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Has anyone experienced toxicity problems while marking otoliths with
alizarin complexone?
I recently immersed a batch of cichlid juveniles in an aerated freshwater
solution of 0.2 gram/L Alizarin complexone. After 5 hours many of the fish
were swimming erratically, rolling over onto their backs, etc. I performed
repeated water changes over a couple hours. Most recovered witihin 24
hours, but I experienced ~10% mortality.
Any experienced Alizarin users with insights into what I may have done
wrong is encouraged to reply! (solution too strong? immersion time too
long?)
Note-Alizarin solution was made up fresh from a container of powder only 4
months old. Water was fresh and aged to remove chlorine.
Thanks!
J. Jasper Lament
Department of Biology,
University of Miami,
Coral Gables, FL
33124-0421
Office Phone: (305) 284-4933
Fax: (305) 284-3039
E-mail:
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