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Subject: Re: Stock enhancement - wild vs. reared fish
From: Mario Lepage <[log in to unmask]>
Reply-To:Academic forum on fisheries ecology and related topics <[log in to unmask]>
Date:Tue, 6 May 1997 15:13:30 +0200

text/plain (61 lines)

At 11:19 06/05/97 +0200, you wrote:
Dear Tina,
                Do you know the EIFAC Technical Paper n° 42/suppl./1-2 about
a symposium held in Budapest in 1982 on "Stock enhancement in the management
of freshwater fish" ? If not, you might find some interresting examples of
stocking succes.


>And now to my request:
>- Does any of you have information on the causes of reared fish having a
lower survival
>than wild fish?
>If reared fish are incompetent with respect to feeding or avoiding
predation - what is
>then the reason? If these scills are inherited, reared fish should have the
>appropiate behavour as wild fish (at least if the breeding strain has been
caught in
>nature). But if fish must learn the right behaviour it is obvious why
reared fish have a
>lower survival. I know that the answer will probably differ among species,
but I am
>mainly interested in flatfish, gadids and salmonids.
>- Does anybody know of studies where fish have been reared in a way that
should promote
>the "right" behaviour after release?
>I have of course made searches in ASFA, but I could not find any recent
papers dealing
>with both stock enhancement and the developmental basis of behaviour.
>Any information will be appreciated.
>Tina Grønborg  - thesis student
>Univ. of Aarhus, Inst. of Biology, Dept. of Marine Ecology
>Finlandsgade 14, DK-8000 Aarhus C, Denmark
>E-mail: [log in to unmask]
Mario Lepage, biologiste                                                      
ASSOCIATION GIRONDINE POUR                      
50 av. de Verdun, B.P. 53                                  
33612 CESTAS cedex                                       
Tel: (33)  05                                        
Fax: (33) 05                                       
e-mail: [log in to unmask]      

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