Navigation Links
Whale sharks may produce many litters from 1 mating, paternity test shows
Date:8/24/2010

How do female whale sharks meet their perfect mates and go on to produce offspring? While little is known about the reproductive behavior of these ocean-roaming giants, a newly published analysis led by University of Illinois at Chicago biologist Jennifer Schmidt reveals new details about the mating habits of this elusive, difficult-to-study fish.

Schmidt, a UIC associate professor of biological sciences, determined paternity of 29 frozen embryos saved from a female whale shark caught off the coast of Taiwan in 1995. The embryos, studied in collaboration with Professor Shoou-Jeng Joung at the National Taiwan Ocean University, are extremely rare.

The pregnant shark carried a surprisingly large number of embryos -- 304 -- still in the uterus and representing a spectrum of age and development stages ranging from being still egg-encased to developed, near-term animals.

Schmidt and her colleagues spent several years developing DNA genetic markers to study whale sharks, initially for population genetics, but in this study the tool was used to determine paternity.

Shark reproduction is still an emerging science, but what is known suggests that most broods are sired by more than one male. That is not what Schmidt found with this particular female whale shark.

"These differently aged embryos -- itself unusual across animal species -- had the same father," Schmidt said. "We have to be very cautious in drawing conclusions from a single litter, but the data suggest female whale sharks store sperm after a single mating event, and subsequently fertilize their own eggs as they are produced."

If the finding can be supported from analysis of other whale shark litters, Schmidt said, "it would suggest that there is no whale shark breeding ground where large numbers of animals meet to mate, but rather that mating occurs as an isolated event."

Follow-up studies may be serendipity. International protocols protect whale s
'/>"/>

Contact: Paul Francuch
francuch@uic.edu
312-996-3457
University of Illinois at Chicago
Source:Eurekalert

Page: 1 2

Related biology news :

