Polar Biology

, Volume 26, Issue 7, pp 474–485

Size-related dietary changes observed in the squid Moroteuthis ingens at the Falkland Islands: stomach contents and fatty-acid analyses

  • Katrina L. Phillips
  • Peter D. Nichols
  • George D. Jackson
Original Paper

DOI: 10.1007/s00300-003-0509-9

Cite this article as:
Phillips, K.L., Nichols, P.D. & Jackson, G.D. Polar Biol (2003) 26: 474. doi:10.1007/s00300-003-0509-9
  • 142 Downloads

Abstract

Dietary composition of the onychoteuthid squid Moroteuthis ingens at the Falkland Islands was related to predator size, as shown by stomach contents and fatty-acid analyses. Comparisons were made between two size classes of squid: those of mantle length <200 mm and those of mantle length >200 mm. Smaller squid had frequently consumed crustaceans and cephalopods; fish were of secondary importance. Larger squid consumed mostly fish and moderate amounts of cephalopods, but had rarely consumed crustaceans. These findings were supported by comparisons drawn between digestive-gland fatty-acid profiles and the fatty-acid profiles of potential prey species. Fatty-acid analyses indicated that the crustaceans Euphausia lucens, Munida gregaria and Themisto gaudichaudii were important prey items of smaller squid, whereas stomach content and fatty-acid analyses indicated that Gymnoscopelus nicholsi of around 100 mm standard length represented much of the fish prey of larger squid.

Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  • Katrina L. Phillips
    • 1
  • Peter D. Nichols
    • 2
    • 3
  • George D. Jackson
    • 1
  1. 1.Institute of Antarctic and Southern Ocean StudiesUniversity of TasmaniaHobartAustralia
  2. 2.CSIRO Marine ResearchHobartAustralia
  3. 3.Antarctic CRCUniversity of TasmaniaHobartAustralia

Personalised recommendations