Regional variation in diet may be an underappreciated modulator of mercury uptake in species of concern: A case study using Alligator Gar (Atractosteus spatula)
Zachary S. Moran,
Michael T. Penrose,
George P. Cobb
et al.
Abstract:We compared mercury (Hg) and stable isotopic ratios of nitrogen (δ15N) in a long-lived apex predator, Alligator Gar (Atractosteus spatula), from a coastal region of the Brazos River exposed to high aerial Hg deposition, to an inland population exposed to moderate Hg deposition, in order to test the relative importance of biomagnification through trophic dynamics and aerial deposition rates in an apex predator. We used generalized linear models (GLMs) to examine the effects of fish size (Length, mm) and Region … Show more
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