Aquaponics Digest - Wed 07/28/99




Message   1: Re: Aluminum roof pans, red lettuces

             from Adriana Gutierrez & Dennis LaGatta

Message   2: Re: SGVGA Meeting

             from Ron Neujahr 

Message   3: Watercress

             from Joy Pye-MacSwain 

Message   4: FYI - Call for Abstracts

             from "Charlie Shultz" 

Message   5: Re: SGVGA Meeting

             from "JAY MYERS" 

Message   6: RE: Watercress

             from "Ronald W. Brooks" 

Message   7: Re: SGVGA Meeting

             from "vpage" 

Message   8: Re: RE: Watercress

             from Bagelhole1

Message   9: RE: RE: Watercress

             from "Ronald W. Brooks" 

Message  10: Re: SGVGA Meeting

             from atkindw@cwjamaica.com (david w atkinson)

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 1                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Re: Aluminum roof pans, red lettuces

From:    Adriana Gutierrez & Dennis LaGatta 

Date:    Wed, 28 Jul 1999 08:10:49 -0400

The roof pans are very strong. You need to add support every 3-4 feet to

avoid sagging. They come in 3 gauges of metal, for this application you

buy the tickest one.  

 

> Will the roof pans hold much weight if properly supported?  Say about 450

> lbs of water.

Galactic is billed as a type of Redina which is of the grand rapids

variety.  When you check it out in Johnnys  catalog page 32.  In the

greenhouse the color is nowhere near as red.

Speaking of red lettuces, here are a few more varieties which were not

successful in our bright sun and hot weather and humidity:  Mikola,

Ruby, Redina, Red Rage, Impuls,  Red Orach, Bacardi(OE), Mascara (OE),

Raisa (OE).  All seeds were from Johnny's except for the ones marked

(OE) which came from Ornamental Edibles.  The plants weren't a total

loss, the grew well but were very green.  These varieties may have

better color in areas with cooler weather or greater day-night

temperature differentials than we have here in Florida.

> We grow a lot of Cerize with the Revolution, both do really well here for

> salad mixes.  Can't remember if we tried Galactic.  What type is it?

Adriana

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 2                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Re: SGVGA Meeting

From:    Ron Neujahr 

Date:    Wed, 28 Jul 1999 07:55:03 -0500

Paula,

Yes we have now completed the last annual conference of the SGVGA for

this century.  We had a very good program for all skill levels in both

hydroponics and aquaponics.

Our conference next year will be held in Tyler again, in 2000.  The

dates are July 14 -16, 2000.  We have started making plans, have

scheduled a tour and are making arrangements for speakers.

So any who would like more information on upcoming event of SGVGA of

2000, please reply and I will put you on our active email news group

list.

You all have a great day,

Ron Neujahr

President, SGVGA

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 3                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Watercress

From:    Joy Pye-MacSwain 

Date:    Wed, 28 Jul 1999 10:10:58 -0300

> Morning Ron........

This whole discussion on Y2K has been very interesting.  However, since I have a

couple of computer programer friends who were specifically employed in

correcting

Y2K problems in Federal government departments who have recently been laid

off because all the systems are completely ready for January, I have taken a

more

jaundiced view of the problems that Y2K may create, at least here in Canada.

Anyway your most recent response to Tom has sparked a couple of questions.

> When we talk about feed to growth rate we are talking about feeding a

> complete pellet diet. I feed at 4% of body weight . While the fish will eat

My fish are still only fingerlings, about 1.2 g and i am feeding them at a rate

of about

6% body weight per day (5 satiation feedings per day).  I am assuming that your

4%

rate is for older fish?

>

> all the algae that grows and certain greens that you throw in you should

> expect to almost double the time to harvest if that is all that is feed. As

> for worms , some people have had luck  but Tilapia are vegetarians by

> nature. Plus you would have to have a facility that is almost an acre to be

> able to feed the amount of worms needed. I just don't think it would be

> feasible in sustainable situation. I am running water hyacinth and water

> cress in the settling tanks and the fish then are fed free choice of these

> plants. It seems to stimulate the appetite.

