Mobile version

Crustaceans off Chile

Image of the Month - October 2011

Number of copepod found by m² with geostrophic currents from altimetry superimposed for two different species. One of the species is more abundant closer to the coast while the other is more abundant in open oceanic waters(Credits Universidad de Concepción, Chile)

The Humboldt current system is one of the most fertile ocean area, caracterized by a cold current, and a strong upwelling off the coasts of South America. Quite a number of marine species are flourishing there, including copepods, very small (~1-2 mm long) crustaceans which are a dominant  component of the zooplankton in all oceans.

During an oceanographic campaign, zooplankton samples were taken  (top 100 m depth) off central Chile and analyzed. These data were used  to map the abundance of copepods, as total and by species, and to  associate them with satellite-monitored environmental data, including  geostrophic currents computed from altimetry. It seems that mesocale features, such as eddies, contribute to the  dispersal of some of the copepod species away from the coast (up to 500  km). This type of information enable us to better understand plankton  distribution and with it the most basic part of marine food webs.

 

 

Photographs of some of the copepod species studied (left Centropagesbrachiatus, middle Nannocalanus minor, right Calanoides patagoniensis). These small crustacean are about 1 or 2 mm long. (Credits Dr. Ruben Escribano Centro COPAS, Universidad de Concepción, Chile)

See also:

References

  • Morales, C.E., M.L. Torreblanca, S. Hormazabal, M. Correa, S. Nuñez, P. Hidalgo. 2010. Mesoscale structure of copepod assemblages in the coastal transition zone and oceanic waters off central-southern Chile. Progress in Oceanography 84, 158-173
EnglishFrançaisEspañol
Rss feedsContactSitemapPartnersFAQGlossaryLexiconMobile
You must enable cookies in your browser preferences to save the modifications
You are using an older version of Internet Explorer, please update to take full advantage of Aviso+ features

Customize the home page

View all widgets
Reduce display
Public profile
User profile

Select/Deselect widgets

Discover AVISO+

Customizable home, reading tools, products search guide, etc.. Discover step by step the features of the new site AVISO+.

Customizable homepage

The new home page is composed of blocks called "widgets".

Rearrange the blocks with a "Click & Drop".

Hide a widget with the cross at the top right. Reset or add a widget with the "wrench" icon. The "User" and "Public" profiles offer a predefined organization.

All the modifications are automatically saved as cookies on your machine so as to enable you to have your own specific AVISO+.

Reading tools

Ease your reading by choosing the page background colour (black/white) and/or by modifying the font size.

Browsing menu and breadcrum trail

To ease your browsing through AVISO+, you can use at any time the main banner items with the interactive submenus or use the browsing menu on the left side of the screen (it is open by default). For more readiness of the page contents, you can fold and unfold the browsing menu by clicking on the tab. At any time you can know where you are thanks to the browsing menu or the breadcrum at the top of the page.

Products search guide

The first submenu of the "Data" banner item leads you to a new search form enabling you to find quickier the product that suits your needs. The list of results is updated according to your selection criteria.

AVISO+ Multimedia

The first submenu of the "Multimedia" banner item leads you to AVISO+ collections of images and videos linked to altimetry and its applications. Have a nice visit!