Backyard Aquaponics
A place to discuss aquaponics

Can you give me information of the yabbies?

Hello, greetings from Spain, I am interested in this freshwater lobster. Could you tell me what is the scientific name of the variety of lobster (yabie)?


Could you tell me your yabie because is the most used in aquaponics and because people do not use other varieties?

What are the parameters (pH, temperature) of water to breed yabbies?

Do you know any website where I can get information about the Yabi?

Need dirt, gravel or other substrate the Yabi?

Did you ever have played?

How long does it take these locusts reproduce?

How many new yabies can succeed every time you play? Do the other locusts eat the eggs or new hatchlings?

Have you ever eaten? Yabies Are lobsters good to eat?

I will apologize for my language, thanks in advance.

http://en.wikipedia.org/wiki/Common_yabby

They like ph on the high side.

Apparently you can get hem in the US, so they might be available in your continent/country.

They like most substraits, they will dig a lot, they like lots of places to hide. They can be kept in high density compared to most fish. They grow fairly fast in warmer climates, and eat almost anything.

Including each other

Mainly each other

+1 agreed

Not sure about the high density part though??

only in an EDU

That was supposed to be a relative comparison... "higher" not necessarily "high"

I will agree to the point that they can indure poorer water quality (if that what you mean) but in relation to stock levels (other than EDU systems) compared to fish, they can only be stocked in small numbers.....about 7-10 per 1m2 of floor space but that is only a reasonable guidline due to their terratorial, canabilistic and agressive nature.

When it comes to stocking yabbies...... filtration to stock mass is never a consideration because you could never create a habitat complex enough to sustain them to a reasonable harvest weight to make it worth your while.

And EDU's....well....I think most members know how I feel about them....and this type of farming is on a different level.

I had three per half blue drum with 2 females to one male ratio and I now only have one left per drum. Buggers ate each other.

Okay so I'm wrong. But what about building yabbie high rise out of bread creates in an IBC... Surely you can keep more then 10 then

Your not wrong champ, they can be kept at higher densities than most fish but the only successful technology developed are EDU's which are extremely expensive and not really feasable for a backyard aquaponic application.

I love a good idea and I admire your thought train on stacking them with the aid of bread crates. Although there is a few issues that come with this, firstly you would have to stock a certain size to begin with (so they dont fall through the grid) so you would need a nursery tank that could accomodate this growth time frame...which would end up being a seperate complex system. Secondly feeding would be an issue, you couldnt just throw food in and expect them all to get their share, they guys on the bottom would get it all which could possibly lead to rotting food on the bottom which yopu would then need to pull it all out to clean.

Ive done a lot of experiments over the years and other than EDU's, there is only one other fail proof success story.....but even still that is not for high density but more so increased density from the 7-10 per 1m2 methadology.

I have 25 large yabbies in a 500litre DWC growbed that are individually housed in cylinders made from plastic aquaculture fish screen. The yabbies can still get propel themselves around, but they can't get to each other. I could fit lots more of them in, but then they couldn't move around freely, or else they would be in smaller cylinders, and it would be harder to get to them and I couldn't but as much food in at a time. I put enough food in each of them separately that lasts a week. They love sun rose foliage, and it lasts the week without rotting. They breed freely in the main pond which acts as a nursery, and when I come across a decent sized one, I pop it in the growbed.

iwoc - I would say (IMO) that the primary reason that you see a lot of discussion on this forum about yabbies, is that many areas of Australia have local populations for the taking, or are readily available to the people that have them, and that is the reason they have them in the first place. Of all the different types of freshwater crayfish that I have tried, they are all pretty similar in taste, so you would probably be best served by using whatever introduced species you are able to source locally in lakes, rivers, or even a market. It beats having to go through significant paperwork and expense of trying to import something that might not even be allowed. I believe that the indigenous types of crayfish in your area are protected, and the authorities likely don't want more exotic competitors being brought in.

How would it work to have yabbies or other crayfish on the bottom of a sump?

Are not crayfish partially dretritivores that could help "clean up" the solids from the fish? Maybe even the eggs of over productive Tilapia or others?

How about if you would have a solid lift overflow (or a pump...?) from the bottom of the FT, sucking up solids and fish eggs, maybe even some unlucky fry in.

Could that work to provide them with a constant stream of feed while reducing the solids from the fish to get out more animal crop out of your system?

Maybe you could even grow duckweed on top of the sump as fresh fish feed while also letting it take care of an excess of nutrients from decaying matter in the sump?

This could maybe work out to place under the grow beds to shield from the sun and wind ( think i read that duckweed don´t like this?) while using up the extra space?

/H

Yabbies in a sump is fairly common practice