I am planning on adding watercress to the facility, any advice on how much

watercress that I should  offer to the fish on any given day and do I need to

wait

for them to reach a certain size before offering them the cress?

Also can anyone offer some advice on tomatoe plants?  Mine were doing fine

until I transplanted into pea gravel and after couple of weeks  I noticed brown

spots

in the lower leaves.  I am assuming I have a magnessium deficiency and plan on

spraying with a 2% solution of epsom salts today ... however if anyone has any

other suggestions I would love to hear them.  Thanks.

Joy

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 4                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: FYI - Call for Abstracts

From:    "Charlie Shultz" 

Date:    Wed, 28 Jul 1999 06:10:52 PDT

1st CALL FOR ABSTRACTS

Internet Conference on Material Flow Analysis of Integrated Bio-Systems

(March-Oct 2000)

The Institute of Advanced Studies of the United Nations University (Tokyo)

(http://www.ias.unu.edu) and the UNU/IAS Integrated Bio-Systems Network

(http://www.ias.unu.edu/proceedings/icibs/ibs/ibsnet), in cooperation with

other organizations, welcome authors to submit abstracts of papers for the

Internet Conference on Material Flow Analysis of Integrated Bio-Systems

(IC-MFA-IBS) between March and October 2000.

The Conference (IC-MFA-IBS) is a follow-up of the 1998 Internet Conference

on Integrated Bio-Systems (http://www.ias.unu.edu/proceedings/icibs) and

other Internet conferences that were organized on the use of ecotechnology

(1994) and ecological engineering (1995, 1996) in integrated bio-systems.

IC-MFA-IBS will provide papers on the web for discussions via the web and

email. The goal of the conference is to facilitate a dialogue, with the

objective of generating information that is useful to academia, industry,

governmental and non-governmental organizations and funding agencies, on

the role and application of integrated bio-systems in zero waste and

emission, food production and security, sustainable industrial and

agricultural development and climate change.

An integrated bio-system (IBS) integrates at least 2 sub-systems so that

the wastes generated by the first system are used by the next biological

sub-system to produce value-added products. A common example is the use of

animal manure from a livestock sub-system to produce biogas and then using

nutrients in the digested slurry for crop and fish production. The general

aim of an IBS is to turn material flow with losses into a closed and

integrated one. IBSs can be designed for a number of purposes, e.g. to

enhance resource and waste uilisation in agriculture, aquaculture, industry

and for eco-buildings, human communities and cities (see

http://www.ias.unu.edu/proceedings/icibs/ibs/info for more examples). The

material flow analysis (MFA) is key to the design and operation of an IBS.

By quantifying the material flows, useful information is generated  to

solve problems, to make systems more robust to changes and for the

development of new ideas, planning of projects, and decision and policy

making.

SCOPE

This Internet Conference will have a central focus on the analysis of

material flows in integrated bio-systems. The organisers welcome abstracts

of papers that can describe and quantify the flow of materials in existing

and conceptual bio-systems under the following themes :

1) Municipal Biodegradable Solid Recycling and Conversion Systems

MFA of systems that includes recycling and conversion of biodegradables,

food scraps, yard trimmings and greens into bio-fuels, organic fertiliser,

animal feed, biochemicals, etc. using biological sub-systems such as

anaerobic digestion, composting, vermi-culture, etc.. New methods,

alternative natural systems for control or remediation to avoid the need

for landfills, conventional wastewater plants,

etc.

2) Wastewater Treatment and Utilisation Systems

MFA of systems using plants, microbes, shellfish in wastewater treatment

and use of wastewaters in crop irrigation, aquaculture, wetlands, forests,

etc. crop-aquaculture, livestock-aquaculture systems, integrated

aquaculture/polyculture systems, etc..

3) Integrated Aquaculture Systems

MFA of aquatic food production systems such as integrated

aquaculture/polyculture systems, fish-shellfish-seaweed systems,

aquaculture-terrestrial integrated bio-systems, silvifisheries, fish

ranching, etc.

