Amazonian Catfish and Otolith (IMAGE)

SUNY College of Environmental Science and Forestry

Amazonian Catfish and Otolith

Caption

Top: Otolith (ear-stone) of an Amazonian giant catfish species that migrates from the estuary 2,000 miles to the headwaters of the Amazon River. Age increments are marked on the red line transect. Colors on the otolith indicate the ratios of strontium to calcium over the fish's lifetime; strontium is absorbed from the water. Bottom: The giant Amazonian catfish species described above.

Credit

Theodore W. Hermann, Karin E. Limburg, Donald J. Stewart, R. Barriga

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