Subject: Age and growth analysis

From: "Kenneth D. Ham" <[email-masked]>
Date: 23 Jan 1996 18:38:45 GMT

Is anyone using a computerized system that automatically 
finds annuli in scales or otoliths of fish. I have seem 
prototypes, but never used one myself. I would be 
interested to hear what you are using and how well 
it works. In particular, I would like to know how much
human intervention or oversight is required to get
acceptable results.

Kenneth D. Ham
[email-masked]

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From: Lawrence Taylor <[email-masked]>
Date: 25 Jan 1996 02:51:21 GMT

I have worked on juvenile cod and haddock otoliths in the past at the 
Bedford Institute of Oceanography, Dartmouth, Nova Scotia. We made daily 
growth ring counts and digitized rings on a PC-video-microscope system. 
I just finished a contract where adults of the same species were being 
caught. These otiliths were imbedded in a plastic resin, cut into thin 
sections and counted manually. A good contact would be Dr. Steve Campana 
at the Bedford Intitute. Otoliths are his specialty. If you are 
interested, I can give you his work number if you e-mail me.

Lawrence
[email-masked]