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 Post subject: Re: Crayfish system
PostPosted: Mar 29th, '10, 11:30 
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desertrat wrote:
Hi EB
If the yabbie breeding system is so good why are they selling?
20 grand seems pretty expensive.
Remember I started a challenge for ideas on intensifing yabbies would love to see more ideas come in!
Grunta can you posted some pics of your shade cloth idea?

This is a carryover from the Giant Freshwater Prawn thread. With Prawn it is only one animal per 2 square feet of bottom surface area the link shows a bunch of horizontal sheets of netting to multiply that surface by many times. http://www.aquacultureoftexas.com/tanks.htm

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 Post subject: Re: Crayfish system
PostPosted: Mar 29th, '10, 12:23 
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grunta wrote:
... i can post some pictures if you would like.


+1 to interested in seeing some pics grunta!


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 Post subject: Re: Crayfish system
PostPosted: Mar 29th, '10, 13:35 
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Hey DV
May be too far for a meal but definitely not too far for a holiday!

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 Post subject: Re: Crayfish system
PostPosted: Mar 29th, '10, 13:48 
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Hi BRB
Thanks for the link to the Texas aquaculture centre ( http://www.aquacultureoftexas.com/tanks.htm ) it has given me some ideas that I would like to trial.
The forum is truly a great place for sharing and developing ideas

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 Post subject: Re: Crayfish system
PostPosted: Mar 29th, '10, 20:00 
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desertrat wrote:
Hi BRB
Thanks for the link to the Texas aquaculture centre ( http://www.aquacultureoftexas.com/tanks.htm ) it has given me some ideas that I would like to trial.
The forum is truly a great place for sharing and developing ideas

No doubt... I am totally addicted 8)

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 08:39 
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DéjàVoodoo wrote:
I'm not real sure I understand the apeal of crawfish. In the states, they are pretty small, tastless and hard to make a meal of. OK - crawfish ettoufe is good, but all the work is done for you. I can understand some of the big yabbies and Marron you get in AU, but these little things we have are just hard to get full on.

I actually had the blue water special tonight: 1/2lb snow crab, 12 shrimp and 24 crawfish. Plus corn and potatoes. It was good, but most the crawfish came home in a doggie bag as they are so much more trouble then shrimp or crab and taste nowhere as good.

Someone please tell me what I am missing????



Signal Crayfish are pretty big, and pretty tasty. They're from the Pacific Northwest, rather than Louisiana.


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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 14:30 
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Cant believe I missed this thread!

The yabbie (cherax albidus) for West Oz and (cherax destructor) for the East.

Aboriginal names are koonacs and gilgies.

EDU systems IMO are an absolute disgrace to Australian aquaculture farming. It is cage farming at its greatest and is solely directed at supplying the japanese market. This is the only reason a decent profit can be made from our beautiful native creatures and it is a spit in the face to our local farmers doing it the right way through damming and local supply. I have read of them harvesting at as low as 20g which is the female breeding weight.

I have personally tried these types of yabbies and the taste is far from the real thing, they are kept in small plastic confinements and have no means of exercise or movement for most of their life, producing an undefined poor product. I grew up on dammed yabbies (or gilgies as we call them) and they produce a beautiful meat that is unique and iconic of our land.

I own a large amount of gilgies (some are pets and have been with me for some time) and the growth rates are immeasurable, although high stocking densities are proven to limit growth rates in an open environment I can assure you that it is the only way to produce the original product and taste, but no large profit is to be made from farming these guys this way as a sole income source.

Gilgies are are fantastic addition to an AP system on a small scale but do a little researching before you go throwing a big heap in to your FT with expectations of a huge, care free harvest.

This topic is close to my heart. :thumbleft:

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 14:34 
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Charlie wrote:

The yabbie (cherax albidus) for West Oz and (cherax destructor) for the East.

Aboriginal names are koonacs and gilgies.


Are you sure about this Charlie...I always thought koonacs, gilgies and yabbies are different and Cherax destructor is what WA has :dontknow:

http://www.fish.wa.gov.au/docs/pub/IdCr ... 4.php?0304

The link takes you to the ID page

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 14:57 
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The cherax destuctor is from from the East Gnash, it was introduced to the west and adopted the name of cherax albidus. Koonacs are a rare find around my area although I assume they are more abundant more south. Gilgies are everywhere and can be easily mistaken for yabbies.

Confused yet?? :lol:

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 15:03 
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There is a lot of mixed information around the terminology.

The everyday, or common, name yabbie (from an aboriginal word) is loosely used for several species of small freshwater crayfish in eastern Australia. The true, or scientific, name for our Yabby in WA is Cherax albidus. The first name is the group, or genus, of rather similar crayfish to which yabbies belong (over 30 species in Australia and PNG, including marron, koonacs and gilgies in WA). The generic name, Cherax, is thought to be a mispelling of the Greek word Charax, meaning a pointed stake - a thing that scratches. The second name (no capital letter) is the particular species, the white Yabby which was first named as Cherax albidus by a Victorian museum taxonomist, Dr Ellen Clark, in 1936. Our yabbies were introduced from the Wimmera farming district in western Victoria - the exact spot is known, Miram swamp near Nihil. It is an interesting coincidence that the species name for our yabbies is derived from the same Latin word ("albus" = white) which is used to describe the reflection of sunlight from our white clay dams ("albido"), where white yabbies are so successful.

Hope this better sums it up Gnash. :thumbleft:

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 15:06 
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Charlie wrote:
Confused yet?? :lol:


Most of my life :lol:

I'm heading down south this weekend and know a nice little river with Koonacs in...hopefully I'll catch a couple and take some pics, we go out at night with a torch and scoop net to get them.
Koonacs are definately more aggressive than yabbies toward other animals but not to each other as far as I've found.

Anyway as for the EDU's I've always wondered how the yabbie sheds its shell in them as Bob (my yabbie in the tank) always violently swims around to crack the escape opening in his shell before shedding...in the EDU there is no room to do this ergo no growing bigger :dontknow:

You have any ideas :?:

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 15:13 
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Your spot on Gnash,

A yabbie will shed its shell weekly when small but as you know the time between is greater as they grow, I assume this is is why they harvest sooner as this would otherwise prove an issue when product weights are larger. Once again, another issue with this type of farming!
For an EDU to be a financial it needs to produce massive amounts frequently, the only way to produce this is over-population and early harvest. Its wrong on so many levels.

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 15:16 
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Any chance of you passing through Kalgoorlie with some of those Koonacs Gnash? You may have just scored yourself a new best friend hehe. :thumbright: :thumbright: :thumbright: :thumbright:

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 15:22 
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Charlie wrote:
Any chance of you passing through Kalgoorlie with some of those Koonacs Gnash? You may have just scored yourself a new best friend hehe. :thumbright: :thumbright: :thumbright: :thumbright:


Just a tiny bit out of the way unfortunately :whistle:

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 Post subject: Re: Crayfish system
PostPosted: Jun 30th, '11, 19:46 
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Just reflecting back over this post this afternoon and IMO when thinking about introducing crustaceans to an AP system you cant go past the Marron. They co-habitate better, taste better and produce a greater mass of food in comparison to the yabbie. Just make sure you have cover on your FT as they will escape by climbing up air lines, cables and the walls of you tank.

Sorry for you guys over seas as Id imagine they arent available to you. Also realised I may have hijacked this post a little so in reference to the crayfish/ crawfish in AP.... I have no idea, sorry.
:thumbright: :thumbright: :thumbright: :thumbright: :thumbright: :thumbright: :thumbright:

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