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RESEARCH ARTICLE
Contents Vol 56(5)

Retrospective determination of natal habitats for an estuarine fish with otolith strontium isotope ratios

James A. Hobbs A C , Qing-zhu Yin B , Jessica Burton A and William A. Bennett A
+ Author Affiliations
- Author Affiliations

A Bodega Marine Laboratory, University of California, Davis, John Muir Institute of the Environment, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.

B Department of Geology and UC Davis Interdisciplinary Center for Plasma Mass Spectrometry, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.

C Corresponding author. Email: jahobbs@ucdavis.edu

Marine and Freshwater Research 56(5) 655-660 https://doi.org/10.1071/MF04136
Submitted: 12 July 2004  Accepted: 20 April 2005   Published: 22 July 2005

Abstract

We investigated the ability of strontium isotope ratios (87Sr/86Sr) in otolith cores to record the natal habitats of juvenile delta smelt Hypomesus transpacificus from the San Francisco Estuary, USA. Young delta smelt (<60 days old) were collected during the California Department of Fish and Game 20-mm Survey in May and June of 1999 at several potential natal areas: Napa River, Suisun Marsh, West Delta, North Delta, Central Delta, South Delta and East Delta. The core region of sagittal otoliths was assayed with laser ablation-multicollector inductively coupled plasma mass spectroscopy. The laser ablation technique provided precise estimates of 87Sr : 86Sr ratios with relative standard deviation of 0.003% (one sigma). Isotope ratios ranged from 0.7065 to 0.708 and were different among natal habitats. However, natal habitats within the delta region were not discernable among each other, and reflect the mixing of the two major rivers, Sacramento River and San Joaquin River within the delta. We will therefore be able to determine natal habitats for delta smelt by assaying the core region of the otoliths. The application of strontium isotope ratios (87Sr/86Sr) in fish otoliths will greatly improve conservation efforts for this protected species.

Extra keywords: delta smelt, natal origins, otoliths, strontium isotopes.


Acknowledgments

The measurements were performed at the UC Davis Interdisciplinary Center for Plasma Mass Spectrometry (UCD-ICP-MS). Funding by NSF and UC Davis for the facilities is sincerely acknowledged. We thank the Central Valley Branch of the California Department of Fish and Game for assistance with sample collections and the Association of Bay Area Governments (ABAG) for funding. We also thank the anonymous reviewer for comments which greatly improved the manuscript. This work represents the UCD-ICP-MS contribution No. 0010 and Bodega Marine Laboratory contribution No. 2232.


References

Bennett, W. A. (2005). The population ecology of delta smelt in the San Francisco Estuary. Francisco Estuary and Watershed Science ,in press.
Bennett W. A., and Moyle P. B. (1996). Where have all the fishes gone? Interactive factors producing fish declines in the Sacramento–San Joaquin Estuary. In ‘San Francisco Bay: The Ecosystem’. (Ed. J. T. Hollibaugh.) pp. 519–542. (American Association for the Advancement of Science Pacific Division: San Francisco, CA.) Available online at http://www.sou.edu/AAASPD/TableContents/SFBayEco.pdf, verified June 2005.

Blum, J. D. , Taliaferro, E. H. , Weiss, M. T. , and Holmes, R. T. (2000). Changes in Sr/Ca, Ba/Ca and 87Sr/86Sr ratios between trophic levels in two forest ecosystems in the northeastern USA. Biogeochemistry 49, 87–101.
| Crossref | GoogleScholarGoogle Scholar | Dickin A. P. (1995). ‘Radiogenic Isotope Geology.’ (Cambridge University Press: Cambridge.)

Dove, S. G. , and Kingsford, M. J. (1998). Use of otoliths and eye lenses for measuring trace-metal incorporation in fishes: a bio-geographic study. Marine Biology 130, 377–387.
| Crossref | GoogleScholarGoogle Scholar | Kuivila K. M., and Moon G. E. (2004). Potential exposure of larval and juvenile delta smelt to dissolved pesticides in the Sacramento–San Joaquin Delta, California. In ‘Early life History of Fishes in the San Francisco Estuary and Watershed’. (Eds F. Feyrer, L. R. Brown, R. L. Brown and J. J. Orsi.) pp. 229–241. (American Fisheries Society: Bethesda, MD.)

Limburg, K. E. (1995). Otolith strontium traces environmental history of subyearling American shad Alosa sapidissima. Marine Ecology Progress Series 119, 25–35.
Simkiss K. (1974). Calcium metabolism of fish in relation to ageing. In ‘The Ageing of Fish’. (Ed. T. B. Begenal.) pp. 1–12. (Unwin Brothers: Surrey.)

Thompson, B. , Hoenicke, R. , Davis, J. A. , and Gunther, A. (2000). An overview of contaminant-related issues identified by monitoring in San Francisco Bay. Environmental Monitoring and Assessment 64, 409–419.
| Crossref | GoogleScholarGoogle Scholar | Winer B. J., Brown D. R., and Michels K. M. (1991). ‘Statistical Principles on Experimental Design.’ (McGraw-Hill: New York.)