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| Titel |
Determination of longevities, chamber building rates and growth functions for Operculina complanata from long term cultivation experiments |
| VerfasserIn |
Julia Woeger, Shunichi Kinoshita, Wolfgang Eder, Antonino Briguglio, Johann Hohenegger |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250123350
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| Publikation (Nr.) |
 EGU/EGU2016-2584.pdf |
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| Zusammenfassung |
| Operculina complanata was collected in 20 and 50 m depth around the Island of Sesoko
belonging to Japans southernmost prefecture Okinawa in a series of monthly sampling over a
period of 16 months (Apr.2014-July2015). A minimum of 8 specimens (4 among the smallest
and 4 among the largest) per sampling were cultured in a long term experiment that was set
up to approximate conditions in the field as closely as possible. A set up allowing
recognition of individual specimens enabled consistent documentation of chamber
formation, which in combination with μ-CT-scanning after the investigation period
permitted the assignment of growth steps to specific time periods. These data were
used to fit various mathematical models to describe growth (exponential-, logistic-,
generalized logistic-, Gompertz-function) and chamber building rate (Michaelis-Menten-,
Bertalanffy- function) of Operculina complanata. The mathematically retrieved maximum
lifespan and mean chamber building rate found in cultured Operculina complanata
were further compared to first results obtained by the simultaneously conducted
“natural laboratory approach”. Even though these comparisons hint at a somewhat
stunted growth and truncated life spans of Operculina complanata in culture, they
represent a possibility to assess and improve the quality of further cultivation set ups,
opening new prospects to a better understanding of the their theoretical niches. |
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