Navigation Links
Vital ocean prey play active role in environment

Although Antarctic krill (Euphausia superba) are one of the best-studied organisms of the open sea, key aspects of their life cycle have remained murky.

Understanding krill is important because they are vital prey for fish, birds, and marine mammals, yet they are vulnerable to fishing pressure and environmental change. In the February 2006 issue of BioScience, the monthly journal of the American Institute of Biological Sciences, Stephen Nicol of the Australian Antarctic Division presents a new conceptual model of the species' life history that emphasizes krill's active role in exploiting a highly seasonal environment.

Nicol's model separates the species into different life stages: larvae, juveniles, gravid females, and other adults. These groups are believed to remain geographically separate. In summer, adults remain close to the edge of the continental shelf, which allows them access to open-water food supplies. Females carrying eggs move offshore to deep water to spawn, where the embryos sink. The embryos hatch into free-swimming larvae at depth, then swim upward over the course of several weeks. The larvae are at this stage dependent on microorganisms found on the underside of sea ice for food, and as they grow they drift with pack ice. After they metamorphose in late winter and early spring, the juveniles move with the currents back to inshore waters. In summer, the juveniles are found inshore of the adults. The life cycle thus keeps krill in younger stages separate from adults, which reduces competition for food and lessens the chance that adults will prey on younger stages. Further studies of krill can lead to an improved picture of the Southern Ocean ecosystem, Nicol writes.


'"/>

Source:American Institute of Biological Sciences


Page: 1

Related biology news :

1. Vital step in cellular migration described by UCSD medical researchers
2. NASA study finds snow melt causes large ocean plant blooms
3. Anammox bacteria produce nitrogen gas in oceans snackbar
4. Elephant seal pups suffer from ocean warming
5. Currents could disrupt ocean food chain
6. Scientists discover global pattern of big fish diversity in open oceans
7. Microbe has huge role in ocean life, carbon cycle
8. Genetics links whale to two different ocean basins
9. Climate change will affect carbon sequestration in oceans, model shows
10. Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect
11. Understanding the oceans microbes is key to the Earths future
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Vital ocean prey play active role environment

