SS1.02 Geochemical Tracers in Calcified Structures: Implications for Fisheries Research
Date: Tuesday, June 11, 2002
Location: Poster Session - VCC
 
Telmer, K, , SEOS, University of Victoria, Victoria, Canada, ktelmer@uvic.ca
Castonguay, M, , Institut Maurice-Lamontagne, Quebec, Canada, castonguaym@dfo-mpo.gc.ca
GallagherLC, SEOS, University of Victoria, Victoria, Canada, lauriem@uvic.ca
Friedland, K, , University of Massachusetts, Amherst, USA, friedlandk@forwild.umass.edu
 
COMPARISON OF A HIGH-RESOLUTION TEMPERATURE RECORD TO OTOLITH MICROCHEMISTRY FOR ATLANTIC COD (GADUS MORHUA)
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Otolith microchemistry potentially contains a high-resolution record of fish life history, possibly recording changes in water chemistry and temperature on daily time scales. There has been debate in the literature regarding fluctuations of the Element:Ca ratio (where Element = any of several cations), and its relation to salinity versus temperature changes. We investigate the relationship between water temperature and Element:Ca in Atlantic Cod by comparing a high-resolution temperature record, acquired every 4 hours for 631 days, to a high resolution Element:Ca profile acquired by Laser Ablation ICP-MS. This fish was 54 cm when captured in LaPoile, southwestern Newfoundland on 10 Nov 1999. The fish was recaptured in Burgeo on southwestern Newfoundland on 1 August 2001 making its estimated age about 6 years old at capture and 8 years old at recapture. The resolution of the ICP-MS data is estimated to be weekly.