a mystery of modern genomics. Their latest findings, which ... about the physical makeup of odd segments of DNA that ... in a row. These mysterious "poly(dA) repeats" are sprinkled ...
Cached Biology News:New book on 100 years of Illinois birds 2New book on 100 years of Illinois birds 3New book on 100 years of Illinois birds 4Rice physicists help unravel mystery of repetitive DNA segments 2
(Date:12/24/2014)... CA (PRWEB) December 23, 2014 Pipette.com ... where their Twitter followers can submit their #HolidayInTheLab pictures ... and their lab mates. , For those struggling to ... mates, the Pipette.com Holiday in the Lab Contest provides ... Pipette.com Twitter followers to send pictures of their ...
(Date:12/24/2014)... Texas , Dec. 23, 2014 ... company focused on gynecologic disease, announced today that ... Schuler , Birchview Fund LLC and several Vermillion ... of unregistered shares of Vermillion,s common stock and ... stock in a private placement.  ...
(Date:12/24/2014)... 23, 2014 Sigma-Aldrich Corporation (NASDAQ: ... period under the Hart-Scott-Rodino Antitrust Improvements Act (HSR ... December 22, 2014, thereby completing the U.S. HSR ... acquisition of the Company by Merck KGaA, Darmstadt, ... another condition to closing the transaction, which remains ...
(Date:12/24/2014)... and NEW YORK , Dec. ... its open-label pilot study of mazindol in children with ... and Therapy in December 2014 . ... in children with attention deficit/hyperactivity disorder" ( Konofal et ... 2014 Dec 1;8:2321-2332. eCollection 2014 ) shows that ...
Breaking Biology Technology:Major Pipette Distributor Pipette.com Announces their Holiday in the Lab Contest 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 2Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 3Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 4Vermillion Announces Equity Financing of up to $18.9 Million; Suspends ATM Program 5Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 2Acquisition of Sigma-Aldrich by Merck KGaA, Darmstadt, Germany, Receives U.S. Antitrust Clearance 3Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 2Redefining ADHD: A New Approach & A Shift of Paradigm in ADHD Therapeutics 3
... Ltd. has announced that it has produced a synthetic H1N1 swine ... company has developed the vaccine based on the same Replikins peptide ... the current H1N1 outbreak/pandemic was on its way. , ... ...
... May 1 TorreyPines Therapeutics, Inc. (Nasdaq: TPTX ... March 31, 2009. For the three-month period, ... Cash and cash equivalents totaled $6.3 million at March 31, ... as its financial advisor to assist in the evaluation of ...
... 1 /PRNewswire-Asia/ -- Yongye Biotechnology International, Inc. (OTC Bulletin ... of plant and animal nutrient products located in the ... the independently owned Yongye branded retail stores in its ... sales.A Yongye branded retail store in Qianjiang City in ...
Cached Biology Technology:H1N1 Influenza "Swine Flu" Peptide Vaccine Now Available For Testing Worldwide 2TorreyPines Therapeutics Reports First Quarter 2009 Financial Results 2TorreyPines Therapeutics Reports First Quarter 2009 Financial Results 3TorreyPines Therapeutics Reports First Quarter 2009 Financial Results 4Yongye Biotechnology Distributor has Record Breaking Single Store Sales Day 2Yongye Biotechnology Distributor has Record Breaking Single Store Sales Day 3
... formulated to support the growth of cells ... eucalypti. The medium is a modification of ... cell lines established by Grace using this ... The basal medium, when properly supplemented, has ...
... Fixed clamp trays and ... Magnetic drive ... 25 mm amplitude ... ml to 2000 ml, including Fernbach ...
...
GLP expression profiling service on the Affymetrix platform. Starting material can be blood, tissue or RNA. 5 day turnaround. Standard and custom post analyses of microarray data available....
Biology Products: