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Subject: Re: Cylinders and Fish Larvae
From: Joan Manuel <[log in to unmask]>
Reply-To:Scientific forum on fish and fisheries <[log in to unmask]>
Date:Fri, 5 Mar 1999 08:29:02 -0400

TEXT/PLAIN (60 lines)

 This is a little off your question, but you might find it helpfull
anyway.  We made replicated mesocosms 60 cm diameter, 10 meters deep, for
a series of experiemnts at Dal.

1996.  Manuel J.L., Gallager S.M., Pearce C.M., Manning D.A., O'Dor R.K.
Larvae from different populations of Sea scallop (Placopecten
magellanicus) have different vertical migration patterns in 9-m deep
mesocosms.  Mar. Ecol. Prog. Ser. 142: 147-163

They were made of polyethylene, which can be purchased as contiuous
tubing, and can be ordered to a specific size.  4 mil plstic is too thin
and fragile, and with 8 mil plastic it is difficult to tie a knot in the
bottom tight enough to make it water tight (but can be done by dipping it
in hot water and then pulling it tight), so 6 mil works best.

These mesocosms are easy to make, cheap, disposable (so you don't have to
worry about cleaning between experiments), and are remarkably firm if you
fill them a few inches above water level to get positive pressure.

On Fri, 26 Feb 1999, DINA M. LEECH wrote:

> Hello All-
> I am considering constructing some cylindrical columns to incubate fish larvae
> in the water column of lakes.  The fish larvae will be approx. 5-10 mm in
> length.  The length of the cylinders will be 3-4 meters with 50-100 larvae per
> column.
> I was wondering if anyone has ever cultured or incubated fish larvae in
> cylindrical containers. If so, what is the minimum diameter needed for the
> cylinders?  It is important that the columns do not "drastically" change the
> behavior of the larvae.
> Thanks for your help...
> Dina M. Leech
> [log in to unmask]
> Dept. of Earth and Environmental Sciences
> Lehigh University
> Bethlehem, PA 18015
> Office #:(610) 758-3695
> ***************************************************************
>   <To leave send SIGNOFF FISH-SCI to [log in to unmask]>
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> ***************************************************************

Joan L. Manuel, Ph.D                    Department of Biology,
E-mail: [log in to unmask]               Dalhousie University,
or: [log in to unmask]                Halifax, Nova Scotia
                                        Canada.  B3H 4J1

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