Spatial and temporal variation in otolith chemistry for tautog (Tautoga onitis) in Narragansett Bay and Rhode Island coastal ponds
The elemental composition of otoliths may provide valuableinformation for establishing connectivity between fish nursery grounds and adult fish populations. Concentrationsof Rb, Mg, Ca, Mn, Sr, Na, K, Sr, Pb, and Ba were determinedby using solution-based inductively coupled plasma mass spectrometry in otoliths of young-of-the year tautog(Tautoga onitis) captured in nursery areas along the Rhode Island coast during two consecutive years. Stable oxygen (δ18O) and carbon (δ13C) isotopic ratios in young-of-the year otoliths were also analyzed with isotope ratio mass spectrometry. Chemical signatures differed significantlyamong the distinct nurseries within Narragansett Bay and the coastal ponds across years. Significant differenceswere also observed within nurseries from year to year. Classification accuracy to each of the five tautog nursery areas ranged from 85% to 92% across years. Because accurateclassification of juvenile tautog nursery sites was achieved, otolith chemistry can potentially be used asa natural habitat tag.
| Main Authors: | , , , , , |
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| Format: | article biblioteca |
| Language: | English |
| Published: |
2010
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| Subjects: | Biology, Ecology, Fisheries, |
| Online Access: | http://hdl.handle.net/1834/25403 |
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