Relationships between water and paddlefish Polyodon spathula dentary elemental and stable-isotopic signatures: potential application for reconstructing environmental history
- Southern Illinois Univ., Carbondale, IL (United States). Center for Fisheries, Aquaculture and Aquatic Sciences
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Environmental Sciences Division
- North Dakota Game and Fish Dept., Bismarck, ND (United States)
The objectives of this study were to characterize relationships between water and paddlefish Polyodon spathula dentary Sr:Ca, δ18O and stable hydrogen isotope ratio (δD) to determine the accuracy with which individual P. spathula could be assigned to their collection locations using dentary-edge Sr:Ca, δD and δ18O. A laboratory experiment was also conducted to determine whether dentary Sr:Ca in age 0 year P. spathula would reflect shifts in water Sr:Ca to which fish were exposed. Significant linear relationships between water and dentary Sr:Ca, δD and δ18O were observed, although the relationship between water and dentary δ18O was weaker than those for Sr:Ca and δD. Classification success for individual fish to collection locations that differed in water Sr:Ca, δD and δ18O ranged from 86 to 100% based on dentary-edge Sr:Ca, δD and δ18O. Dentary Sr:Ca increased significantly in laboratory-reared age 0 year P. spathula following 4 weeks of exposure to elevated water Sr:Ca; dentary Sr:Ca of fish held in water with elevated Sr:Ca was also significantly higher than that of control fish reared in ambient laboratory water. Results indicated that P. spathula dentaries reflect water signatures for commonly-applied natural chemical markers and strongly suggest that dentary microchemistry and stable-isotopic compositions will be applicable for reconstructing P. spathula environmental history in locations where sufficient spatial differences in water chemistry occur.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC05-00OR22725
- OSTI ID:
- 1408604
- Journal Information:
- Journal of Fish Biology, Vol. 90, Issue 2; ISSN 0022-1112
- Publisher:
- Wiley - Fisheries Society of the British IslesCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Natal environments of age‐0 paddlefish in the middle Mississippi River inferred from dentary microchemistry
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journal | August 2019 |
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