4) Small Scale Farming Systems

MFA of household bio-systems with sub-systems like livestock, biogas

digesters, fish ponds, compost, vermicompost, vegetable gardens and crops

plots, fruit trees, aquatic plants, etc.

5) Large Plantations, Farms and Feedlots

MFA of corporate and cooperative agricultural systems using of agro-crop

residues and livestock manure for production of feed, food, fibre,

chemicals, energy, etc.

6) Constructed Building Complex, greenhouse and Eco-house Systems

MFA of bio-systems in/on buildings for waste water treatment, food

production, hydroponics, aquaponics; waste recycling or using animals and

compost to heat greenhouses, etc.

7) Industry and Eco-Industrial Parks

MFA of bio-systems for cleaner production, industries and industrial parks

to utilise primary by-product wastes for biochemicals, food and energy

production in co-operative implmentation of shared systems for

complementary recovery and use.

8) Resource Utilization and Conservation in Sustainable Eco-Systems

MFA of bio-systems for sustainable resource utilisation e.g. in watersheds,

reservoirs, lakes, river basins, community forests, natural parks, coral

reefs, mangroves, etc..

9) Small Islands, Community, Villages and Cities

MFA of IBSs for sustainable living in human communities and for urban

ecology and environmental management

10) Global Issues related to Food Security, Environment and Climate Change

e.g. regional studies where integrated bio-systems are used to play crucial

roles to sustain food security, zero emissions and wastes; and reduction of

greenhouse gases.

11) Tools and Methodology for Design and Analysis of Integrated

Bio-Systems.

e.g. softwares and methods for material flow analysis

PROCEDURE FOR SUBMISSION AND REVIEW OF ABSTRACTS

Abstracts should not be more than 1 page in size and may contain text,

table, diagrams. It should include title of paper, full name(s) and postal

and email address(es) of author(s), abstract and keywords. Please send

abstracts to foo@swipnet.se.

All submitted abstracts will be reviewed by the Planning Group of the

Conference. Authors should wait for formal notification of acceptance

before proceeding into preparation of the full papers.

DEADLINE FOR SUBMISSION OF ABSTRACTS

The deadline for the 1st Call for Abstracts is Oct 31, 1999.

A 2nd Call for Abstracts will be made at a later date, if needed.

CONFERENCE INFORMATION

General information is available at

http://www.ias.unu.edu/proceedings/icibs/ic-mfa/

Future announcements will be made via

http://segate.sunet.se/archives/et-w11.html

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 5                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Re: SGVGA Meeting

From:    "JAY MYERS" 

Date:    Wed, 28 Jul 1999 08:41:57 -0500

Please put me on you active e-mail news group list.

Thanks very much

Jay Myers

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 6                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: RE: Watercress

From:    "Ronald W. Brooks" 

Date:    Wed, 28 Jul 1999 10:36:26 -0400

-> [mailto:aquaponics]On Behalf Of Joy Pye-MacSwain

-> Sent: Wednesday, July 28, 1999 9:11 AM

-> Anyway your most recent response to Tom has sparked a couple of

-> questions.

->

-> > When we talk about feed to growth rate we are talking about feeding a

-> > complete pellet diet. I feed at 4% of body weight . While the

-> fish will eat

->

-> My fish are still only fingerlings, about 1.2 g and I am feeding

-> them at a rate

-> of about

-> 6% body weight per day (5 satiation feedings per day).  I am

-> assuming that your

-> 4%

-> rate is for older fish?

->

Right now I am feeding breeders, but I also supplement with green foods like

watercress, water hyacinth, and string algae. The water hyacinth is free

choice so to speak , I replace it when it is gone.

-> >

-> I am planning on adding watercress to the facility, any advice

-> on how much

-> watercress that I should  offer to the fish on any given day and

-> do I need to

-> wait

-> for them to reach a certain size before offering them the cress?

->

I offer as much cress as they will eat in two hours any more than this and

they seem to not want to eat the pellets as well. I would offer the cress as

soon as they reach 2 inches. Mine at that size went after it and ate it

without any problems. Smaller than two inches I feed supplemental string

algae. I noticed that if they fry were not that aggressive in feeding or

that their appetites slacked off by adding a feeding of algae it snapped

them back into a good feeding routine. Presently I feed 6 times a day 3

hours apart starting at 7 am

-> Also can anyone offer some advice on tomato plants?  Mine were

-> doing fine

-> until I transplanted into pea gravel and after couple of weeks

-> I noticed brown

-> spots

-> in the lower leaves.  I am assuming I have a magnesium

-> deficiency and plan on

-> spraying with a 2% solution of Epsom salts today ... however if

-> anyone has any

-> other suggestions I would love to hear them.  Thanks.

->

-> Joy

->

Paula needs to jump in here as I  believe she grows tomato's in her system

Ron

The One Who Walks Two Paths

ICQ 44271371

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 7                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Re: SGVGA Meeting

From:    "vpage" 

Date:    Wed, 28 Jul 1999 08:54:47 -0600

Please add me to your mail list.Thanks

VPage

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 8                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Re: RE: Watercress

From:    Bagelhole1

Date:    Wed, 28 Jul 1999 12:30:49 EDT

In a message dated 7/28/99 3:40:48 PM, orchid@kellnet.com writes:

<>

Dear Ron,

        This seems like a full time job with overtime, is this what one needs 

to do to keep these fish growing? Isn't there any time saving or less time 

consuming way? Tom O (bagelhole1)

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 9                                                           |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: RE: RE: Watercress

From:    "Ronald W. Brooks" 

Date:    Wed, 28 Jul 1999 12:55:18 -0400

-> [mailto:aquaponics]On Behalf Of Bagelhole1

-> Sent: Wednesday, July 28, 1999 12:31 PM

->

->

->

-> Dear Ron,

->         This seems like a full time job with overtime, is this

-> what one needs

-> to do to keep these fish growing? Isn't there any time saving or

-> less time

-> consuming way? Tom O (bagelhole1)

Tom

There are plenty of time saving inventions out there including training the

fish to hit a rod or rope that hangs off of a demand type feeder. When the

bump it it drops feed. Or you can use a timed feeder , vibratory feeder ,

there all kinds of automated feeding equipment out there.  Go to

http://www.aquaticeco.com for ideas and go ahead and contact them and order

there catalog.

Now the reasons I feed the way I do

I run several research tanks and measure the feed intake down to the gram.

So when I say that I am getting a feed to growth ratio of 1.4 or 1.3 to 1 I

have the data to back it up. Also I am working on the protocols for a

project involving Red Claw. There is not much literature out there on

polyculture of Red Claw with Tilapia other than a few that stated slower

growth rates when mixing. So I am designing one that should find out whether

it is the Red Claw being aggressive towards the fish of it is a factor of

the Red Claw itself.

First thing in the morning at 7 am I go and weigh out the feed for the whole

day. That done it takes about 5 minutes every three hours to feed and  log

the data . I watch for a lot of factors during feeding and record it.

I also know how the fish feed and can catch any problems very early. And

discover the problem and correct it. I think for those that use automatic

feeders to take the time to observe their fish several times a day during

feeding so you know what is going on with the fish. If you only check the

fish every few days when you refill the feeders than you run the possibility

of coming in to fill the feeders to a tank full of dead or dying fish.

Hand feeding is cheaper in the start up equipment wise but does take time.

So most of you should not emulate my system which is primarily designed for

research, with the secondary benefit of providing me with fresh fish to eat.

Ron

The One Who Walks Two Paths

.------ ------ ------ ------ ------ ------ ------ ------ ------ ------.

| Message 10                                                          |

'------ ------ ------ ------ ------ ------ ------ ------ ------ ------'

Subject: Re: SGVGA Meeting

From:    atkindw@cwjamaica.com (david w atkinson)

Date:    Wed, 28 Jul 1999 20:06:07 -0500

Yes, please put me on the email newsgroup list.

David (from Jamaica West Indies)

S&S Aqua Farm, 8386 County Road 8820, West Plains, MO 65775  417-256-5124

Web page  http://www.townsqr.com/snsaqua/



Back to Index