Age and growth of two genera of deep-sea bamboo corals (Family Isididae) in New Zealand waters

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Tracey, D. M., Neil, H., Marriott, P., Andrews, A. H., Cailliet, G. M., & Sanchez, J. A. (2007). Age and growth of two genera of deep-sea bamboo corals (Family Isididae) in New Zealand waters. Bulletin of Marine Science, 81(3), 393-408.
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TitleAge and growth of two genera of deep-sea bamboo corals (Family Isididae) in New Zealand waters
AuthorsD. Tracey, H. Neil, P. Marriott, A. Andrews, G. Cailliet, J. Sanchez
AbstractWe provide a detailed description of growth zone counts at two locations in the skeletal structure of four bamboo coral colonies (Family Isididae, sub-family Keratoisidinae, genera Lepidisis spp. and Keratoisis sp. from New Zealand). Zone counts were made microscopically on skeletal cross-sections of calcareous internodes producing counts of up to 90 for Lepidisis spp. and 160 for Keratoisis sp. Scanning Electron Microscope (SEM) images taken of cross-sections at the junction of the calcareous internode and gorgonin node revealed clear zone resolution and produced counts that were substantially higher (a maximum 490 zones). Lead-210 dating was applied to the skeletal structure of one specimen of Lepidisis sp. to develop an independent estimate of age and growth. Radial micro-sampling of the skeletal carbonate indicated the age of the colony at the largest section (7.4 mm average radius) was 43 yrs old (26-61 yrs 95% CI), with an average radial growth rate of 0.18 mm yr -1 (0.13-0.29 mm yr-1 95% CI). Comparisons between the three age estimates for Lepidisis sp. were made and it was hypothesized that zones observed by light microscope have a bi-annual periodicity and that SEM-observed zones at the nodal juncture may represent an environmental event, such as lunar periodicity. © 2007 Rosenstiel School of Marine and Atmospheric Science of the University of Miami.
JournalBulletin of Marine Science
Date2007
Volume81
Issue3
Start page393
End page408
ISSN0007-4977
Subjectsage, age determination, bamboo, colony, comparative study, coral, deep sea, growth, lead-lead dating, periodicity, skeleton, Australasia, New Zealand, Anthozoa, Isididae, Keratoisis, Lepidisis, Lepidisis sp.
NoteCited By (since 1996):25, Invertebrates, CODEN: BMRSA

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