1. Blue whales align the pitch of their songs with extreme accuracy, study finds
2. Lone whales shout to overcome noise
3. UCLA biologists report how whales have changed over 35 million years
4. DNA analysis suggests whale meat from sushi restaurants in L.A., Seoul originated from Japan
5. Experts gather to solve mystery of largest recorded die-off of great whales
6. MMS and NOAA scientists study prey of Gulf of Mexico sperm whales
7. New study finds link between marine algae and whale diversity over time
8. New study suggests minke whales are not preventing recovery of larger whales
9. Zoning the ocean may help endangered whales to recover
10. Story of 4.5 million-year-old whale unveiled in Huelva
11. The pitch of blue whale songs is declining around the world, scientists discover
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/10/2015)... BOSTON and TELTOW, Germany ... SensoMotoric Instruments (SMI), a world leader in Eye ... the completion of its OEM Eye Tracking Platform for ... Eye Tracking Platform contains reference designs for seamless integration ... kiosk systems, virtual reality HMDs and augmented reality smart ...
(Date:8/6/2015)... SAN JOSE, Calif. , Aug. 6, 2015 ... the leading developer of human interface solutions, today ... and TouchPad technologies on Windows 10. Microsoft leveraged ... fundamental to the operating system. ... and drivers are fully certified with Microsoft,s Precision ...
(Date:8/4/2015)... , Aug. 04, 2015 ... http://www.researchandmarkets.com/research/nvh7k2/digital_forensics ) has announced the addition of ... (Hardware, Software, and Service), Sub-Segment (Computer Forensics, ... Forensics), Tool Types, Service, Vertical and Region ... to their offering. By Component ...
Breaking Biology News(10 mins):SMI Completes OEM Eye Tracking Platform to Cover All Consumer Displays 2SMI Completes OEM Eye Tracking Platform to Cover All Consumer Displays 3Synaptics Chosen for Human Interface Co-Development on Windows 10 2Digital Forensics Market - The Market Represents a Compound Annual Growth Rate (CAGR) of 11.3% From 2015 to 2020 2
... from the Herman B Wells Center for Pediatric Research at ... family of blood proteins that they hope holds a ... and adults. Their findings may one day help ... and other cancers of the blood. The researchers, led ...
... Swiss scientists conducted intensive studies of the Everest region ... valleys. Around the same time, the Swiss glaciologist Fritz ... above 5000 metres, studying and photographing the Himalayan glaciers. ... white photographs taken by these scientists are of immense ...
... may make us all go a little gooey, but it,s ... researchers at The Australian National University. The study ... ANU suggests that despite fears mothers may have that ... suggest that is true. The findings have been released as ...
Cached Biology News:On the trail of a targeted therapy for blood cancers 2'Himalaya -- Changing Landscapes' photo exhibition draws attention to the impacts of climate change 2'Himalaya -- Changing Landscapes' photo exhibition draws attention to the impacts of climate change 3Pregnancy not turning minds to mush: Study 2
(Date:9/1/2015)... WI (PRWEB) , ... September 01, 2015 , ... In ... Venice expertly transports the reader to a not-so-distant future faced with an Ebola pandemic ... beautiful professional who overcomes personal tragedy to enter the world of counterterrorism, and who ...
(Date:9/1/2015)... ... September 01, 2015 , ... VetStem Biopharma announces new Clinical ... joint problems can be caused by injuries and abnormalities of the cervical spine. ... or of the spinal cord itself. This can manifest itself as any or ...
(Date:9/1/2015)... ... September 01, 2015 , ... Leading CEOs, ... and pain management space join prominent academics and key investors for Neuro Advance ... Medical School in Boston. , Neuro Advance Boston focuses on the latest ...
(Date:9/1/2015)... N.C. , Sept. 1, 2015   ... to facilitating the relationship between doctors and patients, ... Durham, N.C. -based venture capital ... strength and business association with Bull City Venture ... Malik , Medfusion Founder and Executive Chairman. "Both ...
Breaking Biology Technology:Alexi Venice’s Debut Novel Takes on the Human Testing of a Vaccine for Ebola and Revenge by an Anti-Big Pharma Terrorist Group in ‘Ebola Vaccine Wars' 2Alexi Venice’s Debut Novel Takes on the Human Testing of a Vaccine for Ebola and Revenge by an Anti-Big Pharma Terrorist Group in ‘Ebola Vaccine Wars' 3VetStem Biopharma Announces New Clinical Research Program for Equine Cervical Facet Joint Disease 2VetStem Biopharma Announces New Clinical Research Program for Equine Cervical Facet Joint Disease 3Neuro Advance Boston Brings Together Leading Neuroscience Experts on October 14 at Harvard Medical School 2Medfusion Secures Funding to Continue Evolution and Advance Mobile Strategy 2Medfusion Secures Funding to Continue Evolution and Advance Mobile Strategy 3
... at the bottom of a bottle of mescal doesn,t mean ... liquor, according to scientists from the Biodiversity Institute of Ontario ... discovered that the liquid itself contains the DNA of the ... As part of a study to test their theory that ...
... Conference ... ... IntertechPira is pleased to announce the 5th annual Biopolymers Symposium 2010, scheduled for October ... program will bring together important players, key innovators and decision makers to examine the ...
... DIEGO , Feb. 9 Ardea Biosciences, Inc. (Nasdaq: ... Ph.D., has been appointed to the Company,s Board of Directors.  Dr. ... manager and advisor to the funds of Baker Brothers Investments, Ardea,s ... important company in our portfolio, so I am pleased to join ...
Cached Biology Technology:Mescal worm test shows DNA leaks into preservative liquids 2Dates Announced for IntertechPira's 5th Annual Biopolymers Symposium 2Dates Announced for IntertechPira's 5th Annual Biopolymers Symposium 3Ardea Biosciences Announces Appointment of Felix J. Baker, Ph.D. to Board of Directors 2Ardea Biosciences Announces Appointment of Felix J. Baker, Ph.D. to Board of Directors 3
ABCA1 Immunogen: Mouse ABCA1-expressing HeLa stable transfectants. Storage: -20 C, Avoid Freeze/Thaw Cycles...
Purified Mouse anti-Hu Actopaxin (pS8) Storage Temperature: Refrigerate(2 to 8C)...
Blank Calibration Particles, 3.0-3.4 mu m 5 ml...
Goat polyclonal to SIAH Interacting Protein ( Abpromise for all tested applications)....
Biology Products: