Polar Biology

, Volume 5, Issue 1, pp 35–41 | Cite as

Profile analysis of Euphausia superba larvae vertical distribution in the Scotia Sea, related to time factor

  • Enrique R. Marschoff
Article
Received:
Accepted:

Summary

The vertical distribution of Euphausia superba larvae caught during the January–February 1981 cruise of BIP Dr Eduardo L Holmberg to the Scotia Sea, was studied by means of the multivariate linear model. The profile analysis technique was applied to vertical distribution of different stages, using a variable composed by counts at each one of the four sampling depths. After the logarithmic transformation of data, this technique showed significantly larger numbers of larvae by night than by daytime in the upper 100 m. No significant differenc was found between 100 to 200 m, which was the lowest level sampled. No vertical migration was observed.

Younger larvae distributions suggest that ascending larvae were not present in significant quantities in the whole area. Net avoidance is proposed as the simplest explanation for night — day differences, in view that a supposed migration out of sampling limits in light hours, has no support in present or literature data.

Keywords

Migration Linear Model Vertical Distribution Sampling Limit Profile Analysis 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Baker A de C (1970) The vertical distribution of euphausiids near Fuerteventura, Canary Islands (Discovery Sond Cruise, 1965). J Mar Biol Ass UK 50:301–342Google Scholar
  2. Brinton E (1967) Vertical migration and avoidance capability of euphausiids in the California Current. Limnol Oceanogr 12:451–483Google Scholar
  3. Clutter RI, Anraku M (1968) Avoidance of samplers. In: Tranter DJ (ed) Zooplankton sampling. UNESCO, Paris, pp 57–76Google Scholar
  4. Fleminger A, Clutter RI (1965) Avoidance of towed nets by zooplankton. Limnol Oceanogr 10:96–104Google Scholar
  5. Fraser FC (1936) On the development and distribution of the young stages of krill (Euphausia superba). Discovery Rep 14:1–192Google Scholar
  6. Hempel I (1978) Vertical distribution of eggs and nauplii of krill (Euphausia superba) south of Elephant Island. Meeresforsch 27:119–123Google Scholar
  7. Hempel I (1981) Euphausiid larvae in the Scotia Sea and adjacent waters in summer 1977/78. Meeresforsch 29:53–59Google Scholar
  8. Makarov RR (1975) Vertical distribution of euphausiid eggs and larvae off the Northeastern coast of South Georgia Island. Oceanology 15:1101–1106Google Scholar
  9. Marr JWS (1962) The natural history and geography of the Antarctic krill (Euphausia superba, Dana). Discovery Rep 32:33–464Google Scholar
  10. Marschoff ER, Tomo AP (1984) Vertical distribution of Calyptopis larvae of Euphausia superba in the Scotia Sea. J Crust Biol 4:247–251Google Scholar
  11. Morrison DF (1976) Multivariate statistical methods. McGraw-Hill, Kogakusha, Tokyo, pp 1415Google Scholar
  12. Roger C (1971) Distribution verticale des euphausiacés (Crustacés) dans les courants équatoriaux de l'Océan Pacifique. Mar Biol 10:134–144Google Scholar
  13. Rustad D (1934) On the antarctic euphausiids from the “Norvegica” Expeditions 1929–1930 and 1930–1931. Sci Res Norw Antarct Exp 12:1–53Google Scholar
  14. Ruud JT (1932) On the biology of southern euphausiidae. Hvalradets Skr 2:1–105Google Scholar

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Enrique R. Marschoff
    • 1
  1. 1.Instituto Antártico ArgentinoBuenos AiresRepública Argentina

Personalised recommendations