HOME >> BIOLOGY >> NEWS
Cannibalism in the North Atlantic: Scripps researcher finds crustacean species keeps population in check by eating its young

Study is first to link adult female copepods and cannibalism in the open ocean

Using a combination of field samples from the Norwegian Sea and a new method for analyzing sea life populations, researchers have shown that tiny marine crustaceans called copepods use cannibalism as a mechanism to limit their population.

Traditional notions have assumed that fluctuations in marine populations can be explained mainly by physical processes. That is, if you understand ocean circulation and other physical functions affecting marine life, then you can understand how and why populations fluctuate. Other theories of marine populations are based on birth rates, including the processes of feeding and growth that lead to the production of new offspring.

Mark Ohman of Scripps Institution of Oceanography at the University of California, San Diego, and colleague Hans-Jrgen Hirche of the Alfred Wegener Institute for Polar and Marine Research in Germany, have provided evidence that there is much more to the story. Instead of birth rates, they flipped conventional notions and analyzed the death rates of copepods.

In their study, published in the August 9 edition of the journal Nature, Ohman and Hirche found that egg mortality in the copepod species Calanus finmarchicus is directly related to the abundance of females in the population.

"We found that a tenfold increase in adult egg-producing female copepods will not result in a similar increase in the number of surviving eggs," said Ohman, a professor in the Integrative Oceanography Division at Scripps. "Rather, half as many eggs will survive. We believe the reason is cannibalism and we think its a self-regulating mechanism that no one has found before in the open sea."

Copepods, tiny marine crustaceans (about four Calanus finmarchicus fit end to end on a dime), are the most numerous multicellular animals in the oceans, and possibly the most numerous on Earth. T
'"/>

Contact: Mario Aguilera or Cindy Clark
scrippsnews@ucsd.edu
858-534-3624
University of California - San Diego
8-Aug-2001


Page: 1 2 3

Related biology news :

1. Pacific Northwest team unveils largest virus proteome to date
2. Environmental issues center of Inland Northwest Research Alliance 4th Annual Symposium
3. Northeastern University receives $12.4 million NSF grant for creation of nanomanufacturing institute
4. Pacific Northwest National Laboratory gets $10 million from NIH to build virtual lung
5. North Shore-LIJ research collaboration with Correlogic Systems to advance ovarian cancer blood test
6. The Mediterranean connection: ecological effects of El Nio in the Northern hemisphere
7. Pearly mussels: One of North Americas natural jewels is disappearing
8. Institute for Systems Biology, Pacific Northwest National Laboratory announce collaboration
9. Pacific Northwest National Lab unveils most complete human blood-plasma proteome map to date
10. Fish, FRAMES and sticky chemicals net technology award for Pacific Northwest National Laboratory
11. Virginia Tech and North Carolina State University to run Forest Nutrition Research Cooperative

Post Your Comments:
(Date:2/10/2015)... -- Alere Inc. (NYSE: ALR), a global leader in ... quarter ended December 31, 2014. Namal ... said, "We made substantial progress in the fourth ... in rapid diagnostics and delivering against our financial ... early January enabled us to substantially reduce our ...
(Date:2/5/2015)... DIEGO , Jan. 26, 2015   Epic Sciences ... of cancer, today announced that Murali Prahalad , Ph.D., ... Personalized Medicine World Conference (PMWC) 2015: Silicon Valley, which ... Mountain View, Calif. on January 26-28, 2015. ... "CTCs Come of Age as Biomarkers." Last year, Epic Sciences ...
(Date:2/5/2015)... , Jan. 28, 2015 NXT-ID, Inc. (NASDAQ: ... "Company"), a biometric authentication company focused on the growing ... upcoming RedChip Global Online CEO Conference on January 29 ... Gino Pereira , CEO of NXT-ID will present ... product, the Wocket smart wallet and its full suite ...
Breaking Biology News(10 mins):Alere Inc. Announces Fourth Quarter 2014 Results 2Alere Inc. Announces Fourth Quarter 2014 Results 3Alere Inc. Announces Fourth Quarter 2014 Results 4Alere Inc. Announces Fourth Quarter 2014 Results 5Alere Inc. Announces Fourth Quarter 2014 Results 6Alere Inc. Announces Fourth Quarter 2014 Results 7Alere Inc. Announces Fourth Quarter 2014 Results 8Alere Inc. Announces Fourth Quarter 2014 Results 9Alere Inc. Announces Fourth Quarter 2014 Results 10Alere Inc. Announces Fourth Quarter 2014 Results 11Alere Inc. Announces Fourth Quarter 2014 Results 12Alere Inc. Announces Fourth Quarter 2014 Results 13Alere Inc. Announces Fourth Quarter 2014 Results 14Alere Inc. Announces Fourth Quarter 2014 Results 15Alere Inc. Announces Fourth Quarter 2014 Results 16Alere Inc. Announces Fourth Quarter 2014 Results 17Alere Inc. Announces Fourth Quarter 2014 Results 18Alere Inc. Announces Fourth Quarter 2014 Results 19Alere Inc. Announces Fourth Quarter 2014 Results 20Alere Inc. Announces Fourth Quarter 2014 Results 21Alere Inc. Announces Fourth Quarter 2014 Results 22Alere Inc. Announces Fourth Quarter 2014 Results 23Alere Inc. Announces Fourth Quarter 2014 Results 24Alere Inc. Announces Fourth Quarter 2014 Results 25Alere Inc. Announces Fourth Quarter 2014 Results 26Alere Inc. Announces Fourth Quarter 2014 Results 27Alere Inc. Announces Fourth Quarter 2014 Results 28Alere Inc. Announces Fourth Quarter 2014 Results 29Alere Inc. Announces Fourth Quarter 2014 Results 30Alere Inc. Announces Fourth Quarter 2014 Results 31Alere Inc. Announces Fourth Quarter 2014 Results 32Alere Inc. Announces Fourth Quarter 2014 Results 33Alere Inc. Announces Fourth Quarter 2014 Results 34Alere Inc. Announces Fourth Quarter 2014 Results 35Alere Inc. Announces Fourth Quarter 2014 Results 36
(Date:3/5/2015)... 5, 2015  UBM Medica US announces that ... online community to help oncologists and other clinicians ... available regarding the use of targeted therapies and ... March is National Kidney Cancer Awareness ... adjuvant treatment options for renal cell carcinoma (RCC) ...
(Date:3/5/2015)... Southlake, Texas (PRWEB) March 05, 2015 ... treatment of acute and chronic orthopedic conditions such ... runner’s knee, tennis elbow, and joint pain due ... also be administered during orthopedic surgeries to promote ... patented scientific advances in nearly pain-free bone marrow ...
(Date:3/4/2015)... March 04, 2015 USDM Life ... the life sciences industry, hired David Blewitt ... Cloud Compliance Services and Solutions at USDM Life ... based applications while maintaining compliance with government regulations worldwide. ... been an accomplished life sciences regulatory and IS compliance ...
(Date:3/4/2015)... March 04, 2015 Proove ... Personalized Medicine, is excited to announce the launch ... to Optimize the Management of Pain”. , The ... Medscape.com for the next year. The focus of ... to recognize inadequate pain treatments, integrate appropriate pain ...
Breaking Biology Technology:OncoTherapy Network Highlights Kidney Cancer Awareness Month 2OncoTherapy Network Highlights Kidney Cancer Awareness Month 3Riordan-McKenna Institute of Regenerative Orthopedics and Stem Cell Therapy Announces Open House in Southlake, Texas on Friday, March 6th from 5:30 pm to 7:30 pm. 2Riordan-McKenna Institute of Regenerative Orthopedics and Stem Cell Therapy Announces Open House in Southlake, Texas on Friday, March 6th from 5:30 pm to 7:30 pm. 3Riordan-McKenna Institute of Regenerative Orthopedics and Stem Cell Therapy Announces Open House in Southlake, Texas on Friday, March 6th from 5:30 pm to 7:30 pm. 4Riordan-McKenna Institute of Regenerative Orthopedics and Stem Cell Therapy Announces Open House in Southlake, Texas on Friday, March 6th from 5:30 pm to 7:30 pm. 5USDM Life Sciences Names David Blewitt VP of Cloud Compliance for Regulated Life Sciences 2USDM Life Sciences Names David Blewitt VP of Cloud Compliance for Regulated Life Sciences 3Proove Biosciences Launches CME Accredited Program with Medscape 2Proove Biosciences Launches CME Accredited Program with Medscape 3
Cached News: