Aquaponics Digest - Wed 01/26/00

Message   1: Re: Iowa Protein's spent layers for fish feed
             from "KevinLReed" 

Message   2: trout growth...correction
             from "Marc Laberge" 

Message   3: fish spoilage
             from "Marc Laberge" 

Message   4: Re: fish spoilage
             from "Sam Levy" 

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| Message 1                                                           |
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Subject: Re: Iowa Protein's spent layers for fish feed
From:    "KevinLReed" 
Date:    Tue, 25 Jan 2000 23:30:23 -1000

Algae, sugarcane and sugar palm ( which takes a while to grow ) are the most
efficient converters of nutrients and sunlight into calories. Why don't they
use sugarcane for animal food and the dead chickens to fertilize the cane?
(Just a thought ) ... Is this chicken process like MDT ( mechanically
de-boned turkey)? They flash freeze the turkey and grind it so small the
cells are ruptured then either fast cook or fill with nitrates to make
healthy turkey hot dogs and the like. I wonder if the chicken process will
work on apple snails?

I like the thinking about aquaculture products that will work as plant to
animal feed systems or animal to feed plant systems. The " living" systems
seem to be more efficient and environmentally responsible. I just wonder how
large they can be and still compete or out-compete normal agro- business. As
for fish and eggs delivering more bang for the buck ... there are problems
what ever way you go .... ask Arkansas about chicken crap or fish effluent
for that matter. Looks like any system can work if you work it right. I do
like the Sperano system as it is very simple and fairly closed. Lacking mad
fish disease it looks like it could be the agricultural risk management tool
to gain into larger markets.
Kevin
----- Original Message -----
From: "TGTX" 
To: 
Sent: Tuesday, January 25, 2000 7:20 PM
Subject: Re: Iowa Protein's spent layers for fish feed
>
> The plant protein sources for those feeds can include soybeans, linseed,
> corn, algae...and even duckweed (anyone tried alfalfa... or Okra seed?).
If
> this is so, then it seems we could get a bigger economic and perhaps a
> bigger ecological efficiency "bang for our buck" by emphasizing fish (and
> other aquaculture animals with similar FCRs) and egg protein production in
> our agriculture.  Any comments on that line of thinking?
>
> But I still like the whole chicken thing you are discussing here.  Very
> interesting.
>
> Have a nice evening.
>
> Ted
>

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Subject: trout growth...correction
From:    "Marc Laberge" 
Date:    Wed, 26 Jan 2000 22:40:01 -0500

Last week I answered a few questions by Donna...

I said at 15C a 3 inch trout can reach 13 in 9 months... I should have wrote
12 months ...sorry for any inconvenience

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Subject: fish spoilage
From:    "Marc Laberge" 
Date:    Wed, 26 Jan 2000 22:54:06 -0500

Hi Chris,

        As I said, it is my guess that cold water fish spoil faster than
warm water fish. I used to coordinate commercial pilot fishery projects in
northern Quebec and noticed that these fish would spoil rather fast ; I
figured it was due to them having a yearly average body temperature well
below than what I was used to. Because their body tissues were used to this
cold, I figured the tissue breaks down faster at a higher temperature. I
could be totally off the wall here but it made sense to me at the time.

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Subject: Re: fish spoilage
From:    "Sam Levy" 
Date:    Wed, 26 Jan 2000 21:00:03 PST

marc & chris,

it seems to me that if cold water fish spoil faster than warmwater species 
(i have no idea if this is true or not), it may have the following sources:

prevalence of cold-tolerant bacteria on &/or in the animal

differing fat to bodyweight ratios

longer killtime for coldwater species

handling & packing procedures

sam

>From: "Marc Laberge" 
>Hi Chris,
>
>         As I said, it is my guess that cold water fish spoil faster than
>warm water fish.