Cookies Policy
X

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

DIRECT OBSERVATIONS OF THE BEHAVIOR OF EUPHAUSIA SUPERBA AND EUPHAUSIA CRYSTALLOROPHIAS (CRUSTACEA: EUPHAUSIACEA) UNDER PACK ICE DURING THE ANTARCTIC SPRING OF 1985

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

Access this article

+ Tax (if applicable)
Add to Favorites
You must be logged in to use this functionality

image of Journal of Crustacean Biology

ABSTRACT Direct field observations using SCUBA were made of Euphausia superba and Euphausia crystallorophias under the pack ice off Enderby Land, and aspects of their behavior were recorded using still, video, and cine photography. Swarms of E. superba were generally composed of 20-50 individuals (range 5-1,000), of which >90% were seen feeding on algae growing on the undersurface of the ice. Euphausia crystallorophias formed larger swarms that occupied the region approximately 1-5 m below the ice. Preliminary fecal and ice algal composition analyses indicate that E. superba feeds selectively on certain species of epontic algae and that the two euphausiid species do not compete directly for the same food source under the ice. Although a range of escape responses was displayed by both species, E. superba reacted generally with an individual back-flip response and E. crystallorophias with a coordinated pleopod swimming response. The adaptive significance of the range of responses in relation to swarm size and density and the proximity of the predator/disturbance is discussed by O'Brien (1987). Data from echo soundings combined with high resolution video images, obtained by lowering a camera into the scattering layer beneath the ship, revealed that adult E. crystallorophias undertake vertical migration at this time of the year. However, evidence from a night dive suggested that swarms of juveniles and subadults did not migrate, but maintained their daytime distribution under the ice during darkness. Swarm formation and maintenance at this time of year are discussed in relation to feeding behavior in E. superba.

Loading

Full text loading...

/content/journals/10.2307/1548293
Loading

Data & Media loading...

http://brill.metastore.ingenta.com/content/journals/10.2307/1548293
Loading

Article metrics loading...

/content/journals/10.2307/1548293
1987-01-01
2016-12-06

Sign-in

Can't access your account?
  • Tools

  • Add to Favorites
  • Printable version
  • Email this page
  • Subscribe to ToC alert
  • Get permissions
  • Recommend to your library

    You must fill out fields marked with: *

    Librarian details
    Your details
    Why are you recommending this title?
    Select reason:
     
    Journal of Crustacean Biology — Recommend this title to your library
  • Export citations
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation