Subject: Age determination

From: [email-masked] (Barbe Rousse)
Date: Tue, 25 Jun 1996 09:31:00 -0400

I have to determine the age of yellow perch speciemens. Is there anybody
who know how i should proceed (otoliths, scales, vertebraes etc.)?

Thanks in advance

Eric Forcier

[email-masked]

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From: Sean Clancy <[email-masked]>
Date: Tue, 25 Jun 1996 18:43:05 -0230

> who know how i should proceed (otoliths, scales, vertebraes etc.)?
Your best bet is to look at the otoliths.  Scales of the Yellow Perch are 
somewhat troublesome.

You may want to contact the Canadian Centre for Inland Waters,  they may 
have some information.

sean.

 Why does a dog lick itself?  Because it can!
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Sean Clancy,  BSc.                          __===////====//___    /|
Memorial University of Newfoundland        -  o               ---/|
St. John's,  Newfoundland. A1B 3X9        WWWW }}}------==========|     
Phone: (709) 737-8301        		    "====\\\______\\     \|

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From: "Jimmy H. Waddell" <[email-masked]>
Date: Fri, 28 Jun 1996 14:25:52 -0700

Barbe Rousse wrote:
> [email-masked] are the structure to use.  Depending on your specimens, whole, 
cracked, sectioned with or without burning.  Usually the otoliths must be 
broken, stuck in clay, covered with emmersion oil, then bring a light 
filament to the side of the otolith.  By moving your light and fosuc the 
annulli will appear as thin with lines. 
I would recommmend aging crappie, bass or walleye before trying Y perch.
-- 
Jimmy H. Waddell, Researcher
Coop Fish Mgt Res Lab
Southern Illinois Univ
Carbondale, IL 62901       618-536-7761

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From: Lawrence Taylor <[email-masked]>
Date: 29 Jun 1996 12:02:37 GMT

Hi

I worked on my MSc on yellow perch, Perca flavescens, but I don't recall 
any papers on age determination. I had to work with fish-of-the-year, so 
aging was not a problem. I have worked aging cod and haddock otoliths at 
day per day level. What sort of age resolution do you want? I'll go 
through my old papers and see what I can dig up.

Cheers Lawrence

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From: Serge Tremblay <[email-masked]>
Date: 3 Jul 1996 19:32:26 GMT

Je te suggere de communiquer avec mon collegue Yves Mailhot, 
biologiste a la direction regionale de la Mauricie, Environnement 
et Faune Quebec, Tel: 819-373-4442.

Il est responsable de la gestion de la perchaude au lac 
Saint-Pierre.

Salut
-- 
**************************************************************
Serge Tremblay, biologiste M.Sc.
Service de la faune aquatique
Direction de la faune et des habitats
Ministere de l'Environnement et de la Faune du Quebec
150, boul. Rene-Levesque est (5e etage)
Quebec (Quebec)
Canada
G1R 4Y1

Tel.: (418) 643-5469
FAX: (418) 646-6863

Adresse Internet: [email-masked]
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Re: Age determination