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:4/6/2017)... , April 6, 2017 Forecasts ... ANPR, Document Readers, by End-Use (Transportation & Logistics, Government ... Oil, Gas & Fossil Generation Facility, Nuclear Power), Industrial, ... Other) Are you looking for a definitive ... ...
(Date:4/5/2017)... , April 4, 2017 KEY FINDINGS ... anticipated to expand at a CAGR of 25.76% during ... diseases is the primary factor for the growth of ... report: https://www.reportbuyer.com/product/4807905/ MARKET INSIGHTS The global ... product, technology, application, and geography. The stem cell market ...
(Date:3/30/2017)... March 30, 2017  On April 6-7, 2017, Sequencing.com ... Genome hackathon at Microsoft,s headquarters in ... will focus on developing health and wellness apps that ... Hack the Genome is the first hackathon for ... world,s largest companies in the genomics, tech and health ...
Breaking Biology News(10 mins):
(Date:7/24/2017)... Lawrence, MA (PRWEB) , ... July 24, 2017 , ... ... (TET-SL) has been accepted by the National Conference on Interstate Milk Shipments (NCIMS) Laboratory ... its Pilot Program, set to launch July 1, 2017. , The NCIMS voted at ...
(Date:7/24/2017)... ... July 24, 2017 , ... ... today announced that the stock market news outlet had initiated coverage on ... testing that screens and identifies exposure, progression and risk analysis from specific ...
(Date:7/20/2017)... , ... July 20, 2017 , ... Dr. Asher Kimchi, ... winning recipients of the 2017 IAC Awards at the 22nd World Congress on Heart ... also named four faculty to receive the Distinguished Fellowship Awards. , Dr. Asher Kimchi, ...
(Date:7/20/2017)... ... July 20, 2017 , ... Corista, a leader in ... intelligence Tuesday, July 25, during the Association of Pathology Chairs’ Jubilee Meeting in ... , Baras, Associate Director of Pathology Informatics, will present “The Digital Pathology Experience ...
Breaking Biology Technology:
Cached News: