A 200-year archaeozoological record of Pacific cod (Gadus macrocephalus) life history as revealed through ion microprobe oxygen isotope ratios in otoliths
| Autor: | Thomas E. Helser, Craig R. Kastelle, Takayuki Ushikubo, Reinhard Kozdon, Aron L. Crowell, John W. Valley, Ian J. Orland |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Archeology Microprobe biology δ18O 010604 marine biology & hydrobiology Aragonite Pacific cod engineering.material biology.organism_classification 010603 evolutionary biology 01 natural sciences medicine.anatomical_structure Oceanography medicine engineering Gadus 14. Life underwater Transect Bay Geology Otolith |
| Zdroj: | Journal of Archaeological Science: Reports. 21:1236-1246 |
| ISSN: | 2352-409X |
| Popis: | We measured δ18O values in modern and archaeological Pacific cod (Gadus macrocephalus) otoliths recovered from Aialik Bay on the Pacific coast of the Kenai Peninsula, Alaska, using a high precision ion microprobe. Values of δ18O were measured in as many as sixty 10-μm spots along 2–3 mm transects from the otolith core to its margin with high spot-to-spot analytical precision (δ18O ± 0.3‰). We obtained sample densities along a linear transect that were at least 2 to 3 times greater than micromilling/conventional mass spectrometry techniques. From modern Pacific cod otoliths (using in situ temperatures from electronic archive tags) we calibrated an empirical fractionation equation of aragonite δ18O to sea water temperature (r2 = 0.75, p |
| Databáze: | OpenAIRE |
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