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:


(Date:3/11/2016)... , March 11, 2016 ... market research report "Image Recognition Market by Technology (Pattern ... and Advertising), by Deployment Type (On-Premises and Cloud), by ... 2022", published by MarketsandMarkets, the global market is expected ... USD 29.98 Billion by 2020, at a CAGR of ...
(Date:3/9/2016)... 2016 This BCC Research report provides an ... RNA Sequencing (RNA Seq) market for the years 2015, ... and reagents, data analysis, and services. Use ... RNA-Sequencing market such as RNA-Sequencing tools and reagents, RNA-Sequencing ... affecting each segment and forecast their market growth, future ...
(Date:3/8/2016)...   Valencell , the leading innovator in ... secured $11M in Series D financing. The investment ... fund being launched by UAE-based financial services company ... TDF Ventures and WSJ Joshua Fund. Valencell plans ... growth and accelerate its pioneering innovation in accurate ...
Breaking Biology News(10 mins):
(Date:4/27/2016)... ... April 27, 2016 , ... Global Stem Cells ... of an Asia-Pacific Symposium as other research and development initiatives for potential stem cell ... and top Global Stem Cells Group executives began meeting to establish a working agenda ...
(Date:4/27/2016)... , April 27, 2016 ... research report with specific focus on US, EU, ... Japan , to the healthcare business intelligence ... library. Complete report on the Flow ... companies and supported with 282 tables and figures ...
(Date:4/26/2016)... ... 26, 2016 , ... BaseHealth , the comprehensive predictive ... as Chief Business Officer. Arianpour, a genomics pioneer and visionary commercial leader with ... recently Chief Commercial Officer of Pathway Genomics. He has held senior executive roles ...
(Date:4/26/2016)... Heidelberg, Baden-Württemberg (PRWEB) , ... April 26, 2016 ... ... production of laser lithography systems, announces the latest technology innovation for its Volume ... to fulfill tomorrow’s demand for production of advanced photomasks as well as a ...
Breaking Biology Technology: