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Feeding strategies and diet composition of four Antarctic cnidarian species
Orejas, C.; Gili, J.-M.; López-González, P.J.; Arntz, W.E. (2001). Feeding strategies and diet composition of four Antarctic cnidarian species. Polar Biol. 24(8): 620-627. dx.doi.org/10.1007/s003000100272
In: Polar Biology. Springer-Verlag: Berlin. ISSN 0722-4060, more
Peer reviewed article

Keywords
    Diet; Diets; Feeding behavior; Feeding behaviour; Recycling; Recycling; Recycling; Anthomastus bathyproctus Bayer, 1993 [WoRMS]; Clavularia frankliniana Roule, 1902 [WoRMS]; Cnidaria [WoRMS]; Oswaldella antarctica (Jäderholm, 1904) [WoRMS]; Tubularia Ralphi Bale, 1884 [WoRMS]; PSE, Antarctica [Marine Regions]; Marine

Authors  Top 
  • Orejas, C.
  • Gili, J.-M.
  • López-González, P.J.
  • Arntz, W.E.

Abstract
    The diet of four species of Antarctic cnidarians, two hydroids and two anthozoans, was investigated. One hydroid, Tubularia ralphii, and one anthozoan, Anthomastus bathyproctus, seem to basically consume zooplankton whereas the other hydroid species, Oswaldella antarctica, has a diet mainly based on the fine fraction of seston. The last cnidarian investigated, the stoloniferan alcyonacean, Clavularia cf. frankliniana, feeds mainly on resuspended material. The wide range of diets of these Antarctic cnidarians indicates opportunistic behaviour by feeding on different sources and taking advantage of the available food sources. Data related to low C/N ratios in the sediment and high NO2 concentrations in areas with dense communities of benthic suspension feeders, along with data on capture rates, lead us to hypothesize that these organisms play an important role in the recycling processes of organic matter in Antarctic benthic ecosystems.

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