Seasonality of human site occupation based on stable oxygen isotope ratios of cod otoliths |
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| Authors: | Anne Karin Hufthammer Hans Høie Arild Folkvord Audrey J Geffen Carin Andersson Ulysses S Ninnemann |
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| Institution: | 1. Natural History Collections, University of Bergen, Muséplass 3, N-5020 Bergen, Norway;2. Department of Biology, University of Bergen, N-5020 Bergen, Norway;3. Institute of Marine Research, P.O. Box 1870 Nordnes, N-5817 Bergen, Norway;4. Bjerknes Centre for Climate Research, Allégaten 55, N-5007 Bergen, Norway;5. Department of Earth Science, University of Bergen, Allégaten 41, N-5007 Bergen, Norway |
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| Abstract: | Oxygen isotope ratios (δ18O) were measured in micromilled samples of cod otoliths recovered from two Stone Age sites, one from Skoklefald, southeastern Norway and five from Skipshelleren, southwestern Norway. Discrete samples of otolith material were milled from the edge of the otolith towards the centre, each sample representing 3–4 weeks of growth. The δ18O values showed seasonal signals, covering a period 1–2 years prior to the time of capture. Isotope ratios at the edge of the otoliths, which is the material deposited at the time of fish capture, corresponded to the coldest seasonal water temperatures, in late winter or early spring. These data provide independent evidence for the season of use of the Skoklefald and Skipshelleren sites. |
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| Keywords: | Gadus morhua Norway δ18O Carbonate Micromilling Temperature |
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