Aquaponics Digest - Mon 01/26/98
Message 1: Re: Red Claw
from John Shannonhouse
Message 2: Trout
from S & S Aqua Farm
Message 3: Re: Red Claw
from Rebecca Nelson
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Subject: Re: Red Claw
From: John Shannonhouse
Date: Mon, 26 Jan 1998 02:12:05 -0600
Hello,
On 25 Jan 1998, Gordon Watkins wrote:
<>
<>
Red claw, like prawns and other crawfish, feed bacteria that grow
on the substrate they consume (detritus, straw, feces, etc.). I doubt they
would try to eat a Tilapia fry. I'm not sure if a Tilapia would try to eat
a tiny red claw, but they won't eat prawn. I think it is unlikely that
Tilapia would eat crawfish (then again, catfish will eat crawfish but not
prawns).
Based on what I have read about polyculture of prawns and Tilapia,
I would raise them in the same vat with no division (at least a portion of
them to see if the Tilapia try to eat them). Prawns grow rapidly when
raised with Tilapia because the Tilapia feces are very rich in bacteria
that the prawn consume. The same principle should apply to red claw.
John Shannonhouse
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Subject: Trout
From: S & S Aqua Farm
Date: Mon, 26 Jan 1998 08:46:23 -0600
I have experienced a small problem with my mail program, and lost a few
messages. I do remember someone asking for address information for the
Freshwater Institute and their studies on trout. I retrieved the following
from the archive file and hope that it answers the question posted. If not,
please post again. Paula
From: jenkin10@ix.netcom.com
Date: Fri, 16 Jan 1998 07:51:33 -0800
To: S & S Aqua Farm
Subject: Re: Trout
References: <1.5.4.32.19980114152604.006a2da8@townsqr.com>
S & S Aqua Farm wrote:
>
> We appreciate the info that Jack and Dan furnished. As with other species,
> I'm sure it's possible to get a great deal of information also from the aqua
> mail groups and web links. We don't have any immediate plans ourselves to
> switch from Tilapia to trout, but have had many inquiries as to trout's
> ability to produce well in an aquaponics system. Most of these inquiries
> come from countries where tilapia fingerling supplies are not easily
> available and/or water temperature concerns (costs?) are raised.
>
> At 08:19 AM 1/13/98 -0600, Chuck Hicks wrote:
>
> >The Freshwater Institute at Shepherdstown, West Virginia has a series of
> >publications about producing trout in recirculating systems. They also
> >worked in coordination with a USDA laboratory in studing the use of
> >effluent and wastes from the system for producing different types of
> >useabel crops. I am sure that they would provide you with copies of
> >their publications if requested.
> >
> >Chuck Hicks
>
> To Marten Jenkins - is this Freshwater Institute where you're located?
> Could you share some of these results (summarized if necessary) with the
group?
>
> Are these publications available to the public by mail or in a format that
> they could be accessed through a web site?
>
> Paula Speraneo
> S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
> Web page http://www.townsqr.com/snsaqua/
Paula:
We would be happy to share the results of our research on salmonid
production in recycle systems and on plant-based effluent treatment
systems. We are in the process of upgrading our website
(www.conservationfund.org). Some of our researchn is summarized on our
web site. We hope to have a list of our publications on our web site
within the next few months. If people would like copies of our
publications, they can call me at (304) 876-3410 or send me an e-mail to
request information.
Marten Jenkins
The Freshwater Institute
PO Box 1746
Shepherdstown, WV 25443
ph (304) 876-3410
fax (304) 876-6339
jenkin10@ix.netcom.com
Shepherdstown
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Subject: Re: Red Claw
From: Rebecca Nelson
Date: Mon, 26 Jan 1998 08:44:26 -0800
Hello,
I've just set up a 400 gallon tank that I am adding Red Claw Crawfish
and Koi to. The Red Claw are coming from Belmont Hot Springs, Fielding,
UT 801-458-3200. I've been told that they are not predators and should
be compatible in a tank with fish. It was suggested to me that some
type of cover be provided for the crayfish to prevent cannibalistic
behavior (ie: short pieces of PVC pipe) when growing them in tank
culture.
The aquaponics part of this system is NFT trays where I am growing a
variety of leaf lettuces.
I will keep you posted on the progress of this system.
Gordon, I would like to read the booklet you mentioned. Where can I get
a copy?
Thanks,
Rebecca
Nelson / Pade Multimedia, ph 209.742.6869, fax 209.742.4402
http://www.aquaponics.com
Publisher of the Aquaponics Journal, a bi-monthly newsletter
Gordon Watkins wrote:
>
> Hello everyone,
> I just finished reading an interesting little booklet entitled, "Red
> Claw - Raising the Giant Australian Freshwater Crayfish" and I'm
> wondering if anyone on this list has had any experience with these
> critters? They require much the same conditions as tilapia and are
> tolerant of less than optimum water conditions. They can grow up to 4 oz
> in 7 months and up to 14 oz in the second year and dressout up to 30%
> edible meat. They spawn readily in captivity, are less agressive and
> will tolerate higher stocking rates than the other Australian crays like
> yabbies and marron. I'm not sure if they could be grown in the same
> quarters with tilapia due to the potential of large crays eating small
> tilapia and vice-versa, but I think they could be raised in partitioned
> vats.
> If anyone's grow these mudbugs I'd like to hear from you. I'm also
> looking for a source for about 50 juveniles, if anyone has leads.
>
> best regards,
> Gordon
--
Nelson / Pade Multimedia, ph 209.742.6869, fax 209.742.4402
http://www.aquaponics.com
Publisher of the Aquaponics Journal, a bi-monthly newsletter
The Encyclopedia of Hydroponic Gardening CD-Rom
All About Aquaculture CD-Rom
Hobby Hydroponics Video
Hydroponics Curriculum
How To Start and Succeed in the Hydroponics Business
S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775 417-256-5124
Web page http://www.townsqr.com/snsaqua/
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