Strontium to calcium ratios (Sr/Ca) of American shad otoliths
Detailed Description
Variation in American shad life history patterns illustrated through strontium to calcium ratios (Sr/Ca) of American shad otoliths from Columbia River, WA midsize fish (a-c), Columbia River, WA estuary fish (d-f), and Vancouver Island, British Columbia marine residents (g-i). Solid black lines indicate annuli; dashed black lines indicate the otolith edge. Higher Sr/Ca indicates marine (above 0.0010).
Sources/Usage
Public Domain.