000K  utf8
1100  $c2006
1500  eng
2050  urn:nbn:de:gbv:8-diss-16059
3000  Zumholz, Karsten
4000  The influence of environmental factors on the micro-chemical composition of cephalopod statoliths$hChristian-Albrechts-Universität zu Kiel  [Zumholz, Karsten]
4030  Kiel$nChristian-Albrechts-Universität zu Kiel
4209  In this thesis, the influence of different environmental factors on the chemical composition of cephalopod statoliths was investigated. On the basis of laboratory experiments under controlled conditions, it is now possible to qualify the influences of salinity, temperature and diet on the concentrations of several elements in the statoliths. Analytical results indicate that the incorporation of a number of elements is influenced by environmental factors. Barium and iodine appear to be the most suitable indicators for temperature. The suitability of statolith micro-chemistry for field-studies has been proven as well. Statolith trace element compositional zoning reflects very well the life history and ontogenetic habitat-shifts of the boreoatlantic armhook squid Gonatus fabricii. Further, this thesis gives valuable insights into the microstructure of statoliths and the elemental nano-scale distribution in daily increments. For the first time, the application of NanoSIMS NS50 provided distribution patterns of calcium, strontium and sodium in cephalopod statoliths with a spatial resolution of 400nm. The results of this study provide an essential basis for future investigations in the field, probably leading into further understanding of yet unknown migration patterns and spawning grounds of various cephalopod species.
4950  https://nbn-resolving.org/urn:nbn:de:gbv:8-diss-16059$xR$3Volltext$534
4961  https://macau.uni-kiel.de/receive/diss_mods_00001605
5051  570
5550  aragonite
5550  cephalopods
5550  gonatus
5550  LA-ICPMS
5550  migrations
5550  NanoSIMS
5550  sepia
5550  statolith
5550  synchrotron
5550  trace elements