(Date:8/22/2014)... to purchase fuel cell cars from Toyota and other ... cars will run on hydrogen made from natural gas, ... Now scientists at Stanford University have developed a low-cost, ... produce hydrogen by water electrolysis. The battery sends ... water into hydrogen and oxygen gas. Unlike other water ...
(Date:8/21/2014)... BLOOMINGTON, Ind. -- A new study of American ... partner, men have the highest orgasm rates. On ... time, with their sexual orientation making little difference. ... On average, women experience orgasm 62.9 percent of ... -- and this pattern varies with women,s sexual ...
(Date:8/21/2014)... to dandruff, eczema and other itchy, flaky maladies in ... reachesincluding Hawaiian coral reefs and the extreme environments of ... in the scientific journal PLOS Pathogens considers ... the genus Malassezia in light of new ... the world. , University of Hawai,i at Mānoa scientist ...
Breaking Biology News(10 mins):Stanford scientists develop a water splitter that runs on an ordinary AAA battery 2Stanford scientists develop a water splitter that runs on an ordinary AAA battery 3Orgasm rates for single women less predictable than men's, vary by sexual orientation 2Orgasm rates for single women less predictable than men's, vary by sexual orientation 3Orgasm rates for single women less predictable than men's, vary by sexual orientation 4From dandruff to deep sea vents, an ecologically hyper-diverse fungus 2
... Athene Donald has won the Science and Technology award ... honor to Professor Donald, Glamour magazine praised her as a ... real path for herself in the male-dominated world of physics." ... Physics at the University of Cambridge in the United Kingdom ...
... CAA researcher at Charles Drew University of Medicine and Science ... a promising, natural therapy for cancer. Dr. Mamdooh Ghoneum ... on "Cell Death Mechanism," sponsored by the American Association for ... San Diego. "The central focus of the meeting ...
... RIVERSIDE, Calif. Stem cell research at the University of ... establishment of a new Stem Cell Core Facility (SCCF) ... doing stem cell research that ordinarily would not be available ... Noel Keen Hall, had its grand opening on Friday, Jan. ...
Cached Biology News:Charles Drew cancer studies with yeast yield excellent results 2UC Riverside's new state-of-the-art technology to accelerate stem cell research 2
(Date:8/21/2014)... VIEW, Calif. , Aug. 21, 2014 /PRNewswire/ ... properties and behaviors based on external stimuli such ... poised to have a disruptive effect in multiple ... revolutionize the business landscape by printing objects ranging ... aerospace and automotive sectors. Logo - ...
(Date:8/21/2014)... Louis, MO (PRWEB) August 21, 2014 ... full service biopharmaceutical contract development and manufacturing organization ... by Progenics Pharmaceuticals, Inc., an oncology company focused ... and treating cancer, to manufacture the anti-prostate specific ... PSMA ADC product candidate. Under the agreement ...
(Date:8/20/2014)... N.C. , Aug. 20, 2014 ... research services located in Raleigh, NC ... Bradford Evans as Vice President of Administration. ... Brad will oversee all corporate processes, including their ... joining Clintrax Global, Brad worked as an HR ...
(Date:8/20/2014)... succeeded in measuring vibrational motion of a single molecule ... vibration of a single molecule differs from the behaviour ... performed at the University of California, Irvine, where post-doctoral ... as a visiting fellow under professor Vartkess A. Apkarian, ... was lead by Professor Eric O. Potma. The results ...
Breaking Biology Technology:Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 2Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 3Frost & Sullivan: 4-D Printing to Usher in Age of Low-Labor, Fast-Paced Product Manufacturing 4Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 2Gallus Enters Agreement with Progenics Pharmaceuticals, Inc. for Manufacture of Anti-PSMA Monoclonal Antibody 3Clintrax Global, Inc. Announces Addition to Executive Team 2Seeing a molecule breathe 2
... , SEATTLE, Dec. 6 A challenge donation from the ... total to more than $7 million for Fred Hutchinson Cancer Research ... during which guests raise their bid cards for specific contribution levels, ... work to harness the human immune system to battle cancer. ...
... , NEW YORK, Dec. 4 Stemline Therapeutics, Inc. ... agents, SL-401 and SL-501, in both in vitro and ... for poster presentation at the upcoming 51st Annual Meeting of the ... from December 5-8, 2009. The poster will be presented by Stemline,s ...
... Dec. 3 VIA Pharmaceuticals, Inc. (Nasdaq: VIAP ), ... the treatment of cardiovascular and metabolic disease, today announced that ... 2 FDG-PET clinical trial of VIA-2291. , The FDG-PET ... sites in the US and Canada including Massachusetts General Hospital, ...
Cached Biology Technology:34th Annual Hutch Holiday Gala Raises More Than $7 Million For Cancer Research 234th Annual Hutch Holiday Gala Raises More Than $7 Million For Cancer Research 3Stemline Therapeutics Announces Poster Presenting in vivo and Anti-Cancer Stem Cell Activity of SL-401 against Chronic Myeloid Leukemia (CML) at the 51st Annual Meeting of the American Society of Hematology (ASH) 2VIA Pharmaceuticals Completes Patient Visits in Phase 2 Trial of VIA-2291 2VIA Pharmaceuticals Completes Patient Visits in Phase 2 Trial of VIA-2291 3VIA Pharmaceuticals Completes Patient Visits in Phase 2 Trial of VIA-2291 4
... offers a full length insert sequencing service ... cosmids and fosmids. Agencourt utilizes unique ... libraries. There are several features that ... data with rapid turnaround including our patented ...
...
... Cytometry The Guava EasyCyte system is ... multiparameter cytometer with built-in 96-well microplate sampling ... plates of cells and compounds quickly and ... tubes or having the carryover issues found ...
A flexible 24-48 hour DNA sequencing service. Samples may be shipped in standard 1.5mL tubes. Oligo synthesis and DNA preparation available. Read lengths up to 850 Phred 20 bases. Universal primers p...
Biology Products: