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:
*Name:
*Comment:
*Email:


(Date:3/29/2019)... ... ... In the wake of the success of IBBL’s international ... was launched in July 2018, in an agreement between IBBL, the International Society ... Association (BBCMBA). The one-year pilot programme offered two testing schemes: ‘DNA quantification and ...
(Date:3/29/2019)... ... March 29, 2019 , ... GenCure has selected G-CON Manufacturing, ... facility. The new facility, which will anchor the VelocityTX innovation center in San ... manufacturing capabilities to support clinical cell therapy trials. GenCure is a subsidiary of ...
(Date:3/26/2019)... ... March 26, 2019 , ... ... introduce the four recipients of the Society's 2019 Outstanding Achievement Award, Outstanding New ... will be presented at the ASGCT 22nd Annual Meeting . , Outstanding ...
Breaking Biology News(10 mins):
(Date:4/10/2019)... ... April 10, 2019 , ... ... locked into multiple agreements to help companies advance their innovations to clinical ... ranging from synthetic biology companies that are gene editing therapeutic cells for ...
(Date:4/9/2019)... ... , ... Sonny Bar Lisa, or Sonny for short, is a quarter horse ... a series of diagnostics, an MRI was performed which revealed Sonny had torn his ... found that VetStem Regenerative Cell Therapy may be a treatment option for ...
(Date:4/8/2019)... SAN FRANCISCO (PRWEB) , ... April 08, 2019 , ... ... to accredited investors a $15 million preferred equity investment in the privately held pharmaceutical ... dysfunction. Its leading drug, Lorexys, is targeted at female hypoactive sexual dysfunction disorder and ...
(Date:4/4/2019)... ... April 03, 2019 , ... LeadingBiotech, an exclusive ... dialogue, today announces its Boston CEO conference to be held May 28-29, 2019 ... and opportunities with high-level panels and discussions from past, present and future change-makers. ...
Breaking Biology Technology:
Cached News: