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Title
  • en Metabolism and chemical composition of phyllosoma larvae, with special reference to the tropical rock lobster Panulirus ornatus (Decapoda; Palinuridae)
Creator
    • en Smith, G.
    • en McKinnon, A.D.
    • en Hall, M.
Accessrights open access
Subject
  • Other en Ammonia excretion
  • Other en CN composition
  • Other en O:N ratio
  • Other en Oxygen consumption
  • Other en Panulirus ornatus
  • Other en Phyllosoma
  • NDC 660
Description
  • Abstract en Rates of oxygen consumption and ammonia excretion and chemical composition (water, ash and CN composition) were determined throughout larval development, from Stages I–IX, of Panulirus ornatus phyllosoma larvae raised in the laboratory. Dry mass (DM) specific oxygen consumption rates varied from 1.4 to 3.3 μl O2 (DM)−1 h−1, showing a pattern of developmental decline. In contrast, specific ammonia excretion rates fluctuated irregularly from 0.02 to 0.067 μg NH4–N (DM)−1 h−1, yielding oxygen consumption to ammonia excretion ratios (O:N atomic ratio) as wide as 51–180. With progressive development, ash decreased from 34% to 17% of DM while C composition increased from 33% to 41% of DM. No consistent changing pattern with development was seen for water contents (74–83% of WM), N composition (6.9–9.5% of DM) and C:N ratios (4.0–5.1). Supplemental data of both specific oxygen consumption and ammonia excretion rates of laboratory-raised Stage III P. homarus and wild Parribacus antarcticus phyllosoma (stage unknown) of this study and literature data on phyllosomas of other lobster species by previous workers were shown to be comparable to those of P. ornatus phyllosomas when the differences in DM and temperature were taken into account. No appreciable differences due to the origin of the specimens, whether wild or laboratory-raised, were evident. Comparison of the present results with those of stomatopod larvae and holoplanktonic crustaceans in the same tropical marine habitats revealed that phyllosoma larvae are characterized by somewhat lower DM specific oxygen consumption rates and N composition. The study revealed markedly reduced ammonia excretion rates in phyllosomas, suggesting reduced swimming activity and preferential utilization of dietary protein to somatic growth rather than metabolism.
Publisher en Elsevier
Date
    Issued2011-08-31
Language
  • eng
Resource Type journal article
Version Type AM
Identifier HDL http://hdl.handle.net/2115/59739
Relation
  • isVersionOf DOI https://doi.org/10.1016/j.jembe.2011.05.022
Journal
    • PISSN 0022-0981
      • en Journal of Experimental Marine Biology and Ecology
      • Volume Number405 Issue Number1-2 Page Start80 Page End86
File
Oaidate 2023-07-26