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A general approach to the in situ energy budget of Eudendrium racemosum (Cnidaria, Hydrozoa) in the Western Mediterranean
Barangé, M.; Zabala, M.; Riera, T.; Gili, J.-M. (1989). A general approach to the in situ energy budget of Eudendrium racemosum (Cnidaria, Hydrozoa) in the Western Mediterranean, in: Ros, J.D. (Ed.) Topics in Marine Biology: Proceedings of the 22nd European Marine Biology Symposium, Barcelona, Spain, August 1987. Scientia Marina (Barcelona), 53(2-3): pp. 423-427
In: Ros, J.D. (Ed.) (1989). Topics in marine biology: Proceedings of the 22nd European Marine Biology Symposium, Barcelona, Spain, August 1987. European Marine Biology Symposia, 22. Scientia Marina (Barcelona), 53(2-3). 145-754 pp., more
In: European Marine Biology Symposia., more
Keyword
    Marine/Coastal
Authors  Top 
  • Barangé, M.
  • Zabala, M.
  • Riera, T.
  • Gili, J.-M.
Abstract
    An in situ energy budget of the hydropolyp Eudendrium racemosum (Cavolini, 1785) is presented. Ingestion and respiration rates and ammonium excretion were studied over two 24 h cycles, with two-hour sample intervals. The species ingested as much as 25.9 % of its own biomass per day (minimum rate). Respiration was 1.62 ml O2 g-1dw h-1 while excretion was 13.6 p.M NH4 g-1dw h-1. We estimated that the species increased its biomass at a rate of 9.6 % per day (Growth + Reproduction). This value is higher than those previously reported for other cnidarians. We can assume that the capacity of E. racemosum to survive-albeit for a limited period of the year-in the highly competitive shallow-water communities is based on its high growth rate.
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