HI,
we ran a number of salmonid fish muscle and liver tissue samples for a small 
stream in Quebec and came across fairly high de13C values (around 15 per 
mil). I assume that terrestrial insects that rely on C4 plants are not an option 
in temperate regions. Does anyone know what food sources might have such 
high values, or could it be a physiological effect? I am open to any 
suggestions and speculations....
Thanks, Bjoern

Björn Wissel, PhD
EQAL Manager, Faculty of Science
Adjunct Professor, Department of Biology
265.2 Laboratory Building
University of Regina
Regina, SK S4S 0A2 Canada
phone    306 585-4890
fax      306 337-2410
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