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Energy Flux in the South Tyrrhenian Deep-sea Ecosystem: Role of Mesopelagic Fishes and Squids

  • A. Granata
  • G. Brancato
  • O. Sidoti
  • L. Guglielmo

Abstract

We here review various studies concerning the ecology of mesopelagic organisms in the South Tyrrhenian Sea and other oceans to direct attention to the importance of mesopelagic animals within the context of meso- and epi-pelagic food webs. The results of recent studies on the micronekton in the South Tyrrhenian Sea were examined (Marabello 1994; Guglielmo et al. 1995), together with the relationship between immense populations of vertically migratory fishes and squids and the fixed resident population of more surface and deeper waters. The review summarizes the present state of knowledge on migratory activity related to trophic purposes of mesopelagic fishes and on the diet of squids, tunas and other large predators. The conclusions seem to confirm the hypothesis of a trophic connection between cephalopods and mesopelagic fishes. They also elucidate the fundamental role of cephalopods as a top link in the trophic chain of mesopelagic fishes. The hypothesis of a trophic chain characterised by cephalopods, mesopelagic fishes and crustaceans, with cephalopods acting as a connection between surface and mesopelagic trophic webs, is discussed.

Keywords

Trophic Chain Mesopelagic Fish Epipelagic Zone Mesopelagic Zone Mesopelagic Species 
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.

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Copyright information

© Springer-Verlag Italia 2001

Authors and Affiliations

  • A. Granata
    • 1
  • G. Brancato
    • 1
  • O. Sidoti
    • 1
  • L. Guglielmo
    • 1
  1. 1.Dipartimento di Biologia Animale ed Ecologia MarinaUniversità di MessinaMessinaItaly

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