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Effects of feeding regime on growth rate in the Mediterranean Sea anemone Actinia equina (Linnaeus)
Chomsky, O.; Kamenir, Y.; Hyams, M.; Dubinsky, Z.; Chadwick-Furman, N.E. (2004). Effects of feeding regime on growth rate in the Mediterranean Sea anemone Actinia equina (Linnaeus). J. Exp. Mar. Biol. Ecol. 299(2): 217-229
In: Journal of Experimental Marine Biology and Ecology. Elsevier: Tokyo; Oxford; New York; Lausanne; Shannon; Amsterdam. ISSN 0022-0981, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Chomsky, O.
  • Kamenir, Y.
  • Hyams, M.
  • Dubinsky, Z.
  • Chadwick-Furman, N.E.

Abstract
    Polyps of Actinia equina are the most common sea anemones in the rocky intertidal zone of the Mediterranean coast of Israel, where they occur in one of the southernmost populations of this species in the northern hemisphere. We examined effects of feeding rate on polyp growth at ambient sea temperature for this population. Under laboratory conditions, polyps were left unfed, or were fed with brine shrimp (Artemia) once every 2 weeks, once a week, or twice a week. Of the four experimental treatments, only feeding twice a week resulted in polyp growth; under all other regimes, the sea anemones lost body mass. We conclude that a high rate of feeding is required at sea temperatures in the eastern Mediterranean, where these sea anemones may have high metabolic rates relative to more northern populations.

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